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| author | Ed Schouten <ed@FreeBSD.org> | 2013-05-27 18:27:12 +0000 |
|---|---|---|
| committer | Ed Schouten <ed@FreeBSD.org> | 2013-05-27 18:27:12 +0000 |
| commit | 11023dc647fd8f41418da90d59db138400d0f334 (patch) | |
| tree | 50f0ab80515576749ef638dd0766b70a65904bfa /lib/sanitizer_common/sanitizer_atomic_msvc.h | |
| parent | 58aabf08b77d221489f10e274812ec60917c21a8 (diff) | |
| download | src-11023dc647fd8f41418da90d59db138400d0f334.tar.gz src-11023dc647fd8f41418da90d59db138400d0f334.zip | |
Import compiler-rt r182741.vendor/compiler-rt/compiler-rt-r182741
Notes
Notes:
svn path=/vendor/compiler-rt/dist/; revision=251034
svn path=/vendor/compiler-rt/compiler-rt-r182741/; revision=251036; tag=vendor/compiler-rt/compiler-rt-r182741
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); } |