/* Copyright (C) 2005 Free Software Foundation, Inc.
|
/* Copyright (C) 2005 Free Software Foundation, Inc.
|
Contributed by Richard Henderson <rth@redhat.com>.
|
Contributed by Richard Henderson <rth@redhat.com>.
|
|
|
This file is part of the GNU OpenMP Library (libgomp).
|
This file is part of the GNU OpenMP Library (libgomp).
|
|
|
Libgomp is free software; you can redistribute it and/or modify it
|
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
|
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
|
the Free Software Foundation; either version 2.1 of the License, or
|
(at your option) any later version.
|
(at your option) any later version.
|
|
|
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
|
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
|
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
|
more details.
|
more details.
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
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
|
along with libgomp; see the file COPYING.LIB. If not, write to the
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
MA 02110-1301, USA. */
|
MA 02110-1301, USA. */
|
|
|
/* As a special exception, if you link this library with other files, some
|
/* 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
|
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
|
does not by itself cause the resulting executable to be covered by the
|
GNU General Public License. This exception does not however invalidate
|
GNU General Public License. This exception does not however invalidate
|
any other reasons why the executable file might be covered by the GNU
|
any other reasons why the executable file might be covered by the GNU
|
General Public License. */
|
General Public License. */
|
|
|
/* This is the default implementation of a barrier synchronization mechanism
|
/* This is the default implementation of a barrier synchronization mechanism
|
for libgomp. This type is private to the library. Note that we rely on
|
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
|
being able to adjust the barrier count while threads are blocked, so the
|
POSIX pthread_barrier_t won't work. */
|
POSIX pthread_barrier_t won't work. */
|
|
|
#ifndef GOMP_BARRIER_H
|
#ifndef GOMP_BARRIER_H
|
#define GOMP_BARRIER_H 1
|
#define GOMP_BARRIER_H 1
|
|
|
#include <pthread.h>
|
#include <pthread.h>
|
|
|
typedef struct
|
typedef struct
|
{
|
{
|
gomp_mutex_t mutex1;
|
gomp_mutex_t mutex1;
|
#ifndef HAVE_SYNC_BUILTINS
|
#ifndef HAVE_SYNC_BUILTINS
|
gomp_mutex_t mutex2;
|
gomp_mutex_t mutex2;
|
#endif
|
#endif
|
gomp_sem_t sem1;
|
gomp_sem_t sem1;
|
gomp_sem_t sem2;
|
gomp_sem_t sem2;
|
unsigned total;
|
unsigned total;
|
unsigned arrived;
|
unsigned arrived;
|
} gomp_barrier_t;
|
} gomp_barrier_t;
|
|
|
extern void gomp_barrier_init (gomp_barrier_t *, unsigned);
|
extern void gomp_barrier_init (gomp_barrier_t *, unsigned);
|
extern void gomp_barrier_reinit (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_destroy (gomp_barrier_t *);
|
|
|
extern void gomp_barrier_wait (gomp_barrier_t *);
|
extern void gomp_barrier_wait (gomp_barrier_t *);
|
extern void gomp_barrier_wait_end (gomp_barrier_t *, bool);
|
extern void gomp_barrier_wait_end (gomp_barrier_t *, bool);
|
|
|
static inline bool gomp_barrier_wait_start (gomp_barrier_t *bar)
|
static inline bool gomp_barrier_wait_start (gomp_barrier_t *bar)
|
{
|
{
|
gomp_mutex_lock (&bar->mutex1);
|
gomp_mutex_lock (&bar->mutex1);
|
return ++bar->arrived == bar->total;
|
return ++bar->arrived == bar->total;
|
}
|
}
|
|
|
#endif /* GOMP_BARRIER_H */
|
#endif /* GOMP_BARRIER_H */
|
|
|