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Code Issues Releases Wiki Activity

Check for thread creation successful completion

Browse source 
It is a good programming practice to verify a system
call has indeed succeed.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-01-24 12:24:01 +01:00
parent 290caf9960
commit 941016e7a2
1 changed files with 21 additions and 10 deletions
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31
src/search.cpp
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@ -573,6 +573,7 @@ bool think(const Position& pos, bool infinite, bool ponder, int side_to_move,
void init_threads() { void init_threads() {
volatile int i; volatile int i;
bool ok;
#if !defined(_MSC_VER) #if !defined(_MSC_VER)
pthread_t pthread[1]; pthread_t pthread[1];
@ -608,12 +609,18 @@ void init_threads() {
for(i = 1; i < THREAD_MAX; i++) for(i = 1; i < THREAD_MAX; i++)
{ {
#if !defined(_MSC_VER) #if !defined(_MSC_VER)
pthread_create(pthread, NULL, init_thread, (void*)(&i)); ok = (pthread_create(pthread, NULL, init_thread, (void*)(&i)) == 0);
#else #else
DWORD iID[1]; DWORD iID[1];
CreateThread(NULL, 0, init_thread, (LPVOID)(&i), 0, iID); ok = (CreateThread(NULL, 0, init_thread, (LPVOID)(&i), 0, iID) != NULL);
#endif #endif
if (!ok)
{
std::cout << "Failed to create thread number " << i << std::endl;
Application::exit_with_failure();
}
// Wait until the thread has finished launching // Wait until the thread has finished launching
while (!Threads[i].running); while (!Threads[i].running);
} }
@ -2012,7 +2019,7 @@ namespace {
// If another thread has failed high then sp->alpha has been increased // If another thread has failed high then sp->alpha has been increased
// to be higher or equal then beta, if so, avoid to start a PV search. // to be higher or equal then beta, if so, avoid to start a PV search.
localAlpha = sp->alpha; Value localAlpha = sp->alpha;
if (localAlpha < sp->beta) if (localAlpha < sp->beta)
value = -search_pv(pos, ss, -sp->beta, -localAlpha, newDepth, sp->ply+1, threadID); value = -search_pv(pos, ss, -sp->beta, -localAlpha, newDepth, sp->ply+1, threadID);
else else
@ -2780,13 +2787,17 @@ namespace {
} }
// If this thread has been assigned work, launch a search // If this thread has been assigned work, launch a search
if(Threads[threadID].workIsWaiting) { if (Threads[threadID].workIsWaiting)
Threads[threadID].workIsWaiting = false; {
if(Threads[threadID].splitPoint->pvNode) assert(!Threads[threadID].idle);
sp_search_pv(Threads[threadID].splitPoint, threadID);
else Threads[threadID].workIsWaiting = false;
sp_search(Threads[threadID].splitPoint, threadID); if (Threads[threadID].splitPoint->pvNode)
Threads[threadID].idle = true; sp_search_pv(Threads[threadID].splitPoint, threadID);
else
sp_search(Threads[threadID].splitPoint, threadID);
Threads[threadID].idle = true;
} }
// If this thread is the master of a split point and all threads have // If this thread is the master of a split point and all threads have