C++ ENTERCRITICALSECTION函數代碼示例

objrtn	Association_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (Association_c) {
		LEAVECRITICALSECTION(cs);
		return Association_c;
	}
	INHIBIT_THREADER;
	Association_c = gNewClass(Class, "Association", 0, 0, END);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return Association_c;
}

objrtn	ArgumentList_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (ArgumentList_c) {
		LEAVECRITICALSECTION(cs);
		return ArgumentList_c;
	}
	INHIBIT_THREADER;
	LinkObject_initialize();
	if (ArgumentList_c)  {
		ENABLE_THREADER;
		LEAVECRITICALSECTION(cs);
		return ArgumentList_c;
	}
	ArgumentList_c = gNewClass(Class, "ArgumentList", 0, 0, LinkObject, END);
	cMethodFor(ArgumentList, gNew, ArgumentList_cm_gNew);
	cMethodFor(ArgumentList, gNewArglist, ArgumentList_cm_gNewArglist);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return ArgumentList_c;
}

objrtn	InputStream_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (InputStream_c) {
		LEAVECRITICALSECTION(cs);
		return InputStream_c;
	}
	INHIBIT_THREADER;
	InputStream_c = gNewClass(Class, "InputStream", sizeof(InputStream_iv_t), 0, END);
	cMethodFor(InputStream, gNewWithStr, InputStream_cm_gNewWithStr);
	cMethodFor(InputStream, gNew, InputStream_cm_gNew);
	iMethodFor(InputStream, gDispose, InputStream_im_gDispose);
	iMethodFor(InputStream, gGCDispose, InputStream_im_gGCDispose);
	iMethodFor(InputStream, gLineHasColon, InputStream_im_gLineHasColon);
	iMethodFor(InputStream, gNextToken, InputStream_im_gNextToken);
	iMethodFor(InputStream, gDeepDispose, InputStream_im_gDispose);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return InputStream_c;
}

objrtn	SeriousCondition_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (SeriousCondition_c) {
		LEAVECRITICALSECTION(cs);
		return SeriousCondition_c;
	}
	INHIBIT_THREADER;
	Condition_initialize();
	if (SeriousCondition_c)  {
		ENABLE_THREADER;
		LEAVECRITICALSECTION(cs);
		return SeriousCondition_c;
	}
	SeriousCondition_c = gNewClass(Class, "SeriousCondition", 0, 0, Condition, END);
	iMethodFor(SeriousCondition, gDefaultRestart, SeriousCondition_im_gDefaultRestart);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return SeriousCondition_c;
}

objrtn	UnsignedShortInteger_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (UnsignedShortInteger_c) {
		LEAVECRITICALSECTION(cs);
		return UnsignedShortInteger_c;
	}
	INHIBIT_THREADER;
	Number_initialize();
	if (UnsignedShortInteger_c)  {
		ENABLE_THREADER;
		LEAVECRITICALSECTION(cs);
		return UnsignedShortInteger_c;
	}
	UnsignedShortInteger_c = gNewClass(Class, "UnsignedShortInteger", sizeof(UnsignedShortInteger_iv_t), 0, Number, END);
	cMethodFor(UnsignedShortInteger, gNewWithUnsigned, UnsignedShortInteger_cm_gNewWithUnsigned);
	iMethodFor(UnsignedShortInteger, gUnsignedShortValue, UnsignedShortInteger_im_gUnsignedShortValue);
	iMethodFor(UnsignedShortInteger, gChangeDoubleValue, UnsignedShortInteger_im_gChangeDoubleValue);
	iMethodFor(UnsignedShortInteger, gDoubleValue, UnsignedShortInteger_im_gDoubleValue);
	iMethodFor(UnsignedShortInteger, gCompare, UnsignedShortInteger_im_gCompare);
	iMethodFor(UnsignedShortInteger, gChangeLongValue, UnsignedShortInteger_im_gChangeLongValue);
	iMethodFor(UnsignedShortInteger, gChangeShortValue, UnsignedShortInteger_im_gChangeShortValue);
	iMethodFor(UnsignedShortInteger, gShortValue, UnsignedShortInteger_im_gShortValue);
	iMethodFor(UnsignedShortInteger, gPointerValue, UnsignedShortInteger_im_gPointerValue);
	iMethodFor(UnsignedShortInteger, gCharValue, UnsignedShortInteger_im_gCharValue);
	iMethodFor(UnsignedShortInteger, gStringRepValue, UnsignedShortInteger_im_gStringRepValue);
	iMethodFor(UnsignedShortInteger, gChangeUShortValue, UnsignedShortInteger_im_gChangeUShortValue);
	iMethodFor(UnsignedShortInteger, gHash, UnsignedShortInteger_im_gHash);
	iMethodFor(UnsignedShortInteger, gChangeValue, UnsignedShortInteger_im_gChangeValue);
	iMethodFor(UnsignedShortInteger, gLongValue, UnsignedShortInteger_im_gLongValue);
	iMethodFor(UnsignedShortInteger, gChangeCharValue, UnsignedShortInteger_im_gChangeCharValue);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return UnsignedShortInteger_c;
}

void MA_compact(void) 
{ 
	MemBlk *mb; 
	Header *fh, *mfh = NULL; 
	int i; 

	ENTERCRITICALSECTION(CS); 

	for (mb=MMBP ; mb ; mb = mb->next) { 
		fh = compact(mb); 
		if (fh) { 
			fh->next = mfh; 
			mfh = fh; 
		} 
	} 


	for (i=0 ; Map[i].userBytes ; ++i) 
		Map[i].h = NULL; 


	while (fh = mfh) { 
		mfh = fh->next; 
		fh->status = 'U'; 
		fh->next = NULL; 
		MA_free(fh+1); 
	} 
	LEAVECRITICALSECTION(CS); 
} 

void asCThreadManager::Unprepare()
{
	asASSERT(threadManager);

	if( threadManager == 0 )
		return;

	// It's necessary to protect this section so no
	// other thread attempts to call AddRef or Release
	// while clean up is in progress.
	ENTERCRITICALSECTION(threadManager->criticalSection);
	if( --threadManager->refCount == 0 )
	{
		// Make sure the local data is destroyed, at least for the current thread
		CleanupLocalData();

		// As the critical section will be destroyed together
		// with the thread manager we must first clear the global
		// variable in case a new thread manager needs to be created;
		asCThreadManager *mgr = threadManager;
		threadManager = 0;

		// Leave the critical section before it is destroyed
		LEAVECRITICALSECTION(mgr->criticalSection);

		asDELETE(mgr,asCThreadManager);
	}
	else
		LEAVECRITICALSECTION(threadManager->criticalSection);
}

asCThreadLocalData *asCThreadManager::GetLocalData()
{
	if( threadManager == 0 )
		return 0;

#ifndef AS_NO_THREADS
#if defined AS_POSIX_THREADS
	asPWORD id = (asPWORD)pthread_self();
#elif defined AS_WINDOWS_THREADS
	asPWORD id = (asPWORD)GetCurrentThreadId();
#endif

	ENTERCRITICALSECTION(threadManager->criticalSection);

	asCThreadLocalData *tld = threadManager->GetLocalData(id);
	if( tld == 0 )
	{
		// Create a new tld
		tld = asNEW(asCThreadLocalData)();
		if( tld )
			threadManager->SetLocalData(id, tld);
	}

	LEAVECRITICALSECTION(threadManager->criticalSection);

	return tld;
#else
	if( threadManager->tld == 0 )
		threadManager->tld = asNEW(asCThreadLocalData)();

	return threadManager->tld;
#endif
}

int asCGarbageCollector::GetObjectInGC(asUINT idx, asUINT *seqNbr, void **obj, asIObjectType **type)
{
	if( seqNbr ) *seqNbr = 0;
	if( obj )    *obj    = 0;
	if( type )   *type   = 0;

	ENTERCRITICALSECTION(gcCritical);
	asSObjTypePair *o = 0;
	asUINT newObjs = gcNewObjects.GetLength();
	if( idx < newObjs )
		o = &gcNewObjects[idx];
	else if( idx < gcOldObjects.GetLength() + newObjs )
		o = &gcOldObjects[idx-newObjs];
	else
	{
		LEAVECRITICALSECTION(gcCritical);
		return asINVALID_ARG;
	}
	if( seqNbr ) *seqNbr = o->seqNbr;
	if( obj )    *obj    = o->obj;
	if( type )   *type   = o->type;
	LEAVECRITICALSECTION(gcCritical);

	return asSUCCESS;
}

void asCGarbageCollector::IncreaseCounterForNewObject(int idx)
{
	// We need to protect this update with a critical section as
	// another thread might be appending an object at the same time
	ENTERCRITICALSECTION(gcCritical);
	gcNewObjects[idx].count++;
	LEAVECRITICALSECTION(gcCritical);
}

asDWORD asCAtomic::atomicDec()
{
	asDWORD v;
	ENTERCRITICALSECTION(cs);
	v = --value;
	LEAVECRITICALSECTION(cs);
	return v;
}

int asCGarbageCollector::AddScriptObjectToGC(void *obj, asCObjectType *objType)
{
	if( obj == 0 || objType == 0 )
	{
		engine->WriteMessage("", 0, 0, asMSGTYPE_ERROR, TXT_GC_RECEIVED_NULL_PTR);
		return asINVALID_ARG;
	}

	engine->CallObjectMethod(obj, objType->beh.addref);
	asSObjTypePair ot = {obj, objType, 0};

	// Invoke the garbage collector to destroy a little garbage as new comes in
	// This will maintain the number of objects in the GC at a maintainable level without
	// halting the application, and without burdening the application with manually invoking the 
	// garbage collector.
	if( engine->ep.autoGarbageCollect && gcNewObjects.GetLength() )
	{
		// If the GC is already processing in another thread, then don't try this again
		if( TRYENTERCRITICALSECTION(gcCollecting) )
		{
			// Skip this if the GC is already running in this thread
			if( !isProcessing )
			{
				isProcessing = true;

				// TODO: The number of iterations should be dynamic, and increase 
				//       if the number of objects in the garbage collector grows high

				// Run one step of DetectGarbage
				if( gcOldObjects.GetLength() )
				{
					IdentifyGarbageWithCyclicRefs();
					DestroyOldGarbage();
				}

				// Run a few steps of DestroyGarbage
				int iter = (int)gcNewObjects.GetLength();
				if( iter > 10 ) iter = 10;
				while( iter-- > 0 )
					DestroyNewGarbage();

				isProcessing = false;
			}

			LEAVECRITICALSECTION(gcCollecting);
		}
	}

	// Add the data to the gcObjects array in a critical section as
	// another thread might be calling this method at the same time
	ENTERCRITICALSECTION(gcCritical);
	ot.seqNbr = numAdded++;
	gcNewObjects.PushLast(ot);
	LEAVECRITICALSECTION(gcCritical);

	return ot.seqNbr;
}

void asCGarbageCollector::MoveAllObjectsToOldList()
{
	// We need to protect this update with a critical section as
	// another thread might be appending an object at the same time
	ENTERCRITICALSECTION(gcCritical);
	if( gcOldObjects.Concatenate(gcNewObjects) )
		gcNewObjects.SetLength(0);
	LEAVECRITICALSECTION(gcCritical);
}

objrtn	BufferedTempFile_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (BufferedTempFile_c) {
		LEAVECRITICALSECTION(cs);
		return BufferedTempFile_c;
	}
	INHIBIT_THREADER;
	BufferedTempFile_c = gNewClass(Class, "BufferedTempFile", sizeof(BufferedTempFile_iv_t), 0, END);
	cMethodFor(BufferedTempFile, gOpenTempFile, BufferedTempFile_cm_gOpenTempFile);
	iMethodFor(BufferedTempFile, gFlush, BufferedTempFile_im_gFlush);
	iMethodFor(BufferedTempFile, gRetreat, BufferedTempFile_im_gRetreat);
	iMethodFor(BufferedTempFile, gPosition, BufferedTempFile_im_gPosition);
	iMethodFor(BufferedTempFile, gLength, BufferedTempFile_im_gLength);
	iMethodFor(BufferedTempFile, gWrite, BufferedTempFile_im_gWrite);
	iMethodFor(BufferedTempFile, gEndOfStream, BufferedTempFile_im_gEndOfStream);
	iMethodFor(BufferedTempFile, gSeek, BufferedTempFile_im_gSeek);
	iMethodFor(BufferedTempFile, gPointerValue, BufferedTempFile_im_gPointerValue);
	iMethodFor(BufferedTempFile, gAdvance, BufferedTempFile_im_gAdvance);
	iMethodFor(BufferedTempFile, gDispose, BufferedTempFile_im_gDispose);
	iMethodFor(BufferedTempFile, gName, BufferedTempFile_im_gName);
	iMethodFor(BufferedTempFile, gGets, BufferedTempFile_im_gGets);
	iMethodFor(BufferedTempFile, gGCDispose, BufferedTempFile_im_gGCDispose);
	iMethodFor(BufferedTempFile, gDeepDispose, BufferedTempFile_im_gDispose);
	iMethodFor(BufferedTempFile, gRead, BufferedTempFile_im_gRead);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return BufferedTempFile_c;
}

objrtn	ObjectPool_initialize(void)
{
	static  CRITICALSECTION  cs;
	static  int volatile once = 0;

	ENTERCRITICALSECTION(_CI_CS_);
	if (!once) {
		INITIALIZECRITICALSECTION(cs);
		once = 1;
	}
	LEAVECRITICALSECTION(_CI_CS_);

	ENTERCRITICALSECTION(cs);

	if (ObjectPool_c) {
		LEAVECRITICALSECTION(cs);
		return ObjectPool_c;
	}
	INHIBIT_THREADER;
	ObjectPool_c = gNewClass(Class, "ObjectPool", sizeof(ObjectPool_iv_t), sizeof(ObjectPool_cv_t), END);
	cMethodFor(ObjectPool, gNewGlobalPoolWithSize, ObjectPool_cm_gNewGlobalPoolWithSize);
	cMethodFor(ObjectPool, gDisposeGlobalPool, ObjectPool_cm_gDisposeGlobalPool);
	cMethodFor(ObjectPool, gRemoveFromPool, ObjectPool_cm_gRemoveFromPool);
	cMethodFor(ObjectPool, gNewWithInt, ObjectPool_cm_gNewWithInt);
	cMethodFor(ObjectPool, gAddToPool, ObjectPool_cm_gAddToPool);
	cMethodFor(ObjectPool, gNew, ObjectPool_cm_gNew);
	cMethodFor(ObjectPool, gNewGlobalPool, ObjectPool_cm_gNewGlobalPool);
	cMethodFor(ObjectPool, gDisposeObject, ObjectPool_cm_gDisposeObject);
	iMethodFor(ObjectPool, gRemoveFromPool, ObjectPool_im_gRemoveFromPool);
	iMethodFor(ObjectPool, gAddToPool, ObjectPool_im_gAddToPool);
	iMethodFor(ObjectPool, gDispose, ObjectPool_im_gDispose);
	iMethodFor(ObjectPool, gDeepDispose, ObjectPool_im_gDispose);
	iMethodFor(ObjectPool, gDisposeObject, ObjectPool_im_gDisposeObject);

	ObjectPool_cv = GetCVs(ObjectPool);

	ENABLE_THREADER;

	LEAVECRITICALSECTION(cs);

	return ObjectPool_c;
}