mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-11-24 03:14:08 +08:00
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Copyright (C) 2005-2024 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 file contains helpers for the ATOMIC construct. */
|
|
|
|
#include "libgomp.h"
|
|
|
|
/* This mutex is used when atomic operations don't exist for the target
|
|
in the mode requested. The result is not globally atomic, but works so
|
|
long as all parallel references are within #pragma omp atomic directives.
|
|
According to responses received from omp@openmp.org, appears to be within
|
|
spec. Which makes sense, since that's how several other compilers
|
|
handle this situation as well. */
|
|
|
|
static gomp_mutex_t atomic_lock;
|
|
|
|
void
|
|
GOMP_atomic_start (void)
|
|
{
|
|
gomp_mutex_lock (&atomic_lock);
|
|
}
|
|
|
|
void
|
|
GOMP_atomic_end (void)
|
|
{
|
|
gomp_mutex_unlock (&atomic_lock);
|
|
}
|
|
|
|
#if !GOMP_MUTEX_INIT_0
|
|
static void __attribute__((constructor))
|
|
initialize_atomic (void)
|
|
{
|
|
gomp_mutex_init (&atomic_lock);
|
|
}
|
|
#endif
|