1 //===-- sanitizer_atomic_msvc.h ---------------------------------*- C++ -*-===//
3 // This file is distributed under the University of Illinois Open Source
4 // License. See LICENSE.TXT for details.
6 //===----------------------------------------------------------------------===//
8 // This file is a part of ThreadSanitizer/AddressSanitizer runtime.
9 // Not intended for direct inclusion. Include sanitizer_atomic.h.
11 //===----------------------------------------------------------------------===//
13 #ifndef SANITIZER_ATOMIC_MSVC_H
14 #define SANITIZER_ATOMIC_MSVC_H
16 extern "C" void _ReadWriteBarrier();
17 #pragma intrinsic(_ReadWriteBarrier)
18 extern "C" void _mm_mfence();
19 #pragma intrinsic(_mm_mfence)
20 extern "C" void _mm_pause();
21 #pragma intrinsic(_mm_pause)
22 extern "C" long _InterlockedExchangeAdd( // NOLINT
23 long volatile * Addend
, long Value
); // NOLINT
24 #pragma intrinsic(_InterlockedExchangeAdd)
25 extern "C" void *InterlockedCompareExchangePointer(
26 void *volatile *Destination
,
27 void *Exchange
, void *Comparand
);
29 namespace __sanitizer
{
31 INLINE
void atomic_signal_fence(memory_order
) {
35 INLINE
void atomic_thread_fence(memory_order
) {
39 INLINE
void proc_yield(int cnt
) {
40 for (int i
= 0; i
< cnt
; i
++)
45 INLINE typename
T::Type
atomic_load(
46 const volatile T
*a
, memory_order mo
) {
47 DCHECK(mo
& (memory_order_relaxed
| memory_order_consume
48 | memory_order_acquire
| memory_order_seq_cst
));
49 DCHECK(!((uptr
)a
% sizeof(*a
)));
51 if (mo
== memory_order_relaxed
) {
54 atomic_signal_fence(memory_order_seq_cst
);
56 atomic_signal_fence(memory_order_seq_cst
);
62 INLINE
void atomic_store(volatile T
*a
, typename
T::Type v
, memory_order mo
) {
63 DCHECK(mo
& (memory_order_relaxed
| memory_order_release
64 | memory_order_seq_cst
));
65 DCHECK(!((uptr
)a
% sizeof(*a
)));
66 if (mo
== memory_order_relaxed
) {
69 atomic_signal_fence(memory_order_seq_cst
);
71 atomic_signal_fence(memory_order_seq_cst
);
73 if (mo
== memory_order_seq_cst
)
74 atomic_thread_fence(memory_order_seq_cst
);
77 INLINE u32
atomic_fetch_add(volatile atomic_uint32_t
*a
,
78 u32 v
, memory_order mo
) {
80 DCHECK(!((uptr
)a
% sizeof(*a
)));
81 return (u32
)_InterlockedExchangeAdd(
82 (volatile long*)&a
->val_dont_use
, (long)v
); // NOLINT
85 INLINE u8
atomic_exchange(volatile atomic_uint8_t
*a
,
86 u8 v
, memory_order mo
) {
88 DCHECK(!((uptr
)a
% sizeof(*a
)));
92 xchg
[eax
], cl
// NOLINT
98 INLINE u16
atomic_exchange(volatile atomic_uint16_t
*a
,
99 u16 v
, memory_order mo
) {
101 DCHECK(!((uptr
)a
% sizeof(*a
)));
105 xchg
[eax
], cx
// NOLINT
111 INLINE
bool atomic_compare_exchange_strong(volatile atomic_uintptr_t
*a
,
116 uptr prev
= (uptr
)InterlockedCompareExchangePointer(
117 (void*volatile*)&a
->val_dont_use
, (void*)xchg
, (void*)cmpv
);
125 INLINE
bool atomic_compare_exchange_weak(volatile T
*a
,
126 typename
T::Type
*cmp
,
127 typename
T::Type xchg
,
129 return atomic_compare_exchange_strong(a
, cmp
, xchg
, mo
);
132 } // namespace __sanitizer
134 #endif // SANITIZER_ATOMIC_CLANG_H