deepcrayon/stockfish
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When exiting wake up all threads at once

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It seems we have a very rare crash under Linux, once
every 10K games without this patch.

Is faster to wake up all the threads, especially on SMP,
where the threads can then exit in parallel while the main
thread is waiting for the next one to terminate.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2011-09-26 06:07:11 +01:00
parent 63a04134d0
commit 83d8fe2d59
1 changed files with 9 additions and 4 deletions
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13
src/thread.cpp
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@ -192,14 +192,19 @@ void ThreadsManager::init() {
void ThreadsManager::exit() {
// Wake up all the slave threads at once. This is faster than "wake and wait"
// for each thread and avoids a rare crash once every 10K games under Linux.
for (int i = 1; i < MAX_THREADS; i++)
{
threads[i].do_terminate = true;
threads[i].wake_up();
}
for (int i = 0; i < MAX_THREADS; i++)
{
// Wake up all the slave threads and wait for termination
if (i != 0)
{
threads[i].do_terminate = true;
threads[i].wake_up();
// Wait for slave termination
#if defined(_MSC_VER)
WaitForSingleObject(threads[i].handle, 0);
CloseHandle(threads[i].handle);