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/* Copyright (C) 2005-2022 Free Software Foundation, Inc.
Contributed by Richard Henderson <rth@redhat.com>.
This file is part of the GNU Offloading and Multi Processing Library
(libgomp).
Libgomp is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, 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 General Public License for
more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* This is the default PTHREADS implementation of the public OpenMP
locking primitives.
Because OpenMP uses different entry points for normal and recursive
locks, and pthreads uses only one entry point, a system may be able
to do better and streamline the locking as well as reduce the size
of the types exported. */
/* We need UNIX98/XPG5 extensions to get recursive locks. Request XPG6 since
Solaris requires this for C99 and later. */
#define _XOPEN_SOURCE 600
#include "libgomp.h"
#ifdef HAVE_BROKEN_POSIX_SEMAPHORES
void
gomp_init_lock_30 (omp_lock_t *lock)
{
pthread_mutex_init (lock, NULL);
}
void
gomp_destroy_lock_30 (omp_lock_t *lock)
{
pthread_mutex_destroy (lock);
}
void
gomp_set_lock_30 (omp_lock_t *lock)
{
pthread_mutex_lock (lock);
}
void
gomp_unset_lock_30 (omp_lock_t *lock)
{
pthread_mutex_unlock (lock);
}
int
gomp_test_lock_30 (omp_lock_t *lock)
{
return pthread_mutex_trylock (lock) == 0;
}
void
gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
{
pthread_mutex_init (&lock->lock, NULL);
lock->count = 0;
lock->owner = NULL;
}
void
gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
{
pthread_mutex_destroy (&lock->lock);
}
void
gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
{
void *me = gomp_icv (true);
if (lock->owner != me)
{
pthread_mutex_lock (&lock->lock);
lock->owner = me;
}
lock->count++;
}
void
gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
{
if (--lock->count == 0)
{
lock->owner = NULL;
pthread_mutex_unlock (&lock->lock);
}
}
int
gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
{
void *me = gomp_icv (true);
if (lock->owner != me)
{
if (pthread_mutex_trylock (&lock->lock) != 0)
return 0;
lock->owner = me;
}
return ++lock->count;
}
#else
void
gomp_init_lock_30 (omp_lock_t *lock)
{
sem_init (lock, 0, 1);
}
void
gomp_destroy_lock_30 (omp_lock_t *lock)
{
sem_destroy (lock);
}
void
gomp_set_lock_30 (omp_lock_t *lock)
{
while (sem_wait (lock) != 0)
;
}
void
gomp_unset_lock_30 (omp_lock_t *lock)
{
sem_post (lock);
}
int
gomp_test_lock_30 (omp_lock_t *lock)
{
return sem_trywait (lock) == 0;
}
void
gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
{
sem_init (&lock->lock, 0, 1);
lock->count = 0;
lock->owner = NULL;
}
void
gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
{
sem_destroy (&lock->lock);
}
void
gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
{
void *me = gomp_icv (true);
if (lock->owner != me)
{
while (sem_wait (&lock->lock) != 0)
;
lock->owner = me;
}
lock->count++;
}
void
gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
{
if (--lock->count == 0)
{
lock->owner = NULL;
sem_post (&lock->lock);
}
}
int
gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
{
void *me = gomp_icv (true);
if (lock->owner != me)
{
if (sem_trywait (&lock->lock) != 0)
return 0;
lock->owner = me;
}
return ++lock->count;
}
#endif
#ifdef LIBGOMP_GNU_SYMBOL_VERSIONING
void
gomp_init_lock_25 (omp_lock_25_t *lock)
{
pthread_mutex_init (lock, NULL);
}
void
gomp_destroy_lock_25 (omp_lock_25_t *lock)
{
pthread_mutex_destroy (lock);
}
void
gomp_set_lock_25 (omp_lock_25_t *lock)
{
pthread_mutex_lock (lock);
}
void
gomp_unset_lock_25 (omp_lock_25_t *lock)
{
pthread_mutex_unlock (lock);
}
int
gomp_test_lock_25 (omp_lock_25_t *lock)
{
return pthread_mutex_trylock (lock) == 0;
}
void
gomp_init_nest_lock_25 (omp_nest_lock_25_t *lock)
{
pthread_mutexattr_t attr;
pthread_mutexattr_init (&attr);
pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init (&lock->lock, &attr);
lock->count = 0;
pthread_mutexattr_destroy (&attr);
}
void
gomp_destroy_nest_lock_25 (omp_nest_lock_25_t *lock)
{
pthread_mutex_destroy (&lock->lock);
}
void
gomp_set_nest_lock_25 (omp_nest_lock_25_t *lock)
{
pthread_mutex_lock (&lock->lock);
lock->count++;
}
void
gomp_unset_nest_lock_25 (omp_nest_lock_25_t *lock)
{
lock->count--;
pthread_mutex_unlock (&lock->lock);
}
int
gomp_test_nest_lock_25 (omp_nest_lock_25_t *lock)
{
if (pthread_mutex_trylock (&lock->lock) == 0)
return ++lock->count;
return 0;
}
omp_lock_symver (omp_init_lock)
omp_lock_symver (omp_destroy_lock)
omp_lock_symver (omp_set_lock)
omp_lock_symver (omp_unset_lock)
omp_lock_symver (omp_test_lock)
omp_lock_symver (omp_init_nest_lock)
omp_lock_symver (omp_destroy_nest_lock)
omp_lock_symver (omp_set_nest_lock)
omp_lock_symver (omp_unset_nest_lock)
omp_lock_symver (omp_test_nest_lock)
#else
ialias (omp_init_lock)
ialias (omp_init_nest_lock)
ialias (omp_destroy_lock)
ialias (omp_destroy_nest_lock)
ialias (omp_set_lock)
ialias (omp_set_nest_lock)
ialias (omp_unset_lock)
ialias (omp_unset_nest_lock)
ialias (omp_test_lock)
ialias (omp_test_nest_lock)
#endif
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