mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
7726edc273
2003-06-07 Ulrich Drepper <drepper@redhat.com> * cleanup_routine.c: New file. * Versions (libpthread) [GLIBC_2.3.3]: Add __pthread_cleanup_routine. * sysdeps/pthread/pthread.h: Add support for fully exception-based cleanup handling. * Makefile (libpthread-routines): Add cleanup_routine. Add more CFLAGS variables to compile with exceptions. Add comments why which file needs unwind tables. (tests) [have-forced-unwind==yes]: Add tst-cancelx* and tst-cleanupx* tests. * tst-cancelx1.c: New file. * tst-cancelx2.c: New file. * tst-cancelx3.c: New file. * tst-cancelx4.c: New file. * tst-cancelx5.c: New file. * tst-cancelx6.c: New file. * tst-cancelx7.c: New file. * tst-cancelx8.c: New file. * tst-cancelx9.c: New file. * tst-cancelx10.c: New file. * tst-cancelx11.c: New file. * tst-cancelx12.c: New file. * tst-cancelx13.c: New file. * tst-cancelx14.c: New file. * tst-cancelx15.c: New file. * tst-cleanupx0.c: New file. * tst-cleanupx0.expect: New file. * tst-cleanupx1.c: New file. * tst-cleanupx2.c: New file. * tst-cleanupx3.c: New file. * tst-cleanup0.c: Make standard compliant. * tst-cleanup1.c: Likewise. * sysdeps/unix/sysv/linux/sem_timedwait.c: Add cancellation support. * sysdeps/unix/sysv/linux/sem_wait.c: Likewise. * sysdeps/unix/sysv/linux/i386/i486/sem_timedwait.S: Likewise. * sysdeps/unix/sysv/linux/i386/i486/sem_wait.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Likewise. * sysdeps/unix/sysv/linux/x86_64/sem_wait.S: Likewise. * sysdeps/i386/tcb-offsets.sym: Add RESULT, CANCELHANDLING, and CLEANUP_JMP_BUF. * sysdeps/x86_64/tcb-offsets.sym: Likewise. * tst-cancel12.c: New file. * tst-cancel13.c: New file. * tst-cancel14.c: New file. * tst-cancel15.c: New file. * Makefile (tests): Add tst-cancel12, tst-cancel13, tst-cancel14, and tst-cancel15. * tst-cancel1.c: Add some comments. * sysdeps/unix/sysv/linux/x86_64/sem_timedwait.S: Compute relative timeout correctly.
100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/* sem_timedwait -- wait on a semaphore. Generic futex-using version.
|
|
Copyright (C) 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Paul Mackerras <paulus@au.ibm.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 <errno.h>
|
|
#include <sysdep.h>
|
|
#include <lowlevellock.h>
|
|
#include <internaltypes.h>
|
|
#include <semaphore.h>
|
|
|
|
#include <pthreadP.h>
|
|
#include <shlib-compat.h>
|
|
|
|
|
|
int
|
|
sem_timedwait (sem_t *sem, const struct timespec *abstime)
|
|
{
|
|
/* First check for cancellation. */
|
|
CANCELLATION_P (THREAD_SELF);
|
|
|
|
int *futex = (int *) sem;
|
|
int val;
|
|
int err;
|
|
|
|
if (*futex > 0)
|
|
{
|
|
val = atomic_decrement_if_positive (futex);
|
|
if (val > 0)
|
|
return 0;
|
|
}
|
|
|
|
err = -EINVAL;
|
|
if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
|
|
goto error_return;
|
|
|
|
do
|
|
{
|
|
struct timeval tv;
|
|
struct timespec rt;
|
|
int sec, nsec;
|
|
|
|
/* Get the current time. */
|
|
__gettimeofday (&tv, NULL);
|
|
|
|
/* Compute relative timeout. */
|
|
sec = abstime->tv_sec - tv.tv_sec;
|
|
nsec = abstime->tv_nsec - tv.tv_usec * 1000;
|
|
if (nsec < 0)
|
|
{
|
|
nsec += 1000000000;
|
|
--sec;
|
|
}
|
|
|
|
/* Already timed out? */
|
|
err = -ETIMEDOUT;
|
|
if (sec < 0)
|
|
goto error_return;
|
|
|
|
/* Do wait. */
|
|
rt.tv_sec = sec;
|
|
rt.tv_nsec = nsec;
|
|
|
|
/* Enable asynchronous cancellation. Required by the standard. */
|
|
int oldtype = __pthread_enable_asynccancel ();
|
|
|
|
err = lll_futex_timed_wait (futex, 0, &rt);
|
|
|
|
/* Disable asynchronous cancellation. */
|
|
__pthread_disable_asynccancel (oldtype);
|
|
|
|
if (err != 0 && err != -EWOULDBLOCK)
|
|
goto error_return;
|
|
|
|
val = atomic_decrement_if_positive (futex);
|
|
}
|
|
while (val <= 0);
|
|
|
|
return 0;
|
|
|
|
error_return:
|
|
__set_errno (-err);
|
|
return -1;
|
|
}
|