1169695Skan/* Copyright (C) 2005 Free Software Foundation, Inc. 2169695Skan Contributed by Richard Henderson <rth@redhat.com>. 3169695Skan 4169695Skan This file is part of the GNU OpenMP Library (libgomp). 5169695Skan 6169695Skan Libgomp is free software; you can redistribute it and/or modify it 7169695Skan under the terms of the GNU Lesser General Public License as published by 8169695Skan the Free Software Foundation; either version 2.1 of the License, or 9169695Skan (at your option) any later version. 10169695Skan 11169695Skan Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY 12169695Skan WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 13169695Skan FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for 14169695Skan more details. 15169695Skan 16169695Skan You should have received a copy of the GNU Lesser General Public License 17169695Skan along with libgomp; see the file COPYING.LIB. If not, write to the 18169695Skan Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 19169695Skan MA 02110-1301, USA. */ 20169695Skan 21169695Skan/* As a special exception, if you link this library with other files, some 22169695Skan of which are compiled with GCC, to produce an executable, this library 23169695Skan does not by itself cause the resulting executable to be covered by the 24169695Skan GNU General Public License. This exception does not however invalidate 25169695Skan any other reasons why the executable file might be covered by the GNU 26169695Skan General Public License. */ 27169695Skan 28169695Skan/* This is the default PTHREADS implementation of the public OpenMP 29169695Skan locking primitives. 30169695Skan 31169695Skan Because OpenMP uses different entry points for normal and recursive 32169695Skan locks, and pthreads uses only one entry point, a system may be able 33169695Skan to do better and streamline the locking as well as reduce the size 34169695Skan of the types exported. */ 35169695Skan 36171831Skan/* We need Unix98 extensions to get recursive locks. On Tru64 UNIX V4.0F, 37171831Skan the declarations are available without _XOPEN_SOURCE, which actually 38171831Skan breaks compilation. */ 39171831Skan#ifndef __osf__ 40169695Skan#define _XOPEN_SOURCE 500 41171831Skan#endif 42169695Skan 43169695Skan#include "libgomp.h" 44169695Skan 45169695Skan 46169695Skanvoid 47169695Skanomp_init_lock (omp_lock_t *lock) 48169695Skan{ 49169695Skan pthread_mutex_init (lock, NULL); 50169695Skan} 51169695Skan 52169695Skanvoid 53169695Skanomp_destroy_lock (omp_lock_t *lock) 54169695Skan{ 55169695Skan pthread_mutex_destroy (lock); 56169695Skan} 57169695Skan 58169695Skanvoid 59169695Skanomp_set_lock (omp_lock_t *lock) 60169695Skan{ 61169695Skan pthread_mutex_lock (lock); 62169695Skan} 63169695Skan 64169695Skanvoid 65169695Skanomp_unset_lock (omp_lock_t *lock) 66169695Skan{ 67169695Skan pthread_mutex_unlock (lock); 68169695Skan} 69169695Skan 70169695Skanint 71169695Skanomp_test_lock (omp_lock_t *lock) 72169695Skan{ 73169695Skan return pthread_mutex_trylock (lock) == 0; 74169695Skan} 75169695Skan 76169695Skanvoid 77169695Skanomp_init_nest_lock (omp_nest_lock_t *lock) 78169695Skan{ 79169695Skan pthread_mutexattr_t attr; 80169695Skan 81169695Skan pthread_mutexattr_init (&attr); 82169695Skan pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); 83169695Skan pthread_mutex_init (&lock->lock, &attr); 84169695Skan lock->count = 0; 85169695Skan pthread_mutexattr_destroy (&attr); 86169695Skan} 87169695Skan 88169695Skanvoid 89169695Skanomp_destroy_nest_lock (omp_nest_lock_t *lock) 90169695Skan{ 91169695Skan pthread_mutex_destroy (&lock->lock); 92169695Skan} 93169695Skan 94169695Skanvoid 95169695Skanomp_set_nest_lock (omp_nest_lock_t *lock) 96169695Skan{ 97169695Skan pthread_mutex_lock (&lock->lock); 98169695Skan lock->count++; 99169695Skan} 100169695Skan 101169695Skanvoid 102169695Skanomp_unset_nest_lock (omp_nest_lock_t *lock) 103169695Skan{ 104169695Skan lock->count--; 105169695Skan pthread_mutex_unlock (&lock->lock); 106169695Skan} 107169695Skan 108169695Skanint 109169695Skanomp_test_nest_lock (omp_nest_lock_t *lock) 110169695Skan{ 111169695Skan if (pthread_mutex_trylock (&lock->lock) == 0) 112169695Skan return ++lock->count; 113169695Skan return 0; 114169695Skan} 115169695Skan 116169695Skanialias (omp_init_lock) 117169695Skanialias (omp_init_nest_lock) 118169695Skanialias (omp_destroy_lock) 119169695Skanialias (omp_destroy_nest_lock) 120169695Skanialias (omp_set_lock) 121169695Skanialias (omp_set_nest_lock) 122169695Skanialias (omp_unset_lock) 123169695Skanialias (omp_unset_nest_lock) 124169695Skanialias (omp_test_lock) 125169695Skanialias (omp_test_nest_lock) 126