问题
Is there a way to know how much time passed from when I called WaitForSingleObject function untill it returned?
or that the only way of knowing is by using some kind of a timer?
回答1:
Just store current time before calling WaitForSingleObject(). Then compare to time when it returns.
From http://msdn.microsoft.com/en-us/library/windows/desktop/ms725473(v=vs.85).aspx - select a function to retrieve time.
回答2:
You will need to use a timer if you need to track that. The other alternative (although you won't get exact time, a timer would be better) is to call WaitForSingleObject with a small timeout value. You can check the return code to see if it is WAIT_TIMEOUT. If it is, then increment your time count by the timeout value.
回答3:
GetTickCount() before and after the call. Watch out for DWORD wrap-around.
来源：https://stackoverflow.com/questions/12936332/time-passed-till-waitforsingleobject-returned