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      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_sint32_t {
     41   typedef s32 Type;
     42   volatile Type val_dont_use;
     43 };
     44 
     45 struct atomic_uint32_t {
     46   typedef u32 Type;
     47   volatile Type val_dont_use;
     48 };
     49 
     50 struct 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 
     56 struct 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 
     71 namespace __sanitizer {
     72 
     73 // Clutter-reducing helpers.
     74 
     75 template<typename T>
     76 INLINE typename T::Type atomic_load_relaxed(const volatile T *a) {
     77   return atomic_load(a, memory_order_relaxed);
     78 }
     79 
     80 template<typename T>
     81 INLINE 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