diff options
Diffstat (limited to 'lib/sanitizer_common/sanitizer_atomic_msvc.h')
| -rw-r--r-- | lib/sanitizer_common/sanitizer_atomic_msvc.h | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/lib/sanitizer_common/sanitizer_atomic_msvc.h b/lib/sanitizer_common/sanitizer_atomic_msvc.h index 58a6a20ec9c5..dc22ef05e589 100644 --- a/lib/sanitizer_common/sanitizer_atomic_msvc.h +++ b/lib/sanitizer_common/sanitizer_atomic_msvc.h @@ -134,6 +134,27 @@ INLINE u16 atomic_exchange(volatile atomic_uint16_t *a, return v; } +INLINE bool atomic_compare_exchange_strong(volatile atomic_uint8_t *a, + u8 *cmp, + u8 xchgv, + memory_order mo) { + (void)mo; + DCHECK(!((uptr)a % sizeof(*a))); + u8 cmpv = *cmp; + u8 prev; + __asm { + mov al, cmpv + mov ecx, a + mov dl, xchgv + lock cmpxchg [ecx], dl + mov prev, al + } + if (prev == cmpv) + return true; + *cmp = prev; + return false; +} + INLINE bool atomic_compare_exchange_strong(volatile atomic_uintptr_t *a, uptr *cmp, uptr xchg, @@ -149,9 +170,9 @@ INLINE bool atomic_compare_exchange_strong(volatile atomic_uintptr_t *a, template<typename T> INLINE bool atomic_compare_exchange_weak(volatile T *a, - typename T::Type *cmp, - typename T::Type xchg, - memory_order mo) { + typename T::Type *cmp, + typename T::Type xchg, + memory_order mo) { return atomic_compare_exchange_strong(a, cmp, xchg, mo); } |