Given a nonzero
suspension returned by an invocation of
suspend, returns the corresponding reply event descriptor.
- macOS 10.3+
This descriptor, including any mutations, will be returned to the sender of the suspended event when handling of the event is resumed, if the sender has requested a reply. The effects of retaining the descriptor are undefined; it may be copied, but mutations of the copy are returned to the sender of the suspended event.
reply may be invoked in any thread, not just the one in which the corresponding invocation of