QueueUserWorkItem 初步学习

大家好，欢迎来到IT知识分享网。

 DWORD WINAPI TestThreadPool(PVOID pContext);

CRITICAL_SECTION g_cs;

int _tmain(int argc, _TCHAR* argv[])
{

 InitializeCriticalSection(&g_cs);
 SECURITY_ATTRIBUTES sa;
 sa.bInheritHandle = TRUE;
 sa.nLength = sizeof(SECURITY_ATTRIBUTES);
 sa.lpSecurityDescriptor = NULL;

 HANDLE hSemaphore = CreateSemaphoreW(&sa, 0 ,1, L”jyytet”); 

 for (int i = 0; i < 10; i++)
 {

  QueueUserWorkItem(TestThreadPool, L”Hello World”, WT_EXECUTEDEFAULT);
 }
 QueueUserWorkItem(TestThreadPool, L”Finish”, WT_EXECUTEDEFAULT);

 WaitForSingleObject(hSemaphore, -1);
 CloseHandle(hSemaphore);
 hSemaphore = NULL;
 DeleteCriticalSection(&g_cs);

 wprintf(L”Game over /r/n”);
 
 getchar();
 
 return 0;
}

DWORD WINAPI TestThreadPool(PVOID pContext)
{

 if (NULL == pContext)
  return 0;

 EnterCriticalSection(&g_cs);
 wchar_t *pPrintf = (wchar_t *) pContext;
 wprintf(L”%s /r/n”, pPrintf);
 Sleep(1000);
 
 if (wcscmp(pPrintf, L”Finish”) == 0)
 {

  HANDLE hSemaphore = OpenSemaphoreW(SEMAPHORE_ALL_ACCESS, FALSE,  L”jyytet”);
  assert(hSemaphore !=  NULL);
  ReleaseSemaphore(hSemaphore, 1, NULL);
  CloseHandle(hSemaphore);
 }
 LeaveCriticalSection(&g_cs);

 return 1;
}