sanitizer_atomic_clang.h [plain text]
#ifndef SANITIZER_ATOMIC_CLANG_H
#define SANITIZER_ATOMIC_CLANG_H
#if defined(__i386__) || defined(__x86_64__)
# include "sanitizer_atomic_clang_x86.h"
#else
# include "sanitizer_atomic_clang_other.h"
#endif
namespace __sanitizer {
INLINE void atomic_signal_fence(memory_order) {
__asm__ __volatile__("" ::: "memory");
}
INLINE void atomic_thread_fence(memory_order) {
__sync_synchronize();
}
template<typename T>
INLINE typename T::Type atomic_fetch_add(volatile T *a,
typename T::Type v, memory_order mo) {
(void)mo;
DCHECK(!((uptr)a % sizeof(*a)));
return __sync_fetch_and_add(&a->val_dont_use, v);
}
template<typename T>
INLINE typename T::Type atomic_fetch_sub(volatile T *a,
typename T::Type v, memory_order mo) {
(void)mo;
DCHECK(!((uptr)a % sizeof(*a)));
return __sync_fetch_and_add(&a->val_dont_use, -v);
}
template<typename T>
INLINE typename T::Type atomic_exchange(volatile T *a,
typename T::Type v, memory_order mo) {
DCHECK(!((uptr)a % sizeof(*a)));
if (mo & (memory_order_release | memory_order_acq_rel | memory_order_seq_cst))
__sync_synchronize();
v = __sync_lock_test_and_set(&a->val_dont_use, v);
if (mo == memory_order_seq_cst)
__sync_synchronize();
return v;
}
template<typename T>
INLINE bool atomic_compare_exchange_strong(volatile T *a,
typename T::Type *cmp,
typename T::Type xchg,
memory_order mo) {
typedef typename T::Type Type;
Type cmpv = *cmp;
Type prev = __sync_val_compare_and_swap(&a->val_dont_use, cmpv, xchg);
if (prev == cmpv)
return true;
*cmp = prev;
return false;
}
template<typename T>
INLINE bool atomic_compare_exchange_weak(volatile T *a,
typename T::Type *cmp,
typename T::Type xchg,
memory_order mo) {
return atomic_compare_exchange_strong(a, cmp, xchg, mo);
}
}
#undef ATOMIC_ORDER
#endif // SANITIZER_ATOMIC_CLANG_H