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Use fast SRWLOCK locks under Windows

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They are fast and also have the same semantic of Linux ones.

This allow to simplify the code and especially to use
SleepConditionVariableSRW() to wait on a condition releaseing the lock,
this has the same semantic as pthread_cond_wait().

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2010-10-17 11:04:52 +01:00
parent 472971f851
commit 8fdc635255
2 changed files with 18 additions and 21 deletions
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src/search.cpp
+6 -13
View File
@@ -2224,8 +2224,7 @@ split_point_start: // At split points actual search starts from here
// If we are not thinking, wait for a condition to be signaled
// instead of wasting CPU time polling for work.
while ( threadID >= ActiveThreads
|| threads[threadID].state == THREAD_INITIALIZING)
while (threadID >= ActiveThreads || threads[threadID].state == THREAD_INITIALIZING)
{
assert(!sp);
assert(threadID != 0);
@@ -2235,14 +2234,12 @@ split_point_start: // At split points actual search starts from here
threads[threadID].state = THREAD_AVAILABLE;
#if !defined(_MSC_VER)
lock_grab(&WaitLock);
if (threadID >= ActiveThreads)
pthread_cond_wait(&WaitCond[threadID], &WaitLock);
if (threadID >= ActiveThreads || threads[threadID].state == THREAD_INITIALIZING)
cond_wait(&WaitCond[threadID], &WaitLock);
lock_release(&WaitLock);
#else
WaitForSingleObject(WaitCond[threadID], INFINITE);
#endif
}
// If this thread has been assigned work, launch a search
@@ -2305,11 +2302,7 @@ split_point_start: // At split points actual search starts from here
lock_init(&WaitLock);
for (i = 0; i < MAX_THREADS; i++)
#if !defined(_MSC_VER)
pthread_cond_init(&WaitCond[i], NULL);
#else
WaitCond[i] = CreateEvent(0, FALSE, FALSE, 0);
#endif
cond_init(&WaitCond[i]);
// Initialize splitPoints[] locks
for (i = 0; i < MAX_THREADS; i++)