Date: Mon, 24 May 2010 09:46:39 -0400 (EDT) From: Daniel Eischen <deischen@freebsd.org> To: Chris Vine <chris@cvine.freeserve.co.uk> Cc: freebsd-threads@freebsd.org Subject: Re: Monotonic clocks Message-ID: <Pine.GSO.4.64.1005240944500.5996@sea.ntplx.net> In-Reply-To: <20100524140513.6475cb2c@boulder.homenet> References: <20100524140513.6475cb2c@boulder.homenet>
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On Mon, 24 May 2010, Chris Vine wrote:
> Hi,
>
> I am the upstream maintainer of efax-gtk and I am told recent versions
> of the program will not compile on the FreeBSD port of debian, because
> FreeBSD does not appear to provide pthread_condattr_setclock() to set a
> monotonic clock on condition variables.
>
> The program configuration script calls up sysconf() to determine
> whether the POSIX advanced realtime option (_SC_MONOTONIC_CLOCK) is
> provided, and FreeBSD's sysconf() indicates that it is. Is anything
> else needed to enable monotonic clocks on BSD, or is sysconf()
> incorrectly advertising the implementation of monotonic clocks in BSD's
> libc?
What version of FreeBSD are you using? The code looks like it
tries to use CLOCK_MONOTONIC if specified. From
src/lib/libthr/thread/thr_init.c:
int
_pthread_condattr_setclock(pthread_condattr_t *attr, clockid_t clock_id)
{
if (attr == NULL || *attr == NULL)
return (EINVAL);
if (clock_id != CLOCK_REALTIME &&
clock_id != CLOCK_VIRTUAL &&
clock_id != CLOCK_PROF &&
clock_id != CLOCK_MONOTONIC) {
return (EINVAL);
}
(*attr)->c_clockid = clock_id;
return (0);
}
Are you getting an error from pthread_condattr_setclock() or is
it just not functioning correctly?
--
DE
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