1//===-- sanitizer_atomic.h --------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef SANITIZER_ATOMIC_H
15#define SANITIZER_ATOMIC_H
16
17#include "sanitizer_internal_defs.h"
18
19namespace __sanitizer {
20
21enum memory_order {
22  memory_order_relaxed = 1 << 0,
23  memory_order_consume = 1 << 1,
24  memory_order_acquire = 1 << 2,
25  memory_order_release = 1 << 3,
26  memory_order_acq_rel = 1 << 4,
27  memory_order_seq_cst = 1 << 5
28};
29
30struct atomic_uint8_t {
31  typedef u8 Type;
32  volatile Type val_dont_use;
33};
34
35struct atomic_uint16_t {
36  typedef u16 Type;
37  volatile Type val_dont_use;
38};
39
40struct atomic_sint32_t {
41  typedef s32 Type;
42  volatile Type val_dont_use;
43};
44
45struct atomic_uint32_t {
46  typedef u32 Type;
47  volatile Type val_dont_use;
48};
49
50struct atomic_uint64_t {
51  typedef u64 Type;
52  // On 32-bit platforms u64 is not necessary aligned on 8 bytes.
53  volatile ALIGNED(8) Type val_dont_use;
54};
55
56struct atomic_uintptr_t {
57  typedef uptr Type;
58  volatile Type val_dont_use;
59};
60
61}  // namespace __sanitizer
62
63#if defined(__clang__) || defined(__GNUC__)
64# include "sanitizer_atomic_clang.h"
65#elif defined(_MSC_VER)
66# include "sanitizer_atomic_msvc.h"
67#else
68# error "Unsupported compiler"
69#endif
70
71namespace __sanitizer {
72
73// Clutter-reducing helpers.
74
75template<typename T>
76INLINE typename T::Type atomic_load_relaxed(const volatile T *a) {
77  return atomic_load(a, memory_order_relaxed);
78}
79
80template<typename T>
81INLINE void atomic_store_relaxed(volatile T *a, typename T::Type v) {
82  atomic_store(a, v, memory_order_relaxed);
83}
84
85}  // namespace __sanitizer
86
87#endif  // SANITIZER_ATOMIC_H
88