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Relax C++11 atomic ops memory order to acquire-release

This commit is contained in:
Behdad Esfahbod 2018-07-16 15:44:58 +02:00
parent bda242409f
commit 804b59cf49
1 changed files with 3 additions and 3 deletions
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6
src/hb-atomic-private.hh
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@ -53,14 +53,14 @@
#include <atomic> #include <atomic>
typedef int hb_atomic_int_impl_t; typedef int hb_atomic_int_impl_t;
#define hb_atomic_int_impl_add(AI, V) (reinterpret_cast<std::atomic<int> *> (&AI)->fetch_add (V)) #define hb_atomic_int_impl_add(AI, V) (reinterpret_cast<std::atomic<int> *> (&AI)->fetch_add (V, std::memory_order_acq_rel))
#define hb_atomic_ptr_impl_get(P) (reinterpret_cast<std::atomic<void*> *> (P)->load ()) #define hb_atomic_ptr_impl_get(P) (reinterpret_cast<std::atomic<void*> *> (P)->load (std::memory_order_acquire))
static inline bool static inline bool
_hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N) _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
{ {
const void *O = O_; // Need lvalue const void *O = O_; // Need lvalue
return reinterpret_cast<std::atomic<const void*> *> (P)->compare_exchange_weak ((O), (N)); return reinterpret_cast<std::atomic<const void*> *> (P)->compare_exchange_weak ((O), (N), std::memory_order_acq_rel);
} }
#define hb_atomic_ptr_impl_cmpexch(P,O,N) (_hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N))) #define hb_atomic_ptr_impl_cmpexch(P,O,N) (_hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N)))