第二次调用将打开事件,但不会更改事件的状态。
我知道这一点是因为文档说它会打开它,但不会重置它。如果它重置了它,那么这一点就很重要了。
HANDLE responseWaitEvent = CreateEvent(NULL, // no security
TRUE, // manual-reset event
TRUE, // signaled
(LPTSTR)_T("TESTEvent")); // event name
assert(responseWaitEvent && "Could not create event");
responseWaitEvent = CreateEvent(NULL, // no security
TRUE, // manual-reset event
FALSE, // not signaled
(LPTSTR)_T("TESTEvent")); // event name
assert(responseWaitEvent && "Could not open event");
DWORD dw = WaitForSingleObjectEx(responseWaitEvent, 10000, FALSE);
assert(dw != WAIT_TIMEOUT);
反之亦然:
HANDLE responseWaitEvent2 = CreateEvent(NULL, // no security
TRUE, // manual-reset event
FALSE, // not signaled
(LPTSTR)_T("TESTEvent2")); // event name
assert(responseWaitEvent && "Could not create event");
responseWaitEvent2 = CreateEvent(NULL, // no security
TRUE, // manual-reset event
TRUE, // signaled
(LPTSTR)_T("TESTEvent2")); // event name
assert(responseWaitEvent && "Could not open event");
DWORD dw2 = WaitForSingleObjectEx(responseWaitEvent2, 10000, FALSE);
assert(dw2 == WAIT_TIMEOUT);