每日一练--WaitForMultipleObjects

WaitForMultipleObjects

The WaitForMultipleObjects function returns when one of the following occurs:

• Either any one or all of the specified objects are in the signaled state.
• The time-out interval elapses.

DWORD WaitForMultipleObjects(
  DWORD nCount,             // number of handles in the handle array
  CONST HANDLE *lpHandles,  // pointer to the object-handle array
  BOOL fWaitAll,            // wait flag
  DWORD dwMilliseconds      // time-out interval in milliseconds
);

 

实例：

WSAEVENT wsaevt1=WSACreateEvent();

WSAEVENT wsaevt2=WSACreateEvent();
 HANDLE lpHandles[2];
 lpHandles[0]=wsaevt1;
 lpHandles[1]=wsaevt2;

while(1)

{

DWORD rc=WaitForMultipleObjects(2,lpHandles,FALSE,INFINITE);

if(rc==WSA_WAIT_FAILED)
  {
     break;
  }
  else if (rc==WAIT_OBJECT_0) 

  {
   break;
  }

  //do something

}

 

多线程程序中一般都有用到这个函数。