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2003-05-01 Ulrich Drepper <drepper@redhat.com> * sysdeps/i386/tls.h: Define THREAD_ID. * sysdeps/ia64/tls.h: Likewise. * sysdeps/powerpc/tls.h: Likewise. * sysdeps/s390/tls.h: Likewise. * sysdeps/sh/tls.h: Likewise. * sysdeps/x86_64/tls.h: Likewise. * pthread_mutex_lock.c: Use THREAD_ID instead of THREAD_SELF to record ownership. * pthread_mutex_timedlock.c: Likewise. * pthread_mutex_trylock.c: Likewise. * pthread_mutex_unlock.c: Likewise. * pthread_rwlock_trywrlock.c: Likewise. * sysdeps/pthread/pthread_rwlocklock_rdlock.c: Likewise. * sysdeps/pthread/pthread_rwlock_timedrdlock.c: Likewise. * sysdeps/pthread/pthread_rwlock_timedwrlock.c: Likewise. * sysdeps/pthread/pthread_rwlock_wrlock.c: Likewise. * sysdeps/pthread/createthread.c (create_thread): Use CLONE_SYSVSEM flag.
89 lines
2.4 KiB
C
89 lines
2.4 KiB
C
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include "pthreadP.h"
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#include <lowlevellock.h>
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int
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pthread_mutex_timedlock (mutex, abstime)
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pthread_mutex_t *mutex;
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const struct timespec *abstime;
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{
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struct pthread *id = THREAD_ID;
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int result = 0;
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/* We must not check ABSTIME here. If the thread does not block
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abstime must not be checked for a valid value. */
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switch (mutex->__data.__kind)
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{
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/* Recursive mutex. */
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case PTHREAD_MUTEX_RECURSIVE_NP:
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/* Check whether we already hold the mutex. */
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if (mutex->__data.__owner == id)
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{
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/* Just bump the counter. */
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if (__builtin_expect (mutex->__data.__count + 1 == 0, 0))
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/* Overflow of the counter. */
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return EAGAIN;
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++mutex->__data.__count;
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goto out;
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}
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else
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{
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/* We have to get the mutex. */
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result = lll_mutex_timedlock (mutex->__data.__lock, abstime);
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if (result != 0)
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goto out;
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/* Only locked once so far. */
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mutex->__data.__count = 1;
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}
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break;
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/* Error checking mutex. */
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case PTHREAD_MUTEX_ERRORCHECK_NP:
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/* Check whether we already hold the mutex. */
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if (mutex->__data.__owner == id)
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return EDEADLK;
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/* FALLTHROUGH */
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default:
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/* Correct code cannot set any other type. */
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case PTHREAD_MUTEX_TIMED_NP:
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case PTHREAD_MUTEX_ADAPTIVE_NP:
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/* Normal mutex. */
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result = lll_mutex_timedlock (mutex->__data.__lock, abstime);
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break;
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}
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if (result == 0)
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/* Record the ownership. */
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mutex->__data.__owner = id;
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out:
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return result;
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}
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