diff options
Diffstat (limited to 'libpthread/sysdeps/generic/pt-mutex-timedlock.c')
| -rw-r--r-- | libpthread/sysdeps/generic/pt-mutex-timedlock.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/libpthread/sysdeps/generic/pt-mutex-timedlock.c b/libpthread/sysdeps/generic/pt-mutex-timedlock.c deleted file mode 100644 index 883e50af..00000000 --- a/libpthread/sysdeps/generic/pt-mutex-timedlock.c +++ /dev/null @@ -1,187 +0,0 @@ -/* Lock a mutex with a timeout. Generic version. - Copyright (C) 2000, 2002, 2005, 2008 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 Library General Public License as - published by the Free Software Foundation; either version 2 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 - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <pthread.h> -#include <assert.h> - -#include <pt-internal.h> - -#define LOSE do { * (int *) 0 = 0; } while (1) - -/* Try to lock MUTEX, block until *ABSTIME if it is already held. As - a GNU extension, if TIMESPEC is NULL then wait forever. */ -int -__pthread_mutex_timedlock_internal (struct __pthread_mutex *mutex, - const struct timespec *abstime) -{ - struct __pthread *self; - const struct __pthread_mutexattr *attr = mutex->attr; - - if (attr == __PTHREAD_ERRORCHECK_MUTEXATTR) - attr = &__pthread_errorcheck_mutexattr; - if (attr == __PTHREAD_RECURSIVE_MUTEXATTR) - attr = &__pthread_recursive_mutexattr; - - __pthread_spin_lock (&mutex->__lock); - if (__pthread_spin_trylock (&mutex->__held) == 0) - /* Successfully acquired the lock. */ - { -#ifdef ALWAYS_TRACK_MUTEX_OWNER -#ifndef NDEBUG - self = _pthread_self (); - if (self) - /* The main thread may take a lock before the library is fully - initialized, in particular, before the main thread has a - TCB. */ - { - assert (! mutex->owner); - mutex->owner = _pthread_self (); - } -#endif -#endif - - if (attr) - switch (attr->mutex_type) - { - case PTHREAD_MUTEX_NORMAL: - break; - - case PTHREAD_MUTEX_RECURSIVE: - mutex->locks = 1; - case PTHREAD_MUTEX_ERRORCHECK: - mutex->owner = _pthread_self (); - break; - - default: - LOSE; - } - - __pthread_spin_unlock (&mutex->__lock); - return 0; - } - - /* The lock is busy. */ - - self = _pthread_self (); - assert (self); - - if (! attr || attr->mutex_type == PTHREAD_MUTEX_NORMAL) - { -#if defined(ALWAYS_TRACK_MUTEX_OWNER) - assert (mutex->owner != self); -#endif - } - else - { - switch (attr->mutex_type) - { - case PTHREAD_MUTEX_ERRORCHECK: - if (mutex->owner == self) - { - __pthread_spin_unlock (&mutex->__lock); - return EDEADLK; - } - break; - - case PTHREAD_MUTEX_RECURSIVE: - if (mutex->owner == self) - { - mutex->locks ++; - __pthread_spin_unlock (&mutex->__lock); - return 0; - } - break; - - default: - LOSE; - } - } - -#if !defined(ALWAYS_TRACK_MUTEX_OWNER) - if (attr && attr->mutex_type != PTHREAD_MUTEX_NORMAL) -#endif - assert (mutex->owner); - - if (abstime && (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)) - return EINVAL; - - /* Add ourselves to the queue. */ - __pthread_enqueue (&mutex->__queue, self); - __pthread_spin_unlock (&mutex->__lock); - - /* Block the thread. */ - if (abstime) - { - error_t err; - - err = __pthread_timedblock (self, abstime); - if (err) - /* We timed out. We may need to disconnect ourself from the - waiter queue. - - FIXME: What do we do if we get a wakeup message before we - disconnect ourself? It may remain until the next time we - block. */ - { - assert (err == ETIMEDOUT); - - __pthread_spin_lock (&mutex->__lock); - if (self->prevp) - __pthread_dequeue (self); - __pthread_spin_unlock (&mutex->__lock); - - return err; - } - } - else - __pthread_block (self); - -#if !defined(ALWAYS_TRACK_MUTEX_OWNER) - if (attr && attr->mutex_type != PTHREAD_MUTEX_NORMAL) -#endif - { - assert (mutex->owner == self); - } - - if (attr) - switch (attr->mutex_type) - { - case PTHREAD_MUTEX_NORMAL: - break; - - case PTHREAD_MUTEX_RECURSIVE: - assert (mutex->locks == 0); - mutex->locks = 1; - case PTHREAD_MUTEX_ERRORCHECK: - mutex->owner = self; - break; - - default: - LOSE; - } - - return 0; -} - -int -pthread_mutex_timedlock (struct __pthread_mutex *mutex, - const struct timespec *abstime) -{ - return __pthread_mutex_timedlock_internal (mutex, abstime); -} |