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
19 namespace __sanitizer {
20
21 enum 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
30 struct atomic_uint8_t {
31 typedef u8 Type;
32 volatile Type val_dont_use;
33 };
34
35 struct atomic_uint16_t {
36 typedef u16 Type;
37 volatile Type val_dont_use;
38 };
39
40 struct atomic_uint32_t {
41 typedef u32 Type;
42 volatile Type val_dont_use;
43 };
44
45 struct atomic_uint64_t {
46 typedef u64 Type;
47 // On 32-bit platforms u64 is not necessary aligned on 8 bytes.
48 volatile ALIGNED(8) Type val_dont_use;
49 };
50
51 struct atomic_uintptr_t {
52 typedef uptr Type;
53 volatile Type val_dont_use;
54 };
55
56 } // namespace __sanitizer
57
58 #if defined(__clang__) || defined(__GNUC__)
59 # include "sanitizer_atomic_clang.h"
60 #elif defined(_MSC_VER)
61 # include "sanitizer_atomic_msvc.h"
62 #else
63 # error "Unsupported compiler"
64 #endif
65
66 namespace __sanitizer {
67
68 // Clutter-reducing helpers.
69
70 template<typename T>
atomic_load_relaxed(const volatile T * a)71 INLINE typename T::Type atomic_load_relaxed(const volatile T *a) {
72 return atomic_load(a, memory_order_relaxed);
73 }
74
75 template<typename T>
atomic_store_relaxed(volatile T * a,typename T::Type v)76 INLINE void atomic_store_relaxed(volatile T *a, typename T::Type v) {
77 atomic_store(a, v, memory_order_relaxed);
78 }
79
80 } // namespace __sanitizer
81
82 #endif // SANITIZER_ATOMIC_H
83