+++ /dev/null
-/* Copyright (C) 2002, 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, see
- <http://www.gnu.org/licenses/>. */
-
-#include <errno.h>
-#include "pthreadP.h"
-#include <lowlevellock.h>
-
-
-int
-__pthread_rwlock_tryrdlock (
- pthread_rwlock_t *rwlock)
-{
- int result = EBUSY;
-
- lll_lock (rwlock->__data.__lock, rwlock->__data.__shared);
-
- if (rwlock->__data.__writer == 0
- && (rwlock->__data.__nr_writers_queued == 0
- || PTHREAD_RWLOCK_PREFER_READER_P (rwlock)))
- {
- if (__builtin_expect (++rwlock->__data.__nr_readers == 0, 0))
- {
- --rwlock->__data.__nr_readers;
- result = EAGAIN;
- }
- else
- result = 0;
- }
-
- lll_unlock (rwlock->__data.__lock, rwlock->__data.__shared);
-
- return result;
-}
-strong_alias (__pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock)