1//===-- sanitizer_atomic.h --------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef SANITIZER_ATOMIC_H
14#define SANITIZER_ATOMIC_H
15
16#include "sanitizer_internal_defs.h"
17
18namespace __sanitizer {
19
20enum memory_order {
21 memory_order_relaxed = 1 << 0,
22 memory_order_consume = 1 << 1,
23 memory_order_acquire = 1 << 2,
24 memory_order_release = 1 << 3,
25 memory_order_acq_rel = 1 << 4,
26 memory_order_seq_cst = 1 << 5
27};
28
29struct atomic_uint8_t {
30 typedef u8 Type;
31 volatile Type val_dont_use;
32};
33
34struct atomic_uint16_t {
35 typedef u16 Type;
36 volatile Type val_dont_use;
37};
38
39struct atomic_sint32_t {
40 typedef s32 Type;
41 volatile Type val_dont_use;
42};
43
44struct atomic_uint32_t {
45 typedef u32 Type;
46 volatile Type val_dont_use;
47};
48
49struct atomic_uint64_t {
50 typedef u64 Type;
51 // On 32-bit platforms u64 is not necessary aligned on 8 bytes.
52 volatile ALIGNED(8) Type val_dont_use;
53};
54
55struct atomic_uintptr_t {
56 typedef uptr Type;
57 volatile Type val_dont_use;
58};
59
60} // namespace __sanitizer
61
62#if defined(__clang__) || defined(__GNUC__)
63# include "sanitizer_atomic_clang.h"
64#elif defined(_MSC_VER)
65# include "sanitizer_atomic_msvc.h"
66#else
67# error "Unsupported compiler"
68#endif
69
70namespace __sanitizer {
71
72// Clutter-reducing helpers.
73
74template<typename T>
75inline typename T::Type atomic_load_relaxed(const volatile T *a) {
76 return atomic_load(a, memory_order_relaxed);
77}
78
79template<typename T>
80inline void atomic_store_relaxed(volatile T *a, typename T::Type v) {
81 atomic_store(a, v, memory_order_relaxed);
82}
83
84} // namespace __sanitizer
85
86#endif // SANITIZER_ATOMIC_H
87

source code of compiler-rt/lib/sanitizer_common/sanitizer_atomic.h