glibc/nptl/pthread_condattr_setclock.c

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/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <errno.h>
#include <stdbool.h>
#include <time.h>
#include <sysdep.h>
#include "pthreadP.h"
#include <kernel-features.h>
int
pthread_condattr_setclock (attr, clock_id)
pthread_condattr_t *attr;
clockid_t clock_id;
{
/* Only a few clocks are allowed. CLOCK_REALTIME is always allowed.
CLOCK_MONOTONIC only if the kernel has the necessary support. */
if (clock_id == CLOCK_MONOTONIC)
{
#ifndef __ASSUME_POSIX_TIMERS
# ifdef __NR_clock_getres
/* Check whether the clock is available. */
static int avail;
if (avail == 0)
{
struct timespec ts;
INTERNAL_SYSCALL_DECL (err);
Update. 2003-07-31 Jakub Jelinek <jakub@redhat.com> * dlfcn/dlerror.c (once): New. (dlerror): Call __libc_once. (_dlerror_run): Remove once. 2003-07-31 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h (struct sigcontext): Sync with 2.5.7 and 2.5.73 kernel changes. 2003-07-31 Jakub Jelinek <jakub@redhat.com> * dlfcn/eval.c (funcall): Add noinline attribute to shut up warnings. * elf/rtld.c (dl_main): Cast ElfW(Addr) arguments with %Zx/%Zd formats to size_t. * elf/dl-lookup.c (_dl_debug_bindings): Likewise. * elf/tst-tls6.c (do_test): Use %zd format for l_tls_modid. * elf/tst-tls8.c (do_test): Use %zd format for modid1 and modid2. * gmon/tst-sprofil.c (main): Add parens to shut up warning. * iconv/tst-iconv3.c (main): Use %td instead of %zd for pointer difference argument. * stdio-common/tst-wc-printf.c (main): Cast arguments with %C format to wint_t. * stdlib/tst-limits.c (main): For WORD_BIT and LONG_BIT, use %d format and cast expected value to int. * sysdeps/generic/libc-start.c (STATIC): Add __attribute__((always_inline) if LIBC_START_MAIN is already defined. * sysdeps/powerpc/fpu/w_sqrt.c (a_nan, a_inf): Change from uint32_t to ieee_float_shape_type. (__sqrt): Avoid type punning. * sysdeps/powerpc/fpu/w_sqrtf.c (a_nan, a_inf): Change from uint32_t to ieee_float_shape_type. (__sqrtf): Avoid type punning. * sysdeps/s390/s390-32/dl-machine.h (elf_machine_rela): Don't define refsym if in dl-conflict.c. * sysdeps/s390/s390-64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/unix/sysv/linux/i386/semctl.c (union semun): Add __old_buf. (__new_semctl): Shut up warning. * sysdeps/unix/sysv/linux/semctl.c (union semun): Add __old_buf. (__new_semctl): Shut up warning. * sysdeps/unix/sysv/linux/shmctl.c (__new_shmctl): Wrap long lines. Change old into union of __old_shmid_ds and __old_shminfo structs. Adjust all users. * wcsmbs/wcsmbs-tst1.c (main): Cast arguments with %C format to wint_t. 2003-07-31 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/utimes.c (__utimes): Fix actime and modtime computation. * sysdeps/unix/sysv/linux/futimes.c (__futimes): Likewise. * sysdeps/posix/utimes.c (__utimes): Likewise.
2003-07-31 19:26:38 +00:00
int val;
val = INTERNAL_SYSCALL (clock_getres, err, 2, CLOCK_MONOTONIC, &ts);
avail = INTERNAL_SYSCALL_ERROR_P (val, err) ? -1 : 1;
}
if (avail < 0)
# endif
/* Not available. */
return EINVAL;
#endif
}
else if (clock_id != CLOCK_REALTIME)
/* If more clocks are allowed some day the storing of the clock ID
in the pthread_cond_t structure needs to be adjusted. */
return EINVAL;
/* Make sure the value fits in the bits we reserved. */
assert (clock_id < (1 << COND_CLOCK_BITS));
int *valuep = &((struct pthread_condattr *) attr)->value;
*valuep = (*valuep & ~(1 << (COND_CLOCK_BITS + 1)) & ~1) | (clock_id << 1);
return 0;
}