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 | |
18 | namespace __sanitizer { |
19 | |
20 | enum 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 | |
29 | struct atomic_uint8_t { |
30 | typedef u8 Type; |
31 | volatile Type val_dont_use; |
32 | }; |
33 | |
34 | struct atomic_uint16_t { |
35 | typedef u16 Type; |
36 | volatile Type val_dont_use; |
37 | }; |
38 | |
39 | struct atomic_sint32_t { |
40 | typedef s32 Type; |
41 | volatile Type val_dont_use; |
42 | }; |
43 | |
44 | struct atomic_uint32_t { |
45 | typedef u32 Type; |
46 | volatile Type val_dont_use; |
47 | }; |
48 | |
49 | struct 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 | |
55 | struct 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 | |
70 | namespace __sanitizer { |
71 | |
72 | // Clutter-reducing helpers. |
73 | |
74 | template<typename T> |
75 | inline typename T::Type atomic_load_relaxed(const volatile T *a) { |
76 | return atomic_load(a, memory_order_relaxed); |
77 | } |
78 | |
79 | template<typename T> |
80 | inline 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 | |