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Diffstat (limited to 'pthreads/src/pthread_mutex_destroy.c')
| -rw-r--r-- | pthreads/src/pthread_mutex_destroy.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/pthreads/src/pthread_mutex_destroy.c b/pthreads/src/pthread_mutex_destroy.c deleted file mode 100644 index 7b8c9cd..0000000 --- a/pthreads/src/pthread_mutex_destroy.c +++ /dev/null @@ -1,148 +0,0 @@ -/* - * pthread_mutex_destroy.c - * - * Description: - * This translation unit implements mutual exclusion (mutex) 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 "pthread.h" -#include "implement.h" - - -int -pthread_mutex_destroy (pthread_mutex_t * mutex) -{ - int result = 0; - pthread_mutex_t mx; - - /* - * Let the system deal with invalid pointers. - */ - - /* - * Check to see if we have something to delete. - */ - if (*mutex < PTHREAD_ERRORCHECK_MUTEX_INITIALIZER) - { - mx = *mutex; - - result = pthread_mutex_trylock (&mx); - - /* - * If trylock succeeded and the mutex is not recursively locked it - * can be destroyed. - */ - if (0 == result || ENOTRECOVERABLE == result) - { - if (mx->kind != PTHREAD_MUTEX_RECURSIVE || 1 == mx->recursive_count) - { - /* - * FIXME!!! - * The mutex isn't held by another thread but we could still - * be too late invalidating the mutex below since another thread - * may already have entered mutex_lock and the check for a valid - * *mutex != NULL. - */ - *mutex = NULL; - - result = (0 == result)?pthread_mutex_unlock(&mx):0; - - if (0 == result) - { - if (mx->robustNode != NULL) - { - free(mx->robustNode); - } - if (!CloseHandle (mx->event)) - { - *mutex = mx; - result = EINVAL; - } - else - { - free (mx); - } - } - else - { - /* - * Restore the mutex before we return the error. - */ - *mutex = mx; - } - } - else /* mx->recursive_count > 1 */ - { - /* - * The mutex must be recursive and already locked by us (this thread). - */ - mx->recursive_count--; /* Undo effect of pthread_mutex_trylock() above */ - result = EBUSY; - } - } - } - else - { - ptw32_mcs_local_node_t node; - - /* - * See notes in ptw32_mutex_check_need_init() above also. - */ - - ptw32_mcs_lock_acquire(&ptw32_mutex_test_init_lock, &node); - - /* - * Check again. - */ - if (*mutex >= PTHREAD_ERRORCHECK_MUTEX_INITIALIZER) - { - /* - * This is all we need to do to destroy a statically - * initialised mutex that has not yet been used (initialised). - * If we get to here, another thread - * waiting to initialise this mutex will get an EINVAL. - */ - *mutex = NULL; - } - else - { - /* - * The mutex has been initialised while we were waiting - * so assume it's in use. - */ - result = EBUSY; - } - ptw32_mcs_lock_release(&node); - } - - return (result); -} |