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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /nptl/pthread_mutex_setprioceiling.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'nptl/pthread_mutex_setprioceiling.c')
-rw-r--r--nptl/pthread_mutex_setprioceiling.c116
1 files changed, 0 insertions, 116 deletions
diff --git a/nptl/pthread_mutex_setprioceiling.c b/nptl/pthread_mutex_setprioceiling.c
deleted file mode 100644
index cd13d1c14c..0000000000
--- a/nptl/pthread_mutex_setprioceiling.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* Set current priority ceiling of pthread_mutex_t.
- Copyright (C) 2006 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
-
- 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 <stdbool.h>
-#include <errno.h>
-#include <pthreadP.h>
-
-
-int
-pthread_mutex_setprioceiling (mutex, prioceiling, old_ceiling)
- pthread_mutex_t *mutex;
- int prioceiling;
- int *old_ceiling;
-{
- /* The low bits of __kind aren't ever changed after pthread_mutex_init,
- so we don't need a lock yet. */
- if ((mutex->__data.__kind & PTHREAD_MUTEX_PRIO_PROTECT_NP) == 0)
- return EINVAL;
-
- if (__sched_fifo_min_prio == -1)
- __init_sched_fifo_prio ();
-
- if (__builtin_expect (prioceiling < __sched_fifo_min_prio, 0)
- || __builtin_expect (prioceiling > __sched_fifo_max_prio, 0)
- || __builtin_expect ((prioceiling
- & (PTHREAD_MUTEXATTR_PRIO_CEILING_MASK
- >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT))
- != prioceiling, 0))
- return EINVAL;
-
- /* Check whether we already hold the mutex. */
- bool locked = false;
- if (mutex->__data.__owner == THREAD_GETMEM (THREAD_SELF, tid))
- {
- if (mutex->__data.__kind == PTHREAD_MUTEX_PP_ERRORCHECK_NP)
- return EDEADLK;
-
- if (mutex->__data.__kind == PTHREAD_MUTEX_PP_RECURSIVE_NP)
- locked = true;
- }
-
- int oldval = mutex->__data.__lock;
- if (! locked)
- do
- {
- /* Need to lock the mutex, but without obeying the priority
- protect protocol. */
- int ceilval = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK);
-
- oldval = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
- ceilval | 1, ceilval);
- if (oldval == ceilval)
- break;
-
- do
- {
- oldval
- = atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
- ceilval | 2,
- ceilval | 1);
-
- if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
- break;
-
- if (oldval != ceilval)
- lll_futex_wait (&mutex->__data.__lock, ceilval | 2);
- }
- while (atomic_compare_and_exchange_val_acq (&mutex->__data.__lock,
- ceilval | 2, ceilval)
- != ceilval);
-
- if ((oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK) != ceilval)
- continue;
- }
- while (0);
-
- int oldprio = (oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK)
- >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
- if (locked)
- {
- int ret = __pthread_tpp_change_priority (oldprio, prioceiling);
- if (ret)
- return ret;
- }
-
- if (old_ceiling != NULL)
- *old_ceiling = oldprio;
-
- int newlock = 0;
- if (locked)
- newlock = (mutex->__data.__lock & ~PTHREAD_MUTEX_PRIO_CEILING_MASK);
- mutex->__data.__lock = newlock
- | (prioceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT);
- atomic_full_barrier ();
-
- lll_futex_wake (&mutex->__data.__lock, INT_MAX);
-
- return 0;
-}