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Diffstat (limited to 'pthreads/src/pthread_spin_destroy.c')
| -rw-r--r-- | pthreads/src/pthread_spin_destroy.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/pthreads/src/pthread_spin_destroy.c b/pthreads/src/pthread_spin_destroy.c deleted file mode 100644 index 786c4e3..0000000 --- a/pthreads/src/pthread_spin_destroy.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * pthread_spin_destroy.c - * - * Description: - * This translation unit implements spin 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 "pthread.h" -#include "implement.h" - - -int -pthread_spin_destroy (pthread_spinlock_t * lock) -{ - register pthread_spinlock_t s; - int result = 0; - - if (lock == NULL || *lock == NULL) - { - return EINVAL; - } - - if ((s = *lock) != PTHREAD_SPINLOCK_INITIALIZER) - { - if (s->interlock == PTW32_SPIN_USE_MUTEX) - { - result = pthread_mutex_destroy (&(s->u.mutex)); - } - else if ((PTW32_INTERLOCKED_LONG) PTW32_SPIN_UNLOCKED != - PTW32_INTERLOCKED_COMPARE_EXCHANGE_LONG ((PTW32_INTERLOCKED_LONGPTR) &s->interlock, - (PTW32_INTERLOCKED_LONG) PTW32_SPIN_INVALID, - (PTW32_INTERLOCKED_LONG) PTW32_SPIN_UNLOCKED)) - { - result = EINVAL; - } - - if (0 == result) - { - /* - * We are relying on the application to ensure that all other threads - * have finished with the spinlock before destroying it. - */ - *lock = NULL; - (void) free (s); - } - } - else - { - /* - * See notes in ptw32_spinlock_check_need_init() above also. - */ - ptw32_mcs_local_node_t node; - - ptw32_mcs_lock_acquire(&ptw32_spinlock_test_init_lock, &node); - - /* - * Check again. - */ - if (*lock == PTHREAD_SPINLOCK_INITIALIZER) - { - /* - * This is all we need to do to destroy a statically - * initialised spinlock that has not yet been used (initialised). - * If we get to here, another thread - * waiting to initialise this mutex will get an EINVAL. - */ - *lock = NULL; - } - else - { - /* - * The spinlock has been initialised while we were waiting - * so assume it's in use. - */ - result = EBUSY; - } - - ptw32_mcs_lock_release(&node); - } - - return (result); -} |