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Diffstat (limited to 'pthreads/src/pthread_rwlock_destroy.c')
| -rw-r--r-- | pthreads/src/pthread_rwlock_destroy.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/pthreads/src/pthread_rwlock_destroy.c b/pthreads/src/pthread_rwlock_destroy.c deleted file mode 100644 index 245a892..0000000 --- a/pthreads/src/pthread_rwlock_destroy.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * pthread_rwlock_destroy.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 <limits.h> - -#include "pthread.h" -#include "implement.h" - -int -pthread_rwlock_destroy (pthread_rwlock_t * rwlock) -{ - pthread_rwlock_t rwl; - int result = 0, result1 = 0, result2 = 0; - - if (rwlock == NULL || *rwlock == NULL) - { - return EINVAL; - } - - if (*rwlock != PTHREAD_RWLOCK_INITIALIZER) - { - rwl = *rwlock; - - if (rwl->nMagic != PTW32_RWLOCK_MAGIC) - { - return EINVAL; - } - - if ((result = pthread_mutex_lock (&(rwl->mtxExclusiveAccess))) != 0) - { - return result; - } - - if ((result = - pthread_mutex_lock (&(rwl->mtxSharedAccessCompleted))) != 0) - { - (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess)); - return result; - } - - /* - * Check whether any threads own/wait for the lock (wait for ex.access); - * report "BUSY" if so. - */ - if (rwl->nExclusiveAccessCount > 0 - || rwl->nSharedAccessCount > rwl->nCompletedSharedAccessCount) - { - result = pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted)); - result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess)); - result2 = EBUSY; - } - else - { - rwl->nMagic = 0; - - if ((result = - pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted))) != 0) - { - pthread_mutex_unlock (&rwl->mtxExclusiveAccess); - return result; - } - - if ((result = - pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) != 0) - { - return result; - } - - *rwlock = NULL; /* Invalidate rwlock before anything else */ - result = pthread_cond_destroy (&(rwl->cndSharedAccessCompleted)); - result1 = pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted)); - result2 = pthread_mutex_destroy (&(rwl->mtxExclusiveAccess)); - (void) free (rwl); - } - } - else - { - ptw32_mcs_local_node_t node; - /* - * See notes in ptw32_rwlock_check_need_init() above also. - */ - ptw32_mcs_lock_acquire(&ptw32_rwlock_test_init_lock, &node); - - /* - * Check again. - */ - if (*rwlock == PTHREAD_RWLOCK_INITIALIZER) - { - /* - * This is all we need to do to destroy a statically - * initialised rwlock that has not yet been used (initialised). - * If we get to here, another thread - * waiting to initialise this rwlock will get an EINVAL. - */ - *rwlock = NULL; - } - else - { - /* - * The rwlock has been initialised while we were waiting - * so assume it's in use. - */ - result = EBUSY; - } - - ptw32_mcs_lock_release(&node); - } - - return ((result != 0) ? result : ((result1 != 0) ? result1 : result2)); -} |