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