Date: Mon, 1 Nov 2004 12:11:33 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: Brian Fundakowski Feldman <green@freebsd.org> Cc: cvs-all@freebsd.org Subject: Re: cvs commit: src/lib/libpthread/thread thr_mutex.c Message-ID: <Pine.GSO.4.43.0411011210280.28151-100000@sea.ntplx.net> In-Reply-To: <20041101152916.GV93831@green.homeunix.org>
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On Mon, 1 Nov 2004, Brian Fundakowski Feldman wrote: > On Mon, Nov 01, 2004 at 09:31:10AM -0500, Daniel Eischen wrote: > > On Sun, 31 Oct 2004, Daniel Eischen wrote: > > > > > On Sun, 31 Oct 2004, Brian Feldman wrote: > > > > > > > green 2004-10-31 05:03:50 UTC > > > > > > > > FreeBSD src repository > > > > > > > > Modified files: > > > > lib/libpthread/thread thr_mutex.c > > > > Log: > > > > Make pthread_mutex_trylock(3) return EBUSY on failure, as all software > > > > packages expect and seems to be most correct according to the slightly- > > > > ambiguous standards. > > > > > > > > MFC after: 1 month > > > > Corroborated by: POSIX <http://tinyurl.com/4uvub>; > > > > Reviewed by: silence on threads@ > > > > > > I never saw this, and there has been a couple of long threads about > > > it. The current behavior was deemed correct especially since default > > > mutexes are error check mutexes. The rationale is that it provides a way > > > for a thread to tell if it owns the mutex if EDEADLK is returned. > > > > > > Please back out and sorry for not seeing a posting on -threads. > > > > I retract the backout request. I have response from Dave Butenhof > > over at the Austin Group mailing list, and EBUSY should be returned > > even for error check mutexes. He acknolwedged the spec was not > > clear and thought they had cleaned it up in that regard. So this > > is the correct fix :-) > > Could you please remind me what the procedure is for including > POSIX text within our manual pages? For pthreads it should be > trivial to use almost the same text, since we didn't originate > the interfaces ourselves, no? See the -standards folks, and probably Ruslan. From what I understand, we have approval to include POSIX man pages. -- Dan Eischen
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