索求和释放“各个锁定”

注：调用 My WaitForSingleObject()会做出锁定操作，，调用ReleaseMutex()或RelaeseSemaphore()则会做出解除锁定的操作。

BOOL AcquireReadLock(RWLock *pLock){BOOL result = TRUE;if (!MyWaitForSingleObject(pLock->hMutex))return FALSE;if (++pLock->nReaderCount == 1)result = MyWaitForSingleObject(pLock->hDataLock);ReleaseMutex(pLock->hMutex);return result;}BOOL ReleaseReadLock(RWLock * pLock){int result;LONG lPrevCount;if (!MyWaitForSingleObject(pLock->hMutex))return FALSE;if (–pLock->nReaderCount == 0){result = ReleaseSemapore(pLock->hDataLock, 1, &lPrevCount);}ReleaseMutex(pLock->hMutex);return result;}BOOL AcquireWriteLock(RWLock *pLock){return MyWaitForSingleObject(pLock->hDataLock);}BOOL ReleaseWriteLock(RWLock *pLock){int result;LONG lPrevCount;result = ReleaseSemaphore(pLock->hDataLock, 1, &PrevCount);if (lPrevCount != 0)FatalError("ReleaseWriteLock – Semaphore was not locked!");return result;}

锁定数据的时机：

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