On Fri, Jan 12, 2018 at 03:44:52PM -0500, Jeff Moyer wrote: > Christoph Hellwig <hch@xxxxxx> writes: > > > This is the io_getevents equivalent of ppoll/pselect and allows to > > properly mix signals and aio completions (especially with IOCB_CMD_POLL) > > and atomically executes the following sequence: > > > > sigset_t origmask; > > > > pthread_sigmask(SIG_SETMASK, &sigmask, &origmask); > > ret = io_getevents(ctx, min_nr, nr, events, timeout); > > pthread_sigmask(SIG_SETMASK, &origmask, NULL); > > > > Note that unlike many other signal related calls we do not pass a sigmask > > size, as that would get us to 7 arguments, which aren't easily supported > > by the syscall infrastructure. It seems a lot less painful to just add a > > new syscall variant in the unlikely case we're going to increase the > > sigset size. > > pselect, as an example, crams the sigmask and size together. Why not > just do that? libaio can take care of setting that up. Yes, I could try that. It's just another double indirection for no good reason.
