lib/builtins/atomic_flag_test_and_set_explicit.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

/*===-- atomic_flag_test_and_set_explicit.c ---------------------------------===
 *
 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 * See https://llvm.org/LICENSE.txt for license information.
 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 *
 *===------------------------------------------------------------------------===
 *
 * This file implements atomic_flag_test_and_set_explicit from C11's stdatomic.h
 *
 *===------------------------------------------------------------------------===
 */

#ifndef __has_include
#define __has_include(inc) 0
#endif

#if __has_include(<stdatomic.h>)

#include <stdatomic.h>
#undef atomic_flag_test_and_set_explicit
_Bool atomic_flag_test_and_set_explicit(volatile atomic_flag *object,
                                        memory_order order) {
  return __c11_atomic_exchange(&(object)->_Value, 1, order);
}

#endif