mirror of
https://sourceware.org/git/glibc.git
synced 2024-09-20 00:19:57 +00:00
5bd8a24966
* pthread_mutex_lock.c: Use it instead of PTHREAD_MUTEX_PSHARED when dealing with robust mutexes. * pthread_mutex_timedlock.c: Likewise. * pthread_mutex_trylock.c: Likewise. * pthread_mutex_unlock.c: Likewise. * sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c: Likewise. 2007-08-06 Jakub Jelinek <jakub@redhat.com> * pthreadP.h (PTHREAD_MUTEX_PSHARED_BIT): Define. (PTHREAD_MUTEX_TYPE): Mask __kind with 127. (PTHREAD_MUTEX_PSHARED): Define. * pthread_mutex_init.c (__pthread_mutex_init): Set PTHREAD_MUTEX_PSHARED_BIT for pshared or robust mutexes. * pthread_mutex_lock.c (LLL_MUTEX_LOCK): Take mutex as argument instead of its __data.__lock field, pass PTHREAD_MUTEX_PSHARED as second argument to lll_lock. (LLL_MUTEX_TRYLOCK): Take mutex as argument instead of its __data.__lock field. (LLL_ROBUST_MUTEX_LOCK): Take mutex as argument instead of its __data.__lock field, pass PTHREAD_MUTEX_PSHARED as second argument to lll_robust_lock. (__pthread_mutex_lock): Update LLL_MUTEX_LOCK, LLL_MUTEX_TRYLOCK, LLL_ROBUST_MUTEX_LOCK users, use PTHREAD_MUTEX_TYPE (mutex) instead of mutex->__data.__kind directly, pass PTHREAD_MUTEX_PSHARED (mutex) to lll_unlock and lll_futex_wait. * pthread_mutex_trylock.c (__pthread_mutex_trylock): Use PTHREAD_MUTEX_TYPE (mutex) instead of mutex->__data.__kind directly, pass PTHREAD_MUTEX_PSHARED (mutex) to lll_unlock. (pthread_mutex_timedlock): Pass PTHREAD_MUTEX_PSHARED (mutex) to lll_timedlock, lll_robust_timedlock, lll_unlock and lll_futex_timed_wait. Use PTHREAD_MUTEX_TYPE (mutex) instead of mutex->__data.__kind directly. * pthread_mutex_timedlock.c (pthread_mutex_timedlock): Pass PTHREAD_MUTEX_PSHARED (mutex) to lll_timedlock, lll_robust_timedlock, lll_unlock and lll_futex_timed_wait. Use PTHREAD_MUTEX_TYPE (mutex) instead of mutex->__data.__kind directly. * pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Pass PTHREAD_MUTEX_PSHARED (mutex) to lll_unlock, lll_robust_unlock and lll_futex_wake. * pthread_mutex_setprioceiling.c (pthread_mutex_setprioceiling): Pass PTHREAD_MUTEX_PSHARED (mutex) to lll_futex_wait and lll_futex_wake. Use PTHREAD_MUTEX_TYPE (mutex) instead of mutex->__data.__kind directly. * sysdeps/unix/sysv/linux/pthread_mutex_cond_lock.c (LLL_MUTEX_LOCK): Take mutex as argument instead of its __data.__lock field, pass PTHREAD_MUTEX_PSHARED as second argument to lll_cond_lock. (LLL_MUTEX_TRYLOCK): Take mutex as argument instead of its __data.__lock field. (LLL_ROBUST_MUTEX_LOCK): Take mutex as argument instead of its __data.__lock field, pass PTHREAD_MUTEX_PSHARED as second argument to lll_robust_cond_lock. * pthread_cond_broadcast.c (__pthread_cond_broadcast): Add pshared variable, pass it to lll_lock, lll_unlock, lll_futex_requeue and lll_futex_wake. Don't use lll_futex_requeue if dependent mutex has PTHREAD_MUTEX_PSHARED_BIT bit set in its __data.__kind. * pthread_cond_destroy.c (__pthread_cond_destroy): Add pshared variable, pass it to lll_lock, lll_unlock, lll_futex_wake and lll_futex_wait. * pthread_cond_signal.c (__pthread_cond_signal): Add pshared variable, pass it to lll_lock, lll_unlock, lll_futex_wake_unlock and lll_futex_wake. * pthread_cond_timedwait.c (__pthread_cond_wait): Add pshared variable, pass it to lll_lock, lll_unlock, lll_futex_timedwait and lll_futex_wake. * pthread_cond_wait.c (__condvar_cleanup, __pthread_cond_wait): Add pshared variable, pass it to lll_lock, lll_unlock, lll_futex_wait and lll_futex_wake. * sysdeps/unix/sysv/linux/alpha/lowlevellock.h (lll_futex_requeue, lll_futex_wake_unlock): Add private argument, use __lll_private_flag macro. * sysdeps/unix/sysv/linux/ia64/lowlevellock.h (lll_futex_requeue, lll_futex_wake_unlock): Likewise. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h (lll_futex_requeue): Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h (lll_futex_requeue, lll_futex_wake_unlock): Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h (lll_futex_requeue): Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h (lll_futex_requeue, lll_futex_wake_unlock): Likewise. (lll_futex_wake): Fix a typo. * sysdeps/unix/sysv/linux/pthread-pi-defines.sym (PS_BIT): Add. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S (__pthread_cond_broadcast): Pass LLL_PRIVATE to lll_* and or FUTEX_PRIVATE_FLAG into SYS_futex op if cv is process private. Don't use FUTEX_CMP_REQUEUE if dep_mutex is not process private. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S (__pthread_cond_signal): Pass LLL_PRIVATE to lll_* and or FUTEX_PRIVATE_FLAG into SYS_futex op if cv is process private. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S (__pthread_cond_timedwait): Likewise. * sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: (__condvar_cleanup, __pthread_cond_wait): Likewise.
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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 <shlib-compat.h>
|
|
#include "pthreadP.h"
|
|
|
|
|
|
int
|
|
__pthread_cond_destroy (cond)
|
|
pthread_cond_t *cond;
|
|
{
|
|
int pshared = (cond->__data.__mutex == (void *) ~0l)
|
|
? LLL_SHARED : LLL_PRIVATE;
|
|
|
|
/* Make sure we are alone. */
|
|
lll_lock (cond->__data.__lock, pshared);
|
|
|
|
if (cond->__data.__total_seq > cond->__data.__wakeup_seq)
|
|
{
|
|
/* If there are still some waiters which have not been
|
|
woken up, this is an application bug. */
|
|
lll_unlock (cond->__data.__lock, pshared);
|
|
return EBUSY;
|
|
}
|
|
|
|
/* Tell pthread_cond_*wait that this condvar is being destroyed. */
|
|
cond->__data.__total_seq = -1ULL;
|
|
|
|
/* If there are waiters which have been already signalled or
|
|
broadcasted, but still are using the pthread_cond_t structure,
|
|
pthread_cond_destroy needs to wait for them. */
|
|
unsigned int nwaiters = cond->__data.__nwaiters;
|
|
|
|
if (nwaiters >= (1 << COND_NWAITERS_SHIFT))
|
|
{
|
|
/* Wake everybody on the associated mutex in case there are
|
|
threads that have been requeued to it.
|
|
Without this, pthread_cond_destroy could block potentially
|
|
for a long time or forever, as it would depend on other
|
|
thread's using the mutex.
|
|
When all threads waiting on the mutex are woken up, pthread_cond_wait
|
|
only waits for threads to acquire and release the internal
|
|
condvar lock. */
|
|
if (cond->__data.__mutex != NULL
|
|
&& cond->__data.__mutex != (void *) ~0l)
|
|
{
|
|
pthread_mutex_t *mut = (pthread_mutex_t *) cond->__data.__mutex;
|
|
lll_futex_wake (&mut->__data.__lock, INT_MAX,
|
|
PTHREAD_MUTEX_PSHARED (mut));
|
|
}
|
|
|
|
do
|
|
{
|
|
lll_unlock (cond->__data.__lock, pshared);
|
|
|
|
lll_futex_wait (&cond->__data.__nwaiters, nwaiters, pshared);
|
|
|
|
lll_lock (cond->__data.__lock, pshared);
|
|
|
|
nwaiters = cond->__data.__nwaiters;
|
|
}
|
|
while (nwaiters >= (1 << COND_NWAITERS_SHIFT));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
versioned_symbol (libpthread, __pthread_cond_destroy,
|
|
pthread_cond_destroy, GLIBC_2_3_2);
|