Behavior of WaitForMultipleObjects when multiple handles signal at the same time

Question

Given: I fill up an array of handles with auto reset events and pass it off to WaitForMultipleObjects with bWaitAll = FALSE.

From MSDN: “When bWaitAll is FALSE, th

Answer 1

Yes. One alternative would be that you could do WaitForSingleObject(handle, 0) on each handle which will return immediately and indicate if they are signaled or not.

EDIT: Here's sample pseudocode for what I mean:

ret = WaitForMultipleObjects()
if (ret >= WAIT_OBJECT_0 && ret < WAIT_OBJECT_0 + (count))
{
    firstSignaled = ret - WAIT_OBJECT_0;

    // handles[firstSignaled] guaranteed signalled!!

    for (i = firstSignaled + 1; i < count; i++)
    {
        if (WaitForSingleObject(handles[i], 0) == WAIT_OBJECT_0)
        {
           // handles[i] Signaled!
        }
    }
}