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Implement TryWait for hsSemaphore

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This commit is contained in:
Adam Johnson
2012-03-28 19:24:33 -04:00
parent c70bb776ba
commit 43b9535e96
3 changed files with 20 additions and 0 deletions
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1
Sources/Plasma/CoreLib/hsThread.h
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@ -157,6 +157,7 @@ public:
hsSemaphore(int initialValue=0, const char* name=nil); hsSemaphore(int initialValue=0, const char* name=nil);
~hsSemaphore(); ~hsSemaphore();
hsBool TryWait();
hsBool Wait(hsMilliseconds timeToWait = kPosInfinity32); hsBool Wait(hsMilliseconds timeToWait = kPosInfinity32);
void Signal(); void Signal();
}; };

12
Sources/Plasma/CoreLib/hsThread_Unix.cpp
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@ -316,6 +316,18 @@ hsSemaphore::~hsSemaphore()
#endif #endif
} }
hsBool hsSemaphore::TryWait()
{
#ifdef USE_SEMA
int status = ::sem_trywait(fPSema);
return status != E_AGAIN;
#else
int status = ::pthread_mutex_trylock(&fPMutex);
hsThrowIfOSErr(status);
return status==EBUSY ? false : true;
#endif
}
hsBool hsSemaphore::Wait(hsMilliseconds timeToWait) hsBool hsSemaphore::Wait(hsMilliseconds timeToWait)
{ {
#ifdef USE_SEMA // SHOULDN'T THIS USE timeToWait??!?!? -rje #ifdef USE_SEMA // SHOULDN'T THIS USE timeToWait??!?!? -rje

7
Sources/Plasma/CoreLib/hsThread_Win.cpp
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@ -170,6 +170,13 @@ hsSemaphore::~hsSemaphore()
::CloseHandle(fSemaH); ::CloseHandle(fSemaH);
} }
hsBool hsSemaphore::TryWait()
{
DWORD result = ::WaitForSingleObject(fSemaH, 0);
hsAssert(result != WAIT_ABANDONED, "hsSemaphore -> Abandoned Semaphore");
return result == WAIT_OBJECT_0;
}
hsBool hsSemaphore::Wait(hsMilliseconds timeToWait) hsBool hsSemaphore::Wait(hsMilliseconds timeToWait)
{ {
if (timeToWait == kPosInfinity32) if (timeToWait == kPosInfinity32)