On Fri, Apr 1, 2011 at 10:17 PM, Jeff King <peff@xxxxxxxx> wrote: > On Fri, Apr 01, 2011 at 10:13:23PM +0200, Erik Faye-Lund wrote: > >> On Fri, Apr 1, 2011 at 10:05 PM, Jeff King <peff@xxxxxxxx> wrote: >> > On Fri, Apr 01, 2011 at 09:57:14PM +0200, Erik Faye-Lund wrote: >> > >> >> > But this does not help the case at hand in any way. How would you interrupt a >> >> > thread that is blocked in ReadFile()? The point of pthread_cancel() is that >> >> > it interrupts blocked system calls >> >> >> >> There is no mention of such a guarantee in POSIX (section 2.9.5 Thread >> >> Cancellation), so relying on that is undefined behavior. >> > >> > Eh? My pthreads(7) says that read() is required to be a cancellation >> > point acrroding to POSIX. I didn't dig up the actual reference in the >> > standard, though. >> >> I don't understand where the implementor would get that from after >> reading through it, but if there's something I've missed we can fix it >> by replacing my pthread_cancel with this, no? > > Out of curiosity, which POSIX are you reading? My page references > POSIX.1-2001, but technically pthreads were originally defined in > POSIX.1c-1995. > Sorry that I wasn't more clear about this: "The Open Group Base Specifications Issue 6" "IEEE Std 1003.1, 2004 Edition" Available here: http://pubs.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_09.html -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html