windows – 为什么WaitForSingleObject(INVALID_HANDLE_VALUE,INFINITE)会阻塞？

为什么

HANDLE mutexHandle = INVALID_HANDLE_VALUE;
WaitForSingleObject(mutexHandle,INFINITE);

块？它不会返回错误消息.检查INVALID_HANDLE的句柄对于互斥锁来说是愚蠢的,因为我需要一个互斥锁来访问互斥锁句柄…

BTW：如果句柄关闭,它确实返回WAIT_Failed.

从 http://blogs.msdn.com/oldnewthing/archive/2004/03/02/82639.aspx开始：

Fourth,you have to be particularly careful with the INVALID_HANDLE_VALUE value: By coincidence,the value INVALID_HANDLE_VALUE happens to be numerically equal to the pseudohandle returned by GetCurrentProcess(). Many kernel functions accept pseudohandles,so if if you mess up and accidentally call,say,WaitForSingleObject on a Failed INVALID_HANDLE_VALUE handle,you will actually end up waiting on your own process. This wait will,of course,never complete,because a process is signalled when it exits,so you ended up waiting for yourself.