| /* Copyright (C) 2002-2014 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, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include "pthreadP.h" |
| #include <lowlevellock.h> |
| |
| |
| int |
| __pthread_rwlock_trywrlock (pthread_rwlock_t *rwlock) |
| { |
| int result = EBUSY; |
| |
| lll_lock (rwlock->__data.__lock, rwlock->__data.__shared); |
| |
| if (rwlock->__data.__writer == 0 && rwlock->__data.__nr_readers == 0) |
| { |
| rwlock->__data.__writer = THREAD_GETMEM (THREAD_SELF, tid); |
| result = 0; |
| } |
| |
| lll_unlock (rwlock->__data.__lock, rwlock->__data.__shared); |
| |
| return result; |
| } |
| strong_alias (__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock) |
