| Platform SDK: DLLs, Processes, and Threads |
The PulseEvent function sets the specified event object to the signaled state and then resets it to the nonsignaled state after releasing the appropriate number of waiting threads.
BOOL PulseEvent( HANDLE hEvent // handle to event object );
Windows NT/2000: The handle must have EVENT_MODIFY_STATE access. For more information, see Synchronization Object Security and Access Rights.
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
For a manual-reset event object, all waiting threads that can be released immediately are released. The function then resets the event object's state to nonsignaled and returns.
For an auto-reset event object, the function resets the state to nonsignaled and returns after releasing a single waiting thread, even if multiple threads are waiting.
If no threads are waiting, or if no thread can be released immediately, PulseEvent simply sets the event object's state to nonsignaled and returns.
Note that for a thread using the multiple-object wait functions to wait for all specified objects to be signaled, PulseEvent can set the event object's state to signaled and reset it to nonsignaled without causing the wait function to return. This happens if not all of the specified objects are simultaneously signaled.
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winbase.h; include Windows.h.
Library: Use Kernel32.lib.
Synchronization Overview, Synchronization Functions, CreateEvent, OpenEvent, ResetEvent, SetEvent