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Diffstat (limited to 'libgomp/config/posix/bar.h')
| -rw-r--r-- | libgomp/config/posix/bar.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/libgomp/config/posix/bar.h b/libgomp/config/posix/bar.h new file mode 100644 index 00000000000..5275efa96a7 --- /dev/null +++ b/libgomp/config/posix/bar.h @@ -0,0 +1,63 @@ +/* Copyright (C) 2005 Free Software Foundation, Inc. + Contributed by Richard Henderson <rth@redhat.com>. + + This file is part of the GNU OpenMP Library (libgomp). + + Libgomp 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 2.1 of the License, or + (at your option) any later version. + + Libgomp 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 libgomp; see the file COPYING.LIB. If not, write to the + Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + MA 02110-1301, USA. */ + +/* As a special exception, if you link this library with other files, some + of which are compiled with GCC, to produce an executable, this library + does not by itself cause the resulting executable to be covered by the + GNU General Public License. This exception does not however invalidate + any other reasons why the executable file might be covered by the GNU + General Public License. */ + +/* This is the default implementation of a barrier synchronization mechanism + for libgomp. This type is private to the library. Note that we rely on + being able to adjust the barrier count while threads are blocked, so the + POSIX pthread_barrier_t won't work. */ + +#ifndef GOMP_BARRIER_H +#define GOMP_BARRIER_H 1 + +#include <pthread.h> + +typedef struct +{ + gomp_mutex_t mutex1; +#ifndef HAVE_SYNC_BUILTINS + gomp_mutex_t mutex2; +#endif + gomp_sem_t sem1; + gomp_sem_t sem2; + unsigned total; + unsigned arrived; +} gomp_barrier_t; + +extern void gomp_barrier_init (gomp_barrier_t *, unsigned); +extern void gomp_barrier_reinit (gomp_barrier_t *, unsigned); +extern void gomp_barrier_destroy (gomp_barrier_t *); + +extern void gomp_barrier_wait (gomp_barrier_t *); +extern void gomp_barrier_wait_end (gomp_barrier_t *, bool); + +static inline bool gomp_barrier_wait_start (gomp_barrier_t *bar) +{ + gomp_mutex_lock (&bar->mutex1); + return ++bar->arrived == bar->total; +} + +#endif /* GOMP_BARRIER_H */ |