1/*
2 * Copyright (c) 2015 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifndef _I386_ATOMIC_H_
30#define _I386_ATOMIC_H_
31
32#include <i386/smp.h>
33
34#if __SMP__
35
36#define memory_order_consume_smp memory_order_consume
37#define memory_order_acquire_smp memory_order_acquire
38#define memory_order_release_smp memory_order_release
39#define memory_order_acq_rel_smp memory_order_acq_rel
40#define memory_order_seq_cst_smp memory_order_seq_cst
41
42#else
43
44#define memory_order_consume_smp memory_order_relaxed
45#define memory_order_acquire_smp memory_order_relaxed
46#define memory_order_release_smp memory_order_relaxed
47#define memory_order_acq_rel_smp memory_order_relaxed
48#define memory_order_seq_cst_smp memory_order_relaxed
49
50#endif
51
52#ifdef ATOMIC_PRIVATE
53
54static inline boolean_t
55atomic_compare_exchange(uintptr_t *target, uintptr_t oldval, uintptr_t newval,
56 enum memory_order ord, boolean_t wait)
57{
58 (void)wait;
59 return __c11_atomic_compare_exchange_strong((_Atomic uintptr_t *)target, &oldval, newval, ord, memory_order_relaxed);
60}
61
62static inline boolean_t
63atomic_compare_exchange32(uint32_t *target, uint32_t oldval, uint32_t newval,
64 enum memory_order ord, boolean_t wait)
65{
66 (void)wait;
67 return __c11_atomic_compare_exchange_strong((_Atomic uint32_t *)target, &oldval, newval, ord, memory_order_relaxed);
68}
69
70#endif // ATOMIC_PRIVATE
71
72#endif // _I386_ATOMIC_H_
73