3party/libzmq
0
0
Fork 0
mirror of https://github.com/zeromq/libzmq.git synced 2024-12-28 07:58:14 +08:00
Code Issues Projects Releases Wiki Activity

More bugs in mtrie fixed

Browse Source 
Aside of fixing couple of corner cases this patch turns the 'match'
function in mtrie from recursive to iterative.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
This commit is contained in:
Martin Sustrik 2011-09-16 16:34:28 +02:00
parent 5936379b29
commit e170136a2e
2 changed files with 26 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
src/mtrie.cpp
View File

@ -209,33 +209,36 @@ bool zmq::mtrie_t::rm_helper (unsigned char *prefix_, size_t size_,
void zmq::mtrie_t::match (unsigned char *data_, size_t size_,
void (*func_) (pipe_t *pipe_, void *arg_), void *arg_)
{
match_helper (data_, size_, func_, arg_);
}
mtrie_t *current = this;
while (size_) {
void zmq::mtrie_t::match_helper (unsigned char *data_, size_t size_,
void (*func_) (pipe_t *pipe_, void *arg_), void *arg_)
{
// TODO: This function is on critical path. Rewrite it as iteration
// rather than recursion.
// Signal the pipes attached to this node.
for (pipes_t::iterator it = current->pipes.begin ();
it != current->pipes.end (); ++it)
func_ (*it, arg_);
// Signal the pipes attached to this node.
for (pipes_t::iterator it = pipes.begin (); it != pipes.end (); ++it)
func_ (*it, arg_);
// If there are no subnodes in the trie, return.
if (current->count == 0)
break;
// If there are no subnodes in the trie, return.
if (count == 0)
return;
// If there's one subnode (optimisation).
if (current->count == 1) {
if (data_ [0] != current->min)
break;
current = current->next.node;
data_++;
size_--;
continue;
}
// If there's one subnode (optimisation).
if (count == 1) {
if (min == data_ [0])
next.node->match_helper (data_ + 1, size_ - 1, func_, arg_);
return;
// If there are multiple subnodes.
if (data_ [0] < min || data_ [0] >= min + count)
break;
if (!current->next.table [data_ [0] - min])
break;
current = current->next.table [data_ [0] - min];
data_++;
size_--;
}
// If there are multiple subnodes.
if (next.table [data_ [0] - min])
next.table [data_ [0] - min]->match_helper (data_ + 1, size_ - 1,
func_, arg_);
}

2
src/mtrie.hpp
View File

@ -67,8 +67,6 @@ namespace zmq
void *arg_);
bool rm_helper (unsigned char *prefix_, size_t size_,
class pipe_t *pipe_);
void match_helper (unsigned char *data_, size_t size_,
void (*func_) (class pipe_t *pipe_, void *arg_), void *arg_);
typedef std::set <class pipe_t*> pipes_t;
pipes_t pipes;