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Format all files IAW the Google C++ Style Guide.

Browse Source 
Use clang-format to correct formatting to be in agreement with the [Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html). Doing this simplifies the process of accepting changes. Also fixed a few warnings flagged by clang-tidy.

PiperOrigin-RevId: 246350737
This commit is contained in:
Chris Mumford 2019-05-02 11:01:00 -07:00 committed by Victor Costan
parent 3724030179
commit 297e66afc1
125 changed files with 1967 additions and 2326 deletions
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18
.clang-format Normal file
View File

@ -0,0 +1,18 @@
# Run manually to reformat a file:
# clang-format -i --style=file <file>
# find . -iname '*.cc' -o -iname '*.h' -o -iname '*.h.in' | xargs clang-format -i --style=file
BasedOnStyle: Google
DerivePointerAlignment: false
# Public headers are in a different location in the internal Google repository.
# Order them so that when imported to the authoritative repository they will be
# in correct alphabetical order.
IncludeCategories:
- Regex: '^(<|"(db|helpers)/)'
Priority: 1
- Regex: '^"(leveldb)/'
Priority: 2
- Regex: '^(<|"(issues|port|table|third_party|util)/)'
Priority: 3
- Regex: '.*'
Priority: 4

8
README.md
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@ -86,6 +86,14 @@ Contribution requirements:
3. **Tests**: All changes must be accompanied by a new (or changed) test, or
a sufficient explanation as to why a new (or changed) test is not required.
4. **Consistent Style**: This project conforms to the
[Google C++ Style Guide](https://google.github.io/styleguide/cppguide.html).
To ensure your changes are properly formatted please run:
```
clang-format -i --style=file <file>
```
## Submitting a Pull Request
Before any pull request will be accepted the author must first sign a

25
db/autocompact_test.cc
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@ -2,9 +2,9 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "leveldb/db.h"
#include "db/db_impl.h"
#include "leveldb/cache.h"
#include "leveldb/db.h"
#include "util/testharness.h"
#include "util/testutil.h"
@ -81,17 +81,16 @@ void AutoCompactTest::DoReads(int n) {
ASSERT_LT(read, 100) << "Taking too long to compact";
Iterator* iter = db_->NewIterator(ReadOptions());
for (iter->SeekToFirst();
iter->Valid() && iter->key().ToString() < limit_key;
iter->Next()) {
iter->Valid() && iter->key().ToString() < limit_key; iter->Next()) {
// Drop data
}
delete iter;
// Wait a little bit to allow any triggered compactions to complete.
Env::Default()->SleepForMicroseconds(1000000);
uint64_t size = Size(Key(0), Key(n));
fprintf(stderr, "iter %3d => %7.3f MB [other %7.3f MB]\n",
read+1, size/1048576.0, Size(Key(n), Key(kCount))/1048576.0);
if (size <= initial_size/10) {
fprintf(stderr, "iter %3d => %7.3f MB [other %7.3f MB]\n", read + 1,
size / 1048576.0, Size(Key(n), Key(kCount)) / 1048576.0);
if (size <= initial_size / 10) {
break;
}
}
@ -100,19 +99,13 @@ void AutoCompactTest::DoReads(int n) {
// is pretty much unchanged.
const int64_t final_other_size = Size(Key(n), Key(kCount));
ASSERT_LE(final_other_size, initial_other_size + 1048576);
ASSERT_GE(final_other_size, initial_other_size/5 - 1048576);
ASSERT_GE(final_other_size, initial_other_size / 5 - 1048576);
}
TEST(AutoCompactTest, ReadAll) {
DoReads(kCount);
}
TEST(AutoCompactTest, ReadAll) { DoReads(kCount); }
TEST(AutoCompactTest, ReadHalf) {
DoReads(kCount/2);
}
TEST(AutoCompactTest, ReadHalf) { DoReads(kCount / 2); }
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

13
db/builder.cc
View File

@ -4,8 +4,8 @@
#include "db/builder.h"
#include "db/filename.h"
#include "db/dbformat.h"
#include "db/filename.h"
#include "db/table_cache.h"
#include "db/version_edit.h"
#include "leveldb/db.h"
@ -14,12 +14,8 @@
namespace leveldb {
Status BuildTable(const std::string& dbname,
Env* env,
const Options& options,
TableCache* table_cache,
Iterator* iter,
FileMetaData* meta) {
Status BuildTable(const std::string& dbname, Env* env, const Options& options,
TableCache* table_cache, Iterator* iter, FileMetaData* meta) {
Status s;
meta->file_size = 0;
iter->SeekToFirst();
@ -60,8 +56,7 @@ Status BuildTable(const std::string& dbname,
if (s.ok()) {
// Verify that the table is usable
Iterator* it = table_cache->NewIterator(ReadOptions(),
meta->number,
Iterator* it = table_cache->NewIterator(ReadOptions(), meta->number,
meta->file_size);
s = it->status();
delete it;

8
db/builder.h
View File

@ -22,12 +22,8 @@ class VersionEdit;
// *meta will be filled with metadata about the generated table.
// If no data is present in *iter, meta->file_size will be set to
// zero, and no Table file will be produced.
Status BuildTable(const std::string& dbname,
Env* env,
const Options& options,
TableCache* table_cache,
Iterator* iter,
FileMetaData* meta);
Status BuildTable(const std::string& dbname, Env* env, const Options& options,
TableCache* table_cache, Iterator* iter, FileMetaData* meta);
} // namespace leveldb

323
db/c.cc
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@ -5,6 +5,7 @@
#include "leveldb/c.h"
#include <stdlib.h>
#include "leveldb/cache.h"
#include "leveldb/comparator.h"
#include "leveldb/db.h"
@ -42,67 +43,79 @@ using leveldb::WriteOptions;
extern "C" {
struct leveldb_t { DB* rep; };
struct leveldb_iterator_t { Iterator* rep; };
struct leveldb_writebatch_t { WriteBatch rep; };
struct leveldb_snapshot_t { const Snapshot* rep; };
struct leveldb_readoptions_t { ReadOptions rep; };
struct leveldb_writeoptions_t { WriteOptions rep; };
struct leveldb_options_t { Options rep; };
struct leveldb_cache_t { Cache* rep; };
struct leveldb_seqfile_t { SequentialFile* rep; };
struct leveldb_randomfile_t { RandomAccessFile* rep; };
struct leveldb_writablefile_t { WritableFile* rep; };
struct leveldb_logger_t { Logger* rep; };
struct leveldb_filelock_t { FileLock* rep; };
struct leveldb_t {
DB* rep;
};
struct leveldb_iterator_t {
Iterator* rep;
};
struct leveldb_writebatch_t {
WriteBatch rep;
};
struct leveldb_snapshot_t {
const Snapshot* rep;
};
struct leveldb_readoptions_t {
ReadOptions rep;
};
struct leveldb_writeoptions_t {
WriteOptions rep;
};
struct leveldb_options_t {
Options rep;
};
struct leveldb_cache_t {
Cache* rep;
};
struct leveldb_seqfile_t {
SequentialFile* rep;
};
struct leveldb_randomfile_t {
RandomAccessFile* rep;
};
struct leveldb_writablefile_t {
WritableFile* rep;
};
struct leveldb_logger_t {
Logger* rep;
};
struct leveldb_filelock_t {
FileLock* rep;
};
struct leveldb_comparator_t : public Comparator {
void* state_;
void (*destructor_)(void*);
int (*compare_)(
void*,
const char* a, size_t alen,
const char* b, size_t blen);
int (*compare_)(void*, const char* a, size_t alen, const char* b,
size_t blen);
const char* (*name_)(void*);
virtual ~leveldb_comparator_t() {
(*destructor_)(state_);
}
virtual ~leveldb_comparator_t() { (*destructor_)(state_); }
virtual int Compare(const Slice& a, const Slice& b) const {
return (*compare_)(state_, a.data(), a.size(), b.data(), b.size());
}
virtual const char* Name() const {
return (*name_)(state_);
}
virtual const char* Name() const { return (*name_)(state_); }
// No-ops since the C binding does not support key shortening methods.
virtual void FindShortestSeparator(std::string*, const Slice&) const { }
virtual void FindShortSuccessor(std::string* key) const { }
virtual void FindShortestSeparator(std::string*, const Slice&) const {}
virtual void FindShortSuccessor(std::string* key) const {}
};
struct leveldb_filterpolicy_t : public FilterPolicy {
void* state_;
void (*destructor_)(void*);
const char* (*name_)(void*);
char* (*create_)(
void*,
const char* const* key_array, const size_t* key_length_array,
int num_keys,
size_t* filter_length);
unsigned char (*key_match_)(
void*,
const char* key, size_t length,
const char* filter, size_t filter_length);
char* (*create_)(void*, const char* const* key_array,
const size_t* key_length_array, int num_keys,
size_t* filter_length);
unsigned char (*key_match_)(void*, const char* key, size_t length,
const char* filter, size_t filter_length);
virtual ~leveldb_filterpolicy_t() {
(*destructor_)(state_);
}
virtual ~leveldb_filterpolicy_t() { (*destructor_)(state_); }
virtual const char* Name() const {
return (*name_)(state_);
}
virtual const char* Name() const { return (*name_)(state_); }
virtual void CreateFilter(const Slice* keys, int n, std::string* dst) const {
std::vector<const char*> key_pointers(n);
@ -118,8 +131,8 @@ struct leveldb_filterpolicy_t : public FilterPolicy {
}
virtual bool KeyMayMatch(const Slice& key, const Slice& filter) const {
return (*key_match_)(state_, key.data(), key.size(),
filter.data(), filter.size());
return (*key_match_)(state_, key.data(), key.size(), filter.data(),
filter.size());
}
};
@ -148,10 +161,8 @@ static char* CopyString(const std::string& str) {
return result;
}
leveldb_t* leveldb_open(
const leveldb_options_t* options,
const char* name,
char** errptr) {
leveldb_t* leveldb_open(const leveldb_options_t* options, const char* name,
char** errptr) {
DB* db;
if (SaveError(errptr, DB::Open(options->rep, std::string(name), &db))) {
return nullptr;
@ -166,39 +177,26 @@ void leveldb_close(leveldb_t* db) {
delete db;
}
void leveldb_put(
leveldb_t* db,
const leveldb_writeoptions_t* options,
const char* key, size_t keylen,
const char* val, size_t vallen,
char** errptr) {
void leveldb_put(leveldb_t* db, const leveldb_writeoptions_t* options,
const char* key, size_t keylen, const char* val, size_t vallen,
char** errptr) {
SaveError(errptr,
db->rep->Put(options->rep, Slice(key, keylen), Slice(val, vallen)));
}
void leveldb_delete(
leveldb_t* db,
const leveldb_writeoptions_t* options,
const char* key, size_t keylen,
char** errptr) {
void leveldb_delete(leveldb_t* db, const leveldb_writeoptions_t* options,
const char* key, size_t keylen, char** errptr) {
SaveError(errptr, db->rep->Delete(options->rep, Slice(key, keylen)));
}
void leveldb_write(
leveldb_t* db,
const leveldb_writeoptions_t* options,
leveldb_writebatch_t* batch,
char** errptr) {
void leveldb_write(leveldb_t* db, const leveldb_writeoptions_t* options,
leveldb_writebatch_t* batch, char** errptr) {
SaveError(errptr, db->rep->Write(options->rep, &batch->rep));
}
char* leveldb_get(
leveldb_t* db,
const leveldb_readoptions_t* options,
const char* key, size_t keylen,
size_t* vallen,
char** errptr) {
char* leveldb_get(leveldb_t* db, const leveldb_readoptions_t* options,
const char* key, size_t keylen, size_t* vallen,
char** errptr) {
char* result = nullptr;
std::string tmp;
Status s = db->rep->Get(options->rep, Slice(key, keylen), &tmp);
@ -215,30 +213,25 @@ char* leveldb_get(
}
leveldb_iterator_t* leveldb_create_iterator(
leveldb_t* db,
const leveldb_readoptions_t* options) {
leveldb_t* db, const leveldb_readoptions_t* options) {
leveldb_iterator_t* result = new leveldb_iterator_t;
result->rep = db->rep->NewIterator(options->rep);
return result;
}
const leveldb_snapshot_t* leveldb_create_snapshot(
leveldb_t* db) {
const leveldb_snapshot_t* leveldb_create_snapshot(leveldb_t* db) {
leveldb_snapshot_t* result = new leveldb_snapshot_t;
result->rep = db->rep->GetSnapshot();
return result;
}
void leveldb_release_snapshot(
leveldb_t* db,
const leveldb_snapshot_t* snapshot) {
void leveldb_release_snapshot(leveldb_t* db,
const leveldb_snapshot_t* snapshot) {
db->rep->ReleaseSnapshot(snapshot->rep);
delete snapshot;
}
char* leveldb_property_value(
leveldb_t* db,
const char* propname) {
char* leveldb_property_value(leveldb_t* db, const char* propname) {
std::string tmp;
if (db->rep->GetProperty(Slice(propname), &tmp)) {
// We use strdup() since we expect human readable output.
@ -248,12 +241,12 @@ char* leveldb_property_value(
}
}
void leveldb_approximate_sizes(
leveldb_t* db,
int num_ranges,
const char* const* range_start_key, const size_t* range_start_key_len,
const char* const* range_limit_key, const size_t* range_limit_key_len,
uint64_t* sizes) {
void leveldb_approximate_sizes(leveldb_t* db, int num_ranges,
const char* const* range_start_key,
const size_t* range_start_key_len,
const char* const* range_limit_key,
const size_t* range_limit_key_len,
uint64_t* sizes) {
Range* ranges = new Range[num_ranges];
for (int i = 0; i < num_ranges; i++) {
ranges[i].start = Slice(range_start_key[i], range_start_key_len[i]);
@ -263,10 +256,9 @@ void leveldb_approximate_sizes(
delete[] ranges;
}
void leveldb_compact_range(
leveldb_t* db,
const char* start_key, size_t start_key_len,
const char* limit_key, size_t limit_key_len) {
void leveldb_compact_range(leveldb_t* db, const char* start_key,
size_t start_key_len, const char* limit_key,
size_t limit_key_len) {
Slice a, b;
db->rep->CompactRange(
// Pass null Slice if corresponding "const char*" is null
@ -274,17 +266,13 @@ void leveldb_compact_range(
(limit_key ? (b = Slice(limit_key, limit_key_len), &b) : nullptr));
}
void leveldb_destroy_db(
const leveldb_options_t* options,
const char* name,
char** errptr) {
void leveldb_destroy_db(const leveldb_options_t* options, const char* name,
char** errptr) {
SaveError(errptr, DestroyDB(name, options->rep));
}
void leveldb_repair_db(
const leveldb_options_t* options,
const char* name,
char** errptr) {
void leveldb_repair_db(const leveldb_options_t* options, const char* name,
char** errptr) {
SaveError(errptr, RepairDB(name, options->rep));
}
@ -309,13 +297,9 @@ void leveldb_iter_seek(leveldb_iterator_t* iter, const char* k, size_t klen) {
iter->rep->Seek(Slice(k, klen));
}
void leveldb_iter_next(leveldb_iterator_t* iter) {
iter->rep->Next();
}
void leveldb_iter_next(leveldb_iterator_t* iter) { iter->rep->Next(); }
void leveldb_iter_prev(leveldb_iterator_t* iter) {
iter->rep->Prev();
}
void leveldb_iter_prev(leveldb_iterator_t* iter) { iter->rep->Prev(); }
const char* leveldb_iter_key(const leveldb_iterator_t* iter, size_t* klen) {
Slice s = iter->rep->key();
@ -337,32 +321,25 @@ leveldb_writebatch_t* leveldb_writebatch_create() {
return new leveldb_writebatch_t;
}
void leveldb_writebatch_destroy(leveldb_writebatch_t* b) {
delete b;
}
void leveldb_writebatch_destroy(leveldb_writebatch_t* b) { delete b; }
void leveldb_writebatch_clear(leveldb_writebatch_t* b) {
b->rep.Clear();
}
void leveldb_writebatch_clear(leveldb_writebatch_t* b) { b->rep.Clear(); }
void leveldb_writebatch_put(
leveldb_writebatch_t* b,
const char* key, size_t klen,
const char* val, size_t vlen) {
void leveldb_writebatch_put(leveldb_writebatch_t* b, const char* key,
size_t klen, const char* val, size_t vlen) {
b->rep.Put(Slice(key, klen), Slice(val, vlen));
}
void leveldb_writebatch_delete(
leveldb_writebatch_t* b,
const char* key, size_t klen) {
void leveldb_writebatch_delete(leveldb_writebatch_t* b, const char* key,
size_t klen) {
b->rep.Delete(Slice(key, klen));
}
void leveldb_writebatch_iterate(
const leveldb_writebatch_t* b,
void* state,
void (*put)(void*, const char* k, size_t klen, const char* v, size_t vlen),
void (*deleted)(void*, const char* k, size_t klen)) {
void leveldb_writebatch_iterate(const leveldb_writebatch_t* b, void* state,
void (*put)(void*, const char* k, size_t klen,
const char* v, size_t vlen),
void (*deleted)(void*, const char* k,
size_t klen)) {
class H : public WriteBatch::Handler {
public:
void* state_;
@ -382,43 +359,37 @@ void leveldb_writebatch_iterate(
b->rep.Iterate(&handler);
}
void leveldb_writebatch_append(leveldb_writebatch_t *destination,
const leveldb_writebatch_t *source) {
void leveldb_writebatch_append(leveldb_writebatch_t* destination,
const leveldb_writebatch_t* source) {
destination->rep.Append(source->rep);
}
leveldb_options_t* leveldb_options_create() {
return new leveldb_options_t;
}
leveldb_options_t* leveldb_options_create() { return new leveldb_options_t; }
void leveldb_options_destroy(leveldb_options_t* options) {
delete options;
}
void leveldb_options_destroy(leveldb_options_t* options) { delete options; }
void leveldb_options_set_comparator(
leveldb_options_t* opt,
leveldb_comparator_t* cmp) {
void leveldb_options_set_comparator(leveldb_options_t* opt,
leveldb_comparator_t* cmp) {
opt->rep.comparator = cmp;
}
void leveldb_options_set_filter_policy(
leveldb_options_t* opt,
leveldb_filterpolicy_t* policy) {
void leveldb_options_set_filter_policy(leveldb_options_t* opt,
leveldb_filterpolicy_t* policy) {
opt->rep.filter_policy = policy;
}
void leveldb_options_set_create_if_missing(
leveldb_options_t* opt, unsigned char v) {
void leveldb_options_set_create_if_missing(leveldb_options_t* opt,
unsigned char v) {
opt->rep.create_if_missing = v;
}
void leveldb_options_set_error_if_exists(
leveldb_options_t* opt, unsigned char v) {
void leveldb_options_set_error_if_exists(leveldb_options_t* opt,
unsigned char v) {
opt->rep.error_if_exists = v;
}
void leveldb_options_set_paranoid_checks(
leveldb_options_t* opt, unsigned char v) {
void leveldb_options_set_paranoid_checks(leveldb_options_t* opt,
unsigned char v) {
opt->rep.paranoid_checks = v;
}
@ -459,12 +430,9 @@ void leveldb_options_set_compression(leveldb_options_t* opt, int t) {
}
leveldb_comparator_t* leveldb_comparator_create(
void* state,
void (*destructor)(void*),
int (*compare)(
void*,
const char* a, size_t alen,
const char* b, size_t blen),
void* state, void (*destructor)(void*),
int (*compare)(void*, const char* a, size_t alen, const char* b,
size_t blen),
const char* (*name)(void*)) {
leveldb_comparator_t* result = new leveldb_comparator_t;
result->state_ = state;
@ -474,22 +442,15 @@ leveldb_comparator_t* leveldb_comparator_create(
return result;
}
void leveldb_comparator_destroy(leveldb_comparator_t* cmp) {
delete cmp;
}
void leveldb_comparator_destroy(leveldb_comparator_t* cmp) { delete cmp; }
leveldb_filterpolicy_t* leveldb_filterpolicy_create(
void* state,
void (*destructor)(void*),
char* (*create_filter)(
void*,
const char* const* key_array, const size_t* key_length_array,
int num_keys,
size_t* filter_length),
unsigned char (*key_may_match)(
void*,
const char* key, size_t length,
const char* filter, size_t filter_length),
void* state, void (*destructor)(void*),
char* (*create_filter)(void*, const char* const* key_array,
const size_t* key_length_array, int num_keys,
size_t* filter_length),
unsigned char (*key_may_match)(void*, const char* key, size_t length,
const char* filter, size_t filter_length),
const char* (*name)(void*)) {
leveldb_filterpolicy_t* result = new leveldb_filterpolicy_t;
result->state_ = state;
@ -518,7 +479,7 @@ leveldb_filterpolicy_t* leveldb_filterpolicy_create_bloom(int bits_per_key) {
bool KeyMayMatch(const Slice& key, const Slice& filter) const {
return rep_->KeyMayMatch(key, filter);
}
static void DoNothing(void*) { }
static void DoNothing(void*) {}
};
Wrapper* wrapper = new Wrapper;
wrapper->rep_ = NewBloomFilterPolicy(bits_per_key);
@ -531,24 +492,20 @@ leveldb_readoptions_t* leveldb_readoptions_create() {
return new leveldb_readoptions_t;
}
void leveldb_readoptions_destroy(leveldb_readoptions_t* opt) {
delete opt;
}
void leveldb_readoptions_destroy(leveldb_readoptions_t* opt) { delete opt; }
void leveldb_readoptions_set_verify_checksums(
leveldb_readoptions_t* opt,
unsigned char v) {
void leveldb_readoptions_set_verify_checksums(leveldb_readoptions_t* opt,
unsigned char v) {
opt->rep.verify_checksums = v;
}
void leveldb_readoptions_set_fill_cache(
leveldb_readoptions_t* opt, unsigned char v) {
void leveldb_readoptions_set_fill_cache(leveldb_readoptions_t* opt,
unsigned char v) {
opt->rep.fill_cache = v;
}
void leveldb_readoptions_set_snapshot(
leveldb_readoptions_t* opt,
const leveldb_snapshot_t* snap) {
void leveldb_readoptions_set_snapshot(leveldb_readoptions_t* opt,
const leveldb_snapshot_t* snap) {
opt->rep.snapshot = (snap ? snap->rep : nullptr);
}
@ -556,12 +513,10 @@ leveldb_writeoptions_t* leveldb_writeoptions_create() {
return new leveldb_writeoptions_t;
}
void leveldb_writeoptions_destroy(leveldb_writeoptions_t* opt) {
delete opt;
}
void leveldb_writeoptions_destroy(leveldb_writeoptions_t* opt) { delete opt; }
void leveldb_writeoptions_set_sync(
leveldb_writeoptions_t* opt, unsigned char v) {
void leveldb_writeoptions_set_sync(leveldb_writeoptions_t* opt,
unsigned char v) {
opt->rep.sync = v;
}
@ -600,16 +555,10 @@ char* leveldb_env_get_test_directory(leveldb_env_t* env) {
return buffer;
}
void leveldb_free(void* ptr) {
free(ptr);
}
void leveldb_free(void* ptr) { free(ptr); }
int leveldb_major_version() {
return kMajorVersion;
}
int leveldb_major_version() { return kMajorVersion; }
int leveldb_minor_version() {
return kMinorVersion;
}
int leveldb_minor_version() { return kMinorVersion; }
} // end extern "C"

32
db/corruption_test.cc
View File

@ -2,16 +2,16 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "leveldb/db.h"
#include <sys/types.h>
#include "leveldb/cache.h"
#include "leveldb/table.h"
#include "leveldb/write_batch.h"
#include "db/db_impl.h"
#include "db/filename.h"
#include "db/log_format.h"
#include "db/version_set.h"
#include "leveldb/cache.h"
#include "leveldb/db.h"
#include "leveldb/table.h"
#include "leveldb/write_batch.h"
#include "util/logging.h"
#include "util/testharness.h"
#include "util/testutil.h"
@ -42,8 +42,8 @@ class CorruptionTest {
}
~CorruptionTest() {
delete db_;
delete tiny_cache_;
delete db_;
delete tiny_cache_;
}
Status TryReopen() {
@ -52,9 +52,7 @@ class CorruptionTest {
return DB::Open(options_, dbname_, &db_);
}
void Reopen() {
ASSERT_OK(TryReopen());
}
void Reopen() { ASSERT_OK(TryReopen()); }
void RepairDB() {
delete db_;
@ -66,7 +64,7 @@ class CorruptionTest {
std::string key_space, value_space;
WriteBatch batch;
for (int i = 0; i < n; i++) {
//if ((i % 100) == 0) fprintf(stderr, "@ %d of %d\n", i, n);
// if ((i % 100) == 0) fprintf(stderr, "@ %d of %d\n", i, n);
Slice key = Key(i, &key_space);
batch.Clear();
batch.Put(key, Value(i, &value_space));
@ -95,8 +93,7 @@ class CorruptionTest {
// Ignore boundary keys.
continue;
}
if (!ConsumeDecimalNumber(&in, &key) ||
!in.empty() ||
if (!ConsumeDecimalNumber(&in, &key) || !in.empty() ||
key < next_expected) {
bad_keys++;
continue;
@ -127,8 +124,7 @@ class CorruptionTest {
std::string fname;
int picked_number = -1;
for (size_t i = 0; i < filenames.size(); i++) {
if (ParseFileName(filenames[i], &number, &type) &&
type == filetype &&
if (ParseFileName(filenames[i], &number, &type) && type == filetype &&
int(number) > picked_number) { // Pick latest file
fname = dbname_ + "/" + filenames[i];
picked_number = number;
@ -194,7 +190,7 @@ class CorruptionTest {
TEST(CorruptionTest, Recovery) {
Build(100);
Check(100, 100);
Corrupt(kLogFile, 19, 1); // WriteBatch tag for first record
Corrupt(kLogFile, 19, 1); // WriteBatch tag for first record
Corrupt(kLogFile, log::kBlockSize + 1000, 1); // Somewhere in second block
Reopen();
@ -361,6 +357,4 @@ TEST(CorruptionTest, UnrelatedKeys) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

124
db/db_bench.cc
View File

@ -2,9 +2,10 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include "leveldb/cache.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
@ -55,8 +56,7 @@ static const char* FLAGS_benchmarks =
"fill100K,"
"crc32c,"
"snappycomp,"
"snappyuncomp,"
;
"snappyuncomp,";
// Number of key/values to place in database
static int FLAGS_num = 1000000;
@ -155,7 +155,7 @@ static Slice TrimSpace(Slice s) {
start++;
}
size_t limit = s.size();
while (limit > start && isspace(s[limit-1])) {
while (limit > start && isspace(s[limit - 1])) {
limit--;
}
return Slice(s.data() + start, limit - start);
@ -214,9 +214,7 @@ class Stats {
seconds_ = (finish_ - start_) * 1e-6;
}
void AddMessage(Slice msg) {
AppendWithSpace(&message_, msg);
}
void AddMessage(Slice msg) { AppendWithSpace(&message_, msg); }
void FinishedSingleOp() {
if (FLAGS_histogram) {
@ -232,21 +230,26 @@ class Stats {
done_++;
if (done_ >= next_report_) {
if (next_report_ < 1000) next_report_ += 100;
else if (next_report_ < 5000) next_report_ += 500;
else if (next_report_ < 10000) next_report_ += 1000;
else if (next_report_ < 50000) next_report_ += 5000;
else if (next_report_ < 100000) next_report_ += 10000;
else if (next_report_ < 500000) next_report_ += 50000;
else next_report_ += 100000;
if (next_report_ < 1000)
next_report_ += 100;
else if (next_report_ < 5000)
next_report_ += 500;
else if (next_report_ < 10000)
next_report_ += 1000;
else if (next_report_ < 50000)
next_report_ += 5000;
else if (next_report_ < 100000)
next_report_ += 10000;
else if (next_report_ < 500000)
next_report_ += 50000;
else
next_report_ += 100000;
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
fflush(stderr);
}
}
void AddBytes(int64_t n) {
bytes_ += n;
}
void AddBytes(int64_t n) { bytes_ += n; }
void Report(const Slice& name) {
// Pretend at least one op was done in case we are running a benchmark
@ -265,11 +268,8 @@ class Stats {
}
AppendWithSpace(&extra, message_);
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
name.ToString().c_str(),
seconds_ * 1e6 / done_,
(extra.empty() ? "" : " "),
extra.c_str());
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", name.ToString().c_str(),
seconds_ * 1e6 / done_, (extra.empty() ? "" : " "), extra.c_str());
if (FLAGS_histogram) {
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
}
@ -294,13 +294,13 @@ struct SharedState {
bool start GUARDED_BY(mu);
SharedState(int total)
: cv(&mu), total(total), num_initialized(0), num_done(0), start(false) { }
: cv(&mu), total(total), num_initialized(0), num_done(0), start(false) {}
};
// Per-thread state for concurrent executions of the same benchmark.
struct ThreadState {
int tid; // 0..n-1 when running in n threads
Random rand; // Has different seeds for different threads
int tid; // 0..n-1 when running in n threads
Random rand; // Has different seeds for different threads
Stats stats;
SharedState* shared;
@ -330,20 +330,20 @@ class Benchmark {
static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
fprintf(stdout, "Entries: %d\n", num_);
fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_)
/ 1048576.0));
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
fprintf(stdout, "FileSize: %.1f MB (estimated)\n",
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_)
/ 1048576.0));
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
1048576.0));
PrintWarnings();
fprintf(stdout, "------------------------------------------------\n");
}
void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
fprintf(stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n"
);
fprintf(
stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
fprintf(stdout,
@ -361,8 +361,8 @@ class Benchmark {
}
void PrintEnvironment() {
fprintf(stderr, "LevelDB: version %d.%d\n",
kMajorVersion, kMinorVersion);
fprintf(stderr, "LevelDB: version %d.%d\n", kMajorVersion,
kMinorVersion);
#if defined(__linux)
time_t now = time(nullptr);
@ -397,16 +397,16 @@ class Benchmark {
public:
Benchmark()
: cache_(FLAGS_cache_size >= 0 ? NewLRUCache(FLAGS_cache_size) : nullptr),
filter_policy_(FLAGS_bloom_bits >= 0
? NewBloomFilterPolicy(FLAGS_bloom_bits)
: nullptr),
db_(nullptr),
num_(FLAGS_num),
value_size_(FLAGS_value_size),
entries_per_batch_(1),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
heap_counter_(0) {
: cache_(FLAGS_cache_size >= 0 ? NewLRUCache(FLAGS_cache_size) : nullptr),
filter_policy_(FLAGS_bloom_bits >= 0
? NewBloomFilterPolicy(FLAGS_bloom_bits)
: nullptr),
db_(nullptr),
num_(FLAGS_num),
value_size_(FLAGS_value_size),
entries_per_batch_(1),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
heap_counter_(0) {
std::vector<std::string> files;
g_env->GetChildren(FLAGS_db, &files);
for (size_t i = 0; i < files.size(); i++) {
@ -516,7 +516,7 @@ class Benchmark {
} else if (name == Slice("sstables")) {
PrintStats("leveldb.sstables");
} else {
if (name != Slice()) { // No error message for empty name
if (!name.empty()) { // No error message for empty name
fprintf(stderr, "unknown benchmark '%s'\n", name.ToString().c_str());
}
}
@ -665,8 +665,8 @@ class Benchmark {
int64_t bytes = 0;
char* uncompressed = new char[input.size()];
while (ok && bytes < 1024 * 1048576) { // Compress 1G
ok = port::Snappy_Uncompress(compressed.data(), compressed.size(),
uncompressed);
ok = port::Snappy_Uncompress(compressed.data(), compressed.size(),
uncompressed);
bytes += input.size();
thread->stats.FinishedSingleOp();
}
@ -706,13 +706,9 @@ class Benchmark {
}
}
void WriteSeq(ThreadState* thread) {
DoWrite(thread, true);
}
void WriteSeq(ThreadState* thread) { DoWrite(thread, true); }
void WriteRandom(ThreadState* thread) {
DoWrite(thread, false);
}
void WriteRandom(ThreadState* thread) { DoWrite(thread, false); }
void DoWrite(ThreadState* thread, bool seq) {
if (num_ != FLAGS_num) {
@ -728,7 +724,7 @@ class Benchmark {
for (int i = 0; i < num_; i += entries_per_batch_) {
batch.Clear();
for (int j = 0; j < entries_per_batch_; j++) {
const int k = seq ? i+j : (thread->rand.Next() % FLAGS_num);
const int k = seq ? i + j : (thread->rand.Next() % FLAGS_num);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
batch.Put(key, gen.Generate(value_size_));
@ -838,7 +834,7 @@ class Benchmark {
for (int i = 0; i < num_; i += entries_per_batch_) {
batch.Clear();
for (int j = 0; j < entries_per_batch_; j++) {
const int k = seq ? i+j : (thread->rand.Next() % FLAGS_num);
const int k = seq ? i + j : (thread->rand.Next() % FLAGS_num);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
batch.Delete(key);
@ -852,13 +848,9 @@ class Benchmark {
}
}
void DeleteSeq(ThreadState* thread) {
DoDelete(thread, true);
}
void DeleteSeq(ThreadState* thread) { DoDelete(thread, true); }
void DeleteRandom(ThreadState* thread) {
DoDelete(thread, false);
}
void DeleteRandom(ThreadState* thread) { DoDelete(thread, false); }
void ReadWhileWriting(ThreadState* thread) {
if (thread->tid > 0) {
@ -890,9 +882,7 @@ class Benchmark {
}
}
void Compact(ThreadState* thread) {
db_->CompactRange(nullptr, nullptr);
}
void Compact(ThreadState* thread) { db_->CompactRange(nullptr, nullptr); }
void PrintStats(const char* key) {
std::string stats;
@ -982,9 +972,9 @@ int main(int argc, char** argv) {
// Choose a location for the test database if none given with --db=<path>
if (FLAGS_db == nullptr) {
leveldb::g_env->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
leveldb::g_env->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
}
leveldb::Benchmark benchmark;

179
db/db_impl.cc
View File

@ -75,7 +75,7 @@ struct DBImpl::CompactionState {
uint64_t total_bytes;
Output* current_output() { return &outputs[outputs.size()-1]; }
Output* current_output() { return &outputs[outputs.size() - 1]; }
explicit CompactionState(Compaction* c)
: compaction(c),
@ -98,10 +98,10 @@ Options SanitizeOptions(const std::string& dbname,
Options result = src;
result.comparator = icmp;
result.filter_policy = (src.filter_policy != nullptr) ? ipolicy : nullptr;
ClipToRange(&result.max_open_files, 64 + kNumNonTableCacheFiles, 50000);
ClipToRange(&result.write_buffer_size, 64<<10, 1<<30);
ClipToRange(&result.max_file_size, 1<<20, 1<<30);
ClipToRange(&result.block_size, 1<<10, 4<<20);
ClipToRange(&result.max_open_files, 64 + kNumNonTableCacheFiles, 50000);
ClipToRange(&result.write_buffer_size, 64 << 10, 1 << 30);
ClipToRange(&result.max_file_size, 1 << 20, 1 << 30);
ClipToRange(&result.block_size, 1 << 10, 4 << 20);
if (result.info_log == nullptr) {
// Open a log file in the same directory as the db
src.env->CreateDir(dbname); // In case it does not exist
@ -268,8 +268,7 @@ void DBImpl::DeleteObsoleteFiles() {
if (type == kTableFile) {
table_cache_->Evict(number);
}
Log(options_.info_log, "Delete type=%d #%lld\n",
static_cast<int>(type),
Log(options_.info_log, "Delete type=%d #%lld\n", static_cast<int>(type),
static_cast<unsigned long long>(number));
env_->DeleteFile(dbname_ + "/" + filenames[i]);
}
@ -277,7 +276,7 @@ void DBImpl::DeleteObsoleteFiles() {
}
}
Status DBImpl::Recover(VersionEdit* edit, bool *save_manifest) {
Status DBImpl::Recover(VersionEdit* edit, bool* save_manifest) {
mutex_.AssertHeld();
// Ignore error from CreateDir since the creation of the DB is
@ -302,8 +301,8 @@ Status DBImpl::Recover(VersionEdit* edit, bool *save_manifest) {
}
} else {
if (options_.error_if_exists) {
return Status::InvalidArgument(
dbname_, "exists (error_if_exists is true)");
return Status::InvalidArgument(dbname_,
"exists (error_if_exists is true)");
}
}
@ -378,8 +377,8 @@ Status DBImpl::RecoverLogFile(uint64_t log_number, bool last_log,
Status* status; // null if options_.paranoid_checks==false
virtual void Corruption(size_t bytes, const Status& s) {
Log(info_log, "%s%s: dropping %d bytes; %s",
(this->status == nullptr ? "(ignoring error) " : ""),
fname, static_cast<int>(bytes), s.ToString().c_str());
(this->status == nullptr ? "(ignoring error) " : ""), fname,
static_cast<int>(bytes), s.ToString().c_str());
if (this->status != nullptr && this->status->ok()) *this->status = s;
}
};
@ -405,10 +404,9 @@ Status DBImpl::RecoverLogFile(uint64_t log_number, bool last_log,
// paranoid_checks==false so that corruptions cause entire commits
// to be skipped instead of propagating bad information (like overly
// large sequence numbers).
log::Reader reader(file, &reporter, true/*checksum*/,
0/*initial_offset*/);
log::Reader reader(file, &reporter, true /*checksum*/, 0 /*initial_offset*/);
Log(options_.info_log, "Recovering log #%llu",
(unsigned long long) log_number);
(unsigned long long)log_number);
// Read all the records and add to a memtable
std::string scratch;
@ -416,11 +414,10 @@ Status DBImpl::RecoverLogFile(uint64_t log_number, bool last_log,
WriteBatch batch;
int compactions = 0;
MemTable* mem = nullptr;
while (reader.ReadRecord(&record, &scratch) &&
status.ok()) {
while (reader.ReadRecord(&record, &scratch) && status.ok()) {
if (record.size() < 12) {
reporter.Corruption(
record.size(), Status::Corruption("log record too small"));
reporter.Corruption(record.size(),
Status::Corruption("log record too small"));
continue;
}
WriteBatchInternal::SetContents(&batch, record);
@ -434,9 +431,8 @@ Status DBImpl::RecoverLogFile(uint64_t log_number, bool last_log,
if (!status.ok()) {
break;
}
const SequenceNumber last_seq =
WriteBatchInternal::Sequence(&batch) +
WriteBatchInternal::Count(&batch) - 1;
const SequenceNumber last_seq = WriteBatchInternal::Sequence(&batch) +
WriteBatchInternal::Count(&batch) - 1;
if (last_seq > *max_sequence) {
*max_sequence = last_seq;
}
@ -500,7 +496,7 @@ Status DBImpl::WriteLevel0Table(MemTable* mem, VersionEdit* edit,
pending_outputs_.insert(meta.number);
Iterator* iter = mem->NewIterator();
Log(options_.info_log, "Level-0 table #%llu: started",
(unsigned long long) meta.number);
(unsigned long long)meta.number);
Status s;
{
@ -510,13 +506,11 @@ Status DBImpl::WriteLevel0Table(MemTable* mem, VersionEdit* edit,
}
Log(options_.info_log, "Level-0 table #%llu: %lld bytes %s",
(unsigned long long) meta.number,
(unsigned long long) meta.file_size,
(unsigned long long)meta.number, (unsigned long long)meta.file_size,
s.ToString().c_str());
delete iter;
pending_outputs_.erase(meta.number);
// Note that if file_size is zero, the file has been deleted and
// should not be added to the manifest.
int level = 0;
@ -526,8 +520,8 @@ Status DBImpl::WriteLevel0Table(MemTable* mem, VersionEdit* edit,
if (base != nullptr) {
level = base->PickLevelForMemTableOutput(min_user_key, max_user_key);
}
edit->AddFile(level, meta.number, meta.file_size,
meta.smallest, meta.largest);
edit->AddFile(level, meta.number, meta.file_size, meta.smallest,
meta.largest);
}
CompactionStats stats;
@ -658,8 +652,7 @@ void DBImpl::MaybeScheduleCompaction() {
// DB is being deleted; no more background compactions
} else if (!bg_error_.ok()) {
// Already got an error; no more changes
} else if (imm_ == nullptr &&
manual_compaction_ == nullptr &&
} else if (imm_ == nullptr && manual_compaction_ == nullptr &&
!versions_->NeedsCompaction()) {
// No work to be done
} else {
@ -711,8 +704,7 @@ void DBImpl::BackgroundCompaction() {
}
Log(options_.info_log,
"Manual compaction at level-%d from %s .. %s; will stop at %s\n",
m->level,
(m->begin ? m->begin->DebugString().c_str() : "(begin)"),
m->level, (m->begin ? m->begin->DebugString().c_str() : "(begin)"),
(m->end ? m->end->DebugString().c_str() : "(end)"),
(m->done ? "(end)" : manual_end.DebugString().c_str()));
} else {
@ -727,19 +719,17 @@ void DBImpl::BackgroundCompaction() {
assert(c->num_input_files(0) == 1);
FileMetaData* f = c->input(0, 0);
c->edit()->DeleteFile(c->level(), f->number);
c->edit()->AddFile(c->level() + 1, f->number, f->file_size,
f->smallest, f->largest);
c->edit()->AddFile(c->level() + 1, f->number, f->file_size, f->smallest,
f->largest);
status = versions_->LogAndApply(c->edit(), &mutex_);
if (!status.ok()) {
RecordBackgroundError(status);
}
VersionSet::LevelSummaryStorage tmp;
Log(options_.info_log, "Moved #%lld to level-%d %lld bytes %s: %s\n",
static_cast<unsigned long long>(f->number),
c->level() + 1,
static_cast<unsigned long long>(f->number), c->level() + 1,
static_cast<unsigned long long>(f->file_size),
status.ToString().c_str(),
versions_->LevelSummary(&tmp));
status.ToString().c_str(), versions_->LevelSummary(&tmp));
} else {
CompactionState* compact = new CompactionState(c);
status = DoCompactionWork(compact);
@ -757,8 +747,7 @@ void DBImpl::BackgroundCompaction() {
} else if (shutting_down_.load(std::memory_order_acquire)) {
// Ignore compaction errors found during shutting down
} else {
Log(options_.info_log,
"Compaction error: %s", status.ToString().c_str());
Log(options_.info_log, "Compaction error: %s", status.ToString().c_str());
}
if (is_manual) {
@ -853,31 +842,25 @@ Status DBImpl::FinishCompactionOutputFile(CompactionState* compact,
if (s.ok() && current_entries > 0) {
// Verify that the table is usable
Iterator* iter = table_cache_->NewIterator(ReadOptions(),
output_number,
current_bytes);
Iterator* iter =
table_cache_->NewIterator(ReadOptions(), output_number, current_bytes);
s = iter->status();
delete iter;
if (s.ok()) {
Log(options_.info_log,
"Generated table #%llu@%d: %lld keys, %lld bytes",
(unsigned long long) output_number,
compact->compaction->level(),
(unsigned long long) current_entries,
(unsigned long long) current_bytes);
Log(options_.info_log, "Generated table #%llu@%d: %lld keys, %lld bytes",
(unsigned long long)output_number, compact->compaction->level(),
(unsigned long long)current_entries,
(unsigned long long)current_bytes);
}
}
return s;
}
Status DBImpl::InstallCompactionResults(CompactionState* compact) {
mutex_.AssertHeld();
Log(options_.info_log, "Compacted %d@%d + %d@%d files => %lld bytes",
compact->compaction->num_input_files(0),
compact->compaction->level(),
compact->compaction->num_input_files(1),
compact->compaction->level() + 1,
Log(options_.info_log, "Compacted %d@%d + %d@%d files => %lld bytes",
compact->compaction->num_input_files(0), compact->compaction->level(),
compact->compaction->num_input_files(1), compact->compaction->level() + 1,
static_cast<long long>(compact->total_bytes));
// Add compaction outputs
@ -885,9 +868,8 @@ Status DBImpl::InstallCompactionResults(CompactionState* compact) {
const int level = compact->compaction->level();
for (size_t i = 0; i < compact->outputs.size(); i++) {
const CompactionState::Output& out = compact->outputs[i];
compact->compaction->edit()->AddFile(
level + 1,
out.number, out.file_size, out.smallest, out.largest);
compact->compaction->edit()->AddFile(level + 1, out.number, out.file_size,
out.smallest, out.largest);
}
return versions_->LogAndApply(compact->compaction->edit(), &mutex_);
}
@ -896,9 +878,8 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
const uint64_t start_micros = env_->NowMicros();
int64_t imm_micros = 0; // Micros spent doing imm_ compactions
Log(options_.info_log, "Compacting %d@%d + %d@%d files",
compact->compaction->num_input_files(0),
compact->compaction->level(),
Log(options_.info_log, "Compacting %d@%d + %d@%d files",
compact->compaction->num_input_files(0), compact->compaction->level(),
compact->compaction->num_input_files(1),
compact->compaction->level() + 1);
@ -921,7 +902,7 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
std::string current_user_key;
bool has_current_user_key = false;
SequenceNumber last_sequence_for_key = kMaxSequenceNumber;
for (; input->Valid() && !shutting_down_.load(std::memory_order_acquire); ) {
for (; input->Valid() && !shutting_down_.load(std::memory_order_acquire);) {
// Prioritize immutable compaction work
if (has_imm_.load(std::memory_order_relaxed)) {
const uint64_t imm_start = env_->NowMicros();
@ -953,8 +934,8 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
last_sequence_for_key = kMaxSequenceNumber;
} else {
if (!has_current_user_key ||
user_comparator()->Compare(ikey.user_key,
Slice(current_user_key)) != 0) {
user_comparator()->Compare(ikey.user_key, Slice(current_user_key)) !=
0) {
// First occurrence of this user key
current_user_key.assign(ikey.user_key.data(), ikey.user_key.size());
has_current_user_key = true;
@ -963,7 +944,7 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
if (last_sequence_for_key <= compact->smallest_snapshot) {
// Hidden by an newer entry for same user key
drop = true; // (A)
drop = true; // (A)
} else if (ikey.type == kTypeDeletion &&
ikey.sequence <= compact->smallest_snapshot &&
compact->compaction->IsBaseLevelForKey(ikey.user_key)) {
@ -1049,8 +1030,7 @@ Status DBImpl::DoCompactionWork(CompactionState* compact) {
RecordBackgroundError(status);
}
VersionSet::LevelSummaryStorage tmp;
Log(options_.info_log,
"compacted to: %s", versions_->LevelSummary(&tmp));
Log(options_.info_log, "compacted to: %s", versions_->LevelSummary(&tmp));
return status;
}
@ -1063,7 +1043,7 @@ struct IterState {
MemTable* const imm GUARDED_BY(mu);
IterState(port::Mutex* mutex, MemTable* mem, MemTable* imm, Version* version)
: mu(mutex), version(version), mem(mem), imm(imm) { }
: mu(mutex), version(version), mem(mem), imm(imm) {}
};
static void CleanupIteratorState(void* arg1, void* arg2) {
@ -1116,8 +1096,7 @@ int64_t DBImpl::TEST_MaxNextLevelOverlappingBytes() {
return versions_->MaxNextLevelOverlappingBytes();
}
Status DBImpl::Get(const ReadOptions& options,
const Slice& key,
Status DBImpl::Get(const ReadOptions& options, const Slice& key,
std::string* value) {
Status s;
MutexLock l(&mutex_);
@ -1168,12 +1147,12 @@ Iterator* DBImpl::NewIterator(const ReadOptions& options) {
SequenceNumber latest_snapshot;
uint32_t seed;
Iterator* iter = NewInternalIterator(options, &latest_snapshot, &seed);
return NewDBIterator(
this, user_comparator(), iter,
(options.snapshot != nullptr
? static_cast<const SnapshotImpl*>(options.snapshot)->sequence_number()
: latest_snapshot),
seed);
return NewDBIterator(this, user_comparator(), iter,
(options.snapshot != nullptr
? static_cast<const SnapshotImpl*>(options.snapshot)
->sequence_number()
: latest_snapshot),
seed);
}
void DBImpl::RecordReadSample(Slice key) {
@ -1202,9 +1181,9 @@ Status DBImpl::Delete(const WriteOptions& options, const Slice& key) {
return DB::Delete(options, key);
}
Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
Status DBImpl::Write(const WriteOptions& options, WriteBatch* updates) {
Writer w(&mutex_);
w.batch = my_batch;
w.batch = updates;
w.sync = options.sync;
w.done = false;
@ -1218,10 +1197,10 @@ Status DBImpl::Write(const WriteOptions& options, WriteBatch* my_batch) {
}
// May temporarily unlock and wait.
Status status = MakeRoomForWrite(my_batch == nullptr);
Status status = MakeRoomForWrite(updates == nullptr);
uint64_t last_sequence = versions_->LastSequence();
Writer* last_writer = &w;
if (status.ok() && my_batch != nullptr) { // nullptr batch is for compactions
if (status.ok() && updates != nullptr) { // nullptr batch is for compactions
WriteBatch* updates = BuildBatchGroup(&last_writer);
WriteBatchInternal::SetSequence(updates, last_sequence + 1);
last_sequence += WriteBatchInternal::Count(updates);
@ -1290,8 +1269,8 @@ WriteBatch* DBImpl::BuildBatchGroup(Writer** last_writer) {
// original write is small, limit the growth so we do not slow
// down the small write too much.
size_t max_size = 1 << 20;
if (size <= (128<<10)) {
max_size = size + (128<<10);
if (size <= (128 << 10)) {
max_size = size + (128 << 10);
}
*last_writer = first;
@ -1337,9 +1316,8 @@ Status DBImpl::MakeRoomForWrite(bool force) {
// Yield previous error
s = bg_error_;
break;
} else if (
allow_delay &&
versions_->NumLevelFiles(0) >= config::kL0_SlowdownWritesTrigger) {
} else if (allow_delay && versions_->NumLevelFiles(0) >=
config::kL0_SlowdownWritesTrigger) {
// We are getting close to hitting a hard limit on the number of
// L0 files. Rather than delaying a single write by several
// seconds when we hit the hard limit, start delaying each
@ -1383,7 +1361,7 @@ Status DBImpl::MakeRoomForWrite(bool force) {
has_imm_.store(true, std::memory_order_release);
mem_ = new MemTable(internal_comparator_);
mem_->Ref();
force = false; // Do not force another compaction if have room
force = false; // Do not force another compaction if have room
MaybeScheduleCompaction();
}
}
@ -1417,21 +1395,16 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
snprintf(buf, sizeof(buf),
" Compactions\n"
"Level Files Size(MB) Time(sec) Read(MB) Write(MB)\n"
"--------------------------------------------------\n"
);
"--------------------------------------------------\n");
value->append(buf);
for (int level = 0; level < config::kNumLevels; level++) {
int files = versions_->NumLevelFiles(level);
if (stats_[level].micros > 0 || files > 0) {
snprintf(
buf, sizeof(buf),
"%3d %8d %8.0f %9.0f %8.0f %9.0f\n",
level,
files,
versions_->NumLevelBytes(level) / 1048576.0,
stats_[level].micros / 1e6,
stats_[level].bytes_read / 1048576.0,
stats_[level].bytes_written / 1048576.0);
snprintf(buf, sizeof(buf), "%3d %8d %8.0f %9.0f %8.0f %9.0f\n", level,
files, versions_->NumLevelBytes(level) / 1048576.0,
stats_[level].micros / 1e6,
stats_[level].bytes_read / 1048576.0,
stats_[level].bytes_written / 1048576.0);
value->append(buf);
}
}
@ -1457,9 +1430,7 @@ bool DBImpl::GetProperty(const Slice& property, std::string* value) {
return false;
}
void DBImpl::GetApproximateSizes(
const Range* range, int n,
uint64_t* sizes) {
void DBImpl::GetApproximateSizes(const Range* range, int n, uint64_t* sizes) {
// TODO(opt): better implementation
Version* v;
{
@ -1497,10 +1468,9 @@ Status DB::Delete(const WriteOptions& opt, const Slice& key) {
return Write(opt, &batch);
}
DB::~DB() { }
DB::~DB() {}
Status DB::Open(const Options& options, const std::string& dbname,
DB** dbptr) {
Status DB::Open(const Options& options, const std::string& dbname, DB** dbptr) {
*dbptr = nullptr;
DBImpl* impl = new DBImpl(options, dbname);
@ -1543,8 +1513,7 @@ Status DB::Open(const Options& options, const std::string& dbname,
return s;
}
Snapshot::~Snapshot() {
}
Snapshot::~Snapshot() {}
Status DestroyDB(const std::string& dbname, const Options& options) {
Env* env = options.env;

11
db/db_impl.h
View File

@ -35,8 +35,7 @@ class DBImpl : public DB {
virtual Status Put(const WriteOptions&, const Slice& key, const Slice& value);
virtual Status Delete(const WriteOptions&, const Slice& key);
virtual Status Write(const WriteOptions& options, WriteBatch* updates);
virtual Status Get(const ReadOptions& options,
const Slice& key,
virtual Status Get(const ReadOptions& options, const Slice& key,
std::string* value);
virtual Iterator* NewIterator(const ReadOptions&);
virtual const Snapshot* GetSnapshot();
@ -166,9 +165,9 @@ class DBImpl : public DB {
struct ManualCompaction {
int level;
bool done;
const InternalKey* begin; // null means beginning of key range
const InternalKey* end; // null means end of key range
InternalKey tmp_storage; // Used to keep track of compaction progress
const InternalKey* begin; // null means beginning of key range
const InternalKey* end; // null means end of key range
InternalKey tmp_storage; // Used to keep track of compaction progress
};
ManualCompaction* manual_compaction_ GUARDED_BY(mutex_);
@ -184,7 +183,7 @@ class DBImpl : public DB {
int64_t bytes_read;
int64_t bytes_written;
CompactionStats() : micros(0), bytes_read(0), bytes_written(0) { }
CompactionStats() : micros(0), bytes_read(0), bytes_written(0) {}
void Add(const CompactionStats& c) {
this->micros += c.micros;

39
db/db_iter.cc
View File

@ -4,9 +4,9 @@
#include "db/db_iter.h"
#include "db/filename.h"
#include "db/db_impl.h"
#include "db/dbformat.h"
#include "db/filename.h"
#include "leveldb/env.h"
#include "leveldb/iterator.h"
#include "port/port.h"
@ -36,17 +36,14 @@ namespace {
// combines multiple entries for the same userkey found in the DB
// representation into a single entry while accounting for sequence
// numbers, deletion markers, overwrites, etc.
class DBIter: public Iterator {
class DBIter : public Iterator {
public:
// Which direction is the iterator currently moving?
// (1) When moving forward, the internal iterator is positioned at
// the exact entry that yields this->key(), this->value()
// (2) When moving backwards, the internal iterator is positioned
// just before all entries whose user key == this->key().
enum Direction {
kForward,
kReverse
};
enum Direction { kForward, kReverse };
DBIter(DBImpl* db, const Comparator* cmp, Iterator* iter, SequenceNumber s,
uint32_t seed)
@ -57,11 +54,8 @@ class DBIter: public Iterator {
direction_(kForward),
valid_(false),
rnd_(seed),
bytes_until_read_sampling_(RandomCompactionPeriod()) {
}
virtual ~DBIter() {
delete iter_;
}
bytes_until_read_sampling_(RandomCompactionPeriod()) {}
virtual ~DBIter() { delete iter_; }
virtual bool Valid() const { return valid_; }
virtual Slice key() const {
assert(valid_);
@ -105,7 +99,7 @@ class DBIter: public Iterator {
// Picks the number of bytes that can be read until a compaction is scheduled.
size_t RandomCompactionPeriod() {
return rnd_.Uniform(2*config::kReadBytesPeriod);
return rnd_.Uniform(2 * config::kReadBytesPeriod);
}
DBImpl* db_;
@ -114,8 +108,8 @@ class DBIter: public Iterator {
SequenceNumber const sequence_;
Status status_;
std::string saved_key_; // == current key when direction_==kReverse
std::string saved_value_; // == current raw value when direction_==kReverse
std::string saved_key_; // == current key when direction_==kReverse
std::string saved_value_; // == current raw value when direction_==kReverse
Direction direction_;
bool valid_;
@ -221,8 +215,8 @@ void DBIter::Prev() {
ClearSavedValue();
return;
}
if (user_comparator_->Compare(ExtractUserKey(iter_->key()),
saved_key_) < 0) {
if (user_comparator_->Compare(ExtractUserKey(iter_->key()), saved_key_) <
0) {
break;
}
}
@ -278,8 +272,8 @@ void DBIter::Seek(const Slice& target) {
direction_ = kForward;
ClearSavedValue();
saved_key_.clear();
AppendInternalKey(
&saved_key_, ParsedInternalKey(target, sequence_, kValueTypeForSeek));
AppendInternalKey(&saved_key_,
ParsedInternalKey(target, sequence_, kValueTypeForSeek));
iter_->Seek(saved_key_);
if (iter_->Valid()) {
FindNextUserEntry(false, &saved_key_ /* temporary storage */);
@ -308,12 +302,9 @@ void DBIter::SeekToLast() {
} // anonymous namespace
Iterator* NewDBIterator(
DBImpl* db,
const Comparator* user_key_comparator,
Iterator* internal_iter,
SequenceNumber sequence,
uint32_t seed) {
Iterator* NewDBIterator(DBImpl* db, const Comparator* user_key_comparator,
Iterator* internal_iter, SequenceNumber sequence,
uint32_t seed) {
return new DBIter(db, user_key_comparator, internal_iter, sequence, seed);
}

9
db/db_iter.h
View File

@ -6,8 +6,9 @@
#define STORAGE_LEVELDB_DB_DB_ITER_H_
#include <stdint.h>
#include "leveldb/db.h"
#include "db/dbformat.h"
#include "leveldb/db.h"
namespace leveldb {
@ -16,10 +17,8 @@ class DBImpl;
// Return a new iterator that converts internal keys (yielded by
// "*internal_iter") that were live at the specified "sequence" number
// into appropriate user keys.
Iterator* NewDBIterator(DBImpl* db,
const Comparator* user_key_comparator,
Iterator* internal_iter,
SequenceNumber sequence,
Iterator* NewDBIterator(DBImpl* db, const Comparator* user_key_comparator,
Iterator* internal_iter, SequenceNumber sequence,
uint32_t seed);
} // namespace leveldb

241
db/db_test.cc
View File

@ -2,17 +2,18 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "leveldb/db.h"
#include <atomic>
#include <string>
#include "leveldb/db.h"
#include "leveldb/filter_policy.h"
#include "db/db_impl.h"
#include "db/filename.h"
#include "db/version_set.h"
#include "db/write_batch_internal.h"
#include "leveldb/cache.h"
#include "leveldb/env.h"
#include "leveldb/filter_policy.h"
#include "leveldb/table.h"
#include "port/port.h"
#include "port/thread_annotations.h"
@ -31,9 +32,9 @@ static std::string RandomString(Random* rnd, int len) {
}
static std::string RandomKey(Random* rnd) {
int len = (rnd->OneIn(3)
? 1 // Short sometimes to encourage collisions
: (rnd->OneIn(100) ? rnd->Skewed(10) : rnd->Uniform(10)));
int len =
(rnd->OneIn(3) ? 1 // Short sometimes to encourage collisions
: (rnd->OneIn(100) ? rnd->Skewed(10) : rnd->Uniform(10)));
return test::RandomKey(rnd, len);
}
@ -42,11 +43,10 @@ class AtomicCounter {
private:
port::Mutex mu_;
int count_ GUARDED_BY(mu_);
public:
AtomicCounter() : count_(0) { }
void Increment() {
IncrementBy(1);
}
AtomicCounter() : count_(0) {}
void Increment() { IncrementBy(1); }
void IncrementBy(int count) LOCKS_EXCLUDED(mu_) {
MutexLock l(&mu_);
count_ += count;
@ -120,15 +120,15 @@ class SpecialEnv : public EnvWrapper {
bool count_random_reads_;
AtomicCounter random_read_counter_;
explicit SpecialEnv(Env* base) : EnvWrapper(base),
delay_data_sync_(false),
data_sync_error_(false),
no_space_(false),
non_writable_(false),
manifest_sync_error_(false),
manifest_write_error_(false),
count_random_reads_(false) {
}
explicit SpecialEnv(Env* base)
: EnvWrapper(base),
delay_data_sync_(false),
data_sync_error_(false),
no_space_(false),
non_writable_(false),
manifest_sync_error_(false),
manifest_write_error_(false),
count_random_reads_(false) {}
Status NewWritableFile(const std::string& f, WritableFile** r) {
class DataFile : public WritableFile {
@ -137,10 +137,7 @@ class SpecialEnv : public EnvWrapper {
WritableFile* const base_;
public:
DataFile(SpecialEnv* env, WritableFile* base)
: env_(env),
base_(base) {
}
DataFile(SpecialEnv* env, WritableFile* base) : env_(env), base_(base) {}
~DataFile() { delete base_; }
Status Append(const Slice& data) {
if (env_->no_space_.load(std::memory_order_acquire)) {
@ -166,8 +163,9 @@ class SpecialEnv : public EnvWrapper {
private:
SpecialEnv* env_;
WritableFile* base_;
public:
ManifestFile(SpecialEnv* env, WritableFile* b) : env_(env), base_(b) { }
ManifestFile(SpecialEnv* env, WritableFile* b) : env_(env), base_(b) {}
~ManifestFile() { delete base_; }
Status Append(const Slice& data) {
if (env_->manifest_write_error_.load(std::memory_order_acquire)) {
@ -208,10 +206,10 @@ class SpecialEnv : public EnvWrapper {
private:
RandomAccessFile* target_;
AtomicCounter* counter_;
public:
CountingFile(RandomAccessFile* target, AtomicCounter* counter)
: target_(target), counter_(counter) {
}
: target_(target), counter_(counter) {}
virtual ~CountingFile() { delete target_; }
virtual Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const {
@ -233,13 +231,7 @@ class DBTest {
const FilterPolicy* filter_policy_;
// Sequence of option configurations to try
enum OptionConfig {
kDefault,
kReuse,
kFilter,
kUncompressed,
kEnd
};
enum OptionConfig { kDefault, kReuse, kFilter, kUncompressed, kEnd };
int option_config_;
public:
@ -249,8 +241,7 @@ class DBTest {
Options last_options_;
DBTest() : option_config_(kDefault),
env_(new SpecialEnv(Env::Default())) {
DBTest() : option_config_(kDefault), env_(new SpecialEnv(Env::Default())) {
filter_policy_ = NewBloomFilterPolicy(10);
dbname_ = test::TmpDir() + "/db_test";
DestroyDB(dbname_, Options());
@ -297,13 +288,9 @@ class DBTest {
return options;
}
DBImpl* dbfull() {
return reinterpret_cast<DBImpl*>(db_);
}
DBImpl* dbfull() { return reinterpret_cast<DBImpl*>(db_); }
void Reopen(Options* options = nullptr) {
ASSERT_OK(TryReopen(options));
}
void Reopen(Options* options = nullptr) { ASSERT_OK(TryReopen(options)); }
void Close() {
delete db_;
@ -336,9 +323,7 @@ class DBTest {
return db_->Put(WriteOptions(), k, v);
}
Status Delete(const std::string& k) {
return db_->Delete(WriteOptions(), k);
}
Status Delete(const std::string& k) { return db_->Delete(WriteOptions(), k); }
std::string Get(const std::string& k, const Snapshot* snapshot = nullptr) {
ReadOptions options;
@ -424,9 +409,8 @@ class DBTest {
int NumTableFilesAtLevel(int level) {
std::string property;
ASSERT_TRUE(
db_->GetProperty("leveldb.num-files-at-level" + NumberToString(level),
&property));
ASSERT_TRUE(db_->GetProperty(
"leveldb.num-files-at-level" + NumberToString(level), &property));
return std::stoi(property);
}
@ -491,9 +475,9 @@ class DBTest {
void DumpFileCounts(const char* label) {
fprintf(stderr, "---\n%s:\n", label);
fprintf(stderr, "maxoverlap: %lld\n",
static_cast<long long>(
dbfull()->TEST_MaxNextLevelOverlappingBytes()));
fprintf(
stderr, "maxoverlap: %lld\n",
static_cast<long long>(dbfull()->TEST_MaxNextLevelOverlappingBytes()));
for (int level = 0; level < config::kNumLevels; level++) {
int num = NumTableFilesAtLevel(level);
if (num > 0) {
@ -612,8 +596,8 @@ TEST(DBTest, GetFromImmutableLayer) {
// Block sync calls.
env_->delay_data_sync_.store(true, std::memory_order_release);
Put("k1", std::string(100000, 'x')); // Fill memtable.
Put("k2", std::string(100000, 'y')); // Trigger compaction.
Put("k1", std::string(100000, 'x')); // Fill memtable.
Put("k2", std::string(100000, 'y')); // Trigger compaction.
ASSERT_EQ("v1", Get("foo"));
// Release sync calls.
env_->delay_data_sync_.store(false, std::memory_order_release);
@ -635,7 +619,7 @@ TEST(DBTest, GetMemUsage) {
ASSERT_TRUE(db_->GetProperty("leveldb.approximate-memory-usage", &val));
int mem_usage = std::stoi(val);
ASSERT_GT(mem_usage, 0);
ASSERT_LT(mem_usage, 5*1024*1024);
ASSERT_LT(mem_usage, 5 * 1024 * 1024);
} while (ChangeOptions());
}
@ -760,8 +744,7 @@ TEST(DBTest, GetEncountersEmptyLevel) {
// Step 1: First place sstables in levels 0 and 2
int compaction_count = 0;
while (NumTableFilesAtLevel(0) == 0 ||
NumTableFilesAtLevel(2) == 0) {
while (NumTableFilesAtLevel(0) == 0 || NumTableFilesAtLevel(2) == 0) {
ASSERT_LE(compaction_count, 100) << "could not fill levels 0 and 2";
compaction_count++;
Put("a", "begin");
@ -898,10 +881,10 @@ TEST(DBTest, IterMulti) {
ASSERT_EQ(IterStatus(iter), "b->vb");
// Make sure iter stays at snapshot
ASSERT_OK(Put("a", "va2"));
ASSERT_OK(Put("a", "va2"));
ASSERT_OK(Put("a2", "va3"));
ASSERT_OK(Put("b", "vb2"));
ASSERT_OK(Put("c", "vc2"));
ASSERT_OK(Put("b", "vb2"));
ASSERT_OK(Put("c", "vc2"));
ASSERT_OK(Delete("b"));
iter->SeekToFirst();
ASSERT_EQ(IterStatus(iter), "a->va");
@ -1092,7 +1075,7 @@ TEST(DBTest, RecoverWithLargeLog) {
TEST(DBTest, CompactionsGenerateMultipleFiles) {
Options options = CurrentOptions();
options.write_buffer_size = 100000000; // Large write buffer
options.write_buffer_size = 100000000; // Large write buffer
Reopen(&options);
Random rnd(301);
@ -1161,26 +1144,25 @@ TEST(DBTest, SparseMerge) {
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
// Make sparse update
Put("A", "va2");
Put("A", "va2");
Put("B100", "bvalue2");
Put("C", "vc2");
Put("C", "vc2");
dbfull()->TEST_CompactMemTable();
// Compactions should not cause us to create a situation where
// a file overlaps too much data at the next level.
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20*1048576);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20 * 1048576);
dbfull()->TEST_CompactRange(0, nullptr, nullptr);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20*1048576);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20 * 1048576);
dbfull()->TEST_CompactRange(1, nullptr, nullptr);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20*1048576);
ASSERT_LE(dbfull()->TEST_MaxNextLevelOverlappingBytes(), 20 * 1048576);
}
static bool Between(uint64_t val, uint64_t low, uint64_t high) {
bool result = (val >= low) && (val <= high);
if (!result) {
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val),
(unsigned long long)(low),
(unsigned long long)(val), (unsigned long long)(low),
(unsigned long long)(high));
}
return result;
@ -1189,7 +1171,7 @@ static bool Between(uint64_t val, uint64_t low, uint64_t high) {
TEST(DBTest, ApproximateSizes) {
do {
Options options = CurrentOptions();
options.write_buffer_size = 100000000; // Large write buffer
options.write_buffer_size = 100000000; // Large write buffer
options.compression = kNoCompression;
DestroyAndReopen();
@ -1224,12 +1206,13 @@ TEST(DBTest, ApproximateSizes) {
for (int compact_start = 0; compact_start < N; compact_start += 10) {
for (int i = 0; i < N; i += 10) {
ASSERT_TRUE(Between(Size("", Key(i)), S1*i, S2*i));
ASSERT_TRUE(Between(Size("", Key(i)+".suffix"), S1*(i+1), S2*(i+1)));
ASSERT_TRUE(Between(Size(Key(i), Key(i+10)), S1*10, S2*10));
ASSERT_TRUE(Between(Size("", Key(i)), S1 * i, S2 * i));
ASSERT_TRUE(Between(Size("", Key(i) + ".suffix"), S1 * (i + 1),
S2 * (i + 1)));
ASSERT_TRUE(Between(Size(Key(i), Key(i + 10)), S1 * 10, S2 * 10));
}
ASSERT_TRUE(Between(Size("", Key(50)), S1*50, S2*50));
ASSERT_TRUE(Between(Size("", Key(50)+".suffix"), S1*50, S2*50));
ASSERT_TRUE(Between(Size("", Key(50)), S1 * 50, S2 * 50));
ASSERT_TRUE(Between(Size("", Key(50) + ".suffix"), S1 * 50, S2 * 50));
std::string cstart_str = Key(compact_start);
std::string cend_str = Key(compact_start + 9);
@ -1348,7 +1331,7 @@ TEST(DBTest, HiddenValuesAreRemoved) {
Put("pastfoo", "v");
const Snapshot* snapshot = db_->GetSnapshot();
Put("foo", "tiny");
Put("pastfoo2", "v2"); // Advance sequence number one more
Put("pastfoo2", "v2"); // Advance sequence number one more
ASSERT_OK(dbfull()->TEST_CompactMemTable());
ASSERT_GT(NumTableFilesAtLevel(0), 0);
@ -1373,14 +1356,14 @@ TEST(DBTest, DeletionMarkers1) {
Put("foo", "v1");
ASSERT_OK(dbfull()->TEST_CompactMemTable());
const int last = config::kMaxMemCompactLevel;
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo => v1 is now in last level
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo => v1 is now in last level
// Place a table at level last-1 to prevent merging with preceding mutation
Put("a", "begin");
Put("z", "end");
dbfull()->TEST_CompactMemTable();
ASSERT_EQ(NumTableFilesAtLevel(last), 1);
ASSERT_EQ(NumTableFilesAtLevel(last-1), 1);
ASSERT_EQ(NumTableFilesAtLevel(last - 1), 1);
Delete("foo");
Put("foo", "v2");
@ -1388,11 +1371,11 @@ TEST(DBTest, DeletionMarkers1) {
ASSERT_OK(dbfull()->TEST_CompactMemTable()); // Moves to level last-2
ASSERT_EQ(AllEntriesFor("foo"), "[ v2, DEL, v1 ]");
Slice z("z");
dbfull()->TEST_CompactRange(last-2, nullptr, &z);
dbfull()->TEST_CompactRange(last - 2, nullptr, &z);
// DEL eliminated, but v1 remains because we aren't compacting that level
// (DEL can be eliminated because v2 hides v1).
ASSERT_EQ(AllEntriesFor("foo"), "[ v2, v1 ]");
dbfull()->TEST_CompactRange(last-1, nullptr, nullptr);
dbfull()->TEST_CompactRange(last - 1, nullptr, nullptr);
// Merging last-1 w/ last, so we are the base level for "foo", so
// DEL is removed. (as is v1).
ASSERT_EQ(AllEntriesFor("foo"), "[ v2 ]");
@ -1402,23 +1385,23 @@ TEST(DBTest, DeletionMarkers2) {
Put("foo", "v1");
ASSERT_OK(dbfull()->TEST_CompactMemTable());
const int last = config::kMaxMemCompactLevel;
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo => v1 is now in last level
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo => v1 is now in last level
// Place a table at level last-1 to prevent merging with preceding mutation
Put("a", "begin");
Put("z", "end");
dbfull()->TEST_CompactMemTable();
ASSERT_EQ(NumTableFilesAtLevel(last), 1);
ASSERT_EQ(NumTableFilesAtLevel(last-1), 1);
ASSERT_EQ(NumTableFilesAtLevel(last - 1), 1);
Delete("foo");
ASSERT_EQ(AllEntriesFor("foo"), "[ DEL, v1 ]");
ASSERT_OK(dbfull()->TEST_CompactMemTable()); // Moves to level last-2
ASSERT_EQ(AllEntriesFor("foo"), "[ DEL, v1 ]");
dbfull()->TEST_CompactRange(last-2, nullptr, nullptr);
dbfull()->TEST_CompactRange(last - 2, nullptr, nullptr);
// DEL kept: "last" file overlaps
ASSERT_EQ(AllEntriesFor("foo"), "[ DEL, v1 ]");
dbfull()->TEST_CompactRange(last-1, nullptr, nullptr);
dbfull()->TEST_CompactRange(last - 1, nullptr, nullptr);
// Merging last-1 w/ last, so we are the base level for "foo", so
// DEL is removed. (as is v1).
ASSERT_EQ(AllEntriesFor("foo"), "[ ]");
@ -1428,7 +1411,8 @@ TEST(DBTest, OverlapInLevel0) {
do {
ASSERT_EQ(config::kMaxMemCompactLevel, 2) << "Fix test to match config";
// Fill levels 1 and 2 to disable the pushing of new memtables to levels > 0.
// Fill levels 1 and 2 to disable the pushing of new memtables to levels >
// 0.
ASSERT_OK(Put("100", "v100"));
ASSERT_OK(Put("999", "v999"));
dbfull()->TEST_CompactMemTable();
@ -1548,16 +1532,17 @@ TEST(DBTest, CustomComparator) {
return ToNumber(a) - ToNumber(b);
}
virtual void FindShortestSeparator(std::string* s, const Slice& l) const {
ToNumber(*s); // Check format
ToNumber(l); // Check format
ToNumber(*s); // Check format
ToNumber(l); // Check format
}
virtual void FindShortSuccessor(std::string* key) const {
ToNumber(*key); // Check format
ToNumber(*key); // Check format
}
private:
static int ToNumber(const Slice& x) {
// Check that there are no extra characters.
ASSERT_TRUE(x.size() >= 2 && x[0] == '[' && x[x.size()-1] == ']')
ASSERT_TRUE(x.size() >= 2 && x[0] == '[' && x[x.size() - 1] == ']')
<< EscapeString(x);
int val;
char ignored;
@ -1570,7 +1555,7 @@ TEST(DBTest, CustomComparator) {
Options new_options = CurrentOptions();
new_options.create_if_missing = true;
new_options.comparator = &cmp;
new_options.filter_policy = nullptr; // Cannot use bloom filters
new_options.filter_policy = nullptr; // Cannot use bloom filters
new_options.write_buffer_size = 1000; // Compact more often
DestroyAndReopen(&new_options);
ASSERT_OK(Put("[10]", "ten"));
@ -1588,7 +1573,7 @@ TEST(DBTest, CustomComparator) {
for (int run = 0; run < 2; run++) {
for (int i = 0; i < 1000; i++) {
char buf[100];
snprintf(buf, sizeof(buf), "[%d]", i*10);
snprintf(buf, sizeof(buf), "[%d]", i * 10);
ASSERT_OK(Put(buf, buf));
}
Compact("[0]", "[1000000]");
@ -1739,7 +1724,7 @@ TEST(DBTest, NoSpace) {
// Force out-of-space errors.
env_->no_space_.store(true, std::memory_order_release);
for (int i = 0; i < 10; i++) {
for (int level = 0; level < config::kNumLevels-1; level++) {
for (int level = 0; level < config::kNumLevels - 1; level++) {
dbfull()->TEST_CompactRange(level, nullptr, nullptr);
}
}
@ -1809,9 +1794,8 @@ TEST(DBTest, ManifestWriteError) {
// We iterate twice. In the second iteration, everything is the
// same except the log record never makes it to the MANIFEST file.
for (int iter = 0; iter < 2; iter++) {
std::atomic<bool>* error_type = (iter == 0)
? &env_->manifest_sync_error_
: &env_->manifest_write_error_;
std::atomic<bool>* error_type = (iter == 0) ? &env_->manifest_sync_error_
: &env_->manifest_write_error_;
// Insert foo=>bar mapping
Options options = CurrentOptions();
@ -1826,7 +1810,7 @@ TEST(DBTest, ManifestWriteError) {
dbfull()->TEST_CompactMemTable();
ASSERT_EQ("bar", Get("foo"));
const int last = config::kMaxMemCompactLevel;
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo=>bar is now in last level
ASSERT_EQ(NumTableFilesAtLevel(last), 1); // foo=>bar is now in last level
// Merging compaction (will fail)
error_type->store(true, std::memory_order_release);
@ -1854,8 +1838,7 @@ TEST(DBTest, MissingSSTFile) {
options.paranoid_checks = true;
Status s = TryReopen(&options);
ASSERT_TRUE(!s.ok());
ASSERT_TRUE(s.ToString().find("issing") != std::string::npos)
<< s.ToString();
ASSERT_TRUE(s.ToString().find("issing") != std::string::npos) << s.ToString();
}
TEST(DBTest, StillReadSST) {
@ -1915,7 +1898,7 @@ TEST(DBTest, BloomFilter) {
int reads = env_->random_read_counter_.Read();
fprintf(stderr, "%d present => %d reads\n", N, reads);
ASSERT_GE(reads, N);
ASSERT_LE(reads, N + 2*N/100);
ASSERT_LE(reads, N + 2 * N / 100);
// Lookup present keys. Should rarely read from either sstable.
env_->random_read_counter_.Reset();
@ -1924,7 +1907,7 @@ TEST(DBTest, BloomFilter) {
}
reads = env_->random_read_counter_.Read();
fprintf(stderr, "%d missing => %d reads\n", N, reads);
ASSERT_LE(reads, 3*N/100);
ASSERT_LE(reads, 3 * N / 100);
env_->delay_data_sync_.store(false, std::memory_order_release);
Close();
@ -1970,8 +1953,8 @@ static void MTThreadBody(void* arg) {
if (rnd.OneIn(2)) {
// Write values of the form <key, my id, counter>.
// We add some padding for force compactions.
snprintf(valbuf, sizeof(valbuf), "%d.%d.%-1000d",
key, id, static_cast<int>(counter));
snprintf(valbuf, sizeof(valbuf), "%d.%d.%-1000d", key, id,
static_cast<int>(counter));
ASSERT_OK(db->Put(WriteOptions(), Slice(keybuf), Slice(valbuf)));
} else {
// Read a value and verify that it matches the pattern written above.
@ -2033,24 +2016,24 @@ namespace {
typedef std::map<std::string, std::string> KVMap;
}
class ModelDB: public DB {
class ModelDB : public DB {
public:
class ModelSnapshot : public Snapshot {
public:
KVMap map_;
};
explicit ModelDB(const Options& options): options_(options) { }
~ModelDB() { }
explicit ModelDB(const Options& options) : options_(options) {}
~ModelDB() {}
virtual Status Put(const WriteOptions& o, const Slice& k, const Slice& v) {
return DB::Put(o, k, v);
}
virtual Status Delete(const WriteOptions& o, const Slice& key) {
return DB::Delete(o, key);
}
virtual Status Get(const ReadOptions& options,
const Slice& key, std::string* value) {
assert(false); // Not implemented
virtual Status Get(const ReadOptions& options, const Slice& key,
std::string* value) {
assert(false); // Not implemented
return Status::NotFound(key);
}
virtual Iterator* NewIterator(const ReadOptions& options) {
@ -2080,9 +2063,7 @@ class ModelDB: public DB {
virtual void Put(const Slice& key, const Slice& value) {
(*map_)[key.ToString()] = value.ToString();
}
virtual void Delete(const Slice& key) {
map_->erase(key.ToString());
}
virtual void Delete(const Slice& key) { map_->erase(key.ToString()); }
};
Handler handler;
handler.map_ = &map_;
@ -2097,15 +2078,13 @@ class ModelDB: public DB {
sizes[i] = 0;
}
}
virtual void CompactRange(const Slice* start, const Slice* end) {
}
virtual void CompactRange(const Slice* start, const Slice* end) {}
private:
class ModelIter: public Iterator {
class ModelIter : public Iterator {
public:
ModelIter(const KVMap* map, bool owned)
: map_(map), owned_(owned), iter_(map_->end()) {
}
: map_(map), owned_(owned), iter_(map_->end()) {}
~ModelIter() {
if (owned_) delete map_;
}
@ -2136,9 +2115,7 @@ class ModelDB: public DB {
KVMap map_;
};
static bool CompareIterators(int step,
DB* model,
DB* db,
static bool CompareIterators(int step, DB* model, DB* db,
const Snapshot* model_snap,
const Snapshot* db_snap) {
ReadOptions options;
@ -2149,12 +2126,10 @@ static bool CompareIterators(int step,
bool ok = true;
int count = 0;
for (miter->SeekToFirst(), dbiter->SeekToFirst();
ok && miter->Valid() && dbiter->Valid();
miter->Next(), dbiter->Next()) {
ok && miter->Valid() && dbiter->Valid(); miter->Next(), dbiter->Next()) {
count++;
if (miter->key().compare(dbiter->key()) != 0) {
fprintf(stderr, "step %d: Key mismatch: '%s' vs. '%s'\n",
step,
fprintf(stderr, "step %d: Key mismatch: '%s' vs. '%s'\n", step,
EscapeString(miter->key()).c_str(),
EscapeString(dbiter->key()).c_str());
ok = false;
@ -2163,8 +2138,7 @@ static bool CompareIterators(int step,
if (miter->value().compare(dbiter->value()) != 0) {
fprintf(stderr, "step %d: Value mismatch for key '%s': '%s' vs. '%s'\n",
step,
EscapeString(miter->key()).c_str(),
step, EscapeString(miter->key()).c_str(),
EscapeString(miter->value()).c_str(),
EscapeString(miter->value()).c_str());
ok = false;
@ -2198,22 +2172,19 @@ TEST(DBTest, Randomized) {
}
// TODO(sanjay): Test Get() works
int p = rnd.Uniform(100);
if (p < 45) { // Put
if (p < 45) { // Put
k = RandomKey(&rnd);
v = RandomString(&rnd,
rnd.OneIn(20)
? 100 + rnd.Uniform(100)
: rnd.Uniform(8));
v = RandomString(
&rnd, rnd.OneIn(20) ? 100 + rnd.Uniform(100) : rnd.Uniform(8));
ASSERT_OK(model.Put(WriteOptions(), k, v));
ASSERT_OK(db_->Put(WriteOptions(), k, v));
} else if (p < 90) { // Delete
} else if (p < 90) { // Delete
k = RandomKey(&rnd);
ASSERT_OK(model.Delete(WriteOptions(), k));
ASSERT_OK(db_->Delete(WriteOptions(), k));
} else { // Multi-element batch
} else { // Multi-element batch
WriteBatch b;
const int num = rnd.Uniform(8);
for (int i = 0; i < num; i++) {
@ -2288,8 +2259,8 @@ void BM_LogAndApply(int iters, int num_base_files) {
VersionEdit vbase;
uint64_t fnum = 1;
for (int i = 0; i < num_base_files; i++) {
InternalKey start(MakeKey(2*fnum), 1, kTypeValue);
InternalKey limit(MakeKey(2*fnum+1), 1, kTypeDeletion);
InternalKey start(MakeKey(2 * fnum), 1, kTypeValue);
InternalKey limit(MakeKey(2 * fnum + 1), 1, kTypeDeletion);
vbase.AddFile(2, fnum++, 1 /* file size */, start, limit);
}
ASSERT_OK(vset.LogAndApply(&vbase, &mu));
@ -2299,8 +2270,8 @@ void BM_LogAndApply(int iters, int num_base_files) {
for (int i = 0; i < iters; i++) {
VersionEdit vedit;
vedit.DeleteFile(2, fnum);
InternalKey start(MakeKey(2*fnum), 1, kTypeValue);
InternalKey limit(MakeKey(2*fnum+1), 1, kTypeDeletion);
InternalKey start(MakeKey(2 * fnum), 1, kTypeValue);
InternalKey limit(MakeKey(2 * fnum + 1), 1, kTypeDeletion);
vedit.AddFile(2, fnum++, 1 /* file size */, start, limit);
vset.LogAndApply(&vedit, &mu);
}
@ -2309,8 +2280,8 @@ void BM_LogAndApply(int iters, int num_base_files) {
char buf[16];
snprintf(buf, sizeof(buf), "%d", num_base_files);
fprintf(stderr,
"BM_LogAndApply/%-6s %8d iters : %9u us (%7.0f us / iter)\n",
buf, iters, us, ((float)us) / iters);
"BM_LogAndApply/%-6s %8d iters : %9u us (%7.0f us / iter)\n", buf,
iters, us, ((float)us) / iters);
}
} // namespace leveldb

22
db/dbformat.cc
View File

@ -2,8 +2,10 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <stdio.h>
#include "db/dbformat.h"
#include <stdio.h>
#include "port/port.h"
#include "util/coding.h"
@ -22,8 +24,7 @@ void AppendInternalKey(std::string* result, const ParsedInternalKey& key) {
std::string ParsedInternalKey::DebugString() const {
char buf[50];
snprintf(buf, sizeof(buf), "' @ %llu : %d",
(unsigned long long) sequence,
snprintf(buf, sizeof(buf), "' @ %llu : %d", (unsigned long long)sequence,
int(type));
std::string result = "'";
result += EscapeString(user_key.ToString());
@ -65,9 +66,8 @@ int InternalKeyComparator::Compare(const Slice& akey, const Slice& bkey) const {
return r;
}
void InternalKeyComparator::FindShortestSeparator(
std::string* start,
const Slice& limit) const {
void InternalKeyComparator::FindShortestSeparator(std::string* start,
const Slice& limit) const {
// Attempt to shorten the user portion of the key
Slice user_start = ExtractUserKey(*start);
Slice user_limit = ExtractUserKey(limit);
@ -77,7 +77,8 @@ void InternalKeyComparator::FindShortestSeparator(
user_comparator_->Compare(user_start, tmp) < 0) {
// User key has become shorter physically, but larger logically.
// Tack on the earliest possible number to the shortened user key.
PutFixed64(&tmp, PackSequenceAndType(kMaxSequenceNumber,kValueTypeForSeek));
PutFixed64(&tmp,
PackSequenceAndType(kMaxSequenceNumber, kValueTypeForSeek));
assert(this->Compare(*start, tmp) < 0);
assert(this->Compare(tmp, limit) < 0);
start->swap(tmp);
@ -92,15 +93,14 @@ void InternalKeyComparator::FindShortSuccessor(std::string* key) const {
user_comparator_->Compare(user_key, tmp) < 0) {
// User key has become shorter physically, but larger logically.
// Tack on the earliest possible number to the shortened user key.
PutFixed64(&tmp, PackSequenceAndType(kMaxSequenceNumber,kValueTypeForSeek));
PutFixed64(&tmp,
PackSequenceAndType(kMaxSequenceNumber, kValueTypeForSeek));
assert(this->Compare(*key, tmp) < 0);
key->swap(tmp);
}
}
const char* InternalFilterPolicy::Name() const {
return user_policy_->Name();
}
const char* InternalFilterPolicy::Name() const { return user_policy_->Name(); }
void InternalFilterPolicy::CreateFilter(const Slice* keys, int n,
std::string* dst) const {

33
db/dbformat.h
View File

@ -6,6 +6,7 @@
#define STORAGE_LEVELDB_DB_DBFORMAT_H_
#include <stdio.h>
#include "leveldb/comparator.h"
#include "leveldb/db.h"
#include "leveldb/filter_policy.h"
@ -48,10 +49,7 @@ class InternalKey;
// Value types encoded as the last component of internal keys.
// DO NOT CHANGE THESE ENUM VALUES: they are embedded in the on-disk
// data structures.
enum ValueType {
kTypeDeletion = 0x0,
kTypeValue = 0x1
};
enum ValueType { kTypeDeletion = 0x0, kTypeValue = 0x1 };
// kValueTypeForSeek defines the ValueType that should be passed when
// constructing a ParsedInternalKey object for seeking to a particular
// sequence number (since we sort sequence numbers in decreasing order
@ -64,17 +62,16 @@ typedef uint64_t SequenceNumber;
// We leave eight bits empty at the bottom so a type and sequence#
// can be packed together into 64-bits.
static const SequenceNumber kMaxSequenceNumber =
((0x1ull << 56) - 1);
static const SequenceNumber kMaxSequenceNumber = ((0x1ull << 56) - 1);
struct ParsedInternalKey {
Slice user_key;
SequenceNumber sequence;
ValueType type;
ParsedInternalKey() { } // Intentionally left uninitialized (for speed)
ParsedInternalKey() {} // Intentionally left uninitialized (for speed)
ParsedInternalKey(const Slice& u, const SequenceNumber& seq, ValueType t)
: user_key(u), sequence(seq), type(t) { }
: user_key(u), sequence(seq), type(t) {}
std::string DebugString() const;
};
@ -103,13 +100,13 @@ inline Slice ExtractUserKey(const Slice& internal_key) {
class InternalKeyComparator : public Comparator {
private:
const Comparator* user_comparator_;
public:
explicit InternalKeyComparator(const Comparator* c) : user_comparator_(c) { }
explicit InternalKeyComparator(const Comparator* c) : user_comparator_(c) {}
virtual const char* Name() const;
virtual int Compare(const Slice& a, const Slice& b) const;
virtual void FindShortestSeparator(
std::string* start,
const Slice& limit) const;
virtual void FindShortestSeparator(std::string* start,
const Slice& limit) const;
virtual void FindShortSuccessor(std::string* key) const;
const Comparator* user_comparator() const { return user_comparator_; }
@ -121,8 +118,9 @@ class InternalKeyComparator : public Comparator {
class InternalFilterPolicy : public FilterPolicy {
private:
const FilterPolicy* const user_policy_;
public:
explicit InternalFilterPolicy(const FilterPolicy* p) : user_policy_(p) { }
explicit InternalFilterPolicy(const FilterPolicy* p) : user_policy_(p) {}
virtual const char* Name() const;
virtual void CreateFilter(const Slice* keys, int n, std::string* dst) const;
virtual bool KeyMayMatch(const Slice& key, const Slice& filter) const;
@ -134,8 +132,9 @@ class InternalFilterPolicy : public FilterPolicy {
class InternalKey {
private:
std::string rep_;
public:
InternalKey() { } // Leave rep_ as empty to indicate it is invalid
InternalKey() {} // Leave rep_ as empty to indicate it is invalid
InternalKey(const Slice& user_key, SequenceNumber s, ValueType t) {
AppendInternalKey(&rep_, ParsedInternalKey(user_key, s, t));
}
@ -158,8 +157,8 @@ class InternalKey {
std::string DebugString() const;
};
inline int InternalKeyComparator::Compare(
const InternalKey& a, const InternalKey& b) const {
inline int InternalKeyComparator::Compare(const InternalKey& a,
const InternalKey& b) const {
return Compare(a.Encode(), b.Encode());
}
@ -204,7 +203,7 @@ class LookupKey {
const char* start_;
const char* kstart_;
const char* end_;
char space_[200]; // Avoid allocation for short keys
char space_[200]; // Avoid allocation for short keys
// No copying allowed
LookupKey(const LookupKey&);

75
db/dbformat_test.cc
View File

@ -8,8 +8,7 @@
namespace leveldb {
static std::string IKey(const std::string& user_key,
uint64_t seq,
static std::string IKey(const std::string& user_key, uint64_t seq,
ValueType vt) {
std::string encoded;
AppendInternalKey(&encoded, ParsedInternalKey(user_key, seq, vt));
@ -28,9 +27,7 @@ static std::string ShortSuccessor(const std::string& s) {
return result;
}
static void TestKey(const std::string& key,
uint64_t seq,
ValueType vt) {
static void TestKey(const std::string& key, uint64_t seq, ValueType vt) {
std::string encoded = IKey(key, seq, vt);
Slice in(encoded);
@ -44,16 +41,22 @@ static void TestKey(const std::string& key,
ASSERT_TRUE(!ParseInternalKey(Slice("bar"), &decoded));
}
class FormatTest { };
class FormatTest {};
TEST(FormatTest, InternalKey_EncodeDecode) {
const char* keys[] = { "", "k", "hello", "longggggggggggggggggggggg" };
const uint64_t seq[] = {
1, 2, 3,
(1ull << 8) - 1, 1ull << 8, (1ull << 8) + 1,
(1ull << 16) - 1, 1ull << 16, (1ull << 16) + 1,
(1ull << 32) - 1, 1ull << 32, (1ull << 32) + 1
};
const char* keys[] = {"", "k", "hello", "longggggggggggggggggggggg"};
const uint64_t seq[] = {1,
2,
3,
(1ull << 8) - 1,
1ull << 8,
(1ull << 8) + 1,
(1ull << 16) - 1,
1ull << 16,
(1ull << 16) + 1,
(1ull << 32) - 1,
1ull << 32,
(1ull << 32) + 1};
for (int k = 0; k < sizeof(keys) / sizeof(keys[0]); k++) {
for (int s = 0; s < sizeof(seq) / sizeof(seq[0]); s++) {
TestKey(keys[k], seq[s], kTypeValue);
@ -65,37 +68,35 @@ TEST(FormatTest, InternalKey_EncodeDecode) {
TEST(FormatTest, InternalKeyShortSeparator) {
// When user keys are same
ASSERT_EQ(IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue),
IKey("foo", 99, kTypeValue)));
ASSERT_EQ(IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue),
IKey("foo", 101, kTypeValue)));
ASSERT_EQ(IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue),
IKey("foo", 100, kTypeValue)));
ASSERT_EQ(IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue),
IKey("foo", 100, kTypeDeletion)));
Shorten(IKey("foo", 100, kTypeValue), IKey("foo", 99, kTypeValue)));
ASSERT_EQ(
IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue), IKey("foo", 101, kTypeValue)));
ASSERT_EQ(
IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue), IKey("foo", 100, kTypeValue)));
ASSERT_EQ(
IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue), IKey("foo", 100, kTypeDeletion)));
// When user keys are misordered
ASSERT_EQ(IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue),
IKey("bar", 99, kTypeValue)));
Shorten(IKey("foo", 100, kTypeValue), IKey("bar", 99, kTypeValue)));
// When user keys are different, but correctly ordered
ASSERT_EQ(IKey("g", kMaxSequenceNumber, kValueTypeForSeek),
Shorten(IKey("foo", 100, kTypeValue),
IKey("hello", 200, kTypeValue)));
ASSERT_EQ(
IKey("g", kMaxSequenceNumber, kValueTypeForSeek),
Shorten(IKey("foo", 100, kTypeValue), IKey("hello", 200, kTypeValue)));
// When start user key is prefix of limit user key
ASSERT_EQ(IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue),
IKey("foobar", 200, kTypeValue)));
ASSERT_EQ(
IKey("foo", 100, kTypeValue),
Shorten(IKey("foo", 100, kTypeValue), IKey("foobar", 200, kTypeValue)));
// When limit user key is prefix of start user key
ASSERT_EQ(IKey("foobar", 100, kTypeValue),
Shorten(IKey("foobar", 100, kTypeValue),
IKey("foo", 200, kTypeValue)));
ASSERT_EQ(
IKey("foobar", 100, kTypeValue),
Shorten(IKey("foobar", 100, kTypeValue), IKey("foo", 200, kTypeValue)));
}
TEST(FormatTest, InternalKeyShortestSuccessor) {
@ -107,6 +108,4 @@ TEST(FormatTest, InternalKeyShortestSuccessor) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

10
db/dumpfile.cc
View File

@ -90,7 +90,6 @@ class WriteBatchItemPrinter : public WriteBatch::Handler {
}
};
// Called on every log record (each one of which is a WriteBatch)
// found in a kLogFile.
static void WriteBatchPrinter(uint64_t pos, Slice record, WritableFile* dst) {
@ -216,9 +215,12 @@ Status DumpFile(Env* env, const std::string& fname, WritableFile* dst) {
return Status::InvalidArgument(fname + ": unknown file type");
}
switch (ftype) {
case kLogFile: return DumpLog(env, fname, dst);
case kDescriptorFile: return DumpDescriptor(env, fname, dst);
case kTableFile: return DumpTable(env, fname, dst);
case kLogFile:
return DumpLog(env, fname, dst);
case kDescriptorFile:
return DumpDescriptor(env, fname, dst);
case kTableFile:
return DumpTable(env, fname, dst);
default:
break;
}

43
db/fault_injection_test.cc
View File

@ -9,12 +9,12 @@
#include <map>
#include <set>
#include "leveldb/db.h"
#include "db/db_impl.h"
#include "db/filename.h"
#include "db/log_format.h"
#include "db/version_set.h"
#include "leveldb/cache.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
#include "leveldb/table.h"
#include "leveldb/write_batch.h"
@ -56,8 +56,7 @@ Status Truncate(const std::string& filename, uint64_t length) {
SequentialFile* orig_file;
Status s = env->NewSequentialFile(filename, &orig_file);
if (!s.ok())
return s;
if (!s.ok()) return s;
char* scratch = new char[length];
leveldb::Slice result;
@ -93,7 +92,7 @@ struct FileState {
: filename_(filename),
pos_(-1),
pos_at_last_sync_(-1),
pos_at_last_flush_(-1) { }
pos_at_last_flush_(-1) {}
FileState() : pos_(-1), pos_at_last_sync_(-1), pos_at_last_flush_(-1) {}
@ -108,8 +107,7 @@ struct FileState {
// is written to or sync'ed.
class TestWritableFile : public WritableFile {
public:
TestWritableFile(const FileState& state,
WritableFile* f,
TestWritableFile(const FileState& state, WritableFile* f,
FaultInjectionTestEnv* env);
virtual ~TestWritableFile();
virtual Status Append(const Slice& data);
@ -130,7 +128,7 @@ class FaultInjectionTestEnv : public EnvWrapper {
public:
FaultInjectionTestEnv()
: EnvWrapper(Env::Default()), filesystem_active_(true) {}
virtual ~FaultInjectionTestEnv() { }
virtual ~FaultInjectionTestEnv() {}
virtual Status NewWritableFile(const std::string& fname,
WritableFile** result);
virtual Status NewAppendableFile(const std::string& fname,
@ -165,13 +163,9 @@ class FaultInjectionTestEnv : public EnvWrapper {
bool filesystem_active_ GUARDED_BY(mutex_); // Record flushes, syncs, writes
};
TestWritableFile::TestWritableFile(const FileState& state,
WritableFile* f,
TestWritableFile::TestWritableFile(const FileState& state, WritableFile* f,
FaultInjectionTestEnv* env)
: state_(state),
target_(f),
writable_file_opened_(true),
env_(env) {
: state_(state), target_(f), writable_file_opened_(true), env_(env) {
assert(f != nullptr);
}
@ -395,9 +389,7 @@ class FaultInjectionTest {
delete env_;
}
void ReuseLogs(bool reuse) {
options_.reuse_logs = reuse;
}
void ReuseLogs(bool reuse) { options_.reuse_logs = reuse; }
void Build(int start_idx, int num_vals) {
std::string key_space, value_space;
@ -497,18 +489,17 @@ class FaultInjectionTest {
}
void PartialCompactTestReopenWithFault(ResetMethod reset_method,
int num_pre_sync,
int num_post_sync) {
int num_pre_sync, int num_post_sync) {
env_->SetFilesystemActive(false);
CloseDB();
ResetDBState(reset_method);
ASSERT_OK(OpenDB());
ASSERT_OK(Verify(0, num_pre_sync, FaultInjectionTest::VAL_EXPECT_NO_ERROR));
ASSERT_OK(Verify(num_pre_sync, num_post_sync, FaultInjectionTest::VAL_EXPECT_ERROR));
ASSERT_OK(Verify(num_pre_sync, num_post_sync,
FaultInjectionTest::VAL_EXPECT_ERROR));
}
void NoWriteTestPreFault() {
}
void NoWriteTestPreFault() {}
void NoWriteTestReopenWithFault(ResetMethod reset_method) {
CloseDB();
@ -524,8 +515,7 @@ class FaultInjectionTest {
int num_post_sync = rnd.Uniform(kMaxNumValues);
PartialCompactTestPreFault(num_pre_sync, num_post_sync);
PartialCompactTestReopenWithFault(RESET_DROP_UNSYNCED_DATA,
num_pre_sync,
PartialCompactTestReopenWithFault(RESET_DROP_UNSYNCED_DATA, num_pre_sync,
num_post_sync);
NoWriteTestPreFault();
@ -535,8 +525,7 @@ class FaultInjectionTest {
// No new files created so we expect all values since no files will be
// dropped.
PartialCompactTestReopenWithFault(RESET_DELETE_UNSYNCED_FILES,
num_pre_sync + num_post_sync,
0);
num_pre_sync + num_post_sync, 0);
NoWriteTestPreFault();
NoWriteTestReopenWithFault(RESET_DELETE_UNSYNCED_FILES);
@ -556,6 +545,4 @@ TEST(FaultInjectionTest, FaultTestWithLogReuse) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

15
db/filename.cc
View File

@ -2,9 +2,11 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include "db/filename.h"
#include <ctype.h>
#include <stdio.h>
#include "db/filename.h"
#include "db/dbformat.h"
#include "leveldb/env.h"
#include "util/logging.h"
@ -19,8 +21,7 @@ static std::string MakeFileName(const std::string& dbname, uint64_t number,
const char* suffix) {
char buf[100];
snprintf(buf, sizeof(buf), "/%06llu.%s",
static_cast<unsigned long long>(number),
suffix);
static_cast<unsigned long long>(number), suffix);
return dbname + buf;
}
@ -51,9 +52,7 @@ std::string CurrentFileName(const std::string& dbname) {
return dbname + "/CURRENT";
}
std::string LockFileName(const std::string& dbname) {
return dbname + "/LOCK";
}
std::string LockFileName(const std::string& dbname) { return dbname + "/LOCK"; }
std::string TempFileName(const std::string& dbname, uint64_t number) {
assert(number > 0);
@ -69,7 +68,6 @@ std::string OldInfoLogFileName(const std::string& dbname) {
return dbname + "/LOG.old";
}
// Owned filenames have the form:
// dbname/CURRENT
// dbname/LOCK
@ -77,8 +75,7 @@ std::string OldInfoLogFileName(const std::string& dbname) {
// dbname/LOG.old
// dbname/MANIFEST-[0-9]+
// dbname/[0-9]+.(log|sst|ldb)
bool ParseFileName(const std::string& filename,
uint64_t* number,
bool ParseFileName(const std::string& filename, uint64_t* number,
FileType* type) {
Slice rest(filename);
if (rest == "CURRENT") {

5
db/filename.h
View File

@ -8,7 +8,9 @@
#define STORAGE_LEVELDB_DB_FILENAME_H_
#include <stdint.h>
#include <string>
#include "leveldb/slice.h"
#include "leveldb/status.h"
#include "port/port.h"
@ -69,8 +71,7 @@ std::string OldInfoLogFileName(const std::string& dbname);
// If filename is a leveldb file, store the type of the file in *type.
// The number encoded in the filename is stored in *number. If the
// filename was successfully parsed, returns true. Else return false.
bool ParseFileName(const std::string& filename,
uint64_t* number,
bool ParseFileName(const std::string& filename, uint64_t* number,
FileType* type);
// Make the CURRENT file point to the descriptor file with the

74
db/filename_test.cc
View File

@ -11,7 +11,7 @@
namespace leveldb {
class FileNameTest { };
class FileNameTest {};
TEST(FileNameTest, Parse) {
Slice db;
@ -24,17 +24,17 @@ TEST(FileNameTest, Parse) {
uint64_t number;
FileType type;
} cases[] = {
{ "100.log", 100, kLogFile },
{ "0.log", 0, kLogFile },
{ "0.sst", 0, kTableFile },
{ "0.ldb", 0, kTableFile },
{ "CURRENT", 0, kCurrentFile },
{ "LOCK", 0, kDBLockFile },
{ "MANIFEST-2", 2, kDescriptorFile },
{ "MANIFEST-7", 7, kDescriptorFile },
{ "LOG", 0, kInfoLogFile },
{ "LOG.old", 0, kInfoLogFile },
{ "18446744073709551615.log", 18446744073709551615ull, kLogFile },
{"100.log", 100, kLogFile},
{"0.log", 0, kLogFile},
{"0.sst", 0, kTableFile},
{"0.ldb", 0, kTableFile},
{"CURRENT", 0, kCurrentFile},
{"LOCK", 0, kDBLockFile},
{"MANIFEST-2", 2, kDescriptorFile},
{"MANIFEST-7", 7, kDescriptorFile},
{"LOG", 0, kInfoLogFile},
{"LOG.old", 0, kInfoLogFile},
{"18446744073709551615.log", 18446744073709551615ull, kLogFile},
};
for (int i = 0; i < sizeof(cases) / sizeof(cases[0]); i++) {
std::string f = cases[i].fname;
@ -44,30 +44,28 @@ TEST(FileNameTest, Parse) {
}
// Errors
static const char* errors[] = {
"",
"foo",
"foo-dx-100.log",
".log",
"",
"manifest",
"CURREN",
"CURRENTX",
"MANIFES",
"MANIFEST",
"MANIFEST-",
"XMANIFEST-3",
"MANIFEST-3x",
"LOC",
"LOCKx",
"LO",
"LOGx",
"18446744073709551616.log",
"184467440737095516150.log",
"100",
"100.",
"100.lop"
};
static const char* errors[] = {"",
"foo",
"foo-dx-100.log",
".log",
"",
"manifest",
"CURREN",
"CURRENTX",
"MANIFES",
"MANIFEST",
"MANIFEST-",
"XMANIFEST-3",
"MANIFEST-3x",
"LOC",
"LOCKx",
"LO",
"LOGx",
"18446744073709551616.log",
"184467440737095516150.log",
"100",
"100.",
"100.lop"};
for (int i = 0; i < sizeof(errors) / sizeof(errors[0]); i++) {
std::string f = errors[i];
ASSERT_TRUE(!ParseFileName(f, &number, &type)) << f;
@ -130,6 +128,4 @@ TEST(FileNameTest, Construction) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

11
db/leveldbutil.cc
View File

@ -3,6 +3,7 @@
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <stdio.h>
#include "leveldb/dumpfile.h"
#include "leveldb/env.h"
#include "leveldb/status.h"
@ -38,11 +39,9 @@ bool HandleDumpCommand(Env* env, char** files, int num) {
} // namespace leveldb
static void Usage() {
fprintf(
stderr,
"Usage: leveldbutil command...\n"
" dump files... -- dump contents of specified files\n"
);
fprintf(stderr,
"Usage: leveldbutil command...\n"
" dump files... -- dump contents of specified files\n");
}
int main(int argc, char** argv) {
@ -54,7 +53,7 @@ int main(int argc, char** argv) {
} else {
std::string command = argv[1];
if (command == "dump") {
ok = leveldb::HandleDumpCommand(env, argv+2, argc-2);
ok = leveldb::HandleDumpCommand(env, argv + 2, argc - 2);
} else {
Usage();
ok = false;

15
db/log_reader.cc
View File

@ -5,6 +5,7 @@
#include "db/log_reader.h"
#include <stdio.h>
#include "leveldb/env.h"
#include "util/coding.h"
#include "util/crc32c.h"
@ -12,8 +13,7 @@
namespace leveldb {
namespace log {
Reader::Reporter::~Reporter() {
}
Reader::Reporter::~Reporter() {}
Reader::Reader(SequentialFile* file, Reporter* reporter, bool checksum,
uint64_t initial_offset)
@ -26,12 +26,9 @@ Reader::Reader(SequentialFile* file, Reporter* reporter, bool checksum,
last_record_offset_(0),
end_of_buffer_offset_(0),
initial_offset_(initial_offset),
resyncing_(initial_offset > 0) {
}
resyncing_(initial_offset > 0) {}
Reader::~Reader() {
delete[] backing_store_;
}
Reader::~Reader() { delete[] backing_store_; }
bool Reader::SkipToInitialBlock() {
const size_t offset_in_block = initial_offset_ % kBlockSize;
@ -176,9 +173,7 @@ bool Reader::ReadRecord(Slice* record, std::string* scratch) {
return false;
}
uint64_t Reader::LastRecordOffset() {
return last_record_offset_;
}
uint64_t Reader::LastRecordOffset() { return last_record_offset_; }
void Reader::ReportCorruption(uint64_t bytes, const char* reason) {
ReportDrop(bytes, Status::Corruption(reason));

2
db/log_reader.h
View File

@ -63,7 +63,7 @@ class Reader {
bool const checksum_;
char* const backing_store_;
Slice buffer_;
bool eof_; // Last Read() indicated EOF by returning < kBlockSize
bool eof_; // Last Read() indicated EOF by returning < kBlockSize
// Offset of the last record returned by ReadRecord.
uint64_t last_record_offset_;

140
db/log_test.cc
View File

@ -56,7 +56,7 @@ class LogTest {
Slice contents_;
bool force_error_;
bool returned_partial_;
StringSource() : force_error_(false), returned_partial_(false) { }
StringSource() : force_error_(false), returned_partial_(false) {}
virtual Status Read(size_t n, Slice* result, char* scratch) {
ASSERT_TRUE(!returned_partial_) << "must not Read() after eof/error";
@ -93,7 +93,7 @@ class LogTest {
size_t dropped_bytes_;
std::string message_;
ReportCollector() : dropped_bytes_(0) { }
ReportCollector() : dropped_bytes_(0) {}
virtual void Corruption(size_t bytes, const Status& status) {
dropped_bytes_ += bytes;
message_.append(status.ToString());
@ -113,11 +113,11 @@ class LogTest {
static int num_initial_offset_records_;
public:
LogTest() : reading_(false),
writer_(new Writer(&dest_)),
reader_(new Reader(&source_, &report_, true/*checksum*/,
0/*initial_offset*/)) {
}
LogTest()
: reading_(false),
writer_(new Writer(&dest_)),
reader_(new Reader(&source_, &report_, true /*checksum*/,
0 /*initial_offset*/)) {}
~LogTest() {
delete writer_;
@ -134,9 +134,7 @@ class LogTest {
writer_->AddRecord(Slice(msg));
}
size_t WrittenBytes() const {
return dest_.contents_.size();
}
size_t WrittenBytes() const { return dest_.contents_.size(); }
std::string Read() {
if (!reading_) {
@ -166,22 +164,16 @@ class LogTest {
void FixChecksum(int header_offset, int len) {
// Compute crc of type/len/data
uint32_t crc = crc32c::Value(&dest_.contents_[header_offset+6], 1 + len);
uint32_t crc = crc32c::Value(&dest_.contents_[header_offset + 6], 1 + len);
crc = crc32c::Mask(crc);
EncodeFixed32(&dest_.contents_[header_offset], crc);
}
void ForceError() {
source_.force_error_ = true;
}
void ForceError() { source_.force_error_ = true; }
size_t DroppedBytes() const {
return report_.dropped_bytes_;
}
size_t DroppedBytes() const { return report_.dropped_bytes_; }
std::string ReportMessage() const {
return report_.message_;
}
std::string ReportMessage() const { return report_.message_; }
// Returns OK iff recorded error message contains "msg"
std::string MatchError(const std::string& msg) const {
@ -202,14 +194,14 @@ class LogTest {
void StartReadingAt(uint64_t initial_offset) {
delete reader_;
reader_ = new Reader(&source_, &report_, true/*checksum*/, initial_offset);
reader_ = new Reader(&source_, &report_, true /*checksum*/, initial_offset);
}
void CheckOffsetPastEndReturnsNoRecords(uint64_t offset_past_end) {
WriteInitialOffsetLog();
reading_ = true;
source_.contents_ = Slice(dest_.contents_);
Reader* offset_reader = new Reader(&source_, &report_, true/*checksum*/,
Reader* offset_reader = new Reader(&source_, &report_, true /*checksum*/,
WrittenBytes() + offset_past_end);
Slice record;
std::string scratch;
@ -222,8 +214,8 @@ class LogTest {
WriteInitialOffsetLog();
reading_ = true;
source_.contents_ = Slice(dest_.contents_);
Reader* offset_reader = new Reader(&source_, &report_, true/*checksum*/,
initial_offset);
Reader* offset_reader =
new Reader(&source_, &report_, true /*checksum*/, initial_offset);
// Read all records from expected_record_offset through the last one.
ASSERT_LT(expected_record_offset, num_initial_offset_records_);
@ -242,34 +234,30 @@ class LogTest {
}
};
size_t LogTest::initial_offset_record_sizes_[] =
{10000, // Two sizable records in first block
10000,
2 * log::kBlockSize - 1000, // Span three blocks
1,
13716, // Consume all but two bytes of block 3.
log::kBlockSize - kHeaderSize, // Consume the entirety of block 4.
};
size_t LogTest::initial_offset_record_sizes_[] = {
10000, // Two sizable records in first block
10000,
2 * log::kBlockSize - 1000, // Span three blocks
1,
13716, // Consume all but two bytes of block 3.
log::kBlockSize - kHeaderSize, // Consume the entirety of block 4.
};
uint64_t LogTest::initial_offset_last_record_offsets_[] =
{0,
kHeaderSize + 10000,
2 * (kHeaderSize + 10000),
2 * (kHeaderSize + 10000) +
(2 * log::kBlockSize - 1000) + 3 * kHeaderSize,
2 * (kHeaderSize + 10000) +
(2 * log::kBlockSize - 1000) + 3 * kHeaderSize
+ kHeaderSize + 1,
3 * log::kBlockSize,
};
uint64_t LogTest::initial_offset_last_record_offsets_[] = {
0,
kHeaderSize + 10000,
2 * (kHeaderSize + 10000),
2 * (kHeaderSize + 10000) + (2 * log::kBlockSize - 1000) + 3 * kHeaderSize,
2 * (kHeaderSize + 10000) + (2 * log::kBlockSize - 1000) + 3 * kHeaderSize +
kHeaderSize + 1,
3 * log::kBlockSize,
};
// LogTest::initial_offset_last_record_offsets_ must be defined before this.
int LogTest::num_initial_offset_records_ =
sizeof(LogTest::initial_offset_last_record_offsets_)/sizeof(uint64_t);
sizeof(LogTest::initial_offset_last_record_offsets_) / sizeof(uint64_t);
TEST(LogTest, Empty) {
ASSERT_EQ("EOF", Read());
}
TEST(LogTest, Empty) { ASSERT_EQ("EOF", Read()); }
TEST(LogTest, ReadWrite) {
Write("foo");
@ -306,7 +294,7 @@ TEST(LogTest, Fragmentation) {
TEST(LogTest, MarginalTrailer) {
// Make a trailer that is exactly the same length as an empty record.
const int n = kBlockSize - 2*kHeaderSize;
const int n = kBlockSize - 2 * kHeaderSize;
Write(BigString("foo", n));
ASSERT_EQ(kBlockSize - kHeaderSize, WrittenBytes());
Write("");
@ -319,7 +307,7 @@ TEST(LogTest, MarginalTrailer) {
TEST(LogTest, MarginalTrailer2) {
// Make a trailer that is exactly the same length as an empty record.
const int n = kBlockSize - 2*kHeaderSize;
const int n = kBlockSize - 2 * kHeaderSize;
Write(BigString("foo", n));
ASSERT_EQ(kBlockSize - kHeaderSize, WrittenBytes());
Write("bar");
@ -331,7 +319,7 @@ TEST(LogTest, MarginalTrailer2) {
}
TEST(LogTest, ShortTrailer) {
const int n = kBlockSize - 2*kHeaderSize + 4;
const int n = kBlockSize - 2 * kHeaderSize + 4;
Write(BigString("foo", n));
ASSERT_EQ(kBlockSize - kHeaderSize + 4, WrittenBytes());
Write("");
@ -343,7 +331,7 @@ TEST(LogTest, ShortTrailer) {
}
TEST(LogTest, AlignedEof) {
const int n = kBlockSize - 2*kHeaderSize + 4;
const int n = kBlockSize - 2 * kHeaderSize + 4;
Write(BigString("foo", n));
ASSERT_EQ(kBlockSize - kHeaderSize + 4, WrittenBytes());
ASSERT_EQ(BigString("foo", n), Read());
@ -394,7 +382,7 @@ TEST(LogTest, BadRecordType) {
TEST(LogTest, TruncatedTrailingRecordIsIgnored) {
Write("foo");
ShrinkSize(4); // Drop all payload as well as a header byte
ShrinkSize(4); // Drop all payload as well as a header byte
ASSERT_EQ("EOF", Read());
// Truncated last record is ignored, not treated as an error.
ASSERT_EQ(0, DroppedBytes());
@ -492,7 +480,7 @@ TEST(LogTest, SkipIntoMultiRecord) {
// If initial_offset points to a record after first(R1) but before first(R2)
// incomplete fragment errors are not actual errors, and must be suppressed
// until a new first or full record is encountered.
Write(BigString("foo", 3*kBlockSize));
Write(BigString("foo", 3 * kBlockSize));
Write("correct");
StartReadingAt(kBlockSize);
@ -514,44 +502,30 @@ TEST(LogTest, ErrorJoinsRecords) {
Write("correct");
// Wipe the middle block
for (int offset = kBlockSize; offset < 2*kBlockSize; offset++) {
for (int offset = kBlockSize; offset < 2 * kBlockSize; offset++) {
SetByte(offset, 'x');
}
ASSERT_EQ("correct", Read());
ASSERT_EQ("EOF", Read());
const size_t dropped = DroppedBytes();
ASSERT_LE(dropped, 2*kBlockSize + 100);
ASSERT_GE(dropped, 2*kBlockSize);
ASSERT_LE(dropped, 2 * kBlockSize + 100);
ASSERT_GE(dropped, 2 * kBlockSize);
}
TEST(LogTest, ReadStart) {
CheckInitialOffsetRecord(0, 0);
}
TEST(LogTest, ReadStart) { CheckInitialOffsetRecord(0, 0); }
TEST(LogTest, ReadSecondOneOff) {
CheckInitialOffsetRecord(1, 1);
}
TEST(LogTest, ReadSecondOneOff) { CheckInitialOffsetRecord(1, 1); }
TEST(LogTest, ReadSecondTenThousand) {
CheckInitialOffsetRecord(10000, 1);
}
TEST(LogTest, ReadSecondTenThousand) { CheckInitialOffsetRecord(10000, 1); }
TEST(LogTest, ReadSecondStart) {
CheckInitialOffsetRecord(10007, 1);
}
TEST(LogTest, ReadSecondStart) { CheckInitialOffsetRecord(10007, 1); }
TEST(LogTest, ReadThirdOneOff) {
CheckInitialOffsetRecord(10008, 2);
}
TEST(LogTest, ReadThirdOneOff) { CheckInitialOffsetRecord(10008, 2); }
TEST(LogTest, ReadThirdStart) {
CheckInitialOffsetRecord(20014, 2);
}
TEST(LogTest, ReadThirdStart) { CheckInitialOffsetRecord(20014, 2); }
TEST(LogTest, ReadFourthOneOff) {
CheckInitialOffsetRecord(20015, 3);
}
TEST(LogTest, ReadFourthOneOff) { CheckInitialOffsetRecord(20015, 3); }
TEST(LogTest, ReadFourthFirstBlockTrailer) {
CheckInitialOffsetRecord(log::kBlockSize - 4, 3);
@ -575,17 +549,11 @@ TEST(LogTest, ReadInitialOffsetIntoBlockPadding) {
CheckInitialOffsetRecord(3 * log::kBlockSize - 3, 5);
}
TEST(LogTest, ReadEnd) {
CheckOffsetPastEndReturnsNoRecords(0);
}
TEST(LogTest, ReadEnd) { CheckOffsetPastEndReturnsNoRecords(0); }
TEST(LogTest, ReadPastEnd) {
CheckOffsetPastEndReturnsNoRecords(5);
}
TEST(LogTest, ReadPastEnd) { CheckOffsetPastEndReturnsNoRecords(5); }
} // namespace log
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

29
db/log_writer.cc
View File

@ -5,6 +5,7 @@
#include "db/log_writer.h"
#include <stdint.h>
#include "leveldb/env.h"
#include "util/coding.h"
#include "util/crc32c.h"
@ -19,9 +20,7 @@ static void InitTypeCrc(uint32_t* type_crc) {
}
}
Writer::Writer(WritableFile* dest)
: dest_(dest),
block_offset_(0) {
Writer::Writer(WritableFile* dest) : dest_(dest), block_offset_(0) {
InitTypeCrc(type_crc_);
}
@ -30,8 +29,7 @@ Writer::Writer(WritableFile* dest, uint64_t dest_length)
InitTypeCrc(type_crc_);
}
Writer::~Writer() {
}
Writer::~Writer() {}
Status Writer::AddRecord(const Slice& slice) {
const char* ptr = slice.data();
@ -49,7 +47,7 @@ Status Writer::AddRecord(const Slice& slice) {
// Switch to a new block
if (leftover > 0) {
// Fill the trailer (literal below relies on kHeaderSize being 7)
assert(kHeaderSize == 7);
static_assert(kHeaderSize == 7, "");
dest_->Append(Slice("\x00\x00\x00\x00\x00\x00", leftover));
}
block_offset_ = 0;
@ -81,30 +79,31 @@ Status Writer::AddRecord(const Slice& slice) {
return s;
}
Status Writer::EmitPhysicalRecord(RecordType t, const char* ptr, size_t n) {
assert(n <= 0xffff); // Must fit in two bytes
assert(block_offset_ + kHeaderSize + n <= kBlockSize);
Status Writer::EmitPhysicalRecord(RecordType t, const char* ptr,
size_t length) {
assert(length <= 0xffff); // Must fit in two bytes
assert(block_offset_ + kHeaderSize + length <= kBlockSize);
// Format the header
char buf[kHeaderSize];
buf[4] = static_cast<char>(n & 0xff);
buf[5] = static_cast<char>(n >> 8);
buf[4] = static_cast<char>(length & 0xff);
buf[5] = static_cast<char>(length >> 8);
buf[6] = static_cast<char>(t);
// Compute the crc of the record type and the payload.
uint32_t crc = crc32c::Extend(type_crc_[t], ptr, n);
crc = crc32c::Mask(crc); // Adjust for storage
uint32_t crc = crc32c::Extend(type_crc_[t], ptr, length);
crc = crc32c::Mask(crc); // Adjust for storage
EncodeFixed32(buf, crc);
// Write the header and the payload
Status s = dest_->Append(Slice(buf, kHeaderSize));
if (s.ok()) {
s = dest_->Append(Slice(ptr, n));
s = dest_->Append(Slice(ptr, length));
if (s.ok()) {
s = dest_->Flush();
}
}
block_offset_ += kHeaderSize + n;
block_offset_ += kHeaderSize + length;
return s;
}

3
db/log_writer.h
View File

@ -6,6 +6,7 @@
#define STORAGE_LEVELDB_DB_LOG_WRITER_H_
#include <stdint.h>
#include "db/log_format.h"
#include "leveldb/slice.h"
#include "leveldb/status.h"
@ -34,7 +35,7 @@ class Writer {
private:
WritableFile* dest_;
int block_offset_; // Current offset in block
int block_offset_; // Current offset in block
// crc32c values for all supported record types. These are
// pre-computed to reduce the overhead of computing the crc of the

39
db/memtable.cc
View File

@ -18,20 +18,15 @@ static Slice GetLengthPrefixedSlice(const char* data) {
return Slice(p, len);
}
MemTable::MemTable(const InternalKeyComparator& cmp)
: comparator_(cmp),
refs_(0),
table_(comparator_, &arena_) {
}
MemTable::MemTable(const InternalKeyComparator& comparator)
: comparator_(comparator), refs_(0), table_(comparator_, &arena_) {}
MemTable::~MemTable() {
assert(refs_ == 0);
}
MemTable::~MemTable() { assert(refs_ == 0); }
size_t MemTable::ApproximateMemoryUsage() { return arena_.MemoryUsage(); }
int MemTable::KeyComparator::operator()(const char* aptr, const char* bptr)
const {
int MemTable::KeyComparator::operator()(const char* aptr,
const char* bptr) const {
// Internal keys are encoded as length-prefixed strings.
Slice a = GetLengthPrefixedSlice(aptr);
Slice b = GetLengthPrefixedSlice(bptr);
@ -48,9 +43,9 @@ static const char* EncodeKey(std::string* scratch, const Slice& target) {
return scratch->data();
}
class MemTableIterator: public Iterator {
class MemTableIterator : public Iterator {
public:
explicit MemTableIterator(MemTable::Table* table) : iter_(table) { }
explicit MemTableIterator(MemTable::Table* table) : iter_(table) {}
virtual bool Valid() const { return iter_.Valid(); }
virtual void Seek(const Slice& k) { iter_.Seek(EncodeKey(&tmp_, k)); }
@ -68,19 +63,16 @@ class MemTableIterator: public Iterator {
private:
MemTable::Table::Iterator iter_;
std::string tmp_; // For passing to EncodeKey
std::string tmp_; // For passing to EncodeKey
// No copying allowed
MemTableIterator(const MemTableIterator&);
void operator=(const MemTableIterator&);
};
Iterator* MemTable::NewIterator() {
return new MemTableIterator(&table_);
}
Iterator* MemTable::NewIterator() { return new MemTableIterator(&table_); }
void MemTable::Add(SequenceNumber s, ValueType type,
const Slice& key,
void MemTable::Add(SequenceNumber s, ValueType type, const Slice& key,
const Slice& value) {
// Format of an entry is concatenation of:
// key_size : varint32 of internal_key.size()
@ -90,9 +82,9 @@ void MemTable::Add(SequenceNumber s, ValueType type,
size_t key_size = key.size();
size_t val_size = value.size();
size_t internal_key_size = key_size + 8;
const size_t encoded_len =
VarintLength(internal_key_size) + internal_key_size +
VarintLength(val_size) + val_size;
const size_t encoded_len = VarintLength(internal_key_size) +
internal_key_size + VarintLength(val_size) +
val_size;
char* buf = arena_.Allocate(encoded_len);
char* p = EncodeVarint32(buf, internal_key_size);
memcpy(p, key.data(), key_size);
@ -121,10 +113,9 @@ bool MemTable::Get(const LookupKey& key, std::string* value, Status* s) {
// all entries with overly large sequence numbers.
const char* entry = iter.key();
uint32_t key_length;
const char* key_ptr = GetVarint32Ptr(entry, entry+5, &key_length);
const char* key_ptr = GetVarint32Ptr(entry, entry + 5, &key_length);
if (comparator_.comparator.user_comparator()->Compare(
Slice(key_ptr, key_length - 8),
key.user_key()) == 0) {
Slice(key_ptr, key_length - 8), key.user_key()) == 0) {
// Correct user key
const uint64_t tag = DecodeFixed64(key_ptr + key_length - 8);
switch (static_cast<ValueType>(tag & 0xff)) {

8
db/memtable.h
View File

@ -6,9 +6,10 @@
#define STORAGE_LEVELDB_DB_MEMTABLE_H_
#include <string>
#include "leveldb/db.h"
#include "db/dbformat.h"
#include "db/skiplist.h"
#include "leveldb/db.h"
#include "util/arena.h"
namespace leveldb {
@ -49,8 +50,7 @@ class MemTable {
// Add an entry into memtable that maps key to value at the
// specified sequence number and with the specified type.
// Typically value will be empty if type==kTypeDeletion.
void Add(SequenceNumber seq, ValueType type,
const Slice& key,
void Add(SequenceNumber seq, ValueType type, const Slice& key,
const Slice& value);
// If memtable contains a value for key, store it in *value and return true.
@ -64,7 +64,7 @@ class MemTable {
struct KeyComparator {
const InternalKeyComparator comparator;
explicit KeyComparator(const InternalKeyComparator& c) : comparator(c) { }
explicit KeyComparator(const InternalKeyComparator& c) : comparator(c) {}
int operator()(const char* a, const char* b) const;
};
friend class MemTableIterator;

44
db/recovery_test.cc
View File

@ -86,15 +86,13 @@ class RecoveryTest {
std::string current;
ASSERT_OK(ReadFileToString(env_, CurrentFileName(dbname_), &current));
size_t len = current.size();
if (len > 0 && current[len-1] == '\n') {
if (len > 0 && current[len - 1] == '\n') {
current.resize(len - 1);
}
return dbname_ + "/" + current;
}
std::string LogName(uint64_t number) {
return LogFileName(dbname_, number);
}
std::string LogName(uint64_t number) { return LogFileName(dbname_, number); }
size_t DeleteLogFiles() {
// Linux allows unlinking open files, but Windows does not.
@ -107,13 +105,9 @@ class RecoveryTest {
return logs.size();
}
void DeleteManifestFile() {
ASSERT_OK(env_->DeleteFile(ManifestFileName()));
}
void DeleteManifestFile() { ASSERT_OK(env_->DeleteFile(ManifestFileName())); }
uint64_t FirstLogFile() {
return GetFiles(kLogFile)[0];
}
uint64_t FirstLogFile() { return GetFiles(kLogFile)[0]; }
std::vector<uint64_t> GetFiles(FileType t) {
std::vector<std::string> filenames;
@ -129,13 +123,9 @@ class RecoveryTest {
return result;
}
int NumLogs() {
return GetFiles(kLogFile).size();
}
int NumLogs() { return GetFiles(kLogFile).size(); }
int NumTables() {
return GetFiles(kTableFile).size();
}
int NumTables() { return GetFiles(kTableFile).size(); }
uint64_t FileSize(const std::string& fname) {
uint64_t result;
@ -143,9 +133,7 @@ class RecoveryTest {
return result;
}
void CompactMemTable() {
dbfull()->TEST_CompactMemTable();
}
void CompactMemTable() { dbfull()->TEST_CompactMemTable(); }
// Directly construct a log file that sets key to val.
void MakeLogFile(uint64_t lognum, SequenceNumber seq, Slice key, Slice val) {
@ -197,7 +185,7 @@ TEST(RecoveryTest, LargeManifestCompacted) {
uint64_t len = FileSize(old_manifest);
WritableFile* file;
ASSERT_OK(env()->NewAppendableFile(old_manifest, &file));
std::string zeroes(3*1048576 - static_cast<size_t>(len), 0);
std::string zeroes(3 * 1048576 - static_cast<size_t>(len), 0);
ASSERT_OK(file->Append(zeroes));
ASSERT_OK(file->Flush());
delete file;
@ -270,7 +258,7 @@ TEST(RecoveryTest, MultipleMemTables) {
// Force creation of multiple memtables by reducing the write buffer size.
Options opt;
opt.reuse_logs = true;
opt.write_buffer_size = (kNum*100) / 2;
opt.write_buffer_size = (kNum * 100) / 2;
Open(&opt);
ASSERT_LE(2, NumTables());
ASSERT_EQ(1, NumLogs());
@ -289,16 +277,16 @@ TEST(RecoveryTest, MultipleLogFiles) {
// Make a bunch of uncompacted log files.
uint64_t old_log = FirstLogFile();
MakeLogFile(old_log+1, 1000, "hello", "world");
MakeLogFile(old_log+2, 1001, "hi", "there");
MakeLogFile(old_log+3, 1002, "foo", "bar2");
MakeLogFile(old_log + 1, 1000, "hello", "world");
MakeLogFile(old_log + 2, 1001, "hi", "there");
MakeLogFile(old_log + 3, 1002, "foo", "bar2");
// Recover and check that all log files were processed.
Open();
ASSERT_LE(1, NumTables());
ASSERT_EQ(1, NumLogs());
uint64_t new_log = FirstLogFile();
ASSERT_LE(old_log+3, new_log);
ASSERT_LE(old_log + 3, new_log);
ASSERT_EQ("bar2", Get("foo"));
ASSERT_EQ("world", Get("hello"));
ASSERT_EQ("there", Get("hi"));
@ -316,7 +304,7 @@ TEST(RecoveryTest, MultipleLogFiles) {
// Check that introducing an older log file does not cause it to be re-read.
Close();
MakeLogFile(old_log+1, 2000, "hello", "stale write");
MakeLogFile(old_log + 1, 2000, "hello", "stale write");
Open();
ASSERT_LE(1, NumTables());
ASSERT_EQ(1, NumLogs());
@ -339,6 +327,4 @@ TEST(RecoveryTest, ManifestMissing) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

47
db/repair.cc
View File

@ -84,9 +84,7 @@ class Repairer {
"recovered %d files; %llu bytes. "
"Some data may have been lost. "
"****",
dbname_.c_str(),
static_cast<int>(tables_.size()),
bytes);
dbname_.c_str(), static_cast<int>(tables_.size()), bytes);
}
return status;
}
@ -152,8 +150,7 @@ class Repairer {
Status status = ConvertLogToTable(logs_[i]);
if (!status.ok()) {
Log(options_.info_log, "Log #%llu: ignoring conversion error: %s",
(unsigned long long) logs_[i],
status.ToString().c_str());
(unsigned long long)logs_[i], status.ToString().c_str());
}
ArchiveFile(logname);
}
@ -167,8 +164,7 @@ class Repairer {
virtual void Corruption(size_t bytes, const Status& s) {
// We print error messages for corruption, but continue repairing.
Log(info_log, "Log #%llu: dropping %d bytes; %s",
(unsigned long long) lognum,
static_cast<int>(bytes),
(unsigned long long)lognum, static_cast<int>(bytes),
s.ToString().c_str());
}
};
@ -190,8 +186,8 @@ class Repairer {
// corruptions cause entire commits to be skipped instead of
// propagating bad information (like overly large sequence
// numbers).
log::Reader reader(lfile, &reporter, false/*do not checksum*/,
0/*initial_offset*/);
log::Reader reader(lfile, &reporter, false /*do not checksum*/,
0 /*initial_offset*/);
// Read all the records and add to a memtable
std::string scratch;
@ -202,8 +198,8 @@ class Repairer {
int counter = 0;
while (reader.ReadRecord(&record, &scratch)) {
if (record.size() < 12) {
reporter.Corruption(
record.size(), Status::Corruption("log record too small"));
reporter.Corruption(record.size(),
Status::Corruption("log record too small"));
continue;
}
WriteBatchInternal::SetContents(&batch, record);
@ -212,8 +208,7 @@ class Repairer {
counter += WriteBatchInternal::Count(&batch);
} else {
Log(options_.info_log, "Log #%llu: ignoring %s",
(unsigned long long) log,
status.ToString().c_str());
(unsigned long long)log, status.ToString().c_str());
status = Status::OK(); // Keep going with rest of file
}
}
@ -234,9 +229,7 @@ class Repairer {
}
}
Log(options_.info_log, "Log #%llu: %d ops saved to Table #%llu %s",
(unsigned long long) log,
counter,
(unsigned long long) meta.number,
(unsigned long long)log, counter, (unsigned long long)meta.number,
status.ToString().c_str());
return status;
}
@ -272,8 +265,7 @@ class Repairer {
ArchiveFile(TableFileName(dbname_, number));
ArchiveFile(SSTTableFileName(dbname_, number));
Log(options_.info_log, "Table #%llu: dropped: %s",
(unsigned long long) t.meta.number,
status.ToString().c_str());
(unsigned long long)t.meta.number, status.ToString().c_str());
return;
}
@ -287,8 +279,7 @@ class Repairer {
Slice key = iter->key();
if (!ParseInternalKey(key, &parsed)) {
Log(options_.info_log, "Table #%llu: unparsable key %s",
(unsigned long long) t.meta.number,
EscapeString(key).c_str());
(unsigned long long)t.meta.number, EscapeString(key).c_str());
continue;
}
@ -307,9 +298,7 @@ class Repairer {
}
delete iter;
Log(options_.info_log, "Table #%llu: %d entries %s",
(unsigned long long) t.meta.number,
counter,
status.ToString().c_str());
(unsigned long long)t.meta.number, counter, status.ToString().c_str());
if (status.ok()) {
tables_.push_back(t);
@ -363,7 +352,7 @@ class Repairer {
s = env_->RenameFile(copy, orig);
if (s.ok()) {
Log(options_.info_log, "Table #%llu: %d entries repaired",
(unsigned long long) t.meta.number, counter);
(unsigned long long)t.meta.number, counter);
tables_.push_back(t);
}
}
@ -395,11 +384,11 @@ class Repairer {
for (size_t i = 0; i < tables_.size(); i++) {
// TODO(opt): separate out into multiple levels
const TableInfo& t = tables_[i];
edit_.AddFile(0, t.meta.number, t.meta.file_size,
t.meta.smallest, t.meta.largest);
edit_.AddFile(0, t.meta.number, t.meta.file_size, t.meta.smallest,
t.meta.largest);
}
//fprintf(stderr, "NewDescriptor:\n%s\n", edit_.DebugString().c_str());
// fprintf(stderr, "NewDescriptor:\n%s\n", edit_.DebugString().c_str());
{
log::Writer log(file);
std::string record;
@ -447,8 +436,8 @@ class Repairer {
new_file.append("/");
new_file.append((slash == nullptr) ? fname.c_str() : slash + 1);
Status s = env_->RenameFile(fname, new_file);
Log(options_.info_log, "Archiving %s: %s\n",
fname.c_str(), s.ToString().c_str());
Log(options_.info_log, "Archiving %s: %s\n", fname.c_str(),
s.ToString().c_str());
}
};
} // namespace

48
db/skiplist.h
View File

@ -38,7 +38,7 @@ namespace leveldb {
class Arena;
template<typename Key, class Comparator>
template <typename Key, class Comparator>
class SkipList {
private:
struct Node;
@ -100,13 +100,13 @@ class SkipList {
// Immutable after construction
Comparator const compare_;
Arena* const arena_; // Arena used for allocations of nodes
Arena* const arena_; // Arena used for allocations of nodes
Node* const head_;
// Modified only by Insert(). Read racily by readers, but stale
// values are ok.
std::atomic<int> max_height_; // Height of the entire list
std::atomic<int> max_height_; // Height of the entire list
inline int GetMaxHeight() const {
return max_height_.load(std::memory_order_relaxed);
@ -143,9 +143,9 @@ class SkipList {
};
// Implementation details follow
template<typename Key, class Comparator>
template <typename Key, class Comparator>
struct SkipList<Key, Comparator>::Node {
explicit Node(const Key& k) : key(k) { }
explicit Node(const Key& k) : key(k) {}
Key const key;
@ -179,38 +179,38 @@ struct SkipList<Key, Comparator>::Node {
std::atomic<Node*> next_[1];
};
template<typename Key, class Comparator>
typename SkipList<Key, Comparator>::Node*
SkipList<Key, Comparator>::NewNode(const Key& key, int height) {
template <typename Key, class Comparator>
typename SkipList<Key, Comparator>::Node* SkipList<Key, Comparator>::NewNode(
const Key& key, int height) {
char* const node_memory = arena_->AllocateAligned(
sizeof(Node) + sizeof(std::atomic<Node*>) * (height - 1));
return new (node_memory) Node(key);
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline SkipList<Key, Comparator>::Iterator::Iterator(const SkipList* list) {
list_ = list;
node_ = nullptr;
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline bool SkipList<Key, Comparator>::Iterator::Valid() const {
return node_ != nullptr;
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline const Key& SkipList<Key, Comparator>::Iterator::key() const {
assert(Valid());
return node_->key;
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline void SkipList<Key, Comparator>::Iterator::Next() {
assert(Valid());
node_ = node_->Next(0);
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline void SkipList<Key, Comparator>::Iterator::Prev() {
// Instead of using explicit "prev" links, we just search for the
// last node that falls before key.
@ -221,17 +221,17 @@ inline void SkipList<Key, Comparator>::Iterator::Prev() {
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline void SkipList<Key, Comparator>::Iterator::Seek(const Key& target) {
node_ = list_->FindGreaterOrEqual(target, nullptr);
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline void SkipList<Key, Comparator>::Iterator::SeekToFirst() {
node_ = list_->head_->Next(0);
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
inline void SkipList<Key, Comparator>::Iterator::SeekToLast() {
node_ = list_->FindLast();
if (node_ == list_->head_) {
@ -239,7 +239,7 @@ inline void SkipList<Key, Comparator>::Iterator::SeekToLast() {
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
int SkipList<Key, Comparator>::RandomHeight() {
// Increase height with probability 1 in kBranching
static const unsigned int kBranching = 4;
@ -252,13 +252,13 @@ int SkipList<Key, Comparator>::RandomHeight() {
return height;
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
bool SkipList<Key, Comparator>::KeyIsAfterNode(const Key& key, Node* n) const {
// null n is considered infinite
return (n != nullptr) && (compare_(n->key, key) < 0);
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
typename SkipList<Key, Comparator>::Node*
SkipList<Key, Comparator>::FindGreaterOrEqual(const Key& key,
Node** prev) const {
@ -281,7 +281,7 @@ SkipList<Key, Comparator>::FindGreaterOrEqual(const Key& key,
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
typename SkipList<Key, Comparator>::Node*
SkipList<Key, Comparator>::FindLessThan(const Key& key) const {
Node* x = head_;
@ -302,7 +302,7 @@ SkipList<Key, Comparator>::FindLessThan(const Key& key) const {
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
typename SkipList<Key, Comparator>::Node* SkipList<Key, Comparator>::FindLast()
const {
Node* x = head_;
@ -322,7 +322,7 @@ typename SkipList<Key, Comparator>::Node* SkipList<Key, Comparator>::FindLast()
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
SkipList<Key, Comparator>::SkipList(Comparator cmp, Arena* arena)
: compare_(cmp),
arena_(arena),
@ -334,7 +334,7 @@ SkipList<Key, Comparator>::SkipList(Comparator cmp, Arena* arena)
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
void SkipList<Key, Comparator>::Insert(const Key& key) {
// TODO(opt): We can use a barrier-free variant of FindGreaterOrEqual()
// here since Insert() is externally synchronized.
@ -368,7 +368,7 @@ void SkipList<Key, Comparator>::Insert(const Key& key) {
}
}
template<typename Key, class Comparator>
template <typename Key, class Comparator>
bool SkipList<Key, Comparator>::Contains(const Key& key) const {
Node* x = FindGreaterOrEqual(key, nullptr);
if (x != nullptr && Equal(key, x->key)) {

38
db/skiplist_test.cc
View File

@ -31,7 +31,7 @@ struct Comparator {
}
};
class SkipTest { };
class SkipTest {};
TEST(SkipTest, Empty) {
Arena arena;
@ -117,8 +117,7 @@ TEST(SkipTest, InsertAndLookup) {
// Compare against model iterator
for (std::set<Key>::reverse_iterator model_iter = keys.rbegin();
model_iter != keys.rend();
++model_iter) {
model_iter != keys.rend(); ++model_iter) {
ASSERT_TRUE(iter.Valid());
ASSERT_EQ(*model_iter, iter.key());
iter.Prev();
@ -160,12 +159,12 @@ class ConcurrentTest {
static uint64_t hash(Key key) { return key & 0xff; }
static uint64_t HashNumbers(uint64_t k, uint64_t g) {
uint64_t data[2] = { k, g };
uint64_t data[2] = {k, g};
return Hash(reinterpret_cast<char*>(data), sizeof(data), 0);
}
static Key MakeKey(uint64_t k, uint64_t g) {
assert(sizeof(Key) == sizeof(uint64_t));
static_assert(sizeof(Key) == sizeof(uint64_t), "");
assert(k <= K); // We sometimes pass K to seek to the end of the skiplist
assert(g <= 0xffffffffu);
return ((k << 40) | (g << 8) | (HashNumbers(k, g) & 0xff));
@ -195,9 +194,7 @@ class ConcurrentTest {
void Set(int k, int v) {
generation[k].store(v, std::memory_order_release);
}
int Get(int k) {
return generation[k].load(std::memory_order_acquire);
}
int Get(int k) { return generation[k].load(std::memory_order_acquire); }
State() {
for (int k = 0; k < K; k++) {
@ -216,7 +213,7 @@ class ConcurrentTest {
SkipList<Key, Comparator> list_;
public:
ConcurrentTest() : list_(Comparator(), &arena_) { }
ConcurrentTest() : list_(Comparator(), &arena_) {}
// REQUIRES: External synchronization
void WriteStep(Random* rnd) {
@ -255,11 +252,9 @@ class ConcurrentTest {
// Note that generation 0 is never inserted, so it is ok if
// <*,0,*> is missing.
ASSERT_TRUE((gen(pos) == 0) ||
(gen(pos) > static_cast<Key>(initial_state.Get(key(pos))))
) << "key: " << key(pos)
<< "; gen: " << gen(pos)
<< "; initgen: "
<< initial_state.Get(key(pos));
(gen(pos) > static_cast<Key>(initial_state.Get(key(pos)))))
<< "key: " << key(pos) << "; gen: " << gen(pos)
<< "; initgen: " << initial_state.Get(key(pos));
// Advance to next key in the valid key space
if (key(pos) < key(current)) {
@ -305,17 +300,10 @@ class TestState {
int seed_;
std::atomic<bool> quit_flag_;
enum ReaderState {
STARTING,
RUNNING,
DONE
};
enum ReaderState { STARTING, RUNNING, DONE };
explicit TestState(int s)
: seed_(s),
quit_flag_(false),
state_(STARTING),
state_cv_(&mu_) {}
: seed_(s), quit_flag_(false), state_(STARTING), state_cv_(&mu_) {}
void Wait(ReaderState s) LOCKS_EXCLUDED(mu_) {
mu_.Lock();
@ -378,6 +366,4 @@ TEST(SkipTest, Concurrent5) { RunConcurrent(5); }
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

10
db/snapshot.h
View File

@ -44,8 +44,14 @@ class SnapshotList {
}
bool empty() const { return head_.next_ == &head_; }
SnapshotImpl* oldest() const { assert(!empty()); return head_.next_; }
SnapshotImpl* newest() const { assert(!empty()); return head_.prev_; }
SnapshotImpl* oldest() const {
assert(!empty());
return head_.next_;
}
SnapshotImpl* newest() const {
assert(!empty());
return head_.prev_;
}
// Creates a SnapshotImpl and appends it to the end of the list.
SnapshotImpl* New(SequenceNumber sequence_number) {

25
db/table_cache.cc
View File

@ -29,18 +29,14 @@ static void UnrefEntry(void* arg1, void* arg2) {
cache->Release(h);
}
TableCache::TableCache(const std::string& dbname,
const Options& options,
TableCache::TableCache(const std::string& dbname, const Options& options,
int entries)
: env_(options.env),
dbname_(dbname),
options_(options),
cache_(NewLRUCache(entries)) {
}
cache_(NewLRUCache(entries)) {}
TableCache::~TableCache() {
delete cache_;
}
TableCache::~TableCache() { delete cache_; }
Status TableCache::FindTable(uint64_t file_number, uint64_t file_size,
Cache::Handle** handle) {
@ -80,8 +76,7 @@ Status TableCache::FindTable(uint64_t file_number, uint64_t file_size,
}
Iterator* TableCache::NewIterator(const ReadOptions& options,
uint64_t file_number,
uint64_t file_size,
uint64_t file_number, uint64_t file_size,
Table** tableptr) {
if (tableptr != nullptr) {
*tableptr = nullptr;
@ -102,17 +97,15 @@ Iterator* TableCache::NewIterator(const ReadOptions& options,
return result;
}
Status TableCache::Get(const ReadOptions& options,
uint64_t file_number,
uint64_t file_size,
const Slice& k,
void* arg,
void (*saver)(void*, const Slice&, const Slice&)) {
Status TableCache::Get(const ReadOptions& options, uint64_t file_number,
uint64_t file_size, const Slice& k, void* arg,
void (*handle_result)(void*, const Slice&,
const Slice&)) {
Cache::Handle* handle = nullptr;
Status s = FindTable(file_number, file_size, &handle);
if (s.ok()) {
Table* t = reinterpret_cast<TableAndFile*>(cache_->Value(handle))->table;
s = t->InternalGet(options, k, arg, saver);
s = t->InternalGet(options, k, arg, handle_result);
cache_->Release(handle);
}
return s;

17
db/table_cache.h
View File

@ -7,8 +7,10 @@
#ifndef STORAGE_LEVELDB_DB_TABLE_CACHE_H_
#define STORAGE_LEVELDB_DB_TABLE_CACHE_H_
#include <string>
#include <stdint.h>
#include <string>
#include "db/dbformat.h"
#include "leveldb/cache.h"
#include "leveldb/table.h"
@ -30,18 +32,13 @@ class TableCache {
// underlies the returned iterator. The returned "*tableptr" object is owned
// by the cache and should not be deleted, and is valid for as long as the
// returned iterator is live.
Iterator* NewIterator(const ReadOptions& options,
uint64_t file_number,
uint64_t file_size,
Table** tableptr = nullptr);
Iterator* NewIterator(const ReadOptions& options, uint64_t file_number,
uint64_t file_size, Table** tableptr = nullptr);
// If a seek to internal key "k" in specified file finds an entry,
// call (*handle_result)(arg, found_key, found_value).
Status Get(const ReadOptions& options,
uint64_t file_number,
uint64_t file_size,
const Slice& k,
void* arg,
Status Get(const ReadOptions& options, uint64_t file_number,
uint64_t file_size, const Slice& k, void* arg,
void (*handle_result)(void*, const Slice&, const Slice&));
// Evict any entry for the specified file number

34
db/version_edit.cc
View File

@ -12,15 +12,15 @@ namespace leveldb {
// Tag numbers for serialized VersionEdit. These numbers are written to
// disk and should not be changed.
enum Tag {
kComparator = 1,
kLogNumber = 2,
kNextFileNumber = 3,
kLastSequence = 4,
kCompactPointer = 5,
kDeletedFile = 6,
kNewFile = 7,
kComparator = 1,
kLogNumber = 2,
kNextFileNumber = 3,
kLastSequence = 4,
kCompactPointer = 5,
kDeletedFile = 6,
kNewFile = 7,
// 8 was used for large value refs
kPrevLogNumber = 9
kPrevLogNumber = 9
};
void VersionEdit::Clear() {
@ -67,8 +67,7 @@ void VersionEdit::EncodeTo(std::string* dst) const {
}
for (DeletedFileSet::const_iterator iter = deleted_files_.begin();
iter != deleted_files_.end();
++iter) {
iter != deleted_files_.end(); ++iter) {
PutVarint32(dst, kDeletedFile);
PutVarint32(dst, iter->first); // level
PutVarint64(dst, iter->second); // file number
@ -97,8 +96,7 @@ static bool GetInternalKey(Slice* input, InternalKey* dst) {
static bool GetLevel(Slice* input, int* level) {
uint32_t v;
if (GetVarint32(input, &v) &&
v < config::kNumLevels) {
if (GetVarint32(input, &v) && v < config::kNumLevels) {
*level = v;
return true;
} else {
@ -163,8 +161,7 @@ Status VersionEdit::DecodeFrom(const Slice& src) {
break;
case kCompactPointer:
if (GetLevel(&input, &level) &&
GetInternalKey(&input, &key)) {
if (GetLevel(&input, &level) && GetInternalKey(&input, &key)) {
compact_pointers_.push_back(std::make_pair(level, key));
} else {
msg = "compaction pointer";
@ -172,8 +169,7 @@ Status VersionEdit::DecodeFrom(const Slice& src) {
break;
case kDeletedFile:
if (GetLevel(&input, &level) &&
GetVarint64(&input, &number)) {
if (GetLevel(&input, &level) && GetVarint64(&input, &number)) {
deleted_files_.insert(std::make_pair(level, number));
} else {
msg = "deleted file";
@ -181,8 +177,7 @@ Status VersionEdit::DecodeFrom(const Slice& src) {
break;
case kNewFile:
if (GetLevel(&input, &level) &&
GetVarint64(&input, &f.number) &&
if (GetLevel(&input, &level) && GetVarint64(&input, &f.number) &&
GetVarint64(&input, &f.file_size) &&
GetInternalKey(&input, &f.smallest) &&
GetInternalKey(&input, &f.largest)) {
@ -239,8 +234,7 @@ std::string VersionEdit::DebugString() const {
r.append(compact_pointers_[i].second.DebugString());
}
for (DeletedFileSet::const_iterator iter = deleted_files_.begin();
iter != deleted_files_.end();
++iter) {
iter != deleted_files_.end(); ++iter) {
r.append("\n DeleteFile: ");
AppendNumberTo(&r, iter->first);
r.append(" ");

25
db/version_edit.h
View File

@ -8,6 +8,7 @@
#include <set>
#include <utility>
#include <vector>
#include "db/dbformat.h"
namespace leveldb {
@ -16,19 +17,19 @@ class VersionSet;
struct FileMetaData {
int refs;
int allowed_seeks; // Seeks allowed until compaction
int allowed_seeks; // Seeks allowed until compaction
uint64_t number;
uint64_t file_size; // File size in bytes
InternalKey smallest; // Smallest internal key served by table
InternalKey largest; // Largest internal key served by table
uint64_t file_size; // File size in bytes
InternalKey smallest; // Smallest internal key served by table
InternalKey largest; // Largest internal key served by table
FileMetaData() : refs(0), allowed_seeks(1 << 30), file_size(0) { }
FileMetaData() : refs(0), allowed_seeks(1 << 30), file_size(0) {}
};
class VersionEdit {
public:
VersionEdit() { Clear(); }
~VersionEdit() { }
~VersionEdit() {}
void Clear();
@ -59,10 +60,8 @@ class VersionEdit {
// Add the specified file at the specified number.
// REQUIRES: This version has not been saved (see VersionSet::SaveTo)
// REQUIRES: "smallest" and "largest" are smallest and largest keys in file
void AddFile(int level, uint64_t file,
uint64_t file_size,
const InternalKey& smallest,
const InternalKey& largest) {
void AddFile(int level, uint64_t file, uint64_t file_size,
const InternalKey& smallest, const InternalKey& largest) {
FileMetaData f;
f.number = file;
f.file_size = file_size;
@ -84,7 +83,7 @@ class VersionEdit {
private:
friend class VersionSet;
typedef std::set< std::pair<int, uint64_t> > DeletedFileSet;
typedef std::set<std::pair<int, uint64_t> > DeletedFileSet;
std::string comparator_;
uint64_t log_number_;
@ -97,9 +96,9 @@ class VersionEdit {
bool has_next_file_number_;
bool has_last_sequence_;
std::vector< std::pair<int, InternalKey> > compact_pointers_;
std::vector<std::pair<int, InternalKey> > compact_pointers_;
DeletedFileSet deleted_files_;
std::vector< std::pair<int, FileMetaData> > new_files_;
std::vector<std::pair<int, FileMetaData> > new_files_;
};
} // namespace leveldb

6
db/version_edit_test.cc
View File

@ -17,7 +17,7 @@ static void TestEncodeDecode(const VersionEdit& edit) {
ASSERT_EQ(encoded, encoded2);
}
class VersionEditTest { };
class VersionEditTest {};
TEST(VersionEditTest, EncodeDecode) {
static const uint64_t kBig = 1ull << 50;
@ -41,6 +41,4 @@ TEST(VersionEditTest, EncodeDecode) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

200
db/version_set.cc
View File

@ -4,8 +4,10 @@
#include "db/version_set.h"
#include <algorithm>
#include <stdio.h>
#include <algorithm>
#include "db/filename.h"
#include "db/log_reader.h"
#include "db/log_writer.h"
@ -84,8 +86,7 @@ Version::~Version() {
}
int FindFile(const InternalKeyComparator& icmp,
const std::vector<FileMetaData*>& files,
const Slice& key) {
const std::vector<FileMetaData*>& files, const Slice& key) {
uint32_t left = 0;
uint32_t right = files.size();
while (left < right) {
@ -104,26 +105,25 @@ int FindFile(const InternalKeyComparator& icmp,
return right;
}
static bool AfterFile(const Comparator* ucmp,
const Slice* user_key, const FileMetaData* f) {
static bool AfterFile(const Comparator* ucmp, const Slice* user_key,
const FileMetaData* f) {
// null user_key occurs before all keys and is therefore never after *f
return (user_key != nullptr &&
ucmp->Compare(*user_key, f->largest.user_key()) > 0);
}
static bool BeforeFile(const Comparator* ucmp,
const Slice* user_key, const FileMetaData* f) {
static bool BeforeFile(const Comparator* ucmp, const Slice* user_key,
const FileMetaData* f) {
// null user_key occurs after all keys and is therefore never before *f
return (user_key != nullptr &&
ucmp->Compare(*user_key, f->smallest.user_key()) < 0);
}
bool SomeFileOverlapsRange(
const InternalKeyComparator& icmp,
bool disjoint_sorted_files,
const std::vector<FileMetaData*>& files,
const Slice* smallest_user_key,
const Slice* largest_user_key) {
bool SomeFileOverlapsRange(const InternalKeyComparator& icmp,
bool disjoint_sorted_files,
const std::vector<FileMetaData*>& files,
const Slice* smallest_user_key,
const Slice* largest_user_key) {
const Comparator* ucmp = icmp.user_comparator();
if (!disjoint_sorted_files) {
// Need to check against all files
@ -143,7 +143,8 @@ bool SomeFileOverlapsRange(
uint32_t index = 0;
if (smallest_user_key != nullptr) {
// Find the earliest possible internal key for smallest_user_key
InternalKey small_key(*smallest_user_key, kMaxSequenceNumber,kValueTypeForSeek);
InternalKey small_key(*smallest_user_key, kMaxSequenceNumber,
kValueTypeForSeek);
index = FindFile(icmp, files, small_key.Encode());
}
@ -164,13 +165,9 @@ class Version::LevelFileNumIterator : public Iterator {
public:
LevelFileNumIterator(const InternalKeyComparator& icmp,
const std::vector<FileMetaData*>* flist)
: icmp_(icmp),
flist_(flist),
index_(flist->size()) { // Marks as invalid
}
virtual bool Valid() const {
return index_ < flist_->size();
: icmp_(icmp), flist_(flist), index_(flist->size()) { // Marks as invalid
}
virtual bool Valid() const { return index_ < flist_->size(); }
virtual void Seek(const Slice& target) {
index_ = FindFile(icmp_, *flist_, target);
}
@ -197,10 +194,11 @@ class Version::LevelFileNumIterator : public Iterator {
Slice value() const {
assert(Valid());
EncodeFixed64(value_buf_, (*flist_)[index_]->number);
EncodeFixed64(value_buf_+8, (*flist_)[index_]->file_size);
EncodeFixed64(value_buf_ + 8, (*flist_)[index_]->file_size);
return Slice(value_buf_, sizeof(value_buf_));
}
virtual Status status() const { return Status::OK(); }
private:
const InternalKeyComparator icmp_;
const std::vector<FileMetaData*>* const flist_;
@ -210,16 +208,14 @@ class Version::LevelFileNumIterator : public Iterator {
mutable char value_buf_[16];
};
static Iterator* GetFileIterator(void* arg,
const ReadOptions& options,
static Iterator* GetFileIterator(void* arg, const ReadOptions& options,
const Slice& file_value) {
TableCache* cache = reinterpret_cast<TableCache*>(arg);
if (file_value.size() != 16) {
return NewErrorIterator(
Status::Corruption("FileReader invoked with unexpected value"));
} else {
return cache->NewIterator(options,
DecodeFixed64(file_value.data()),
return cache->NewIterator(options, DecodeFixed64(file_value.data()),
DecodeFixed64(file_value.data() + 8));
}
}
@ -227,17 +223,16 @@ static Iterator* GetFileIterator(void* arg,
Iterator* Version::NewConcatenatingIterator(const ReadOptions& options,
int level) const {
return NewTwoLevelIterator(
new LevelFileNumIterator(vset_->icmp_, &files_[level]),
&GetFileIterator, vset_->table_cache_, options);
new LevelFileNumIterator(vset_->icmp_, &files_[level]), &GetFileIterator,
vset_->table_cache_, options);
}
void Version::AddIterators(const ReadOptions& options,
std::vector<Iterator*>* iters) {
// Merge all level zero files together since they may overlap
for (size_t i = 0; i < files_[0].size(); i++) {
iters->push_back(
vset_->table_cache_->NewIterator(
options, files_[0][i]->number, files_[0][i]->file_size));
iters->push_back(vset_->table_cache_->NewIterator(
options, files_[0][i]->number, files_[0][i]->file_size));
}
// For levels > 0, we can use a concatenating iterator that sequentially
@ -264,7 +259,7 @@ struct Saver {
Slice user_key;
std::string* value;
};
}
} // namespace
static void SaveValue(void* arg, const Slice& ikey, const Slice& v) {
Saver* s = reinterpret_cast<Saver*>(arg);
ParsedInternalKey parsed_key;
@ -284,8 +279,7 @@ static bool NewestFirst(FileMetaData* a, FileMetaData* b) {
return a->number > b->number;
}
void Version::ForEachOverlapping(Slice user_key, Slice internal_key,
void* arg,
void Version::ForEachOverlapping(Slice user_key, Slice internal_key, void* arg,
bool (*func)(void*, int, FileMetaData*)) {
// TODO(sanjay): Change Version::Get() to use this function.
const Comparator* ucmp = vset_->icmp_.user_comparator();
@ -329,10 +323,8 @@ void Version::ForEachOverlapping(Slice user_key, Slice internal_key,
}
}
Status Version::Get(const ReadOptions& options,
const LookupKey& k,
std::string* value,
GetStats* stats) {
Status Version::Get(const ReadOptions& options, const LookupKey& k,
std::string* value, GetStats* stats) {
Slice ikey = k.internal_key();
Slice user_key = k.user_key();
const Comparator* ucmp = vset_->icmp_.user_comparator();
@ -405,14 +397,14 @@ Status Version::Get(const ReadOptions& options,
saver.ucmp = ucmp;
saver.user_key = user_key;
saver.value = value;
s = vset_->table_cache_->Get(options, f->number, f->file_size,
ikey, &saver, SaveValue);
s = vset_->table_cache_->Get(options, f->number, f->file_size, ikey,
&saver, SaveValue);
if (!s.ok()) {
return s;
}
switch (saver.state) {
case kNotFound:
break; // Keep searching in other files
break; // Keep searching in other files
case kFound:
return s;
case kDeleted:
@ -479,9 +471,7 @@ bool Version::RecordReadSample(Slice internal_key) {
return false;
}
void Version::Ref() {
++refs_;
}
void Version::Ref() { ++refs_; }
void Version::Unref() {
assert(this != &vset_->dummy_versions_);
@ -492,16 +482,14 @@ void Version::Unref() {
}
}
bool Version::OverlapInLevel(int level,
const Slice* smallest_user_key,
bool Version::OverlapInLevel(int level, const Slice* smallest_user_key,
const Slice* largest_user_key) {
return SomeFileOverlapsRange(vset_->icmp_, (level > 0), files_[level],
smallest_user_key, largest_user_key);
}
int Version::PickLevelForMemTableOutput(
const Slice& smallest_user_key,
const Slice& largest_user_key) {
int Version::PickLevelForMemTableOutput(const Slice& smallest_user_key,
const Slice& largest_user_key) {
int level = 0;
if (!OverlapInLevel(0, &smallest_user_key, &largest_user_key)) {
// Push to next level if there is no overlap in next level,
@ -528,11 +516,9 @@ int Version::PickLevelForMemTableOutput(
}
// Store in "*inputs" all files in "level" that overlap [begin,end]
void Version::GetOverlappingInputs(
int level,
const InternalKey* begin,
const InternalKey* end,
std::vector<FileMetaData*>* inputs) {
void Version::GetOverlappingInputs(int level, const InternalKey* begin,
const InternalKey* end,
std::vector<FileMetaData*>* inputs) {
assert(level >= 0);
assert(level < config::kNumLevels);
inputs->clear();
@ -544,7 +530,7 @@ void Version::GetOverlappingInputs(
user_end = end->user_key();
}
const Comparator* user_cmp = vset_->icmp_.user_comparator();
for (size_t i = 0; i < files_[level].size(); ) {
for (size_t i = 0; i < files_[level].size();) {
FileMetaData* f = files_[level][i++];
const Slice file_start = f->smallest.user_key();
const Slice file_limit = f->largest.user_key();
@ -561,8 +547,8 @@ void Version::GetOverlappingInputs(
user_begin = file_start;
inputs->clear();
i = 0;
} else if (end != nullptr && user_cmp->Compare(file_limit,
user_end) > 0) {
} else if (end != nullptr &&
user_cmp->Compare(file_limit, user_end) > 0) {
user_end = file_limit;
inputs->clear();
i = 0;
@ -630,9 +616,7 @@ class VersionSet::Builder {
public:
// Initialize a builder with the files from *base and other info from *vset
Builder(VersionSet* vset, Version* base)
: vset_(vset),
base_(base) {
Builder(VersionSet* vset, Version* base) : vset_(vset), base_(base) {
base_->Ref();
BySmallestKey cmp;
cmp.internal_comparator = &vset_->icmp_;
@ -646,8 +630,8 @@ class VersionSet::Builder {
const FileSet* added = levels_[level].added_files;
std::vector<FileMetaData*> to_unref;
to_unref.reserve(added->size());
for (FileSet::const_iterator it = added->begin();
it != added->end(); ++it) {
for (FileSet::const_iterator it = added->begin(); it != added->end();
++it) {
to_unref.push_back(*it);
}
delete added;
@ -674,8 +658,7 @@ class VersionSet::Builder {
// Delete files
const VersionEdit::DeletedFileSet& del = edit->deleted_files_;
for (VersionEdit::DeletedFileSet::const_iterator iter = del.begin();
iter != del.end();
++iter) {
iter != del.end(); ++iter) {
const int level = iter->first;
const uint64_t number = iter->second;
levels_[level].deleted_files.insert(number);
@ -721,13 +704,11 @@ class VersionSet::Builder {
const FileSet* added = levels_[level].added_files;
v->files_[level].reserve(base_files.size() + added->size());
for (FileSet::const_iterator added_iter = added->begin();
added_iter != added->end();
++added_iter) {
added_iter != added->end(); ++added_iter) {
// Add all smaller files listed in base_
for (std::vector<FileMetaData*>::const_iterator bpos
= std::upper_bound(base_iter, base_end, *added_iter, cmp);
base_iter != bpos;
++base_iter) {
for (std::vector<FileMetaData*>::const_iterator bpos =
std::upper_bound(base_iter, base_end, *added_iter, cmp);
base_iter != bpos; ++base_iter) {
MaybeAddFile(v, level, *base_iter);
}
@ -743,7 +724,7 @@ class VersionSet::Builder {
// Make sure there is no overlap in levels > 0
if (level > 0) {
for (uint32_t i = 1; i < v->files_[level].size(); i++) {
const InternalKey& prev_end = v->files_[level][i-1]->largest;
const InternalKey& prev_end = v->files_[level][i - 1]->largest;
const InternalKey& this_begin = v->files_[level][i]->smallest;
if (vset_->icmp_.Compare(prev_end, this_begin) >= 0) {
fprintf(stderr, "overlapping ranges in same level %s vs. %s\n",
@ -764,7 +745,7 @@ class VersionSet::Builder {
std::vector<FileMetaData*>* files = &v->files_[level];
if (level > 0 && !files->empty()) {
// Must not overlap
assert(vset_->icmp_.Compare((*files)[files->size()-1]->largest,
assert(vset_->icmp_.Compare((*files)[files->size() - 1]->largest,
f->smallest) < 0);
}
f->refs++;
@ -773,8 +754,7 @@ class VersionSet::Builder {
}
};
VersionSet::VersionSet(const std::string& dbname,
const Options* options,
VersionSet::VersionSet(const std::string& dbname, const Options* options,
TableCache* table_cache,
const InternalKeyComparator* cmp)
: env_(options->env),
@ -903,7 +883,7 @@ Status VersionSet::LogAndApply(VersionEdit* edit, port::Mutex* mu) {
return s;
}
Status VersionSet::Recover(bool *save_manifest) {
Status VersionSet::Recover(bool* save_manifest) {
struct LogReporter : public log::Reader::Reporter {
Status* status;
virtual void Corruption(size_t bytes, const Status& s) {
@ -917,7 +897,7 @@ Status VersionSet::Recover(bool *save_manifest) {
if (!s.ok()) {
return s;
}
if (current.empty() || current[current.size()-1] != '\n') {
if (current.empty() || current[current.size() - 1] != '\n') {
return Status::Corruption("CURRENT file does not end with newline");
}
current.resize(current.size() - 1);
@ -927,8 +907,8 @@ Status VersionSet::Recover(bool *save_manifest) {
s = env_->NewSequentialFile(dscname, &file);
if (!s.ok()) {
if (s.IsNotFound()) {
return Status::Corruption(
"CURRENT points to a non-existent file", s.ToString());
return Status::Corruption("CURRENT points to a non-existent file",
s.ToString());
}
return s;
}
@ -946,7 +926,8 @@ Status VersionSet::Recover(bool *save_manifest) {
{
LogReporter reporter;
reporter.status = &s;
log::Reader reader(file, &reporter, true/*checksum*/, 0/*initial_offset*/);
log::Reader reader(file, &reporter, true /*checksum*/,
0 /*initial_offset*/);
Slice record;
std::string scratch;
while (reader.ReadRecord(&record, &scratch) && s.ok()) {
@ -1071,7 +1052,7 @@ void VersionSet::Finalize(Version* v) {
int best_level = -1;
double best_score = -1;
for (int level = 0; level < config::kNumLevels-1; level++) {
for (int level = 0; level < config::kNumLevels - 1; level++) {
double score;
if (level == 0) {
// We treat level-0 specially by bounding the number of files
@ -1086,7 +1067,7 @@ void VersionSet::Finalize(Version* v) {
// setting, or very high compression ratios, or lots of
// overwrites/deletions).
score = v->files_[level].size() /
static_cast<double>(config::kL0_CompactionTrigger);
static_cast<double>(config::kL0_CompactionTrigger);
} else {
// Compute the ratio of current size to size limit.
const uint64_t level_bytes = TotalFileSize(v->files_[level]);
@ -1142,16 +1123,12 @@ int VersionSet::NumLevelFiles(int level) const {
const char* VersionSet::LevelSummary(LevelSummaryStorage* scratch) const {
// Update code if kNumLevels changes
assert(config::kNumLevels == 7);
static_assert(config::kNumLevels == 7, "");
snprintf(scratch->buffer, sizeof(scratch->buffer),
"files[ %d %d %d %d %d %d %d ]",
int(current_->files_[0].size()),
int(current_->files_[1].size()),
int(current_->files_[2].size()),
int(current_->files_[3].size()),
int(current_->files_[4].size()),
int(current_->files_[5].size()),
int(current_->files_[6].size()));
"files[ %d %d %d %d %d %d %d ]", int(current_->files_[0].size()),
int(current_->files_[1].size()), int(current_->files_[2].size()),
int(current_->files_[3].size()), int(current_->files_[4].size()),
int(current_->files_[5].size()), int(current_->files_[6].size()));
return scratch->buffer;
}
@ -1188,8 +1165,7 @@ uint64_t VersionSet::ApproximateOffsetOf(Version* v, const InternalKey& ikey) {
}
void VersionSet::AddLiveFiles(std::set<uint64_t>* live) {
for (Version* v = dummy_versions_.next_;
v != &dummy_versions_;
for (Version* v = dummy_versions_.next_; v != &dummy_versions_;
v = v->next_) {
for (int level = 0; level < config::kNumLevels; level++) {
const std::vector<FileMetaData*>& files = v->files_[level];
@ -1212,7 +1188,7 @@ int64_t VersionSet::MaxNextLevelOverlappingBytes() {
for (int level = 1; level < config::kNumLevels - 1; level++) {
for (size_t i = 0; i < current_->files_[level].size(); i++) {
const FileMetaData* f = current_->files_[level][i];
current_->GetOverlappingInputs(level+1, &f->smallest, &f->largest,
current_->GetOverlappingInputs(level + 1, &f->smallest, &f->largest,
&overlaps);
const int64_t sum = TotalFileSize(overlaps);
if (sum > result) {
@ -1227,8 +1203,7 @@ int64_t VersionSet::MaxNextLevelOverlappingBytes() {
// *smallest, *largest.
// REQUIRES: inputs is not empty
void VersionSet::GetRange(const std::vector<FileMetaData*>& inputs,
InternalKey* smallest,
InternalKey* largest) {
InternalKey* smallest, InternalKey* largest) {
assert(!inputs.empty());
smallest->Clear();
largest->Clear();
@ -1253,8 +1228,7 @@ void VersionSet::GetRange(const std::vector<FileMetaData*>& inputs,
// REQUIRES: inputs is not empty
void VersionSet::GetRange2(const std::vector<FileMetaData*>& inputs1,
const std::vector<FileMetaData*>& inputs2,
InternalKey* smallest,
InternalKey* largest) {
InternalKey* smallest, InternalKey* largest) {
std::vector<FileMetaData*> all = inputs1;
all.insert(all.end(), inputs2.begin(), inputs2.end());
GetRange(all, smallest, largest);
@ -1276,8 +1250,8 @@ Iterator* VersionSet::MakeInputIterator(Compaction* c) {
if (c->level() + which == 0) {
const std::vector<FileMetaData*>& files = c->inputs_[which];
for (size_t i = 0; i < files.size(); i++) {
list[num++] = table_cache_->NewIterator(
options, files[i]->number, files[i]->file_size);
list[num++] = table_cache_->NewIterator(options, files[i]->number,
files[i]->file_size);
}
} else {
// Create concatenating iterator for the files from this level
@ -1304,7 +1278,7 @@ Compaction* VersionSet::PickCompaction() {
if (size_compaction) {
level = current_->compaction_level_;
assert(level >= 0);
assert(level+1 < config::kNumLevels);
assert(level + 1 < config::kNumLevels);
c = new Compaction(options_, level);
// Pick the first file that comes after compact_pointer_[level]
@ -1433,7 +1407,8 @@ void VersionSet::SetupOtherInputs(Compaction* c) {
AddBoundaryInputs(icmp_, current_->files_[level], &c->inputs_[0]);
GetRange(c->inputs_[0], &smallest, &largest);
current_->GetOverlappingInputs(level+1, &smallest, &largest, &c->inputs_[1]);
current_->GetOverlappingInputs(level + 1, &smallest, &largest,
&c->inputs_[1]);
// Get entire range covered by compaction
InternalKey all_start, all_limit;
@ -1454,18 +1429,14 @@ void VersionSet::SetupOtherInputs(Compaction* c) {
InternalKey new_start, new_limit;
GetRange(expanded0, &new_start, &new_limit);
std::vector<FileMetaData*> expanded1;
current_->GetOverlappingInputs(level+1, &new_start, &new_limit,
current_->GetOverlappingInputs(level + 1, &new_start, &new_limit,
&expanded1);
if (expanded1.size() == c->inputs_[1].size()) {
Log(options_->info_log,
"Expanding@%d %d+%d (%ld+%ld bytes) to %d+%d (%ld+%ld bytes)\n",
level,
int(c->inputs_[0].size()),
int(c->inputs_[1].size()),
long(inputs0_size), long(inputs1_size),
int(expanded0.size()),
int(expanded1.size()),
long(expanded0_size), long(inputs1_size));
level, int(c->inputs_[0].size()), int(c->inputs_[1].size()),
long(inputs0_size), long(inputs1_size), int(expanded0.size()),
int(expanded1.size()), long(expanded0_size), long(inputs1_size));
smallest = new_start;
largest = new_limit;
c->inputs_[0] = expanded0;
@ -1490,10 +1461,8 @@ void VersionSet::SetupOtherInputs(Compaction* c) {
c->edit_.SetCompactPointer(level, largest);
}
Compaction* VersionSet::CompactRange(
int level,
const InternalKey* begin,
const InternalKey* end) {
Compaction* VersionSet::CompactRange(int level, const InternalKey* begin,
const InternalKey* end) {
std::vector<FileMetaData*> inputs;
current_->GetOverlappingInputs(level, begin, end, &inputs);
if (inputs.empty()) {
@ -1566,7 +1535,7 @@ bool Compaction::IsBaseLevelForKey(const Slice& user_key) {
const Comparator* user_cmp = input_version_->vset_->icmp_.user_comparator();
for (int lvl = level_ + 2; lvl < config::kNumLevels; lvl++) {
const std::vector<FileMetaData*>& files = input_version_->files_[lvl];
for (; level_ptrs_[lvl] < files.size(); ) {
for (; level_ptrs_[lvl] < files.size();) {
FileMetaData* f = files[level_ptrs_[lvl]];
if (user_cmp->Compare(user_key, f->largest.user_key()) <= 0) {
// We've advanced far enough
@ -1587,8 +1556,9 @@ bool Compaction::ShouldStopBefore(const Slice& internal_key) {
// Scan to find earliest grandparent file that contains key.
const InternalKeyComparator* icmp = &vset->icmp_;
while (grandparent_index_ < grandparents_.size() &&
icmp->Compare(internal_key,
grandparents_[grandparent_index_]->largest.Encode()) > 0) {
icmp->Compare(internal_key,
grandparents_[grandparent_index_]->largest.Encode()) >
0) {
if (seen_key_) {
overlapped_bytes_ += grandparents_[grandparent_index_]->file_size;
}

56
db/version_set.h
View File

@ -18,6 +18,7 @@
#include <map>
#include <set>
#include <vector>
#include "db/dbformat.h"
#include "db/version_edit.h"
#include "port/port.h"
@ -25,7 +26,9 @@
namespace leveldb {
namespace log { class Writer; }
namespace log {
class Writer;
}
class Compaction;
class Iterator;
@ -40,8 +43,7 @@ class WritableFile;
// Return files.size() if there is no such file.
// REQUIRES: "files" contains a sorted list of non-overlapping files.
int FindFile(const InternalKeyComparator& icmp,
const std::vector<FileMetaData*>& files,
const Slice& key);
const std::vector<FileMetaData*>& files, const Slice& key);
// Returns true iff some file in "files" overlaps the user key range
// [*smallest,*largest].
@ -90,16 +92,15 @@ class Version {
void GetOverlappingInputs(
int level,
const InternalKey* begin, // nullptr means before all keys
const InternalKey* end, // nullptr means after all keys
const InternalKey* begin, // nullptr means before all keys
const InternalKey* end, // nullptr means after all keys
std::vector<FileMetaData*>* inputs);
// Returns true iff some file in the specified level overlaps
// some part of [*smallest_user_key,*largest_user_key].
// smallest_user_key==nullptr represents a key smaller than all the DB's keys.
// largest_user_key==nullptr represents a key largest than all the DB's keys.
bool OverlapInLevel(int level,
const Slice* smallest_user_key,
bool OverlapInLevel(int level, const Slice* smallest_user_key,
const Slice* largest_user_key);
// Return the level at which we should place a new memtable compaction
@ -124,14 +125,13 @@ class Version {
// false, makes no more calls.
//
// REQUIRES: user portion of internal_key == user_key.
void ForEachOverlapping(Slice user_key, Slice internal_key,
void* arg,
void ForEachOverlapping(Slice user_key, Slice internal_key, void* arg,
bool (*func)(void*, int, FileMetaData*));
VersionSet* vset_; // VersionSet to which this Version belongs
Version* next_; // Next version in linked list
Version* prev_; // Previous version in linked list
int refs_; // Number of live refs to this version
VersionSet* vset_; // VersionSet to which this Version belongs
Version* next_; // Next version in linked list
Version* prev_; // Previous version in linked list
int refs_; // Number of live refs to this version
// List of files per level
std::vector<FileMetaData*> files_[config::kNumLevels];
@ -147,12 +147,14 @@ class Version {
int compaction_level_;
explicit Version(VersionSet* vset)
: vset_(vset), next_(this), prev_(this), refs_(0),
: vset_(vset),
next_(this),
prev_(this),
refs_(0),
file_to_compact_(nullptr),
file_to_compact_level_(-1),
compaction_score_(-1),
compaction_level_(-1) {
}
compaction_level_(-1) {}
~Version();
@ -163,10 +165,8 @@ class Version {
class VersionSet {
public:
VersionSet(const std::string& dbname,
const Options* options,
TableCache* table_cache,
const InternalKeyComparator*);
VersionSet(const std::string& dbname, const Options* options,
TableCache* table_cache, const InternalKeyComparator*);
~VersionSet();
// Apply *edit to the current version to form a new descriptor that
@ -178,7 +178,7 @@ class VersionSet {
EXCLUSIVE_LOCKS_REQUIRED(mu);
// Recover the last saved descriptor from persistent storage.
Status Recover(bool *save_manifest);
Status Recover(bool* save_manifest);
// Return the current version.
Version* current() const { return current_; }
@ -233,10 +233,8 @@ class VersionSet {
// the specified level. Returns nullptr if there is nothing in that
// level that overlaps the specified range. Caller should delete
// the result.
Compaction* CompactRange(
int level,
const InternalKey* begin,
const InternalKey* end);
Compaction* CompactRange(int level, const InternalKey* begin,
const InternalKey* end);
// Return the maximum overlapping data (in bytes) at next level for any
// file at a level >= 1.
@ -277,14 +275,12 @@ class VersionSet {
void Finalize(Version* v);
void GetRange(const std::vector<FileMetaData*>& inputs,
InternalKey* smallest,
void GetRange(const std::vector<FileMetaData*>& inputs, InternalKey* smallest,
InternalKey* largest);
void GetRange2(const std::vector<FileMetaData*>& inputs1,
const std::vector<FileMetaData*>& inputs2,
InternalKey* smallest,
InternalKey* largest);
InternalKey* smallest, InternalKey* largest);
void SetupOtherInputs(Compaction* c);
@ -373,7 +369,7 @@ class Compaction {
VersionEdit edit_;
// Each compaction reads inputs from "level_" and "level_+1"
std::vector<FileMetaData*> inputs_[2]; // The two sets of inputs
std::vector<FileMetaData*> inputs_[2]; // The two sets of inputs
// State used to check for number of overlapping grandparent files
// (parent == level_ + 1, grandparent == level_ + 2)

39
db/version_set_test.cc
View File

@ -14,7 +14,7 @@ class FindFileTest {
std::vector<FileMetaData*> files_;
bool disjoint_sorted_files_;
FindFileTest() : disjoint_sorted_files_(true) { }
FindFileTest() : disjoint_sorted_files_(true) {}
~FindFileTest() {
for (int i = 0; i < files_.size(); i++) {
@ -50,10 +50,10 @@ class FindFileTest {
TEST(FindFileTest, Empty) {
ASSERT_EQ(0, Find("foo"));
ASSERT_TRUE(! Overlaps("a", "z"));
ASSERT_TRUE(! Overlaps(nullptr, "z"));
ASSERT_TRUE(! Overlaps("a", nullptr));
ASSERT_TRUE(! Overlaps(nullptr, nullptr));
ASSERT_TRUE(!Overlaps("a", "z"));
ASSERT_TRUE(!Overlaps(nullptr, "z"));
ASSERT_TRUE(!Overlaps("a", nullptr));
ASSERT_TRUE(!Overlaps(nullptr, nullptr));
}
TEST(FindFileTest, Single) {
@ -65,8 +65,8 @@ TEST(FindFileTest, Single) {
ASSERT_EQ(1, Find("q1"));
ASSERT_EQ(1, Find("z"));
ASSERT_TRUE(! Overlaps("a", "b"));
ASSERT_TRUE(! Overlaps("z1", "z2"));
ASSERT_TRUE(!Overlaps("a", "b"));
ASSERT_TRUE(!Overlaps("z1", "z2"));
ASSERT_TRUE(Overlaps("a", "p"));
ASSERT_TRUE(Overlaps("a", "q"));
ASSERT_TRUE(Overlaps("a", "z"));
@ -78,15 +78,14 @@ TEST(FindFileTest, Single) {
ASSERT_TRUE(Overlaps("q", "q"));
ASSERT_TRUE(Overlaps("q", "q1"));
ASSERT_TRUE(! Overlaps(nullptr, "j"));
ASSERT_TRUE(! Overlaps("r", nullptr));
ASSERT_TRUE(!Overlaps(nullptr, "j"));
ASSERT_TRUE(!Overlaps("r", nullptr));
ASSERT_TRUE(Overlaps(nullptr, "p"));
ASSERT_TRUE(Overlaps(nullptr, "p1"));
ASSERT_TRUE(Overlaps("q", nullptr));
ASSERT_TRUE(Overlaps(nullptr, nullptr));
}
TEST(FindFileTest, Multiple) {
Add("150", "200");
Add("200", "250");
@ -110,10 +109,10 @@ TEST(FindFileTest, Multiple) {
ASSERT_EQ(3, Find("450"));
ASSERT_EQ(4, Find("451"));
ASSERT_TRUE(! Overlaps("100", "149"));
ASSERT_TRUE(! Overlaps("251", "299"));
ASSERT_TRUE(! Overlaps("451", "500"));
ASSERT_TRUE(! Overlaps("351", "399"));
ASSERT_TRUE(!Overlaps("100", "149"));
ASSERT_TRUE(!Overlaps("251", "299"));
ASSERT_TRUE(!Overlaps("451", "500"));
ASSERT_TRUE(!Overlaps("351", "399"));
ASSERT_TRUE(Overlaps("100", "150"));
ASSERT_TRUE(Overlaps("100", "200"));
@ -130,8 +129,8 @@ TEST(FindFileTest, MultipleNullBoundaries) {
Add("200", "250");
Add("300", "350");
Add("400", "450");
ASSERT_TRUE(! Overlaps(nullptr, "149"));
ASSERT_TRUE(! Overlaps("451", nullptr));
ASSERT_TRUE(!Overlaps(nullptr, "149"));
ASSERT_TRUE(!Overlaps("451", nullptr));
ASSERT_TRUE(Overlaps(nullptr, nullptr));
ASSERT_TRUE(Overlaps(nullptr, "150"));
ASSERT_TRUE(Overlaps(nullptr, "199"));
@ -147,8 +146,8 @@ TEST(FindFileTest, MultipleNullBoundaries) {
TEST(FindFileTest, OverlapSequenceChecks) {
Add("200", "200", 5000, 3000);
ASSERT_TRUE(! Overlaps("199", "199"));
ASSERT_TRUE(! Overlaps("201", "300"));
ASSERT_TRUE(!Overlaps("199", "199"));
ASSERT_TRUE(!Overlaps("201", "300"));
ASSERT_TRUE(Overlaps("200", "200"));
ASSERT_TRUE(Overlaps("190", "200"));
ASSERT_TRUE(Overlaps("200", "210"));
@ -158,8 +157,8 @@ TEST(FindFileTest, OverlappingFiles) {
Add("150", "600");
Add("400", "500");
disjoint_sorted_files_ = false;
ASSERT_TRUE(! Overlaps("100", "149"));
ASSERT_TRUE(! Overlaps("601", "700"));
ASSERT_TRUE(!Overlaps("100", "149"));
ASSERT_TRUE(!Overlaps("601", "700"));
ASSERT_TRUE(Overlaps("100", "150"));
ASSERT_TRUE(Overlaps("100", "200"));
ASSERT_TRUE(Overlaps("100", "300"));

19
db/write_batch.cc
View File

@ -15,10 +15,10 @@
#include "leveldb/write_batch.h"
#include "leveldb/db.h"
#include "db/dbformat.h"
#include "db/memtable.h"
#include "db/write_batch_internal.h"
#include "leveldb/db.h"
#include "util/coding.h"
namespace leveldb {
@ -26,22 +26,18 @@ namespace leveldb {
// WriteBatch header has an 8-byte sequence number followed by a 4-byte count.
static const size_t kHeader = 12;
WriteBatch::WriteBatch() {
Clear();
}
WriteBatch::WriteBatch() { Clear(); }
WriteBatch::~WriteBatch() { }
WriteBatch::~WriteBatch() {}
WriteBatch::Handler::~Handler() { }
WriteBatch::Handler::~Handler() {}
void WriteBatch::Clear() {
rep_.clear();
rep_.resize(kHeader);
}
size_t WriteBatch::ApproximateSize() const {
return rep_.size();
}
size_t WriteBatch::ApproximateSize() const { return rep_.size(); }
Status WriteBatch::Iterate(Handler* handler) const {
Slice input(rep_);
@ -112,7 +108,7 @@ void WriteBatch::Delete(const Slice& key) {
PutLengthPrefixedSlice(&rep_, key);
}
void WriteBatch::Append(const WriteBatch &source) {
void WriteBatch::Append(const WriteBatch& source) {
WriteBatchInternal::Append(this, &source);
}
@ -133,8 +129,7 @@ class MemTableInserter : public WriteBatch::Handler {
};
} // namespace
Status WriteBatchInternal::InsertInto(const WriteBatch* b,
MemTable* memtable) {
Status WriteBatchInternal::InsertInto(const WriteBatch* b, MemTable* memtable) {
MemTableInserter inserter;
inserter.sequence_ = WriteBatchInternal::Sequence(b);
inserter.mem_ = memtable;

9
db/write_batch_internal.h
View File

@ -29,13 +29,9 @@ class WriteBatchInternal {
// this batch.
static void SetSequence(WriteBatch* batch, SequenceNumber seq);
static Slice Contents(const WriteBatch* batch) {
return Slice(batch->rep_);
}
static Slice Contents(const WriteBatch* batch) { return Slice(batch->rep_); }
static size_t ByteSize(const WriteBatch* batch) {
return batch->rep_.size();
}
static size_t ByteSize(const WriteBatch* batch) { return batch->rep_.size(); }
static void SetContents(WriteBatch* batch, const Slice& contents);
@ -46,5 +42,4 @@ class WriteBatchInternal {
} // namespace leveldb
#endif // STORAGE_LEVELDB_DB_WRITE_BATCH_INTERNAL_H_

48
db/write_batch_test.cc
View File

@ -52,7 +52,7 @@ static std::string PrintContents(WriteBatch* b) {
return state;
}
class WriteBatchTest { };
class WriteBatchTest {};
TEST(WriteBatchTest, Empty) {
WriteBatch batch;
@ -68,10 +68,11 @@ TEST(WriteBatchTest, Multiple) {
WriteBatchInternal::SetSequence(&batch, 100);
ASSERT_EQ(100, WriteBatchInternal::Sequence(&batch));
ASSERT_EQ(3, WriteBatchInternal::Count(&batch));
ASSERT_EQ("Put(baz, boo)@102"
"Delete(box)@101"
"Put(foo, bar)@100",
PrintContents(&batch));
ASSERT_EQ(
"Put(baz, boo)@102"
"Delete(box)@101"
"Put(foo, bar)@100",
PrintContents(&batch));
}
TEST(WriteBatchTest, Corruption) {
@ -81,10 +82,11 @@ TEST(WriteBatchTest, Corruption) {
WriteBatchInternal::SetSequence(&batch, 200);
Slice contents = WriteBatchInternal::Contents(&batch);
WriteBatchInternal::SetContents(&batch,
Slice(contents.data(),contents.size()-1));
ASSERT_EQ("Put(foo, bar)@200"
"ParseError()",
PrintContents(&batch));
Slice(contents.data(), contents.size() - 1));
ASSERT_EQ(
"Put(foo, bar)@200"
"ParseError()",
PrintContents(&batch));
}
TEST(WriteBatchTest, Append) {
@ -92,25 +94,25 @@ TEST(WriteBatchTest, Append) {
WriteBatchInternal::SetSequence(&b1, 200);
WriteBatchInternal::SetSequence(&b2, 300);
b1.Append(b2);
ASSERT_EQ("",
PrintContents(&b1));
ASSERT_EQ("", PrintContents(&b1));
b2.Put("a", "va");
b1.Append(b2);
ASSERT_EQ("Put(a, va)@200",
PrintContents(&b1));
ASSERT_EQ("Put(a, va)@200", PrintContents(&b1));
b2.Clear();
b2.Put("b", "vb");
b1.Append(b2);
ASSERT_EQ("Put(a, va)@200"
"Put(b, vb)@201",
PrintContents(&b1));
ASSERT_EQ(
"Put(a, va)@200"
"Put(b, vb)@201",
PrintContents(&b1));
b2.Delete("foo");
b1.Append(b2);
ASSERT_EQ("Put(a, va)@200"
"Put(b, vb)@202"
"Put(b, vb)@201"
"Delete(foo)@203",
PrintContents(&b1));
ASSERT_EQ(
"Put(a, va)@200"
"Put(b, vb)@202"
"Put(b, vb)@201"
"Delete(foo)@203",
PrintContents(&b1));
}
TEST(WriteBatchTest, ApproximateSize) {
@ -132,6 +134,4 @@ TEST(WriteBatchTest, ApproximateSize) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

141
doc/bench/db_bench_sqlite3.cc
View File

@ -2,9 +2,10 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <sqlite3.h>
#include <stdio.h>
#include <stdlib.h>
#include <sqlite3.h>
#include "util/histogram.h"
#include "util/random.h"
#include "util/testutil.h"
@ -38,8 +39,7 @@ static const char* FLAGS_benchmarks =
"fillrand100K,"
"fillseq100K,"
"readseq,"
"readrand100K,"
;
"readrand100K,";
// Number of key/values to place in database
static int FLAGS_num = 1000000;
@ -78,8 +78,7 @@ static bool FLAGS_WAL_enabled = true;
// Use the db with the following name.
static const char* FLAGS_db = nullptr;
inline
static void ExecErrorCheck(int status, char *err_msg) {
inline static void ExecErrorCheck(int status, char* err_msg) {
if (status != SQLITE_OK) {
fprintf(stderr, "SQL error: %s\n", err_msg);
sqlite3_free(err_msg);
@ -87,24 +86,21 @@ static void ExecErrorCheck(int status, char *err_msg) {
}
}
inline
static void StepErrorCheck(int status) {
inline static void StepErrorCheck(int status) {
if (status != SQLITE_DONE) {
fprintf(stderr, "SQL step error: status = %d\n", status);
exit(1);
}
}
inline
static void ErrorCheck(int status) {
inline static void ErrorCheck(int status) {
if (status != SQLITE_OK) {
fprintf(stderr, "sqlite3 error: status = %d\n", status);
exit(1);
}
}
inline
static void WalCheckpoint(sqlite3* db_) {
inline static void WalCheckpoint(sqlite3* db_) {
// Flush all writes to disk
if (FLAGS_WAL_enabled) {
sqlite3_wal_checkpoint_v2(db_, nullptr, SQLITE_CHECKPOINT_FULL, nullptr,
@ -153,7 +149,7 @@ static Slice TrimSpace(Slice s) {
start++;
}
int limit = s.size();
while (limit > start && isspace(s[limit-1])) {
while (limit > start && isspace(s[limit - 1])) {
limit--;
}
return Slice(s.data() + start, limit - start);
@ -177,7 +173,7 @@ class Benchmark {
// State kept for progress messages
int done_;
int next_report_; // When to report next
int next_report_; // When to report next
void PrintHeader() {
const int kKeySize = 16;
@ -186,17 +182,17 @@ class Benchmark {
fprintf(stdout, "Values: %d bytes each\n", FLAGS_value_size);
fprintf(stdout, "Entries: %d\n", num_);
fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_)
/ 1048576.0));
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
PrintWarnings();
fprintf(stdout, "------------------------------------------------\n");
}
void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
fprintf(stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n"
);
fprintf(
stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
fprintf(stdout,
@ -262,13 +258,20 @@ class Benchmark {
done_++;
if (done_ >= next_report_) {
if (next_report_ < 1000) next_report_ += 100;
else if (next_report_ < 5000) next_report_ += 500;
else if (next_report_ < 10000) next_report_ += 1000;
else if (next_report_ < 50000) next_report_ += 5000;
else if (next_report_ < 100000) next_report_ += 10000;
else if (next_report_ < 500000) next_report_ += 50000;
else next_report_ += 100000;
if (next_report_ < 1000)
next_report_ += 100;
else if (next_report_ < 5000)
next_report_ += 500;
else if (next_report_ < 10000)
next_report_ += 1000;
else if (next_report_ < 50000)
next_report_ += 5000;
else if (next_report_ < 100000)
next_report_ += 10000;
else if (next_report_ < 500000)
next_report_ += 50000;
else
next_report_ += 100000;
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
fflush(stderr);
}
@ -286,16 +289,14 @@ class Benchmark {
snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / (finish - start_));
if (!message_.empty()) {
message_ = std::string(rate) + " " + message_;
message_ = std::string(rate) + " " + message_;
} else {
message_ = rate;
}
}
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
name.ToString().c_str(),
(finish - start_) * 1e6 / done_,
(message_.empty() ? "" : " "),
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", name.ToString().c_str(),
(finish - start_) * 1e6 / done_, (message_.empty() ? "" : " "),
message_.c_str());
if (FLAGS_histogram) {
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
@ -304,22 +305,16 @@ class Benchmark {
}
public:
enum Order {
SEQUENTIAL,
RANDOM
};
enum DBState {
FRESH,
EXISTING
};
enum Order { SEQUENTIAL, RANDOM };
enum DBState { FRESH, EXISTING };
Benchmark()
: db_(nullptr),
db_num_(0),
num_(FLAGS_num),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
bytes_(0),
rand_(301) {
: db_(nullptr),
db_num_(0),
num_(FLAGS_num),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
bytes_(0),
rand_(301) {
std::vector<std::string> files;
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
@ -426,10 +421,8 @@ class Benchmark {
// Open database
std::string tmp_dir;
Env::Default()->GetTestDirectory(&tmp_dir);
snprintf(file_name, sizeof(file_name),
"%s/dbbench_sqlite3-%d.db",
tmp_dir.c_str(),
db_num_);
snprintf(file_name, sizeof(file_name), "%s/dbbench_sqlite3-%d.db",
tmp_dir.c_str(), db_num_);
status = sqlite3_open(file_name, &db_);
if (status) {
fprintf(stderr, "open error: %s\n", sqlite3_errmsg(db_));
@ -460,26 +453,26 @@ class Benchmark {
std::string WAL_checkpoint = "PRAGMA wal_autocheckpoint = 4096";
status = sqlite3_exec(db_, WAL_stmt.c_str(), nullptr, nullptr, &err_msg);
ExecErrorCheck(status, err_msg);
status = sqlite3_exec(db_, WAL_checkpoint.c_str(), nullptr, nullptr,
&err_msg);
status =
sqlite3_exec(db_, WAL_checkpoint.c_str(), nullptr, nullptr, &err_msg);
ExecErrorCheck(status, err_msg);
}
// Change locking mode to exclusive and create tables/index for database
std::string locking_stmt = "PRAGMA locking_mode = EXCLUSIVE";
std::string create_stmt =
"CREATE TABLE test (key blob, value blob, PRIMARY KEY(key))";
std::string stmt_array[] = { locking_stmt, create_stmt };
"CREATE TABLE test (key blob, value blob, PRIMARY KEY(key))";
std::string stmt_array[] = {locking_stmt, create_stmt};
int stmt_array_length = sizeof(stmt_array) / sizeof(std::string);
for (int i = 0; i < stmt_array_length; i++) {
status = sqlite3_exec(db_, stmt_array[i].c_str(), nullptr, nullptr,
&err_msg);
status =
sqlite3_exec(db_, stmt_array[i].c_str(), nullptr, nullptr, &err_msg);
ExecErrorCheck(status, err_msg);
}
}
void Write(bool write_sync, Order order, DBState state,
int num_entries, int value_size, int entries_per_batch) {
void Write(bool write_sync, Order order, DBState state, int num_entries,
int value_size, int entries_per_batch) {
// Create new database if state == FRESH
if (state == FRESH) {
if (FLAGS_use_existing_db) {
@ -507,20 +500,20 @@ class Benchmark {
std::string end_trans_str = "END TRANSACTION;";
// Check for synchronous flag in options
std::string sync_stmt = (write_sync) ? "PRAGMA synchronous = FULL" :
"PRAGMA synchronous = OFF";
std::string sync_stmt =
(write_sync) ? "PRAGMA synchronous = FULL" : "PRAGMA synchronous = OFF";
status = sqlite3_exec(db_, sync_stmt.c_str(), nullptr, nullptr, &err_msg);
ExecErrorCheck(status, err_msg);
// Preparing sqlite3 statements
status = sqlite3_prepare_v2(db_, replace_str.c_str(), -1,
&replace_stmt, nullptr);
status = sqlite3_prepare_v2(db_, replace_str.c_str(), -1, &replace_stmt,
nullptr);
ErrorCheck(status);
status = sqlite3_prepare_v2(db_, begin_trans_str.c_str(), -1,
&begin_trans_stmt, nullptr);
ErrorCheck(status);
status = sqlite3_prepare_v2(db_, end_trans_str.c_str(), -1,
&end_trans_stmt, nullptr);
status = sqlite3_prepare_v2(db_, end_trans_str.c_str(), -1, &end_trans_stmt,
nullptr);
ErrorCheck(status);
bool transaction = (entries_per_batch > 1);
@ -538,16 +531,16 @@ class Benchmark {
const char* value = gen_.Generate(value_size).data();
// Create values for key-value pair
const int k = (order == SEQUENTIAL) ? i + j :
(rand_.Next() % num_entries);
const int k =
(order == SEQUENTIAL) ? i + j : (rand_.Next() % num_entries);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
// Bind KV values into replace_stmt
status = sqlite3_bind_blob(replace_stmt, 1, key, 16, SQLITE_STATIC);
ErrorCheck(status);
status = sqlite3_bind_blob(replace_stmt, 2, value,
value_size, SQLITE_STATIC);
status = sqlite3_bind_blob(replace_stmt, 2, value, value_size,
SQLITE_STATIC);
ErrorCheck(status);
// Execute replace_stmt
@ -593,8 +586,8 @@ class Benchmark {
status = sqlite3_prepare_v2(db_, begin_trans_str.c_str(), -1,
&begin_trans_stmt, nullptr);
ErrorCheck(status);
status = sqlite3_prepare_v2(db_, end_trans_str.c_str(), -1,
&end_trans_stmt, nullptr);
status = sqlite3_prepare_v2(db_, end_trans_str.c_str(), -1, &end_trans_stmt,
nullptr);
ErrorCheck(status);
status = sqlite3_prepare_v2(db_, read_str.c_str(), -1, &read_stmt, nullptr);
ErrorCheck(status);
@ -621,7 +614,8 @@ class Benchmark {
ErrorCheck(status);
// Execute read statement
while ((status = sqlite3_step(read_stmt)) == SQLITE_ROW) {}
while ((status = sqlite3_step(read_stmt)) == SQLITE_ROW) {
}
StepErrorCheck(status);
// Reset SQLite statement for another use
@ -651,7 +645,7 @@ class Benchmark {
void ReadSequential() {
int status;
sqlite3_stmt *pStmt;
sqlite3_stmt* pStmt;
std::string read_str = "SELECT * FROM test ORDER BY key";
status = sqlite3_prepare_v2(db_, read_str.c_str(), -1, &pStmt, nullptr);
@ -664,7 +658,6 @@ class Benchmark {
status = sqlite3_finalize(pStmt);
ErrorCheck(status);
}
};
} // namespace leveldb
@ -710,9 +703,9 @@ int main(int argc, char** argv) {
// Choose a location for the test database if none given with --db=<path>
if (FLAGS_db == nullptr) {
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
}
leveldb::Benchmark benchmark;

108
doc/bench/db_bench_tree_db.cc
View File

@ -2,9 +2,10 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#include <kcpolydb.h>
#include <stdio.h>
#include <stdlib.h>
#include <kcpolydb.h>
#include "util/histogram.h"
#include "util/random.h"
#include "util/testutil.h"
@ -34,8 +35,7 @@ static const char* FLAGS_benchmarks =
"fillrand100K,"
"fillseq100K,"
"readseq100K,"
"readrand100K,"
;
"readrand100K,";
// Number of key/values to place in database
static int FLAGS_num = 1000000;
@ -71,9 +71,7 @@ static bool FLAGS_compression = true;
// Use the db with the following name.
static const char* FLAGS_db = nullptr;
inline
static void DBSynchronize(kyotocabinet::TreeDB* db_)
{
inline static void DBSynchronize(kyotocabinet::TreeDB* db_) {
// Synchronize will flush writes to disk
if (!db_->synchronize()) {
fprintf(stderr, "synchronize error: %s\n", db_->error().name());
@ -121,7 +119,7 @@ static Slice TrimSpace(Slice s) {
start++;
}
int limit = s.size();
while (limit > start && isspace(s[limit-1])) {
while (limit > start && isspace(s[limit - 1])) {
limit--;
}
return Slice(s.data() + start, limit - start);
@ -146,7 +144,7 @@ class Benchmark {
// State kept for progress messages
int done_;
int next_report_; // When to report next
int next_report_; // When to report next
void PrintHeader() {
const int kKeySize = 16;
@ -157,20 +155,20 @@ class Benchmark {
static_cast<int>(FLAGS_value_size * FLAGS_compression_ratio + 0.5));
fprintf(stdout, "Entries: %d\n", num_);
fprintf(stdout, "RawSize: %.1f MB (estimated)\n",
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_)
/ 1048576.0));
((static_cast<int64_t>(kKeySize + FLAGS_value_size) * num_) /
1048576.0));
fprintf(stdout, "FileSize: %.1f MB (estimated)\n",
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_)
/ 1048576.0));
(((kKeySize + FLAGS_value_size * FLAGS_compression_ratio) * num_) /
1048576.0));
PrintWarnings();
fprintf(stdout, "------------------------------------------------\n");
}
void PrintWarnings() {
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
fprintf(stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n"
);
fprintf(
stdout,
"WARNING: Optimization is disabled: benchmarks unnecessarily slow\n");
#endif
#ifndef NDEBUG
fprintf(stdout,
@ -237,13 +235,20 @@ class Benchmark {
done_++;
if (done_ >= next_report_) {
if (next_report_ < 1000) next_report_ += 100;
else if (next_report_ < 5000) next_report_ += 500;
else if (next_report_ < 10000) next_report_ += 1000;
else if (next_report_ < 50000) next_report_ += 5000;
else if (next_report_ < 100000) next_report_ += 10000;
else if (next_report_ < 500000) next_report_ += 50000;
else next_report_ += 100000;
if (next_report_ < 1000)
next_report_ += 100;
else if (next_report_ < 5000)
next_report_ += 500;
else if (next_report_ < 10000)
next_report_ += 1000;
else if (next_report_ < 50000)
next_report_ += 5000;
else if (next_report_ < 100000)
next_report_ += 10000;
else if (next_report_ < 500000)
next_report_ += 50000;
else
next_report_ += 100000;
fprintf(stderr, "... finished %d ops%30s\r", done_, "");
fflush(stderr);
}
@ -261,16 +266,14 @@ class Benchmark {
snprintf(rate, sizeof(rate), "%6.1f MB/s",
(bytes_ / 1048576.0) / (finish - start_));
if (!message_.empty()) {
message_ = std::string(rate) + " " + message_;
message_ = std::string(rate) + " " + message_;
} else {
message_ = rate;
}
}
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n",
name.ToString().c_str(),
(finish - start_) * 1e6 / done_,
(message_.empty() ? "" : " "),
fprintf(stdout, "%-12s : %11.3f micros/op;%s%s\n", name.ToString().c_str(),
(finish - start_) * 1e6 / done_, (message_.empty() ? "" : " "),
message_.c_str());
if (FLAGS_histogram) {
fprintf(stdout, "Microseconds per op:\n%s\n", hist_.ToString().c_str());
@ -279,21 +282,15 @@ class Benchmark {
}
public:
enum Order {
SEQUENTIAL,
RANDOM
};
enum DBState {
FRESH,
EXISTING
};
enum Order { SEQUENTIAL, RANDOM };
enum DBState { FRESH, EXISTING };
Benchmark()
: db_(nullptr),
num_(FLAGS_num),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
bytes_(0),
rand_(301) {
: db_(nullptr),
num_(FLAGS_num),
reads_(FLAGS_reads < 0 ? FLAGS_num : FLAGS_reads),
bytes_(0),
rand_(301) {
std::vector<std::string> files;
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
@ -386,7 +383,7 @@ class Benchmark {
}
private:
void Open(bool sync) {
void Open(bool sync) {
assert(db_ == nullptr);
// Initialize db_
@ -395,16 +392,14 @@ class Benchmark {
db_num_++;
std::string test_dir;
Env::Default()->GetTestDirectory(&test_dir);
snprintf(file_name, sizeof(file_name),
"%s/dbbench_polyDB-%d.kct",
test_dir.c_str(),
db_num_);
snprintf(file_name, sizeof(file_name), "%s/dbbench_polyDB-%d.kct",
test_dir.c_str(), db_num_);
// Create tuning options and open the database
int open_options = kyotocabinet::PolyDB::OWRITER |
kyotocabinet::PolyDB::OCREATE;
int tune_options = kyotocabinet::TreeDB::TSMALL |
kyotocabinet::TreeDB::TLINEAR;
int open_options =
kyotocabinet::PolyDB::OWRITER | kyotocabinet::PolyDB::OCREATE;
int tune_options =
kyotocabinet::TreeDB::TSMALL | kyotocabinet::TreeDB::TLINEAR;
if (FLAGS_compression) {
tune_options |= kyotocabinet::TreeDB::TCOMPRESS;
db_->tune_compressor(&comp_);
@ -412,7 +407,7 @@ class Benchmark {
db_->tune_options(tune_options);
db_->tune_page_cache(FLAGS_cache_size);
db_->tune_page(FLAGS_page_size);
db_->tune_map(256LL<<20);
db_->tune_map(256LL << 20);
if (sync) {
open_options |= kyotocabinet::PolyDB::OAUTOSYNC;
}
@ -421,8 +416,8 @@ class Benchmark {
}
}
void Write(bool sync, Order order, DBState state,
int num_entries, int value_size, int entries_per_batch) {
void Write(bool sync, Order order, DBState state, int num_entries,
int value_size, int entries_per_batch) {
// Create new database if state == FRESH
if (state == FRESH) {
if (FLAGS_use_existing_db) {
@ -442,8 +437,7 @@ class Benchmark {
}
// Write to database
for (int i = 0; i < num_entries; i++)
{
for (int i = 0; i < num_entries; i++) {
const int k = (order == SEQUENTIAL) ? i : (rand_.Next() % num_entries);
char key[100];
snprintf(key, sizeof(key), "%016d", k);
@ -517,9 +511,9 @@ int main(int argc, char** argv) {
// Choose a location for the test database if none given with --db=<path>
if (FLAGS_db == nullptr) {
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
leveldb::Env::Default()->GetTestDirectory(&default_db_path);
default_db_path += "/dbbench";
FLAGS_db = default_db_path.c_str();
}
leveldb::Benchmark benchmark;

53
helpers/memenv/memenv.cc
View File

@ -134,9 +134,7 @@ class FileState {
private:
// Private since only Unref() should be used to delete it.
~FileState() {
Truncate();
}
~FileState() { Truncate(); }
// No copying allowed.
FileState(const FileState&);
@ -158,9 +156,7 @@ class SequentialFileImpl : public SequentialFile {
file_->Ref();
}
~SequentialFileImpl() {
file_->Unref();
}
~SequentialFileImpl() { file_->Unref(); }
virtual Status Read(size_t n, Slice* result, char* scratch) {
Status s = file_->Read(pos_, n, result, scratch);
@ -189,13 +185,9 @@ class SequentialFileImpl : public SequentialFile {
class RandomAccessFileImpl : public RandomAccessFile {
public:
explicit RandomAccessFileImpl(FileState* file) : file_(file) {
file_->Ref();
}
explicit RandomAccessFileImpl(FileState* file) : file_(file) { file_->Ref(); }
~RandomAccessFileImpl() {
file_->Unref();
}
~RandomAccessFileImpl() { file_->Unref(); }
virtual Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const {
@ -208,17 +200,11 @@ class RandomAccessFileImpl : public RandomAccessFile {
class WritableFileImpl : public WritableFile {
public:
WritableFileImpl(FileState* file) : file_(file) {
file_->Ref();
}
WritableFileImpl(FileState* file) : file_(file) { file_->Ref(); }
~WritableFileImpl() {
file_->Unref();
}
~WritableFileImpl() { file_->Unref(); }
virtual Status Append(const Slice& data) {
return file_->Append(data);
}
virtual Status Append(const Slice& data) { return file_->Append(data); }
virtual Status Close() { return Status::OK(); }
virtual Status Flush() { return Status::OK(); }
@ -230,15 +216,16 @@ class WritableFileImpl : public WritableFile {
class NoOpLogger : public Logger {
public:
virtual void Logv(const char* format, va_list ap) { }
virtual void Logv(const char* format, va_list ap) {}
};
class InMemoryEnv : public EnvWrapper {
public:
explicit InMemoryEnv(Env* base_env) : EnvWrapper(base_env) { }
explicit InMemoryEnv(Env* base_env) : EnvWrapper(base_env) {}
virtual ~InMemoryEnv() {
for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end(); ++i){
for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end();
++i) {
i->second->Unref();
}
}
@ -311,7 +298,8 @@ class InMemoryEnv : public EnvWrapper {
MutexLock lock(&mutex_);
result->clear();
for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end(); ++i){
for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end();
++i) {
const std::string& filename = i->first;
if (filename.size() >= dir.size() + 1 && filename[dir.size()] == '/' &&
@ -343,13 +331,9 @@ class InMemoryEnv : public EnvWrapper {
return Status::OK();
}
virtual Status CreateDir(const std::string& dirname) {
return Status::OK();
}
virtual Status CreateDir(const std::string& dirname) { return Status::OK(); }
virtual Status DeleteDir(const std::string& dirname) {
return Status::OK();
}
virtual Status DeleteDir(const std::string& dirname) { return Status::OK(); }
virtual Status GetFileSize(const std::string& fname, uint64_t* file_size) {
MutexLock lock(&mutex_);
@ -361,8 +345,7 @@ class InMemoryEnv : public EnvWrapper {
return Status::OK();
}
virtual Status RenameFile(const std::string& src,
const std::string& target) {
virtual Status RenameFile(const std::string& src, const std::string& target) {
MutexLock lock(&mutex_);
if (file_map_.find(src) == file_map_.end()) {
return Status::IOError(src, "File not found");
@ -403,8 +386,6 @@ class InMemoryEnv : public EnvWrapper {
} // namespace
Env* NewMemEnv(Env* base_env) {
return new InMemoryEnv(base_env);
}
Env* NewMemEnv(Env* base_env) { return new InMemoryEnv(base_env); }
} // namespace leveldb

35
helpers/memenv/memenv_test.cc
View File

@ -4,12 +4,13 @@
#include "helpers/memenv/memenv.h"
#include <string>
#include <vector>
#include "db/db_impl.h"
#include "leveldb/db.h"
#include "leveldb/env.h"
#include "util/testharness.h"
#include <string>
#include <vector>
namespace leveldb {
@ -17,12 +18,8 @@ class MemEnvTest {
public:
Env* env_;
MemEnvTest()
: env_(NewMemEnv(Env::Default())) {
}
~MemEnvTest() {
delete env_;
}
MemEnvTest() : env_(NewMemEnv(Env::Default())) {}
~MemEnvTest() { delete env_; }
};
TEST(MemEnvTest, Basics) {
@ -109,25 +106,25 @@ TEST(MemEnvTest, ReadWrite) {
// Read sequentially.
ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
ASSERT_EQ(0, result.compare("hello"));
ASSERT_OK(seq_file->Skip(1));
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
ASSERT_EQ(0, result.compare("world"));
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
ASSERT_EQ(0, result.size());
ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
ASSERT_OK(seq_file->Read(1000, &result, scratch));
ASSERT_EQ(0, result.size());
delete seq_file;
// Random reads.
ASSERT_OK(env_->NewRandomAccessFile("/dir/f", &rand_file));
ASSERT_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
ASSERT_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
ASSERT_EQ(0, result.compare("world"));
ASSERT_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
ASSERT_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
ASSERT_EQ(0, result.compare("hello"));
ASSERT_OK(rand_file->Read(10, 100, &result, scratch)); // Read "d".
ASSERT_OK(rand_file->Read(10, 100, &result, scratch)); // Read "d".
ASSERT_EQ(0, result.compare("d"));
// Too high offset.
@ -176,7 +173,7 @@ TEST(MemEnvTest, LargeWrite) {
SequentialFile* seq_file;
Slice result;
ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file));
ASSERT_OK(seq_file->Read(3, &result, scratch)); // Read "foo".
ASSERT_OK(seq_file->Read(3, &result, scratch)); // Read "foo".
ASSERT_EQ(0, result.compare("foo"));
size_t read = 0;
@ -188,7 +185,7 @@ TEST(MemEnvTest, LargeWrite) {
}
ASSERT_TRUE(write_data == read_data);
delete seq_file;
delete [] scratch;
delete[] scratch;
}
TEST(MemEnvTest, OverwriteOpenFile) {
@ -259,6 +256,4 @@ TEST(MemEnvTest, DBTest) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

42
include/leveldb/c.h
View File

@ -47,26 +47,27 @@ extern "C" {
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include "leveldb/export.h"
/* Exported types */
typedef struct leveldb_t leveldb_t;
typedef struct leveldb_cache_t leveldb_cache_t;
typedef struct leveldb_comparator_t leveldb_comparator_t;
typedef struct leveldb_env_t leveldb_env_t;
typedef struct leveldb_filelock_t leveldb_filelock_t;
typedef struct leveldb_filterpolicy_t leveldb_filterpolicy_t;
typedef struct leveldb_iterator_t leveldb_iterator_t;
typedef struct leveldb_logger_t leveldb_logger_t;
typedef struct leveldb_options_t leveldb_options_t;
typedef struct leveldb_randomfile_t leveldb_randomfile_t;
typedef struct leveldb_readoptions_t leveldb_readoptions_t;
typedef struct leveldb_seqfile_t leveldb_seqfile_t;
typedef struct leveldb_snapshot_t leveldb_snapshot_t;
typedef struct leveldb_writablefile_t leveldb_writablefile_t;
typedef struct leveldb_writebatch_t leveldb_writebatch_t;
typedef struct leveldb_writeoptions_t leveldb_writeoptions_t;
typedef struct leveldb_t leveldb_t;
typedef struct leveldb_cache_t leveldb_cache_t;
typedef struct leveldb_comparator_t leveldb_comparator_t;
typedef struct leveldb_env_t leveldb_env_t;
typedef struct leveldb_filelock_t leveldb_filelock_t;
typedef struct leveldb_filterpolicy_t leveldb_filterpolicy_t;
typedef struct leveldb_iterator_t leveldb_iterator_t;
typedef struct leveldb_logger_t leveldb_logger_t;
typedef struct leveldb_options_t leveldb_options_t;
typedef struct leveldb_randomfile_t leveldb_randomfile_t;
typedef struct leveldb_readoptions_t leveldb_readoptions_t;
typedef struct leveldb_seqfile_t leveldb_seqfile_t;
typedef struct leveldb_snapshot_t leveldb_snapshot_t;
typedef struct leveldb_writablefile_t leveldb_writablefile_t;
typedef struct leveldb_writebatch_t leveldb_writebatch_t;
typedef struct leveldb_writeoptions_t leveldb_writeoptions_t;
/* DB operations */
@ -189,10 +190,7 @@ LEVELDB_EXPORT void leveldb_options_set_block_restart_interval(
LEVELDB_EXPORT void leveldb_options_set_max_file_size(leveldb_options_t*,
size_t);
enum {
leveldb_no_compression = 0,
leveldb_snappy_compression = 1
};
enum { leveldb_no_compression = 0, leveldb_snappy_compression = 1 };
LEVELDB_EXPORT void leveldb_options_set_compression(leveldb_options_t*, int);
/* Comparator */
@ -266,7 +264,7 @@ LEVELDB_EXPORT int leveldb_major_version();
LEVELDB_EXPORT int leveldb_minor_version();
#ifdef __cplusplus
} /* end extern "C" */
} /* end extern "C" */
#endif
#endif /* STORAGE_LEVELDB_INCLUDE_C_H_ */
#endif /* STORAGE_LEVELDB_INCLUDE_C_H_ */

3
include/leveldb/cache.h
View File

@ -19,6 +19,7 @@
#define STORAGE_LEVELDB_INCLUDE_CACHE_H_
#include <stdint.h>
#include "leveldb/export.h"
#include "leveldb/slice.h"
@ -42,7 +43,7 @@ class LEVELDB_EXPORT Cache {
virtual ~Cache();
// Opaque handle to an entry stored in the cache.
struct Handle { };
struct Handle {};
// Insert a mapping from key->value into the cache and assign it
// the specified charge against the total cache capacity.

6
include/leveldb/comparator.h
View File

@ -6,6 +6,7 @@
#define STORAGE_LEVELDB_INCLUDE_COMPARATOR_H_
#include <string>
#include "leveldb/export.h"
namespace leveldb {
@ -44,9 +45,8 @@ class LEVELDB_EXPORT Comparator {
// If *start < limit, changes *start to a short string in [start,limit).
// Simple comparator implementations may return with *start unchanged,
// i.e., an implementation of this method that does nothing is correct.
virtual void FindShortestSeparator(
std::string* start,
const Slice& limit) const = 0;
virtual void FindShortestSeparator(std::string* start,
const Slice& limit) const = 0;
// Changes *key to a short string >= *key.
// Simple comparator implementations may return with *key unchanged,

19
include/leveldb/db.h
View File

@ -7,6 +7,7 @@
#include <stdint.h>
#include <stdio.h>
#include "leveldb/export.h"
#include "leveldb/iterator.h"
#include "leveldb/options.h"
@ -32,11 +33,11 @@ class LEVELDB_EXPORT Snapshot {
// A range of keys
struct LEVELDB_EXPORT Range {
Slice start; // Included in the range
Slice limit; // Not included in the range
Slice start; // Included in the range
Slice limit; // Not included in the range
Range() { }
Range(const Slice& s, const Slice& l) : start(s), limit(l) { }
Range() {}
Range(const Slice& s, const Slice& l) : start(s), limit(l) {}
};
// A DB is a persistent ordered map from keys to values.
@ -49,8 +50,7 @@ class LEVELDB_EXPORT DB {
// OK on success.
// Stores nullptr in *dbptr and returns a non-OK status on error.
// Caller should delete *dbptr when it is no longer needed.
static Status Open(const Options& options,
const std::string& name,
static Status Open(const Options& options, const std::string& name,
DB** dbptr);
DB() = default;
@ -63,8 +63,7 @@ class LEVELDB_EXPORT DB {
// Set the database entry for "key" to "value". Returns OK on success,
// and a non-OK status on error.
// Note: consider setting options.sync = true.
virtual Status Put(const WriteOptions& options,
const Slice& key,
virtual Status Put(const WriteOptions& options, const Slice& key,
const Slice& value) = 0;
// Remove the database entry (if any) for "key". Returns OK on
@ -85,8 +84,8 @@ class LEVELDB_EXPORT DB {
// a status for which Status::IsNotFound() returns true.
//
// May return some other Status on an error.
virtual Status Get(const ReadOptions& options,
const Slice& key, std::string* value) = 0;
virtual Status Get(const ReadOptions& options, const Slice& key,
std::string* value) = 0;
// Return a heap-allocated iterator over the contents of the database.
// The result of NewIterator() is initially invalid (caller must

1
include/leveldb/dumpfile.h
View File

@ -6,6 +6,7 @@
#define STORAGE_LEVELDB_INCLUDE_DUMPFILE_H_
#include <string>
#include "leveldb/env.h"
#include "leveldb/export.h"
#include "leveldb/status.h"

18
include/leveldb/env.h
View File

@ -15,8 +15,10 @@
#include <stdarg.h>
#include <stdint.h>
#include <string>
#include <vector>
#include "leveldb/export.h"
#include "leveldb/status.h"
@ -164,9 +166,7 @@ class LEVELDB_EXPORT Env {
// added to the same Env may run concurrently in different threads.
// I.e., the caller may not assume that background work items are
// serialized.
virtual void Schedule(
void (*function)(void* arg),
void* arg) = 0;
virtual void Schedule(void (*function)(void* arg), void* arg) = 0;
// Start a new thread, invoking "function(arg)" within the new thread.
// When "function(arg)" returns, the thread will be destroyed.
@ -287,9 +287,9 @@ class LEVELDB_EXPORT FileLock {
// Log the specified data to *info_log if info_log is non-null.
void Log(Logger* info_log, const char* format, ...)
# if defined(__GNUC__) || defined(__clang__)
__attribute__((__format__ (__printf__, 2, 3)))
# endif
#if defined(__GNUC__) || defined(__clang__)
__attribute__((__format__(__printf__, 2, 3)))
#endif
;
// A utility routine: write "data" to the named file.
@ -306,7 +306,7 @@ LEVELDB_EXPORT Status ReadFileToString(Env* env, const std::string& fname,
class LEVELDB_EXPORT EnvWrapper : public Env {
public:
// Initialize an EnvWrapper that delegates all calls to *t.
explicit EnvWrapper(Env* t) : target_(t) { }
explicit EnvWrapper(Env* t) : target_(t) {}
virtual ~EnvWrapper();
// Return the target to which this Env forwards all calls.
@ -364,9 +364,7 @@ class LEVELDB_EXPORT EnvWrapper : public Env {
Status NewLogger(const std::string& fname, Logger** result) override {
return target_->NewLogger(fname, result);
}
uint64_t NowMicros() override {
return target_->NowMicros();
}
uint64_t NowMicros() override { return target_->NowMicros(); }
void SleepForMicroseconds(int micros) override {
target_->SleepForMicroseconds(micros);
}

5
include/leveldb/filter_policy.h
View File

@ -17,6 +17,7 @@
#define STORAGE_LEVELDB_INCLUDE_FILTER_POLICY_H_
#include <string>
#include "leveldb/export.h"
namespace leveldb {
@ -39,8 +40,8 @@ class LEVELDB_EXPORT FilterPolicy {
//
// Warning: do not change the initial contents of *dst. Instead,
// append the newly constructed filter to *dst.
virtual void CreateFilter(const Slice* keys, int n, std::string* dst)
const = 0;
virtual void CreateFilter(const Slice* keys, int n,
std::string* dst) const = 0;
// "filter" contains the data appended by a preceding call to
// CreateFilter() on this class. This method must return true if

5
include/leveldb/iterator.h
View File

@ -93,7 +93,10 @@ class LEVELDB_EXPORT Iterator {
// True if the node is not used. Only head nodes might be unused.
bool IsEmpty() const { return function == nullptr; }
// Invokes the cleanup function.
void Run() { assert(function != nullptr); (*function)(arg1, arg2); }
void Run() {
assert(function != nullptr);
(*function)(arg1, arg2);
}
};
CleanupNode cleanup_head_;
};

3
include/leveldb/options.h
View File

@ -6,6 +6,7 @@
#define STORAGE_LEVELDB_INCLUDE_OPTIONS_H_
#include <stddef.h>
#include "leveldb/export.h"
namespace leveldb {
@ -24,7 +25,7 @@ class Snapshot;
enum CompressionType {
// NOTE: do not change the values of existing entries, as these are
// part of the persistent format on disk.
kNoCompression = 0x0,
kNoCompression = 0x0,
kSnappyCompression = 0x1
};

29
include/leveldb/slice.h
View File

@ -18,7 +18,9 @@
#include <assert.h>
#include <stddef.h>
#include <string.h>
#include <string>
#include "leveldb/export.h"
namespace leveldb {
@ -26,16 +28,16 @@ namespace leveldb {
class LEVELDB_EXPORT Slice {
public:
// Create an empty slice.
Slice() : data_(""), size_(0) { }
Slice() : data_(""), size_(0) {}
// Create a slice that refers to d[0,n-1].
Slice(const char* d, size_t n) : data_(d), size_(n) { }
Slice(const char* d, size_t n) : data_(d), size_(n) {}
// Create a slice that refers to the contents of "s"
Slice(const std::string& s) : data_(s.data()), size_(s.size()) { }
Slice(const std::string& s) : data_(s.data()), size_(s.size()) {}
// Create a slice that refers to s[0,strlen(s)-1]
Slice(const char* s) : data_(s), size_(strlen(s)) { }
Slice(const char* s) : data_(s), size_(strlen(s)) {}
// Intentionally copyable.
Slice(const Slice&) = default;
@ -58,7 +60,10 @@ class LEVELDB_EXPORT Slice {
}
// Change this slice to refer to an empty array
void clear() { data_ = ""; size_ = 0; }
void clear() {
data_ = "";
size_ = 0;
}
// Drop the first "n" bytes from this slice.
void remove_prefix(size_t n) {
@ -78,8 +83,7 @@ class LEVELDB_EXPORT Slice {
// Return true iff "x" is a prefix of "*this"
bool starts_with(const Slice& x) const {
return ((size_ >= x.size_) &&
(memcmp(data_, x.data_, x.size_) == 0));
return ((size_ >= x.size_) && (memcmp(data_, x.data_, x.size_) == 0));
}
private:
@ -92,21 +96,20 @@ inline bool operator==(const Slice& x, const Slice& y) {
(memcmp(x.data(), y.data(), x.size()) == 0));
}
inline bool operator!=(const Slice& x, const Slice& y) {
return !(x == y);
}
inline bool operator!=(const Slice& x, const Slice& y) { return !(x == y); }
inline int Slice::compare(const Slice& b) const {
const size_t min_len = (size_ < b.size_) ? size_ : b.size_;
int r = memcmp(data_, b.data_, min_len);
if (r == 0) {
if (size_ < b.size_) r = -1;
else if (size_ > b.size_) r = +1;
if (size_ < b.size_)
r = -1;
else if (size_ > b.size_)
r = +1;
}
return r;
}
} // namespace leveldb
#endif // STORAGE_LEVELDB_INCLUDE_SLICE_H_

3
include/leveldb/status.h
View File

@ -15,6 +15,7 @@
#include <algorithm>
#include <string>
#include "leveldb/export.h"
#include "leveldb/slice.h"
@ -23,7 +24,7 @@ namespace leveldb {
class LEVELDB_EXPORT Status {
public:
// Create a success status.
Status() noexcept : state_(nullptr) { }
Status() noexcept : state_(nullptr) {}
~Status() { delete[] state_; }
Status(const Status& rhs);

15
include/leveldb/table.h
View File

@ -6,6 +6,7 @@
#define STORAGE_LEVELDB_INCLUDE_TABLE_H_
#include <stdint.h>
#include "leveldb/export.h"
#include "leveldb/iterator.h"
@ -36,10 +37,8 @@ class LEVELDB_EXPORT Table {
// for the duration of the returned table's lifetime.
//
// *file must remain live while this Table is in use.
static Status Open(const Options& options,
RandomAccessFile* file,
uint64_t file_size,
Table** table);
static Status Open(const Options& options, RandomAccessFile* file,
uint64_t file_size, Table** table);
Table(const Table&) = delete;
void operator=(const Table&) = delete;
@ -70,11 +69,9 @@ class LEVELDB_EXPORT Table {
// to Seek(key). May not make such a call if filter policy says
// that key is not present.
friend class TableCache;
Status InternalGet(
const ReadOptions&, const Slice& key,
void* arg,
void (*handle_result)(void* arg, const Slice& k, const Slice& v));
Status InternalGet(const ReadOptions&, const Slice& key, void* arg,
void (*handle_result)(void* arg, const Slice& k,
const Slice& v));
void ReadMeta(const Footer& footer);
void ReadFilter(const Slice& filter_handle_value);

1
include/leveldb/table_builder.h
View File

@ -14,6 +14,7 @@
#define STORAGE_LEVELDB_INCLUDE_TABLE_BUILDER_H_
#include <stdint.h>
#include "leveldb/export.h"
#include "leveldb/options.h"
#include "leveldb/status.h"

3
include/leveldb/write_batch.h
View File

@ -22,6 +22,7 @@
#define STORAGE_LEVELDB_INCLUDE_WRITE_BATCH_H_
#include <string>
#include "leveldb/export.h"
#include "leveldb/status.h"
@ -35,7 +36,7 @@ class LEVELDB_EXPORT WriteBatch {
// Intentionally copyable.
WriteBatch(const WriteBatch&) = default;
WriteBatch& operator =(const WriteBatch&) = default;
WriteBatch& operator=(const WriteBatch&) = default;
~WriteBatch();

12
issues/issue178_test.cc
View File

@ -3,9 +3,9 @@
// found in the LICENSE file. See the AUTHORS file for names of contributors.
// Test for issue 178: a manual compaction causes deleted data to reappear.
#include <cstdlib>
#include <iostream>
#include <sstream>
#include <cstdlib>
#include "leveldb/db.h"
#include "leveldb/write_batch.h"
@ -21,11 +21,9 @@ std::string Key1(int i) {
return buf;
}
std::string Key2(int i) {
return Key1(i) + "_xxx";
}
std::string Key2(int i) { return Key1(i) + "_xxx"; }
class Issue178 { };
class Issue178 {};
TEST(Issue178, Test) {
// Get rid of any state from an old run.
@ -87,6 +85,4 @@ TEST(Issue178, Test) {
} // anonymous namespace
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

10
issues/issue200_test.cc
View File

@ -11,14 +11,14 @@
namespace leveldb {
class Issue200 { };
class Issue200 {};
TEST(Issue200, Test) {
// Get rid of any state from an old run.
std::string dbpath = test::TmpDir() + "/leveldb_issue200_test";
DestroyDB(dbpath, Options());
DB *db;
DB* db;
Options options;
options.create_if_missing = true;
ASSERT_OK(DB::Open(options, dbpath, &db));
@ -31,7 +31,7 @@ TEST(Issue200, Test) {
ASSERT_OK(db->Put(write_options, "5", "f"));
ReadOptions read_options;
Iterator *iter = db->NewIterator(read_options);
Iterator* iter = db->NewIterator(read_options);
// Add an element that should not be reflected in the iterator.
ASSERT_OK(db->Put(write_options, "25", "cd"));
@ -54,6 +54,4 @@ TEST(Issue200, Test) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

4
port/port.h
View File

@ -11,9 +11,9 @@
// porting to a new platform, see "port_example.h" for documentation
// of what the new port_<platform>.h file must provide.
#if defined(LEVELDB_PLATFORM_POSIX) || defined(LEVELDB_PLATFORM_WINDOWS)
# include "port/port_stdcxx.h"
#include "port/port_stdcxx.h"
#elif defined(LEVELDB_PLATFORM_CHROMIUM)
# include "port/port_chromium.h"
#include "port/port_chromium.h"
#endif
#endif // STORAGE_LEVELDB_PORT_PORT_H_

26
port/port_stdcxx.h
View File

@ -30,10 +30,10 @@
#endif // HAVE_SNAPPY
#include <cassert>
#include <condition_variable> // NOLINT
#include <cstddef>
#include <cstdint>
#include <condition_variable> // NOLINT
#include <mutex> // NOLINT
#include <mutex> // NOLINT
#include <string>
#include "port/thread_annotations.h"
@ -56,7 +56,7 @@ class LOCKABLE Mutex {
void Lock() EXCLUSIVE_LOCK_FUNCTION() { mu_.lock(); }
void Unlock() UNLOCK_FUNCTION() { mu_.unlock(); }
void AssertHeld() ASSERT_EXCLUSIVE_LOCK() { }
void AssertHeld() ASSERT_EXCLUSIVE_LOCK() {}
private:
friend class CondVar;
@ -79,6 +79,7 @@ class CondVar {
}
void Signal() { cv_.notify_one(); }
void SignalAll() { cv_.notify_all(); }
private:
std::condition_variable cv_;
Mutex* const mu_;
@ -94,7 +95,9 @@ inline bool Snappy_Compress(const char* input, size_t length,
return true;
#else
// Silence compiler warnings about unused arguments.
(void)input; (void)length; (void)output;
(void)input;
(void)length;
(void)output;
#endif // HAVE_SNAPPY
return false;
@ -106,7 +109,9 @@ inline bool Snappy_GetUncompressedLength(const char* input, size_t length,
return snappy::GetUncompressedLength(input, length, result);
#else
// Silence compiler warnings about unused arguments.
(void)input; (void)length; (void)result;
(void)input;
(void)length;
(void)result;
return false;
#endif // HAVE_SNAPPY
}
@ -116,14 +121,17 @@ inline bool Snappy_Uncompress(const char* input, size_t length, char* output) {
return snappy::RawUncompress(input, length, output);
#else
// Silence compiler warnings about unused arguments.
(void)input; (void)length; (void)output;
(void)input;
(void)length;
(void)output;
return false;
#endif // HAVE_SNAPPY
}
inline bool GetHeapProfile(void (*func)(void*, const char*, int), void* arg) {
// Silence compiler warnings about unused arguments.
(void)func; (void)arg;
(void)func;
(void)arg;
return false;
}
@ -132,7 +140,9 @@ inline uint32_t AcceleratedCRC32C(uint32_t crc, const char* buf, size_t size) {
return ::crc32c::Extend(crc, reinterpret_cast<const uint8_t*>(buf), size);
#else
// Silence compiler warnings about unused arguments.
(void)crc; (void)buf; (void)size;
(void)crc;
(void)buf;
(void)size;
return 0;
#endif // HAVE_CRC32C
}

13
port/thread_annotations.h
View File

@ -13,9 +13,9 @@
#if defined(__clang__)
#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
#else
#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op
#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op
#endif
#endif // !defined(THREAD_ANNOTATION_ATTRIBUTE__)
@ -54,18 +54,15 @@
#endif
#ifndef LOCK_RETURNED
#define LOCK_RETURNED(x) \
THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
#define LOCK_RETURNED(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
#endif
#ifndef LOCKABLE
#define LOCKABLE \
THREAD_ANNOTATION_ATTRIBUTE__(lockable)
#define LOCKABLE THREAD_ANNOTATION_ATTRIBUTE__(lockable)
#endif
#ifndef SCOPED_LOCKABLE
#define SCOPED_LOCKABLE \
THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
#define SCOPED_LOCKABLE THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
#endif
#ifndef EXCLUSIVE_LOCK_FUNCTION

28
table/block.cc
View File

@ -6,8 +6,9 @@
#include "table/block.h"
#include <vector>
#include <algorithm>
#include <vector>
#include "leveldb/comparator.h"
#include "table/format.h"
#include "util/coding.h"
@ -27,7 +28,7 @@ Block::Block(const BlockContents& contents)
if (size_ < sizeof(uint32_t)) {
size_ = 0; // Error marker
} else {
size_t max_restarts_allowed = (size_-sizeof(uint32_t)) / sizeof(uint32_t);
size_t max_restarts_allowed = (size_ - sizeof(uint32_t)) / sizeof(uint32_t);
if (NumRestarts() > max_restarts_allowed) {
// The size is too small for NumRestarts()
size_ = 0;
@ -51,8 +52,7 @@ Block::~Block() {
// If any errors are detected, returns nullptr. Otherwise, returns a
// pointer to the key delta (just past the three decoded values).
static inline const char* DecodeEntry(const char* p, const char* limit,
uint32_t* shared,
uint32_t* non_shared,
uint32_t* shared, uint32_t* non_shared,
uint32_t* value_length) {
if (limit - p < 3) return nullptr;
*shared = reinterpret_cast<const unsigned char*>(p)[0];
@ -76,9 +76,9 @@ static inline const char* DecodeEntry(const char* p, const char* limit,
class Block::Iter : public Iterator {
private:
const Comparator* const comparator_;
const char* const data_; // underlying block contents
uint32_t const restarts_; // Offset of restart array (list of fixed32)
uint32_t const num_restarts_; // Number of uint32_t entries in restart array
const char* const data_; // underlying block contents
uint32_t const restarts_; // Offset of restart array (list of fixed32)
uint32_t const num_restarts_; // Number of uint32_t entries in restart array
// current_ is offset in data_ of current entry. >= restarts_ if !Valid
uint32_t current_;
@ -112,9 +112,7 @@ class Block::Iter : public Iterator {
}
public:
Iter(const Comparator* comparator,
const char* data,
uint32_t restarts,
Iter(const Comparator* comparator, const char* data, uint32_t restarts,
uint32_t num_restarts)
: comparator_(comparator),
data_(data),
@ -171,9 +169,9 @@ class Block::Iter : public Iterator {
uint32_t mid = (left + right + 1) / 2;
uint32_t region_offset = GetRestartPoint(mid);
uint32_t shared, non_shared, value_length;
const char* key_ptr = DecodeEntry(data_ + region_offset,
data_ + restarts_,
&shared, &non_shared, &value_length);
const char* key_ptr =
DecodeEntry(data_ + region_offset, data_ + restarts_, &shared,
&non_shared, &value_length);
if (key_ptr == nullptr || (shared != 0)) {
CorruptionError();
return;
@ -253,7 +251,7 @@ class Block::Iter : public Iterator {
}
};
Iterator* Block::NewIterator(const Comparator* cmp) {
Iterator* Block::NewIterator(const Comparator* comparator) {
if (size_ < sizeof(uint32_t)) {
return NewErrorIterator(Status::Corruption("bad block contents"));
}
@ -261,7 +259,7 @@ Iterator* Block::NewIterator(const Comparator* cmp) {
if (num_restarts == 0) {
return NewEmptyIterator();
} else {
return new Iter(cmp, data_, restart_offset_, num_restarts);
return new Iter(comparator, data_, restart_offset_, num_restarts);
}
}

5
table/block.h
View File

@ -7,6 +7,7 @@
#include <stddef.h>
#include <stdint.h>
#include "leveldb/iterator.h"
namespace leveldb {
@ -29,8 +30,8 @@ class Block {
const char* data_;
size_t size_;
uint32_t restart_offset_; // Offset in data_ of restart array
bool owned_; // Block owns data_[]
uint32_t restart_offset_; // Offset in data_ of restart array
bool owned_; // Block owns data_[]
// No copying allowed
Block(const Block&);

21
table/block_builder.cc
View File

@ -28,8 +28,10 @@
#include "table/block_builder.h"
#include <algorithm>
#include <assert.h>
#include <algorithm>
#include "leveldb/comparator.h"
#include "leveldb/table_builder.h"
#include "util/coding.h"
@ -37,27 +39,24 @@
namespace leveldb {
BlockBuilder::BlockBuilder(const Options* options)
: options_(options),
restarts_(),
counter_(0),
finished_(false) {
: options_(options), restarts_(), counter_(0), finished_(false) {
assert(options->block_restart_interval >= 1);
restarts_.push_back(0); // First restart point is at offset 0
restarts_.push_back(0); // First restart point is at offset 0
}
void BlockBuilder::Reset() {
buffer_.clear();
restarts_.clear();
restarts_.push_back(0); // First restart point is at offset 0
restarts_.push_back(0); // First restart point is at offset 0
counter_ = 0;
finished_ = false;
last_key_.clear();
}
size_t BlockBuilder::CurrentSizeEstimate() const {
return (buffer_.size() + // Raw data buffer
restarts_.size() * sizeof(uint32_t) + // Restart array
sizeof(uint32_t)); // Restart array length
return (buffer_.size() + // Raw data buffer
restarts_.size() * sizeof(uint32_t) + // Restart array
sizeof(uint32_t)); // Restart array length
}
Slice BlockBuilder::Finish() {
@ -74,7 +73,7 @@ void BlockBuilder::Add(const Slice& key, const Slice& value) {
Slice last_key_piece(last_key_);
assert(!finished_);
assert(counter_ <= options_->block_restart_interval);
assert(buffer_.empty() // No values yet?
assert(buffer_.empty() // No values yet?
|| options_->comparator->Compare(key, last_key_piece) > 0);
size_t shared = 0;
if (counter_ < options_->block_restart_interval) {

19
table/block_builder.h
View File

@ -5,9 +5,10 @@
#ifndef STORAGE_LEVELDB_TABLE_BLOCK_BUILDER_H_
#define STORAGE_LEVELDB_TABLE_BLOCK_BUILDER_H_
#include <stdint.h>
#include <vector>
#include <stdint.h>
#include "leveldb/slice.h"
namespace leveldb {
@ -35,17 +36,15 @@ class BlockBuilder {
size_t CurrentSizeEstimate() const;
// Return true iff no entries have been added since the last Reset()
bool empty() const {
return buffer_.empty();
}
bool empty() const { return buffer_.empty(); }
private:
const Options* options_;
std::string buffer_; // Destination buffer
std::vector<uint32_t> restarts_; // Restart points
int counter_; // Number of entries emitted since restart
bool finished_; // Has Finish() been called?
std::string last_key_;
const Options* options_;
std::string buffer_; // Destination buffer
std::vector<uint32_t> restarts_; // Restart points
int counter_; // Number of entries emitted since restart
bool finished_; // Has Finish() been called?
std::string last_key_;
// No copying allowed
BlockBuilder(const BlockBuilder&);

19
table/filter_block.cc
View File

@ -16,8 +16,7 @@ static const size_t kFilterBaseLg = 11;
static const size_t kFilterBase = 1 << kFilterBaseLg;
FilterBlockBuilder::FilterBlockBuilder(const FilterPolicy* policy)
: policy_(policy) {
}
: policy_(policy) {}
void FilterBlockBuilder::StartBlock(uint64_t block_offset) {
uint64_t filter_index = (block_offset / kFilterBase);
@ -62,7 +61,7 @@ void FilterBlockBuilder::GenerateFilter() {
tmp_keys_.resize(num_keys);
for (size_t i = 0; i < num_keys; i++) {
const char* base = keys_.data() + start_[i];
size_t length = start_[i+1] - start_[i];
size_t length = start_[i + 1] - start_[i];
tmp_keys_[i] = Slice(base, length);
}
@ -77,14 +76,10 @@ void FilterBlockBuilder::GenerateFilter() {
FilterBlockReader::FilterBlockReader(const FilterPolicy* policy,
const Slice& contents)
: policy_(policy),
data_(nullptr),
offset_(nullptr),
num_(0),
base_lg_(0) {
: policy_(policy), data_(nullptr), offset_(nullptr), num_(0), base_lg_(0) {
size_t n = contents.size();
if (n < 5) return; // 1 byte for base_lg_ and 4 for start of offset array
base_lg_ = contents[n-1];
base_lg_ = contents[n - 1];
uint32_t last_word = DecodeFixed32(contents.data() + n - 5);
if (last_word > n - 5) return;
data_ = contents.data();
@ -95,8 +90,8 @@ FilterBlockReader::FilterBlockReader(const FilterPolicy* policy,
bool FilterBlockReader::KeyMayMatch(uint64_t block_offset, const Slice& key) {
uint64_t index = block_offset >> base_lg_;
if (index < num_) {
uint32_t start = DecodeFixed32(offset_ + index*4);
uint32_t limit = DecodeFixed32(offset_ + index*4 + 4);
uint32_t start = DecodeFixed32(offset_ + index * 4);
uint32_t limit = DecodeFixed32(offset_ + index * 4 + 4);
if (start <= limit && limit <= static_cast<size_t>(offset_ - data_)) {
Slice filter = Slice(data_ + start, limit - start);
return policy_->KeyMayMatch(key, filter);
@ -108,4 +103,4 @@ bool FilterBlockReader::KeyMayMatch(uint64_t block_offset, const Slice& key) {
return true; // Errors are treated as potential matches
}
}
} // namespace leveldb

14
table/filter_block.h
View File

@ -11,8 +11,10 @@
#include <stddef.h>
#include <stdint.h>
#include <string>
#include <vector>
#include "leveldb/slice.h"
#include "util/hash.h"
@ -38,10 +40,10 @@ class FilterBlockBuilder {
void GenerateFilter();
const FilterPolicy* policy_;
std::string keys_; // Flattened key contents
std::vector<size_t> start_; // Starting index in keys_ of each key
std::string result_; // Filter data computed so far
std::vector<Slice> tmp_keys_; // policy_->CreateFilter() argument
std::string keys_; // Flattened key contents
std::vector<size_t> start_; // Starting index in keys_ of each key
std::string result_; // Filter data computed so far
std::vector<Slice> tmp_keys_; // policy_->CreateFilter() argument
std::vector<uint32_t> filter_offsets_;
// No copying allowed
@ -51,7 +53,7 @@ class FilterBlockBuilder {
class FilterBlockReader {
public:
// REQUIRES: "contents" and *policy must stay live while *this is live.
// REQUIRES: "contents" and *policy must stay live while *this is live.
FilterBlockReader(const FilterPolicy* policy, const Slice& contents);
bool KeyMayMatch(uint64_t block_offset, const Slice& key);
@ -63,6 +65,6 @@ class FilterBlockReader {
size_t base_lg_; // Encoding parameter (see kFilterBaseLg in .cc file)
};
}
} // namespace leveldb
#endif // STORAGE_LEVELDB_TABLE_FILTER_BLOCK_H_

34
table/filter_block_test.cc
View File

@ -16,9 +16,7 @@ namespace leveldb {
// For testing: emit an array with one hash value per key
class TestHashFilter : public FilterPolicy {
public:
virtual const char* Name() const {
return "TestHashFilter";
}
virtual const char* Name() const { return "TestHashFilter"; }
virtual void CreateFilter(const Slice* keys, int n, std::string* dst) const {
for (int i = 0; i < n; i++) {
@ -69,8 +67,8 @@ TEST(FilterBlockTest, SingleChunk) {
ASSERT_TRUE(reader.KeyMayMatch(100, "box"));
ASSERT_TRUE(reader.KeyMayMatch(100, "hello"));
ASSERT_TRUE(reader.KeyMayMatch(100, "foo"));
ASSERT_TRUE(! reader.KeyMayMatch(100, "missing"));
ASSERT_TRUE(! reader.KeyMayMatch(100, "other"));
ASSERT_TRUE(!reader.KeyMayMatch(100, "missing"));
ASSERT_TRUE(!reader.KeyMayMatch(100, "other"));
}
TEST(FilterBlockTest, MultiChunk) {
@ -99,30 +97,28 @@ TEST(FilterBlockTest, MultiChunk) {
// Check first filter
ASSERT_TRUE(reader.KeyMayMatch(0, "foo"));
ASSERT_TRUE(reader.KeyMayMatch(2000, "bar"));
ASSERT_TRUE(! reader.KeyMayMatch(0, "box"));
ASSERT_TRUE(! reader.KeyMayMatch(0, "hello"));
ASSERT_TRUE(!reader.KeyMayMatch(0, "box"));
ASSERT_TRUE(!reader.KeyMayMatch(0, "hello"));
// Check second filter
ASSERT_TRUE(reader.KeyMayMatch(3100, "box"));
ASSERT_TRUE(! reader.KeyMayMatch(3100, "foo"));
ASSERT_TRUE(! reader.KeyMayMatch(3100, "bar"));
ASSERT_TRUE(! reader.KeyMayMatch(3100, "hello"));
ASSERT_TRUE(!reader.KeyMayMatch(3100, "foo"));
ASSERT_TRUE(!reader.KeyMayMatch(3100, "bar"));
ASSERT_TRUE(!reader.KeyMayMatch(3100, "hello"));
// Check third filter (empty)
ASSERT_TRUE(! reader.KeyMayMatch(4100, "foo"));
ASSERT_TRUE(! reader.KeyMayMatch(4100, "bar"));
ASSERT_TRUE(! reader.KeyMayMatch(4100, "box"));
ASSERT_TRUE(! reader.KeyMayMatch(4100, "hello"));
ASSERT_TRUE(!reader.KeyMayMatch(4100, "foo"));
ASSERT_TRUE(!reader.KeyMayMatch(4100, "bar"));
ASSERT_TRUE(!reader.KeyMayMatch(4100, "box"));
ASSERT_TRUE(!reader.KeyMayMatch(4100, "hello"));
// Check last filter
ASSERT_TRUE(reader.KeyMayMatch(9000, "box"));
ASSERT_TRUE(reader.KeyMayMatch(9000, "hello"));
ASSERT_TRUE(! reader.KeyMayMatch(9000, "foo"));
ASSERT_TRUE(! reader.KeyMayMatch(9000, "bar"));
ASSERT_TRUE(!reader.KeyMayMatch(9000, "foo"));
ASSERT_TRUE(!reader.KeyMayMatch(9000, "bar"));
}
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

11
table/format.cc
View File

@ -21,8 +21,7 @@ void BlockHandle::EncodeTo(std::string* dst) const {
}
Status BlockHandle::DecodeFrom(Slice* input) {
if (GetVarint64(input, &offset_) &&
GetVarint64(input, &size_)) {
if (GetVarint64(input, &offset_) && GetVarint64(input, &size_)) {
return Status::OK();
} else {
return Status::Corruption("bad block handle");
@ -62,10 +61,8 @@ Status Footer::DecodeFrom(Slice* input) {
return result;
}
Status ReadBlock(RandomAccessFile* file,
const ReadOptions& options,
const BlockHandle& handle,
BlockContents* result) {
Status ReadBlock(RandomAccessFile* file, const ReadOptions& options,
const BlockHandle& handle, BlockContents* result) {
result->data = Slice();
result->cachable = false;
result->heap_allocated = false;
@ -86,7 +83,7 @@ Status ReadBlock(RandomAccessFile* file,
}
// Check the crc of the type and the block contents
const char* data = contents.data(); // Pointer to where Read put the data
const char* data = contents.data(); // Pointer to where Read put the data
if (options.verify_checksums) {
const uint32_t crc = crc32c::Unmask(DecodeFixed32(data + n + 1));
const uint32_t actual = crc32c::Value(data, n + 1);

28
table/format.h
View File

@ -5,8 +5,10 @@
#ifndef STORAGE_LEVELDB_TABLE_FORMAT_H_
#define STORAGE_LEVELDB_TABLE_FORMAT_H_
#include <string>
#include <stdint.h>
#include <string>
#include "leveldb/slice.h"
#include "leveldb/status.h"
#include "leveldb/table_builder.h"
@ -46,19 +48,15 @@ class BlockHandle {
// end of every table file.
class Footer {
public:
Footer() { }
Footer() {}
// The block handle for the metaindex block of the table
const BlockHandle& metaindex_handle() const { return metaindex_handle_; }
void set_metaindex_handle(const BlockHandle& h) { metaindex_handle_ = h; }
// The block handle for the index block of the table
const BlockHandle& index_handle() const {
return index_handle_;
}
void set_index_handle(const BlockHandle& h) {
index_handle_ = h;
}
const BlockHandle& index_handle() const { return index_handle_; }
void set_index_handle(const BlockHandle& h) { index_handle_ = h; }
void EncodeTo(std::string* dst) const;
Status DecodeFrom(Slice* input);
@ -66,9 +64,7 @@ class Footer {
// Encoded length of a Footer. Note that the serialization of a
// Footer will always occupy exactly this many bytes. It consists
// of two block handles and a magic number.
enum {
kEncodedLength = 2*BlockHandle::kMaxEncodedLength + 8
};
enum { kEncodedLength = 2 * BlockHandle::kMaxEncodedLength + 8 };
private:
BlockHandle metaindex_handle_;
@ -91,17 +87,13 @@ struct BlockContents {
// Read the block identified by "handle" from "file". On failure
// return non-OK. On success fill *result and return OK.
Status ReadBlock(RandomAccessFile* file,
const ReadOptions& options,
const BlockHandle& handle,
BlockContents* result);
Status ReadBlock(RandomAccessFile* file, const ReadOptions& options,
const BlockHandle& handle, BlockContents* result);
// Implementation details follow. Clients should ignore,
inline BlockHandle::BlockHandle()
: offset_(~static_cast<uint64_t>(0)),
size_(~static_cast<uint64_t>(0)) {
}
: offset_(~static_cast<uint64_t>(0)), size_(~static_cast<uint64_t>(0)) {}
} // namespace leveldb

24
table/iterator.cc
View File

@ -14,7 +14,7 @@ Iterator::Iterator() {
Iterator::~Iterator() {
if (!cleanup_head_.IsEmpty()) {
cleanup_head_.Run();
for (CleanupNode* node = cleanup_head_.next; node != nullptr; ) {
for (CleanupNode* node = cleanup_head_.next; node != nullptr;) {
node->Run();
CleanupNode* next_node = node->next;
delete node;
@ -42,17 +42,23 @@ namespace {
class EmptyIterator : public Iterator {
public:
EmptyIterator(const Status& s) : status_(s) { }
EmptyIterator(const Status& s) : status_(s) {}
~EmptyIterator() override = default;
bool Valid() const override { return false; }
void Seek(const Slice& target) override { }
void SeekToFirst() override { }
void SeekToLast() override { }
void Seek(const Slice& target) override {}
void SeekToFirst() override {}
void SeekToLast() override {}
void Next() override { assert(false); }
void Prev() override { assert(false); }
Slice key() const override { assert(false); return Slice(); }
Slice value() const override { assert(false); return Slice(); }
Slice key() const override {
assert(false);
return Slice();
}
Slice value() const override {
assert(false);
return Slice();
}
Status status() const override { return status_; }
private:
@ -61,9 +67,7 @@ class EmptyIterator : public Iterator {
} // anonymous namespace
Iterator* NewEmptyIterator() {
return new EmptyIterator(Status::OK());
}
Iterator* NewEmptyIterator() { return new EmptyIterator(Status::OK()); }
Iterator* NewErrorIterator(const Status& status) {
return new EmptyIterator(status);

54
table/iterator_wrapper.h
View File

@ -16,10 +16,8 @@ namespace leveldb {
// cache locality.
class IteratorWrapper {
public:
IteratorWrapper(): iter_(nullptr), valid_(false) { }
explicit IteratorWrapper(Iterator* iter): iter_(nullptr) {
Set(iter);
}
IteratorWrapper() : iter_(nullptr), valid_(false) {}
explicit IteratorWrapper(Iterator* iter) : iter_(nullptr) { Set(iter); }
~IteratorWrapper() { delete iter_; }
Iterator* iter() const { return iter_; }
@ -35,18 +33,46 @@ class IteratorWrapper {
}
}
// Iterator interface methods
bool Valid() const { return valid_; }
Slice key() const { assert(Valid()); return key_; }
Slice value() const { assert(Valid()); return iter_->value(); }
bool Valid() const { return valid_; }
Slice key() const {
assert(Valid());
return key_;
}
Slice value() const {
assert(Valid());
return iter_->value();
}
// Methods below require iter() != nullptr
Status status() const { assert(iter_); return iter_->status(); }
void Next() { assert(iter_); iter_->Next(); Update(); }
void Prev() { assert(iter_); iter_->Prev(); Update(); }
void Seek(const Slice& k) { assert(iter_); iter_->Seek(k); Update(); }
void SeekToFirst() { assert(iter_); iter_->SeekToFirst(); Update(); }
void SeekToLast() { assert(iter_); iter_->SeekToLast(); Update(); }
Status status() const {
assert(iter_);
return iter_->status();
}
void Next() {
assert(iter_);
iter_->Next();
Update();
}
void Prev() {
assert(iter_);
iter_->Prev();
Update();
}
void Seek(const Slice& k) {
assert(iter_);
iter_->Seek(k);
Update();
}
void SeekToFirst() {
assert(iter_);
iter_->SeekToFirst();
Update();
}
void SeekToLast() {
assert(iter_);
iter_->SeekToLast();
Update();
}
private:
void Update() {

22
table/merger.cc
View File

@ -24,13 +24,9 @@ class MergingIterator : public Iterator {
}
}
virtual ~MergingIterator() {
delete[] children_;
}
virtual ~MergingIterator() { delete[] children_; }
virtual bool Valid() const {
return (current_ != nullptr);
}
virtual bool Valid() const { return (current_ != nullptr); }
virtual void SeekToFirst() {
for (int i = 0; i < n_; i++) {
@ -145,10 +141,7 @@ class MergingIterator : public Iterator {
IteratorWrapper* current_;
// Which direction is the iterator moving?
enum Direction {
kForward,
kReverse
};
enum Direction { kForward, kReverse };
Direction direction_;
};
@ -169,7 +162,7 @@ void MergingIterator::FindSmallest() {
void MergingIterator::FindLargest() {
IteratorWrapper* largest = nullptr;
for (int i = n_-1; i >= 0; i--) {
for (int i = n_ - 1; i >= 0; i--) {
IteratorWrapper* child = &children_[i];
if (child->Valid()) {
if (largest == nullptr) {
@ -183,14 +176,15 @@ void MergingIterator::FindLargest() {
}
} // namespace
Iterator* NewMergingIterator(const Comparator* cmp, Iterator** list, int n) {
Iterator* NewMergingIterator(const Comparator* comparator, Iterator** children,
int n) {
assert(n >= 0);
if (n == 0) {
return NewEmptyIterator();
} else if (n == 1) {
return list[0];
return children[0];
} else {
return new MergingIterator(cmp, list, n);
return new MergingIterator(comparator, children, n);
}
}

4
table/merger.h
View File

@ -18,8 +18,8 @@ class Iterator;
// key is present in K child iterators, it will be yielded K times.
//
// REQUIRES: n >= 0
Iterator* NewMergingIterator(
const Comparator* comparator, Iterator** children, int n);
Iterator* NewMergingIterator(const Comparator* comparator, Iterator** children,
int n);
} // namespace leveldb

35
table/table.cc
View File

@ -20,7 +20,7 @@ namespace leveldb {
struct Table::Rep {
~Rep() {
delete filter;
delete [] filter_data;
delete[] filter_data;
delete index_block;
}
@ -35,10 +35,8 @@ struct Table::Rep {
Block* index_block;
};
Status Table::Open(const Options& options,
RandomAccessFile* file,
uint64_t size,
Table** table) {
Status Table::Open(const Options& options, RandomAccessFile* file,
uint64_t size, Table** table) {
*table = nullptr;
if (size < Footer::kEncodedLength) {
return Status::Corruption("file is too short to be an sstable");
@ -130,14 +128,12 @@ void Table::ReadFilter(const Slice& filter_handle_value) {
return;
}
if (block.heap_allocated) {
rep_->filter_data = block.data.data(); // Will need to delete later
rep_->filter_data = block.data.data(); // Will need to delete later
}
rep_->filter = new FilterBlockReader(rep_->options.filter_policy, block.data);
}
Table::~Table() {
delete rep_;
}
Table::~Table() { delete rep_; }
static void DeleteBlock(void* arg, void* ignored) {
delete reinterpret_cast<Block*>(arg);
@ -156,8 +152,7 @@ static void ReleaseBlock(void* arg, void* h) {
// Convert an index iterator value (i.e., an encoded BlockHandle)
// into an iterator over the contents of the corresponding block.
Iterator* Table::BlockReader(void* arg,
const ReadOptions& options,
Iterator* Table::BlockReader(void* arg, const ReadOptions& options,
const Slice& index_value) {
Table* table = reinterpret_cast<Table*>(arg);
Cache* block_cache = table->rep_->options.block_cache;
@ -175,7 +170,7 @@ Iterator* Table::BlockReader(void* arg,
if (block_cache != nullptr) {
char cache_key_buffer[16];
EncodeFixed64(cache_key_buffer, table->rep_->cache_id);
EncodeFixed64(cache_key_buffer+8, handle.offset());
EncodeFixed64(cache_key_buffer + 8, handle.offset());
Slice key(cache_key_buffer, sizeof(cache_key_buffer));
cache_handle = block_cache->Lookup(key);
if (cache_handle != nullptr) {
@ -185,8 +180,8 @@ Iterator* Table::BlockReader(void* arg,
if (s.ok()) {
block = new Block(contents);
if (contents.cachable && options.fill_cache) {
cache_handle = block_cache->Insert(
key, block, block->size(), &DeleteCachedBlock);
cache_handle = block_cache->Insert(key, block, block->size(),
&DeleteCachedBlock);
}
}
}
@ -218,9 +213,9 @@ Iterator* Table::NewIterator(const ReadOptions& options) const {
&Table::BlockReader, const_cast<Table*>(this), options);
}
Status Table::InternalGet(const ReadOptions& options, const Slice& k,
void* arg,
void (*saver)(void*, const Slice&, const Slice&)) {
Status Table::InternalGet(const ReadOptions& options, const Slice& k, void* arg,
void (*handle_result)(void*, const Slice&,
const Slice&)) {
Status s;
Iterator* iiter = rep_->index_block->NewIterator(rep_->options.comparator);
iiter->Seek(k);
@ -228,15 +223,14 @@ Status Table::InternalGet(const ReadOptions& options, const Slice& k,
Slice handle_value = iiter->value();
FilterBlockReader* filter = rep_->filter;
BlockHandle handle;
if (filter != nullptr &&
handle.DecodeFrom(&handle_value).ok() &&
if (filter != nullptr && handle.DecodeFrom(&handle_value).ok() &&
!filter->KeyMayMatch(handle.offset(), k)) {
// Not found
} else {
Iterator* block_iter = BlockReader(this, options, iiter->value());
block_iter->Seek(k);
if (block_iter->Valid()) {
(*saver)(arg, block_iter->key(), block_iter->value());
(*handle_result)(arg, block_iter->key(), block_iter->value());
}
s = block_iter->status();
delete block_iter;
@ -249,7 +243,6 @@ Status Table::InternalGet(const ReadOptions& options, const Slice& k,
return s;
}
uint64_t Table::ApproximateOffsetOf(const Slice& key) const {
Iterator* index_iter =
rep_->index_block->NewIterator(rep_->options.comparator);

25
table/table_builder.cc
View File

@ -5,6 +5,7 @@
#include "leveldb/table_builder.h"
#include <assert.h>
#include "leveldb/comparator.h"
#include "leveldb/env.h"
#include "leveldb/filter_policy.h"
@ -27,7 +28,7 @@ struct TableBuilder::Rep {
BlockBuilder index_block;
std::string last_key;
int64_t num_entries;
bool closed; // Either Finish() or Abandon() has been called.
bool closed; // Either Finish() or Abandon() has been called.
FilterBlockBuilder* filter_block;
// We do not emit the index entry for a block until we have seen the
@ -53,8 +54,9 @@ struct TableBuilder::Rep {
index_block(&index_block_options),
num_entries(0),
closed(false),
filter_block(opt.filter_policy == nullptr ? nullptr
: new FilterBlockBuilder(opt.filter_policy)),
filter_block(opt.filter_policy == nullptr
? nullptr
: new FilterBlockBuilder(opt.filter_policy)),
pending_index_entry(false) {
index_block_options.block_restart_interval = 1;
}
@ -173,8 +175,7 @@ void TableBuilder::WriteBlock(BlockBuilder* block, BlockHandle* handle) {
}
void TableBuilder::WriteRawBlock(const Slice& block_contents,
CompressionType type,
BlockHandle* handle) {
CompressionType type, BlockHandle* handle) {
Rep* r = rep_;
handle->set_offset(r->offset);
handle->set_size(block_contents.size());
@ -184,7 +185,7 @@ void TableBuilder::WriteRawBlock(const Slice& block_contents,
trailer[0] = type;
uint32_t crc = crc32c::Value(block_contents.data(), block_contents.size());
crc = crc32c::Extend(crc, trailer, 1); // Extend crc to cover block type
EncodeFixed32(trailer+1, crc32c::Mask(crc));
EncodeFixed32(trailer + 1, crc32c::Mask(crc));
r->status = r->file->Append(Slice(trailer, kBlockTrailerSize));
if (r->status.ok()) {
r->offset += block_contents.size() + kBlockTrailerSize;
@ -192,9 +193,7 @@ void TableBuilder::WriteRawBlock(const Slice& block_contents,
}
}
Status TableBuilder::status() const {
return rep_->status;
}
Status TableBuilder::status() const { return rep_->status; }
Status TableBuilder::Finish() {
Rep* r = rep_;
@ -259,12 +258,8 @@ void TableBuilder::Abandon() {
r->closed = true;
}
uint64_t TableBuilder::NumEntries() const {
return rep_->num_entries;
}
uint64_t TableBuilder::NumEntries() const { return rep_->num_entries; }
uint64_t TableBuilder::FileSize() const {
return rep_->offset;
}
uint64_t TableBuilder::FileSize() const { return rep_->offset; }
} // namespace leveldb

208
table/table_test.cc
View File

@ -6,6 +6,7 @@
#include <map>
#include <string>
#include "db/dbformat.h"
#include "db/memtable.h"
#include "db/write_batch_internal.h"
@ -27,8 +28,8 @@ namespace leveldb {
static std::string Reverse(const Slice& key) {
std::string str(key.ToString());
std::string rev("");
for (std::string::reverse_iterator rit = str.rbegin();
rit != str.rend(); ++rit) {
for (std::string::reverse_iterator rit = str.rbegin(); rit != str.rend();
++rit) {
rev.push_back(*rit);
}
return rev;
@ -45,9 +46,8 @@ class ReverseKeyComparator : public Comparator {
return BytewiseComparator()->Compare(Reverse(a), Reverse(b));
}
virtual void FindShortestSeparator(
std::string* start,
const Slice& limit) const {
virtual void FindShortestSeparator(std::string* start,
const Slice& limit) const {
std::string s = Reverse(*start);
std::string l = Reverse(limit);
BytewiseComparator()->FindShortestSeparator(&s, l);
@ -79,17 +79,17 @@ namespace {
struct STLLessThan {
const Comparator* cmp;
STLLessThan() : cmp(BytewiseComparator()) { }
STLLessThan(const Comparator* c) : cmp(c) { }
STLLessThan() : cmp(BytewiseComparator()) {}
STLLessThan(const Comparator* c) : cmp(c) {}
bool operator()(const std::string& a, const std::string& b) const {
return cmp->Compare(Slice(a), Slice(b)) < 0;
}
};
} // namespace
class StringSink: public WritableFile {
class StringSink : public WritableFile {
public:
~StringSink() { }
~StringSink() {}
const std::string& contents() const { return contents_; }
@ -106,19 +106,17 @@ class StringSink: public WritableFile {
std::string contents_;
};
class StringSource: public RandomAccessFile {
class StringSource : public RandomAccessFile {
public:
StringSource(const Slice& contents)
: contents_(contents.data(), contents.size()) {
}
: contents_(contents.data(), contents.size()) {}
virtual ~StringSource() { }
virtual ~StringSource() {}
uint64_t Size() const { return contents_.size(); }
virtual Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const {
char* scratch) const {
if (offset >= contents_.size()) {
return Status::InvalidArgument("invalid Read offset");
}
@ -140,8 +138,8 @@ typedef std::map<std::string, std::string, STLLessThan> KVMap;
// BlockBuilder/TableBuilder and Block/Table.
class Constructor {
public:
explicit Constructor(const Comparator* cmp) : data_(STLLessThan(cmp)) { }
virtual ~Constructor() { }
explicit Constructor(const Comparator* cmp) : data_(STLLessThan(cmp)) {}
virtual ~Constructor() {}
void Add(const std::string& key, const Slice& value) {
data_[key] = value.ToString();
@ -150,14 +148,11 @@ class Constructor {
// Finish constructing the data structure with all the keys that have
// been added so far. Returns the keys in sorted order in "*keys"
// and stores the key/value pairs in "*kvmap"
void Finish(const Options& options,
std::vector<std::string>* keys,
void Finish(const Options& options, std::vector<std::string>* keys,
KVMap* kvmap) {
*kvmap = data_;
keys->clear();
for (KVMap::const_iterator it = data_.begin();
it != data_.end();
++it) {
for (KVMap::const_iterator it = data_.begin(); it != data_.end(); ++it) {
keys->push_back(it->first);
}
data_.clear();
@ -178,23 +173,17 @@ class Constructor {
KVMap data_;
};
class BlockConstructor: public Constructor {
class BlockConstructor : public Constructor {
public:
explicit BlockConstructor(const Comparator* cmp)
: Constructor(cmp),
comparator_(cmp),
block_(nullptr) { }
~BlockConstructor() {
delete block_;
}
: Constructor(cmp), comparator_(cmp), block_(nullptr) {}
~BlockConstructor() { delete block_; }
virtual Status FinishImpl(const Options& options, const KVMap& data) {
delete block_;
block_ = nullptr;
BlockBuilder builder(&options);
for (KVMap::const_iterator it = data.begin();
it != data.end();
++it) {
for (KVMap::const_iterator it = data.begin(); it != data.end(); ++it) {
builder.Add(it->first, it->second);
}
// Open the block
@ -218,23 +207,17 @@ class BlockConstructor: public Constructor {
BlockConstructor();
};
class TableConstructor: public Constructor {
class TableConstructor : public Constructor {
public:
TableConstructor(const Comparator* cmp)
: Constructor(cmp),
source_(nullptr), table_(nullptr) {
}
~TableConstructor() {
Reset();
}
: Constructor(cmp), source_(nullptr), table_(nullptr) {}
~TableConstructor() { Reset(); }
virtual Status FinishImpl(const Options& options, const KVMap& data) {
Reset();
StringSink sink;
TableBuilder builder(options, &sink);
for (KVMap::const_iterator it = data.begin();
it != data.end();
++it) {
for (KVMap::const_iterator it = data.begin(); it != data.end(); ++it) {
builder.Add(it->first, it->second);
ASSERT_TRUE(builder.status().ok());
}
@ -273,9 +256,9 @@ class TableConstructor: public Constructor {
};
// A helper class that converts internal format keys into user keys
class KeyConvertingIterator: public Iterator {
class KeyConvertingIterator : public Iterator {
public:
explicit KeyConvertingIterator(Iterator* iter) : iter_(iter) { }
explicit KeyConvertingIterator(Iterator* iter) : iter_(iter) {}
virtual ~KeyConvertingIterator() { delete iter_; }
virtual bool Valid() const { return iter_->Valid(); }
virtual void Seek(const Slice& target) {
@ -313,25 +296,20 @@ class KeyConvertingIterator: public Iterator {
void operator=(const KeyConvertingIterator&);
};
class MemTableConstructor: public Constructor {
class MemTableConstructor : public Constructor {
public:
explicit MemTableConstructor(const Comparator* cmp)
: Constructor(cmp),
internal_comparator_(cmp) {
: Constructor(cmp), internal_comparator_(cmp) {
memtable_ = new MemTable(internal_comparator_);
memtable_->Ref();
}
~MemTableConstructor() {
memtable_->Unref();
}
~MemTableConstructor() { memtable_->Unref(); }
virtual Status FinishImpl(const Options& options, const KVMap& data) {
memtable_->Unref();
memtable_ = new MemTable(internal_comparator_);
memtable_->Ref();
int seq = 1;
for (KVMap::const_iterator it = data.begin();
it != data.end();
++it) {
for (KVMap::const_iterator it = data.begin(); it != data.end(); ++it) {
memtable_->Add(seq, kTypeValue, it->first, it->second);
seq++;
}
@ -346,24 +324,19 @@ class MemTableConstructor: public Constructor {
MemTable* memtable_;
};
class DBConstructor: public Constructor {
class DBConstructor : public Constructor {
public:
explicit DBConstructor(const Comparator* cmp)
: Constructor(cmp),
comparator_(cmp) {
: Constructor(cmp), comparator_(cmp) {
db_ = nullptr;
NewDB();
}
~DBConstructor() {
delete db_;
}
~DBConstructor() { delete db_; }
virtual Status FinishImpl(const Options& options, const KVMap& data) {
delete db_;
db_ = nullptr;
NewDB();
for (KVMap::const_iterator it = data.begin();
it != data.end();
++it) {
for (KVMap::const_iterator it = data.begin(); it != data.end(); ++it) {
WriteBatch batch;
batch.Put(it->first, it->second);
ASSERT_TRUE(db_->Write(WriteOptions(), &batch).ok());
@ -396,12 +369,7 @@ class DBConstructor: public Constructor {
DB* db_;
};
enum TestType {
TABLE_TEST,
BLOCK_TEST,
MEMTABLE_TEST,
DB_TEST
};
enum TestType { TABLE_TEST, BLOCK_TEST, MEMTABLE_TEST, DB_TEST };
struct TestArgs {
TestType type;
@ -410,33 +378,33 @@ struct TestArgs {
};
static const TestArgs kTestArgList[] = {
{ TABLE_TEST, false, 16 },
{ TABLE_TEST, false, 1 },
{ TABLE_TEST, false, 1024 },
{ TABLE_TEST, true, 16 },
{ TABLE_TEST, true, 1 },
{ TABLE_TEST, true, 1024 },
{TABLE_TEST, false, 16},
{TABLE_TEST, false, 1},
{TABLE_TEST, false, 1024},
{TABLE_TEST, true, 16},
{TABLE_TEST, true, 1},
{TABLE_TEST, true, 1024},
{ BLOCK_TEST, false, 16 },
{ BLOCK_TEST, false, 1 },
{ BLOCK_TEST, false, 1024 },
{ BLOCK_TEST, true, 16 },
{ BLOCK_TEST, true, 1 },
{ BLOCK_TEST, true, 1024 },
{BLOCK_TEST, false, 16},
{BLOCK_TEST, false, 1},
{BLOCK_TEST, false, 1024},
{BLOCK_TEST, true, 16},
{BLOCK_TEST, true, 1},
{BLOCK_TEST, true, 1024},
// Restart interval does not matter for memtables
{ MEMTABLE_TEST, false, 16 },
{ MEMTABLE_TEST, true, 16 },
// Restart interval does not matter for memtables
{MEMTABLE_TEST, false, 16},
{MEMTABLE_TEST, true, 16},
// Do not bother with restart interval variations for DB
{ DB_TEST, false, 16 },
{ DB_TEST, true, 16 },
// Do not bother with restart interval variations for DB
{DB_TEST, false, 16},
{DB_TEST, true, 16},
};
static const int kNumTestArgs = sizeof(kTestArgList) / sizeof(kTestArgList[0]);
class Harness {
public:
Harness() : constructor_(nullptr) { }
Harness() : constructor_(nullptr) {}
void Init(const TestArgs& args) {
delete constructor_;
@ -466,9 +434,7 @@ class Harness {
}
}
~Harness() {
delete constructor_;
}
~Harness() { delete constructor_; }
void Add(const std::string& key, const std::string& value) {
constructor_->Add(key, value);
@ -490,8 +456,7 @@ class Harness {
ASSERT_TRUE(!iter->Valid());
iter->SeekToFirst();
for (KVMap::const_iterator model_iter = data.begin();
model_iter != data.end();
++model_iter) {
model_iter != data.end(); ++model_iter) {
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
iter->Next();
}
@ -505,8 +470,7 @@ class Harness {
ASSERT_TRUE(!iter->Valid());
iter->SeekToLast();
for (KVMap::const_reverse_iterator model_iter = data.rbegin();
model_iter != data.rend();
++model_iter) {
model_iter != data.rend(); ++model_iter) {
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
iter->Prev();
}
@ -514,8 +478,7 @@ class Harness {
delete iter;
}
void TestRandomAccess(Random* rnd,
const std::vector<std::string>& keys,
void TestRandomAccess(Random* rnd, const std::vector<std::string>& keys,
const KVMap& data) {
static const bool kVerbose = false;
Iterator* iter = constructor_->NewIterator();
@ -546,8 +509,8 @@ class Harness {
case 2: {
std::string key = PickRandomKey(rnd, keys);
model_iter = data.lower_bound(key);
if (kVerbose) fprintf(stderr, "Seek '%s'\n",
EscapeString(key).c_str());
if (kVerbose)
fprintf(stderr, "Seek '%s'\n", EscapeString(key).c_str());
iter->Seek(Slice(key));
ASSERT_EQ(ToString(data, model_iter), ToString(iter));
break;
@ -558,7 +521,7 @@ class Harness {
if (kVerbose) fprintf(stderr, "Prev\n");
iter->Prev();
if (model_iter == data.begin()) {
model_iter = data.end(); // Wrap around to invalid value
model_iter = data.end(); // Wrap around to invalid value
} else {
--model_iter;
}
@ -621,8 +584,8 @@ class Harness {
break;
case 1: {
// Attempt to return something smaller than an existing key
if (result.size() > 0 && result[result.size()-1] > '\0') {
result[result.size()-1]--;
if (!result.empty() && result[result.size() - 1] > '\0') {
result[result.size() - 1]--;
}
break;
}
@ -720,8 +683,8 @@ TEST(Harness, Randomized) {
for (int num_entries = 0; num_entries < 2000;
num_entries += (num_entries < 50 ? 1 : 200)) {
if ((num_entries % 10) == 0) {
fprintf(stderr, "case %d of %d: num_entries = %d\n",
(i + 1), int(kNumTestArgs), num_entries);
fprintf(stderr, "case %d of %d: num_entries = %d\n", (i + 1),
int(kNumTestArgs), num_entries);
}
for (int e = 0; e < num_entries; e++) {
std::string v;
@ -735,7 +698,7 @@ TEST(Harness, Randomized) {
TEST(Harness, RandomizedLongDB) {
Random rnd(test::RandomSeed());
TestArgs args = { DB_TEST, false, 16 };
TestArgs args = {DB_TEST, false, 16};
Init(args);
int num_entries = 100000;
for (int e = 0; e < num_entries; e++) {
@ -757,7 +720,7 @@ TEST(Harness, RandomizedLongDB) {
ASSERT_GT(files, 0);
}
class MemTableTest { };
class MemTableTest {};
TEST(MemTableTest, Simple) {
InternalKeyComparator cmp(BytewiseComparator());
@ -774,8 +737,7 @@ TEST(MemTableTest, Simple) {
Iterator* iter = memtable->NewIterator();
iter->SeekToFirst();
while (iter->Valid()) {
fprintf(stderr, "key: '%s' -> '%s'\n",
iter->key().ToString().c_str(),
fprintf(stderr, "key: '%s' -> '%s'\n", iter->key().ToString().c_str(),
iter->value().ToString().c_str());
iter->Next();
}
@ -788,14 +750,13 @@ static bool Between(uint64_t val, uint64_t low, uint64_t high) {
bool result = (val >= low) && (val <= high);
if (!result) {
fprintf(stderr, "Value %llu is not in range [%llu, %llu]\n",
(unsigned long long)(val),
(unsigned long long)(low),
(unsigned long long)(val), (unsigned long long)(low),
(unsigned long long)(high));
}
return result;
}
class TableTest { };
class TableTest {};
TEST(TableTest, ApproximateOffsetOfPlain) {
TableConstructor c(BytewiseComparator());
@ -813,18 +774,17 @@ TEST(TableTest, ApproximateOffsetOfPlain) {
options.compression = kNoCompression;
c.Finish(options, &keys, &kvmap);
ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01a"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 10000, 11000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("abc"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k01a"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k02"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k03"), 0, 0));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04"), 10000, 11000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k04a"), 210000, 211000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k05"), 210000, 211000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k06"), 510000, 511000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k07"), 510000, 511000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 610000, 612000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k05"), 210000, 211000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k06"), 510000, 511000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("k07"), 510000, 511000));
ASSERT_TRUE(Between(c.ApproximateOffsetOf("xyz"), 610000, 612000));
}
static bool SnappyCompressionSupported() {
@ -855,7 +815,7 @@ TEST(TableTest, ApproximateOffsetOfCompressed) {
// Expected upper and lower bounds of space used by compressible strings.
static const int kSlop = 1000; // Compressor effectiveness varies.
const int expected = 2500; // 10000 * compression ratio (0.25)
const int expected = 2500; // 10000 * compression ratio (0.25)
const int min_z = expected - kSlop;
const int max_z = expected + kSlop;
@ -871,6 +831,4 @@ TEST(TableTest, ApproximateOffsetOfCompressed) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

41
table/two_level_iterator.cc
View File

@ -15,13 +15,10 @@ namespace {
typedef Iterator* (*BlockFunction)(void*, const ReadOptions&, const Slice&);
class TwoLevelIterator: public Iterator {
class TwoLevelIterator : public Iterator {
public:
TwoLevelIterator(
Iterator* index_iter,
BlockFunction block_function,
void* arg,
const ReadOptions& options);
TwoLevelIterator(Iterator* index_iter, BlockFunction block_function,
void* arg, const ReadOptions& options);
virtual ~TwoLevelIterator();
@ -31,9 +28,7 @@ class TwoLevelIterator: public Iterator {
virtual void Next();
virtual void Prev();
virtual bool Valid() const {
return data_iter_.Valid();
}
virtual bool Valid() const { return data_iter_.Valid(); }
virtual Slice key() const {
assert(Valid());
return data_iter_.key();
@ -67,26 +62,22 @@ class TwoLevelIterator: public Iterator {
const ReadOptions options_;
Status status_;
IteratorWrapper index_iter_;
IteratorWrapper data_iter_; // May be nullptr
IteratorWrapper data_iter_; // May be nullptr
// If data_iter_ is non-null, then "data_block_handle_" holds the
// "index_value" passed to block_function_ to create the data_iter_.
std::string data_block_handle_;
};
TwoLevelIterator::TwoLevelIterator(
Iterator* index_iter,
BlockFunction block_function,
void* arg,
const ReadOptions& options)
TwoLevelIterator::TwoLevelIterator(Iterator* index_iter,
BlockFunction block_function, void* arg,
const ReadOptions& options)
: block_function_(block_function),
arg_(arg),
options_(options),
index_iter_(index_iter),
data_iter_(nullptr) {
}
data_iter_(nullptr) {}
TwoLevelIterator::~TwoLevelIterator() {
}
TwoLevelIterator::~TwoLevelIterator() {}
void TwoLevelIterator::Seek(const Slice& target) {
index_iter_.Seek(target);
@ -121,7 +112,6 @@ void TwoLevelIterator::Prev() {
SkipEmptyDataBlocksBackward();
}
void TwoLevelIterator::SkipEmptyDataBlocksForward() {
while (data_iter_.iter() == nullptr || !data_iter_.Valid()) {
// Move to next block
@ -158,7 +148,8 @@ void TwoLevelIterator::InitDataBlock() {
SetDataIterator(nullptr);
} else {
Slice handle = index_iter_.value();
if (data_iter_.iter() != nullptr && handle.compare(data_block_handle_) == 0) {
if (data_iter_.iter() != nullptr &&
handle.compare(data_block_handle_) == 0) {
// data_iter_ is already constructed with this iterator, so
// no need to change anything
} else {
@ -171,11 +162,9 @@ void TwoLevelIterator::InitDataBlock() {
} // namespace
Iterator* NewTwoLevelIterator(
Iterator* index_iter,
BlockFunction block_function,
void* arg,
const ReadOptions& options) {
Iterator* NewTwoLevelIterator(Iterator* index_iter,
BlockFunction block_function, void* arg,
const ReadOptions& options) {
return new TwoLevelIterator(index_iter, block_function, arg, options);
}

9
table/two_level_iterator.h
View File

@ -22,12 +22,9 @@ struct ReadOptions;
// an iterator over the contents of the corresponding block.
Iterator* NewTwoLevelIterator(
Iterator* index_iter,
Iterator* (*block_function)(
void* arg,
const ReadOptions& options,
const Slice& index_value),
void* arg,
const ReadOptions& options);
Iterator* (*block_function)(void* arg, const ReadOptions& options,
const Slice& index_value),
void* arg, const ReadOptions& options);
} // namespace leveldb

7
util/arena.cc
View File

@ -39,8 +39,9 @@ char* Arena::AllocateFallback(size_t bytes) {
char* Arena::AllocateAligned(size_t bytes) {
const int align = (sizeof(void*) > 8) ? sizeof(void*) : 8;
assert((align & (align-1)) == 0); // Pointer size should be a power of 2
size_t current_mod = reinterpret_cast<uintptr_t>(alloc_ptr_) & (align-1);
static_assert((align & (align - 1)) == 0,
"Pointer size should be a power of 2");
size_t current_mod = reinterpret_cast<uintptr_t>(alloc_ptr_) & (align - 1);
size_t slop = (current_mod == 0 ? 0 : align - current_mod);
size_t needed = bytes + slop;
char* result;
@ -52,7 +53,7 @@ char* Arena::AllocateAligned(size_t bytes) {
// AllocateFallback always returned aligned memory
result = AllocateFallback(bytes);
}
assert((reinterpret_cast<uintptr_t>(result) & (align-1)) == 0);
assert((reinterpret_cast<uintptr_t>(result) & (align - 1)) == 0);
return result;
}

17
util/arena_test.cc
View File

@ -9,11 +9,9 @@
namespace leveldb {
class ArenaTest { };
class ArenaTest {};
TEST(ArenaTest, Empty) {
Arena arena;
}
TEST(ArenaTest, Empty) { Arena arena; }
TEST(ArenaTest, Simple) {
std::vector<std::pair<size_t, char*> > allocated;
@ -26,8 +24,9 @@ TEST(ArenaTest, Simple) {
if (i % (N / 10) == 0) {
s = i;
} else {
s = rnd.OneIn(4000) ? rnd.Uniform(6000) :
(rnd.OneIn(10) ? rnd.Uniform(100) : rnd.Uniform(20));
s = rnd.OneIn(4000)
? rnd.Uniform(6000)
: (rnd.OneIn(10) ? rnd.Uniform(100) : rnd.Uniform(20));
}
if (s == 0) {
// Our arena disallows size 0 allocations.
@ -47,7 +46,7 @@ TEST(ArenaTest, Simple) {
bytes += s;
allocated.push_back(std::make_pair(s, r));
ASSERT_GE(arena.MemoryUsage(), bytes);
if (i > N/10) {
if (i > N / 10) {
ASSERT_LE(arena.MemoryUsage(), bytes * 1.10);
}
}
@ -63,6 +62,4 @@ TEST(ArenaTest, Simple) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

15
util/bloom.cc
View File

@ -20,17 +20,14 @@ class BloomFilterPolicy : public FilterPolicy {
size_t k_;
public:
explicit BloomFilterPolicy(int bits_per_key)
: bits_per_key_(bits_per_key) {
explicit BloomFilterPolicy(int bits_per_key) : bits_per_key_(bits_per_key) {
// We intentionally round down to reduce probing cost a little bit
k_ = static_cast<size_t>(bits_per_key * 0.69); // 0.69 =~ ln(2)
if (k_ < 1) k_ = 1;
if (k_ > 30) k_ = 30;
}
virtual const char* Name() const {
return "leveldb.BuiltinBloomFilter2";
}
virtual const char* Name() const { return "leveldb.BuiltinBloomFilter2"; }
virtual void CreateFilter(const Slice* keys, int n, std::string* dst) const {
// Compute bloom filter size (in both bits and bytes)
@ -54,7 +51,7 @@ class BloomFilterPolicy : public FilterPolicy {
const uint32_t delta = (h >> 17) | (h << 15); // Rotate right 17 bits
for (size_t j = 0; j < k_; j++) {
const uint32_t bitpos = h % bits;
array[bitpos/8] |= (1 << (bitpos % 8));
array[bitpos / 8] |= (1 << (bitpos % 8));
h += delta;
}
}
@ -69,7 +66,7 @@ class BloomFilterPolicy : public FilterPolicy {
// Use the encoded k so that we can read filters generated by
// bloom filters created using different parameters.
const size_t k = array[len-1];
const size_t k = array[len - 1];
if (k > 30) {
// Reserved for potentially new encodings for short bloom filters.
// Consider it a match.
@ -80,13 +77,13 @@ class BloomFilterPolicy : public FilterPolicy {
const uint32_t delta = (h >> 17) | (h << 15); // Rotate right 17 bits
for (size_t j = 0; j < k; j++) {
const uint32_t bitpos = h % bits;
if ((array[bitpos/8] & (1 << (bitpos % 8))) == 0) return false;
if ((array[bitpos / 8] & (1 << (bitpos % 8))) == 0) return false;
h += delta;
}
return true;
}
};
}
} // namespace
const FilterPolicy* NewBloomFilterPolicy(int bits_per_key) {
return new BloomFilterPolicy(bits_per_key);

46
util/bloom_test.cc
View File

@ -25,20 +25,16 @@ class BloomTest {
std::vector<std::string> keys_;
public:
BloomTest() : policy_(NewBloomFilterPolicy(10)) { }
BloomTest() : policy_(NewBloomFilterPolicy(10)) {}
~BloomTest() {
delete policy_;
}
~BloomTest() { delete policy_; }
void Reset() {
keys_.clear();
filter_.clear();
}
void Add(const Slice& s) {
keys_.push_back(s.ToString());
}
void Add(const Slice& s) { keys_.push_back(s.ToString()); }
void Build() {
std::vector<Slice> key_slices;
@ -52,16 +48,14 @@ class BloomTest {
if (kVerbose >= 2) DumpFilter();
}
size_t FilterSize() const {
return filter_.size();
}
size_t FilterSize() const { return filter_.size(); }
void DumpFilter() {
fprintf(stderr, "F(");
for (size_t i = 0; i+1 < filter_.size(); i++) {
for (size_t i = 0; i + 1 < filter_.size(); i++) {
const unsigned int c = static_cast<unsigned int>(filter_[i]);
for (int j = 0; j < 8; j++) {
fprintf(stderr, "%c", (c & (1 <<j)) ? '1' : '.');
fprintf(stderr, "%c", (c & (1 << j)) ? '1' : '.');
}
}
fprintf(stderr, ")\n");
@ -87,8 +81,8 @@ class BloomTest {
};
TEST(BloomTest, EmptyFilter) {
ASSERT_TRUE(! Matches("hello"));
ASSERT_TRUE(! Matches("world"));
ASSERT_TRUE(!Matches("hello"));
ASSERT_TRUE(!Matches("world"));
}
TEST(BloomTest, Small) {
@ -96,8 +90,8 @@ TEST(BloomTest, Small) {
Add("world");
ASSERT_TRUE(Matches("hello"));
ASSERT_TRUE(Matches("world"));
ASSERT_TRUE(! Matches("x"));
ASSERT_TRUE(! Matches("foo"));
ASSERT_TRUE(!Matches("x"));
ASSERT_TRUE(!Matches("foo"));
}
static int NextLength(int length) {
@ -140,23 +134,23 @@ TEST(BloomTest, VaryingLengths) {
double rate = FalsePositiveRate();
if (kVerbose >= 1) {
fprintf(stderr, "False positives: %5.2f%% @ length = %6d ; bytes = %6d\n",
rate*100.0, length, static_cast<int>(FilterSize()));
rate * 100.0, length, static_cast<int>(FilterSize()));
}
ASSERT_LE(rate, 0.02); // Must not be over 2%
if (rate > 0.0125) mediocre_filters++; // Allowed, but not too often
else good_filters++;
ASSERT_LE(rate, 0.02); // Must not be over 2%
if (rate > 0.0125)
mediocre_filters++; // Allowed, but not too often
else
good_filters++;
}
if (kVerbose >= 1) {
fprintf(stderr, "Filters: %d good, %d mediocre\n",
good_filters, mediocre_filters);
fprintf(stderr, "Filters: %d good, %d mediocre\n", good_filters,
mediocre_filters);
}
ASSERT_LE(mediocre_filters, good_filters/5);
ASSERT_LE(mediocre_filters, good_filters / 5);
}
// Different bits-per-byte
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

48
util/cache.cc
View File

@ -14,8 +14,7 @@
namespace leveldb {
Cache::~Cache() {
}
Cache::~Cache() {}
namespace {
@ -46,12 +45,12 @@ struct LRUHandle {
LRUHandle* next_hash;
LRUHandle* next;
LRUHandle* prev;
size_t charge; // TODO(opt): Only allow uint32_t?
size_t charge; // TODO(opt): Only allow uint32_t?
size_t key_length;
bool in_cache; // Whether entry is in the cache.
uint32_t refs; // References, including cache reference, if present.
uint32_t hash; // Hash of key(); used for fast sharding and comparisons
char key_data[1]; // Beginning of key
bool in_cache; // Whether entry is in the cache.
uint32_t refs; // References, including cache reference, if present.
uint32_t hash; // Hash of key(); used for fast sharding and comparisons
char key_data[1]; // Beginning of key
Slice key() const {
// next_ is only equal to this if the LRU handle is the list head of an
@ -114,8 +113,7 @@ class HandleTable {
// pointer to the trailing slot in the corresponding linked list.
LRUHandle** FindPointer(const Slice& key, uint32_t hash) {
LRUHandle** ptr = &list_[hash & (length_ - 1)];
while (*ptr != nullptr &&
((*ptr)->hash != hash || key != (*ptr)->key())) {
while (*ptr != nullptr && ((*ptr)->hash != hash || key != (*ptr)->key())) {
ptr = &(*ptr)->next_hash;
}
return ptr;
@ -158,8 +156,8 @@ class LRUCache {
void SetCapacity(size_t capacity) { capacity_ = capacity; }
// Like Cache methods, but with an extra "hash" parameter.
Cache::Handle* Insert(const Slice& key, uint32_t hash,
void* value, size_t charge,
Cache::Handle* Insert(const Slice& key, uint32_t hash, void* value,
size_t charge,
void (*deleter)(const Slice& key, void* value));
Cache::Handle* Lookup(const Slice& key, uint32_t hash);
void Release(Cache::Handle* handle);
@ -172,7 +170,7 @@ class LRUCache {
private:
void LRU_Remove(LRUHandle* e);
void LRU_Append(LRUHandle*list, LRUHandle* e);
void LRU_Append(LRUHandle* list, LRUHandle* e);
void Ref(LRUHandle* e);
void Unref(LRUHandle* e);
bool FinishErase(LRUHandle* e) EXCLUSIVE_LOCKS_REQUIRED(mutex_);
@ -206,7 +204,7 @@ LRUCache::LRUCache() : capacity_(0), usage_(0) {
LRUCache::~LRUCache() {
assert(in_use_.next == &in_use_); // Error if caller has an unreleased handle
for (LRUHandle* e = lru_.next; e != &lru_; ) {
for (LRUHandle* e = lru_.next; e != &lru_;) {
LRUHandle* next = e->next;
assert(e->in_cache);
e->in_cache = false;
@ -265,13 +263,14 @@ void LRUCache::Release(Cache::Handle* handle) {
Unref(reinterpret_cast<LRUHandle*>(handle));
}
Cache::Handle* LRUCache::Insert(
const Slice& key, uint32_t hash, void* value, size_t charge,
void (*deleter)(const Slice& key, void* value)) {
Cache::Handle* LRUCache::Insert(const Slice& key, uint32_t hash, void* value,
size_t charge,
void (*deleter)(const Slice& key,
void* value)) {
MutexLock l(&mutex_);
LRUHandle* e = reinterpret_cast<LRUHandle*>(
malloc(sizeof(LRUHandle)-1 + key.size()));
LRUHandle* e =
reinterpret_cast<LRUHandle*>(malloc(sizeof(LRUHandle) - 1 + key.size()));
e->value = value;
e->deleter = deleter;
e->charge = charge;
@ -346,19 +345,16 @@ class ShardedLRUCache : public Cache {
return Hash(s.data(), s.size(), 0);
}
static uint32_t Shard(uint32_t hash) {
return hash >> (32 - kNumShardBits);
}
static uint32_t Shard(uint32_t hash) { return hash >> (32 - kNumShardBits); }
public:
explicit ShardedLRUCache(size_t capacity)
: last_id_(0) {
explicit ShardedLRUCache(size_t capacity) : last_id_(0) {
const size_t per_shard = (capacity + (kNumShards - 1)) / kNumShards;
for (int s = 0; s < kNumShards; s++) {
shard_[s].SetCapacity(per_shard);
}
}
virtual ~ShardedLRUCache() { }
virtual ~ShardedLRUCache() {}
virtual Handle* Insert(const Slice& key, void* value, size_t charge,
void (*deleter)(const Slice& key, void* value)) {
const uint32_t hash = HashSlice(key);
@ -399,8 +395,6 @@ class ShardedLRUCache : public Cache {
} // end anonymous namespace
Cache* NewLRUCache(size_t capacity) {
return new ShardedLRUCache(capacity);
}
Cache* NewLRUCache(size_t capacity) { return new ShardedLRUCache(capacity); }
} // namespace leveldb

44
util/cache_test.cc
View File

@ -37,13 +37,9 @@ class CacheTest {
std::vector<int> deleted_values_;
Cache* cache_;
CacheTest() : cache_(NewLRUCache(kCacheSize)) {
current_ = this;
}
CacheTest() : cache_(NewLRUCache(kCacheSize)) { current_ = this; }
~CacheTest() {
delete cache_;
}
~CacheTest() { delete cache_; }
int Lookup(int key) {
Cache::Handle* handle = cache_->Lookup(EncodeKey(key));
@ -64,9 +60,7 @@ class CacheTest {
&CacheTest::Deleter);
}
void Erase(int key) {
cache_->Erase(EncodeKey(key));
}
void Erase(int key) { cache_->Erase(EncodeKey(key)); }
};
CacheTest* CacheTest::current_;
@ -75,18 +69,18 @@ TEST(CacheTest, HitAndMiss) {
Insert(100, 101);
ASSERT_EQ(101, Lookup(100));
ASSERT_EQ(-1, Lookup(200));
ASSERT_EQ(-1, Lookup(300));
ASSERT_EQ(-1, Lookup(200));
ASSERT_EQ(-1, Lookup(300));
Insert(200, 201);
ASSERT_EQ(101, Lookup(100));
ASSERT_EQ(201, Lookup(200));
ASSERT_EQ(-1, Lookup(300));
ASSERT_EQ(-1, Lookup(300));
Insert(100, 102);
ASSERT_EQ(102, Lookup(100));
ASSERT_EQ(201, Lookup(200));
ASSERT_EQ(-1, Lookup(300));
ASSERT_EQ(-1, Lookup(300));
ASSERT_EQ(1, deleted_keys_.size());
ASSERT_EQ(100, deleted_keys_[0]);
@ -100,14 +94,14 @@ TEST(CacheTest, Erase) {
Insert(100, 101);
Insert(200, 201);
Erase(100);
ASSERT_EQ(-1, Lookup(100));
ASSERT_EQ(-1, Lookup(100));
ASSERT_EQ(201, Lookup(200));
ASSERT_EQ(1, deleted_keys_.size());
ASSERT_EQ(100, deleted_keys_[0]);
ASSERT_EQ(101, deleted_values_[0]);
Erase(100);
ASSERT_EQ(-1, Lookup(100));
ASSERT_EQ(-1, Lookup(100));
ASSERT_EQ(201, Lookup(200));
ASSERT_EQ(1, deleted_keys_.size());
}
@ -146,8 +140,8 @@ TEST(CacheTest, EvictionPolicy) {
// Frequently used entry must be kept around,
// as must things that are still in use.
for (int i = 0; i < kCacheSize + 100; i++) {
Insert(1000+i, 2000+i);
ASSERT_EQ(2000+i, Lookup(1000+i));
Insert(1000 + i, 2000 + i);
ASSERT_EQ(2000 + i, Lookup(1000 + i));
ASSERT_EQ(101, Lookup(100));
}
ASSERT_EQ(101, Lookup(100));
@ -160,12 +154,12 @@ TEST(CacheTest, UseExceedsCacheSize) {
// Overfill the cache, keeping handles on all inserted entries.
std::vector<Cache::Handle*> h;
for (int i = 0; i < kCacheSize + 100; i++) {
h.push_back(InsertAndReturnHandle(1000+i, 2000+i));
h.push_back(InsertAndReturnHandle(1000 + i, 2000 + i));
}
// Check that all the entries can be found in the cache.
for (int i = 0; i < h.size(); i++) {
ASSERT_EQ(2000+i, Lookup(1000+i));
ASSERT_EQ(2000 + i, Lookup(1000 + i));
}
for (int i = 0; i < h.size(); i++) {
@ -181,9 +175,9 @@ TEST(CacheTest, HeavyEntries) {
const int kHeavy = 10;
int added = 0;
int index = 0;
while (added < 2*kCacheSize) {
while (added < 2 * kCacheSize) {
const int weight = (index & 1) ? kLight : kHeavy;
Insert(index, 1000+index, weight);
Insert(index, 1000 + index, weight);
added += weight;
index++;
}
@ -194,10 +188,10 @@ TEST(CacheTest, HeavyEntries) {
int r = Lookup(i);
if (r >= 0) {
cached_weight += weight;
ASSERT_EQ(1000+i, r);
ASSERT_EQ(1000 + i, r);
}
}
ASSERT_LE(cached_weight, kCacheSize + kCacheSize/10);
ASSERT_LE(cached_weight, kCacheSize + kCacheSize / 10);
}
TEST(CacheTest, NewId) {
@ -229,6 +223,4 @@ TEST(CacheTest, ZeroSizeCache) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

66
util/coding.cc
View File

@ -6,29 +6,29 @@
namespace leveldb {
void EncodeFixed32(char* buf, uint32_t value) {
void EncodeFixed32(char* dst, uint32_t value) {
if (port::kLittleEndian) {
memcpy(buf, &value, sizeof(value));
memcpy(dst, &value, sizeof(value));
} else {
buf[0] = value & 0xff;
buf[1] = (value >> 8) & 0xff;
buf[2] = (value >> 16) & 0xff;
buf[3] = (value >> 24) & 0xff;
dst[0] = value & 0xff;
dst[1] = (value >> 8) & 0xff;
dst[2] = (value >> 16) & 0xff;
dst[3] = (value >> 24) & 0xff;
}
}
void EncodeFixed64(char* buf, uint64_t value) {
void EncodeFixed64(char* dst, uint64_t value) {
if (port::kLittleEndian) {
memcpy(buf, &value, sizeof(value));
memcpy(dst, &value, sizeof(value));
} else {
buf[0] = value & 0xff;
buf[1] = (value >> 8) & 0xff;
buf[2] = (value >> 16) & 0xff;
buf[3] = (value >> 24) & 0xff;
buf[4] = (value >> 32) & 0xff;
buf[5] = (value >> 40) & 0xff;
buf[6] = (value >> 48) & 0xff;
buf[7] = (value >> 56) & 0xff;
dst[0] = value & 0xff;
dst[1] = (value >> 8) & 0xff;
dst[2] = (value >> 16) & 0xff;
dst[3] = (value >> 24) & 0xff;
dst[4] = (value >> 32) & 0xff;
dst[5] = (value >> 40) & 0xff;
dst[6] = (value >> 48) & 0xff;
dst[7] = (value >> 56) & 0xff;
}
}
@ -48,26 +48,26 @@ char* EncodeVarint32(char* dst, uint32_t v) {
// Operate on characters as unsigneds
unsigned char* ptr = reinterpret_cast<unsigned char*>(dst);
static const int B = 128;
if (v < (1<<7)) {
if (v < (1 << 7)) {
*(ptr++) = v;
} else if (v < (1<<14)) {
} else if (v < (1 << 14)) {
*(ptr++) = v | B;
*(ptr++) = v>>7;
} else if (v < (1<<21)) {
*(ptr++) = v >> 7;
} else if (v < (1 << 21)) {
*(ptr++) = v | B;
*(ptr++) = (v>>7) | B;
*(ptr++) = v>>14;
} else if (v < (1<<28)) {
*(ptr++) = (v >> 7) | B;
*(ptr++) = v >> 14;
} else if (v < (1 << 28)) {
*(ptr++) = v | B;
*(ptr++) = (v>>7) | B;
*(ptr++) = (v>>14) | B;
*(ptr++) = v>>21;
*(ptr++) = (v >> 7) | B;
*(ptr++) = (v >> 14) | B;
*(ptr++) = v >> 21;
} else {
*(ptr++) = v | B;
*(ptr++) = (v>>7) | B;
*(ptr++) = (v>>14) | B;
*(ptr++) = (v>>21) | B;
*(ptr++) = v>>28;
*(ptr++) = (v >> 7) | B;
*(ptr++) = (v >> 14) | B;
*(ptr++) = (v >> 21) | B;
*(ptr++) = v >> 28;
}
return reinterpret_cast<char*>(ptr);
}
@ -109,8 +109,7 @@ int VarintLength(uint64_t v) {
return len;
}
const char* GetVarint32PtrFallback(const char* p,
const char* limit,
const char* GetVarint32PtrFallback(const char* p, const char* limit,
uint32_t* value) {
uint32_t result = 0;
for (uint32_t shift = 0; shift <= 28 && p < limit; shift += 7) {
@ -181,8 +180,7 @@ const char* GetLengthPrefixedSlice(const char* p, const char* limit,
bool GetLengthPrefixedSlice(Slice* input, Slice* result) {
uint32_t len;
if (GetVarint32(input, &len) &&
input->size() >= len) {
if (GetVarint32(input, &len) && input->size() >= len) {
*result = Slice(input->data(), len);
input->remove_prefix(len);
return true;

14
util/coding.h
View File

@ -64,10 +64,10 @@ inline uint32_t DecodeFixed32(const char* ptr) {
memcpy(&result, ptr, sizeof(result)); // gcc optimizes this to a plain load
return result;
} else {
return ((static_cast<uint32_t>(static_cast<unsigned char>(ptr[0])))
| (static_cast<uint32_t>(static_cast<unsigned char>(ptr[1])) << 8)
| (static_cast<uint32_t>(static_cast<unsigned char>(ptr[2])) << 16)
| (static_cast<uint32_t>(static_cast<unsigned char>(ptr[3])) << 24));
return ((static_cast<uint32_t>(static_cast<unsigned char>(ptr[0]))) |
(static_cast<uint32_t>(static_cast<unsigned char>(ptr[1])) << 8) |
(static_cast<uint32_t>(static_cast<unsigned char>(ptr[2])) << 16) |
(static_cast<uint32_t>(static_cast<unsigned char>(ptr[3])) << 24));
}
}
@ -85,11 +85,9 @@ inline uint64_t DecodeFixed64(const char* ptr) {
}
// Internal routine for use by fallback path of GetVarint32Ptr
const char* GetVarint32PtrFallback(const char* p,
const char* limit,
const char* GetVarint32PtrFallback(const char* p, const char* limit,
uint32_t* value);
inline const char* GetVarint32Ptr(const char* p,
const char* limit,
inline const char* GetVarint32Ptr(const char* p, const char* limit,
uint32_t* value) {
if (p < limit) {
uint32_t result = *(reinterpret_cast<const unsigned char*>(p));

32
util/coding_test.cc
View File

@ -9,7 +9,7 @@
namespace leveldb {
class Coding { };
class Coding {};
TEST(Coding, Fixed32) {
std::string s;
@ -39,15 +39,15 @@ TEST(Coding, Fixed64) {
uint64_t v = static_cast<uint64_t>(1) << power;
uint64_t actual;
actual = DecodeFixed64(p);
ASSERT_EQ(v-1, actual);
ASSERT_EQ(v - 1, actual);
p += sizeof(uint64_t);
actual = DecodeFixed64(p);
ASSERT_EQ(v+0, actual);
ASSERT_EQ(v + 0, actual);
p += sizeof(uint64_t);
actual = DecodeFixed64(p);
ASSERT_EQ(v+1, actual);
ASSERT_EQ(v + 1, actual);
p += sizeof(uint64_t);
}
}
@ -108,8 +108,8 @@ TEST(Coding, Varint64) {
// Test values near powers of two
const uint64_t power = 1ull << k;
values.push_back(power);
values.push_back(power-1);
values.push_back(power+1);
values.push_back(power - 1);
values.push_back(power + 1);
}
std::string s;
@ -134,8 +134,8 @@ TEST(Coding, Varint64) {
TEST(Coding, Varint32Overflow) {
uint32_t result;
std::string input("\x81\x82\x83\x84\x85\x11");
ASSERT_TRUE(GetVarint32Ptr(input.data(), input.data() + input.size(), &result)
== nullptr);
ASSERT_TRUE(GetVarint32Ptr(input.data(), input.data() + input.size(),
&result) == nullptr);
}
TEST(Coding, Varint32Truncation) {
@ -146,16 +146,16 @@ TEST(Coding, Varint32Truncation) {
for (size_t len = 0; len < s.size() - 1; len++) {
ASSERT_TRUE(GetVarint32Ptr(s.data(), s.data() + len, &result) == nullptr);
}
ASSERT_TRUE(
GetVarint32Ptr(s.data(), s.data() + s.size(), &result) != nullptr);
ASSERT_TRUE(GetVarint32Ptr(s.data(), s.data() + s.size(), &result) !=
nullptr);
ASSERT_EQ(large_value, result);
}
TEST(Coding, Varint64Overflow) {
uint64_t result;
std::string input("\x81\x82\x83\x84\x85\x81\x82\x83\x84\x85\x11");
ASSERT_TRUE(GetVarint64Ptr(input.data(), input.data() + input.size(), &result)
== nullptr);
ASSERT_TRUE(GetVarint64Ptr(input.data(), input.data() + input.size(),
&result) == nullptr);
}
TEST(Coding, Varint64Truncation) {
@ -166,8 +166,8 @@ TEST(Coding, Varint64Truncation) {
for (size_t len = 0; len < s.size() - 1; len++) {
ASSERT_TRUE(GetVarint64Ptr(s.data(), s.data() + len, &result) == nullptr);
}
ASSERT_TRUE(
GetVarint64Ptr(s.data(), s.data() + s.size(), &result) != nullptr);
ASSERT_TRUE(GetVarint64Ptr(s.data(), s.data() + s.size(), &result) !=
nullptr);
ASSERT_EQ(large_value, result);
}
@ -193,6 +193,4 @@ TEST(Coding, Strings) {
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

15
util/comparator.cc
View File

@ -13,24 +13,21 @@
namespace leveldb {
Comparator::~Comparator() { }
Comparator::~Comparator() {}
namespace {
class BytewiseComparatorImpl : public Comparator {
public:
BytewiseComparatorImpl() { }
BytewiseComparatorImpl() {}
virtual const char* Name() const {
return "leveldb.BytewiseComparator";
}
virtual const char* Name() const { return "leveldb.BytewiseComparator"; }
virtual int Compare(const Slice& a, const Slice& b) const {
return a.compare(b);
}
virtual void FindShortestSeparator(
std::string* start,
const Slice& limit) const {
virtual void FindShortestSeparator(std::string* start,
const Slice& limit) const {
// Find length of common prefix
size_t min_length = std::min(start->size(), limit.size());
size_t diff_index = 0;
@ -59,7 +56,7 @@ class BytewiseComparatorImpl : public Comparator {
const uint8_t byte = (*key)[i];
if (byte != static_cast<uint8_t>(0xff)) {
(*key)[i] = byte + 1;
key->resize(i+1);
key->resize(i + 1);
return;
}
}

12
util/crc32c.cc
View File

@ -256,8 +256,8 @@ inline uint32_t ReadUint32LE(const uint8_t* buffer) {
template <int N>
constexpr inline const uint8_t* RoundUp(const uint8_t* pointer) {
return reinterpret_cast<uint8_t*>(
(reinterpret_cast<uintptr_t>(pointer) + (N - 1))
& ~static_cast<uintptr_t>(N - 1));
(reinterpret_cast<uintptr_t>(pointer) + (N - 1)) &
~static_cast<uintptr_t>(N - 1));
}
} // namespace
@ -273,14 +273,14 @@ static bool CanAccelerateCRC32C() {
return port::AcceleratedCRC32C(0, kTestCRCBuffer, kBufSize) == kTestCRCValue;
}
uint32_t Extend(uint32_t crc, const char* buf, size_t size) {
uint32_t Extend(uint32_t crc, const char* data, size_t n) {
static bool accelerate = CanAccelerateCRC32C();
if (accelerate) {
return port::AcceleratedCRC32C(crc, buf, size);
return port::AcceleratedCRC32C(crc, data, n);
}
const uint8_t* p = reinterpret_cast<const uint8_t*>(buf);
const uint8_t* e = p + size;
const uint8_t* p = reinterpret_cast<const uint8_t*>(data);
const uint8_t* e = p + n;
uint32_t l = crc ^ kCRC32Xor;
// Process one byte at a time.

4
util/crc32c.h
View File

@ -17,9 +17,7 @@ namespace crc32c {
uint32_t Extend(uint32_t init_crc, const char* data, size_t n);
// Return the crc32c of data[0,n-1]
inline uint32_t Value(const char* data, size_t n) {
return Extend(0, data, n);
}
inline uint32_t Value(const char* data, size_t n) { return Extend(0, data, n); }
static const uint32_t kMaskDelta = 0xa282ead8ul;

29
util/crc32c_test.cc
View File

@ -8,7 +8,7 @@
namespace leveldb {
namespace crc32c {
class CRC { };
class CRC {};
TEST(CRC, StandardResults) {
// From rfc3720 section B.4.
@ -31,29 +31,18 @@ TEST(CRC, StandardResults) {
ASSERT_EQ(0x113fdb5c, Value(buf, sizeof(buf)));
unsigned char data[48] = {
0x01, 0xc0, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x14, 0x00, 0x00, 0x00,
0x00, 0x00, 0x04, 0x00,
0x00, 0x00, 0x00, 0x14,
0x00, 0x00, 0x00, 0x18,
0x28, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x02, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x01, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00,
0x00, 0x00, 0x00, 0x14, 0x00, 0x00, 0x00, 0x18, 0x28, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
ASSERT_EQ(0xd9963a56, Value(reinterpret_cast<char*>(data), sizeof(data)));
}
TEST(CRC, Values) {
ASSERT_NE(Value("a", 1), Value("foo", 3));
}
TEST(CRC, Values) { ASSERT_NE(Value("a", 1), Value("foo", 3)); }
TEST(CRC, Extend) {
ASSERT_EQ(Value("hello world", 11),
Extend(Value("hello ", 6), "world", 5));
ASSERT_EQ(Value("hello world", 11), Extend(Value("hello ", 6), "world", 5));
}
TEST(CRC, Mask) {
@ -67,6 +56,4 @@ TEST(CRC, Mask) {
} // namespace crc32c
} // namespace leveldb
int main(int argc, char** argv) {
return leveldb::test::RunAllTests();
}
int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }

24
util/env.cc
View File

@ -6,27 +6,21 @@
namespace leveldb {
Env::~Env() {
}
Env::~Env() {}
Status Env::NewAppendableFile(const std::string& fname, WritableFile** result) {
return Status::NotSupported("NewAppendableFile", fname);
}
SequentialFile::~SequentialFile() {
}
SequentialFile::~SequentialFile() {}
RandomAccessFile::~RandomAccessFile() {
}
RandomAccessFile::~RandomAccessFile() {}
WritableFile::~WritableFile() {
}
WritableFile::~WritableFile() {}
Logger::~Logger() {
}
Logger::~Logger() {}
FileLock::~FileLock() {
}
FileLock::~FileLock() {}
void Log(Logger* info_log, const char* format, ...) {
if (info_log != nullptr) {
@ -38,8 +32,7 @@ void Log(Logger* info_log, const char* format, ...) {
}
static Status DoWriteStringToFile(Env* env, const Slice& data,
const std::string& fname,
bool should_sync) {
const std::string& fname, bool should_sync) {
WritableFile* file;
Status s = env->NewWritableFile(fname, &file);
if (!s.ok()) {
@ -94,7 +87,6 @@ Status ReadFileToString(Env* env, const std::string& fname, std::string* data) {
return s;
}
EnvWrapper::~EnvWrapper() {
}
EnvWrapper::~EnvWrapper() {}
} // namespace leveldb

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