mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* pthread_condattr_setclock. Generic version.
|
|
Copyright (C) 2002-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <pthread.h>
|
|
#include <pt-internal.h>
|
|
|
|
int
|
|
pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock)
|
|
{
|
|
/* Only a few clocks are allowed. CLOCK_REALTIME is always allowed.
|
|
CLOCK_MONOTONIC only if the kernel has the necessary support. */
|
|
if (clock == CLOCK_MONOTONIC)
|
|
{
|
|
/* Check whether the clock is available. */
|
|
static int avail;
|
|
|
|
if (avail == 0)
|
|
{
|
|
struct timespec ts;
|
|
int res;
|
|
|
|
res = clock_gettime (CLOCK_MONOTONIC, &ts);
|
|
avail = res < 0 ? -1 : 1;
|
|
}
|
|
|
|
if (avail < 0)
|
|
/* Not available. */
|
|
return EINVAL;
|
|
}
|
|
else if (clock != CLOCK_REALTIME)
|
|
return EINVAL;
|
|
|
|
attr->__clock = clock;
|
|
|
|
return 0;
|
|
}
|