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Date: Thu, 11 Apr 2013 21:52:00 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Cc: fortran AT gcc DOT gnu DOT org
Subject: Re: Cygwin with clock_gettime and CLOCK_MONOTONIC - gives always 0
Message-ID: <20130411195200.GJ18333@calimero.vinschen.de>
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References: <5166A0B3 DOT 70801 AT net-b DOT de> <5166BCA1 DOT 5040204 AT net-b DOT de> <20130411134835 DOT GD18333 AT calimero DOT vinschen DOT de> <51670B6B DOT 3000503 AT net-b DOT de>
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User-Agent: Mutt/1.5.21 (2010-09-15)

On Apr 11 21:13, Tobias Burnus wrote:
> Corinna Vinschen wrote:
> >Works fine for me with the current Cygwin 1.7.17, and the upcoming
> >Cygwin 1.7.18:
> >     if (!clock_gettime (CLOCK_MONOTONIC, &tp))
> >       printf ("tv_sec = %ld, tv_nsec = %ld\n", tp.tv_sec, tp.tv_nsec);
> ...
> >   tv_sec = 0, tv_nsec = 29920
> 
> Where is actually the source code of the clock_gettime, which Cygwin
> uses? I thought that it was newlib. But looking at
> http://sourceware.org/cgi-bin/cvsweb.cgi/src/newlib/libc/sys/linux/clock_gettime.c?cvsroot=src
> the code should return -1 for "clock_gettime (CLOCK_MONOTONIC" as
> CLOCK_MONOTONIC (= 4) is not handled, only CLOCK_REALTIME (= 1,
> according to src/newlib/libc/include/time.h).
> 
> However, as both you and Angelo get a zero return value, I must look
> at the wrong file.

Yes, for Cygwin it's
http://cygwin.com/cgi-bin/cvsweb.cgi/src/winsup/cygwin/timer.cc?cvsroot=src


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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