From aaa4964a2277a1e265da4e7b91d5b1e3c3faa84e Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 17 Jan 2011 18:27:35 +0000 Subject: cvs update pthreads --- pthreads/pthread_rwlock_unlock.c | 187 +++++++++++++++++++-------------------- 1 file changed, 93 insertions(+), 94 deletions(-) (limited to 'pthreads/pthread_rwlock_unlock.c') diff --git a/pthreads/pthread_rwlock_unlock.c b/pthreads/pthread_rwlock_unlock.c index 776c996fe..4a9db569f 100644 --- a/pthreads/pthread_rwlock_unlock.c +++ b/pthreads/pthread_rwlock_unlock.c @@ -1,94 +1,93 @@ -/* - * pthread_rwlock_unlock.c - * - * Description: - * This translation unit implements read/write lock primitives. - * - * -------------------------------------------------------------------------- - * - * Pthreads-win32 - POSIX Threads Library for Win32 - * Copyright(C) 1998 John E. Bossom - * Copyright(C) 1999,2005 Pthreads-win32 contributors - * - * Contact Email: rpj@callisto.canberra.edu.au - * - * The current list of contributors is contained - * in the file CONTRIBUTORS included with the source - * code distribution. The list can also be seen at the - * following World Wide Web location: - * http://sources.redhat.com/pthreads-win32/contributors.html - * - * This 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 of the License, or (at your option) any later version. - * - * This 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 this library in the file COPYING.LIB; - * if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - -#include -#include - -#include "pthread.h" -#include "implement.h" - -int -pthread_rwlock_unlock (pthread_rwlock_t * rwlock) -{ - int result, result1; - pthread_rwlock_t rwl; - - if (rwlock == NULL || *rwlock == NULL) - { - return (EINVAL); - } - - if (*rwlock == PTHREAD_RWLOCK_INITIALIZER) - { - /* - * Assume any race condition here is harmless. - */ - return 0; - } - - rwl = *rwlock; - - if (rwl->nMagic != PTW32_RWLOCK_MAGIC) - { - return EINVAL; - } - - if (rwl->nExclusiveAccessCount == 0) - { - if ((result = - pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0) - { - return result; - } - - if (++rwl->nCompletedSharedAccessCount == 0) - { - result = pthread_cond_signal (&(rwl->cndSharedAccessCompleted)); - } - - result1 = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted)); - } - else - { - rwl->nExclusiveAccessCount--; - - result = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted)); - result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess)); - - } - - return ((result != 0) ? result : result1); -} +/* + * pthread_rwlock_unlock.c + * + * Description: + * This translation unit implements read/write lock primitives. + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2005 Pthreads-win32 contributors + * + * Contact Email: rpj@callisto.canberra.edu.au + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This 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 of the License, or (at your option) any later version. + * + * This 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 this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include + +#include "pthread.h" +#include "implement.h" + +int +pthread_rwlock_unlock (pthread_rwlock_t * rwlock) +{ + int result, result1; + pthread_rwlock_t rwl; + + if (rwlock == NULL || *rwlock == NULL) + { + return (EINVAL); + } + + if (*rwlock == PTHREAD_RWLOCK_INITIALIZER) + { + /* + * Assume any race condition here is harmless. + */ + return 0; + } + + rwl = *rwlock; + + if (rwl->nMagic != PTW32_RWLOCK_MAGIC) + { + return EINVAL; + } + + if (rwl->nExclusiveAccessCount == 0) + { + if ((result = + pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0) + { + return result; + } + + if (++rwl->nCompletedSharedAccessCount == 0) + { + result = pthread_cond_signal (&(rwl->cndSharedAccessCompleted)); + } + + result1 = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted)); + } + else + { + rwl->nExclusiveAccessCount--; + + result = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted)); + result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess)); + + } + + return ((result != 0) ? result : result1); +} -- cgit v1.2.3