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> 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> 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
