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 implementation of a barrier synchronization mechanism 29169695Skan for libgomp. This type is private to the library. Note that we rely on 30169695Skan being able to adjust the barrier count while threads are blocked, so the 31169695Skan POSIX pthread_barrier_t won't work. */ 32169695Skan 33169695Skan#ifndef GOMP_BARRIER_H 34169695Skan#define GOMP_BARRIER_H 1 35169695Skan 36169695Skan#include <pthread.h> 37169695Skan 38169695Skantypedef struct 39169695Skan{ 40169695Skan gomp_mutex_t mutex1; 41169695Skan#ifndef HAVE_SYNC_BUILTINS 42169695Skan gomp_mutex_t mutex2; 43169695Skan#endif 44169695Skan gomp_sem_t sem1; 45169695Skan gomp_sem_t sem2; 46169695Skan unsigned total; 47169695Skan unsigned arrived; 48169695Skan} gomp_barrier_t; 49169695Skan 50169695Skanextern void gomp_barrier_init (gomp_barrier_t *, unsigned); 51169695Skanextern void gomp_barrier_reinit (gomp_barrier_t *, unsigned); 52169695Skanextern void gomp_barrier_destroy (gomp_barrier_t *); 53169695Skan 54169695Skanextern void gomp_barrier_wait (gomp_barrier_t *); 55169695Skanextern void gomp_barrier_wait_end (gomp_barrier_t *, bool); 56169695Skan 57169695Skanstatic inline bool gomp_barrier_wait_start (gomp_barrier_t *bar) 58169695Skan{ 59169695Skan gomp_mutex_lock (&bar->mutex1); 60169695Skan return ++bar->arrived == bar->total; 61169695Skan} 62169695Skan 63169695Skan#endif /* GOMP_BARRIER_H */ 64