123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778 |
- /* Copyright (C) 2002, 2003 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 "pthreadP.h"
- #include <lowlevellock.h>
- int
- internal_function attribute_hidden
- __pthread_mutex_unlock_usercnt (mutex, decr)
- pthread_mutex_t *mutex;
- int decr;
- {
- switch (__builtin_expect (mutex->__data.__kind, PTHREAD_MUTEX_TIMED_NP))
- {
- case PTHREAD_MUTEX_RECURSIVE_NP:
- /* Recursive mutex. */
- if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid))
- return EPERM;
- if (--mutex->__data.__count != 0)
- /* We still hold the mutex. */
- return 0;
- break;
- case PTHREAD_MUTEX_ERRORCHECK_NP:
- /* Error checking mutex. */
- if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)
- || ! lll_mutex_islocked (mutex->__data.__lock))
- return EPERM;
- break;
- default:
- /* Correct code cannot set any other type. */
- case PTHREAD_MUTEX_TIMED_NP:
- case PTHREAD_MUTEX_ADAPTIVE_NP:
- /* Normal mutex. Nothing special to do. */
- break;
- }
- /* Always reset the owner field. */
- mutex->__data.__owner = 0;
- if (decr)
- /* One less user. */
- --mutex->__data.__nusers;
- /* Unlock. */
- lll_mutex_unlock (mutex->__data.__lock);
- return 0;
- }
- int
- __pthread_mutex_unlock (mutex)
- pthread_mutex_t *mutex;
- {
- return __pthread_mutex_unlock_usercnt (mutex, 1);
- }
- strong_alias (__pthread_mutex_unlock, pthread_mutex_unlock)
- strong_alias (__pthread_mutex_unlock, __pthread_mutex_unlock_internal)
|