Am 08.03.21 um 12:11 schrieb David Laight: > From: Stefan Metzmacher >> Sent: 07 March 2021 11:35 >> >> Hi André, >>> ** The wait on multiple problem >>> >>> The use case lies in the Wine implementation of the Windows NT interface >>> WaitMultipleObjects. This Windows API function allows a thread to sleep >>> waiting on the first of a set of event sources (mutexes, timers, signal, >>> console input, etc) to signal. > > They are all events. > You can only wait on either events or sockets (using select). > There is a socket api to signal an event when data arrives (etc). > There is also the insane (these days) restriction of 64 events. Ok. >> With that in mind would it be good to have some interaction with epoll (and similar calls)? > > Or hook something up so that pollwakeup can kick a futex as well > as waking up poll() and adding an event to epoll(). I guess as FUTEX_FD was already there and was removed we can stop this discussion. If there will every be the need to an async call, I guess a io_uring based one would be the best... metze
