The porting layer implements threading primitives: atomic pointers,
condition variables, mutexes, thread-safe initialization. These are all
specified in C++11, so the reference open source port implementation can
become platform-independent.
The porting layer will remain in place to allow the use of other
implementations with more features, such as the built-in deadlock
detection in abseil's Mutex.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=193245934
ConsumeDecimalNumber has fairly non-trivial logic, and a previous
version has crashed inexplicably on Android. Having some test coverage
will make it easier to tweak / simplify the function later on.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=192821751
The CMake-based build relies on __has_include, which is standardized in
C++17. Unfortunately, __has_include is available without requiring
--std=c++17 on all the compilers on CI, so this problem was not caught.
Fixes https://github.com/google/leveldb/issues/572
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=192208842
C++11 requires <atomic>. This lets us remove the header detection
(LEVELDB_ATOMIC_PRESENT) and simplify port/atomic_pointer.h.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=189919098
This CL switches the public headers to C++11 default and deleted constructors, and adds override to the relevant leveldb::EnvWrapper methods. This should be a good test for C++11 compiler support.
Once this CL settles, the rest of the codebase can be safely modernized to C++11.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=189873212
