libsanitizer/sanitizer_common/sanitizer_atomic.h

   1 //===-- sanitizer_atomic.h --------------------------------------*- C++ -*-===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of ThreadSanitizer/AddressSanitizer runtime.
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #ifndef SANITIZER_ATOMIC_H
  13 #define SANITIZER_ATOMIC_H
  14
  15 #include "sanitizer_internal_defs.h"
  16
  17 namespace __sanitizer {
  18
  19 enum memory_order {
  20   memory_order_relaxed = 1 << 0,
  21   memory_order_consume = 1 << 1,
  22   memory_order_acquire = 1 << 2,
  23   memory_order_release = 1 << 3,
  24   memory_order_acq_rel = 1 << 4,
  25   memory_order_seq_cst = 1 << 5
  26 };
  27
  28 struct atomic_uint8_t {
  29   typedef u8 Type;
  30   volatile Type val_dont_use;
  31 };
  32
  33 struct atomic_uint16_t {
  34   typedef u16 Type;
  35   volatile Type val_dont_use;
  36 };
  37
  38 struct atomic_uint32_t {
  39   typedef u32 Type;
  40   volatile Type val_dont_use;
  41 };
  42
  43 struct atomic_uint64_t {
  44   typedef u64 Type;
  45   // On 32-bit platforms u64 is not necessary aligned on 8 bytes.
  46   volatile ALIGNED(8) Type val_dont_use;
  47 };
  48
  49 struct atomic_uintptr_t {
  50   typedef uptr Type;
  51   volatile Type val_dont_use;
  52 };
  53
  54 }  // namespace __sanitizer
  55
  56 #if defined(__clang__) || defined(__GNUC__)
  57 # include "sanitizer_atomic_clang.h"
  58 #elif defined(_MSC_VER)
  59 # include "sanitizer_atomic_msvc.h"
  60 #else
  61 # error "Unsupported compiler"
  62 #endif
  63
  64 namespace __sanitizer {
  65
  66 // Clutter-reducing helpers.
  67
  68 template<typename T>
  69 INLINE typename T::Type atomic_load_relaxed(const volatile T *a) {
  70   return atomic_load(a, memory_order_relaxed);
  71 }
  72
  73 template<typename T>
  74 INLINE void atomic_store_relaxed(volatile T *a, typename T::Type v) {
  75   atomic_store(a, v, memory_order_relaxed);
  76 }
  77
  78 }  // namespace __sanitizer
  79
  80 #endif  // SANITIZER_ATOMIC_H