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Add more atomic intrinsics

This commit is contained in:
Behdad Esfahbod 2018-09-26 16:37:18 -04:00
parent d183b33c1d
commit ec743fce2a
1 changed files with 18 additions and 3 deletions
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21
src/hb-atomic.hh
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@ -49,17 +49,21 @@
/* Defined externally, i.e. in config.h. */
#elif !defined(HB_NO_MT) && defined(__ATOMIC_CONSUME)
#elif !defined(HB_NO_MT) && defined(__ATOMIC_ACQUIRE)
/* C++11-style GCC primitives. */
#define _hb_memory_barrier() __sync_synchronize ()
#define hb_atomic_int_impl_add(AI, V) __atomic_fetch_add ((AI), (V), __ATOMIC_ACQ_REL)
#define hb_atomic_int_impl_set_relaxed(AI, V) __atomic_store_n ((AI), (V), __ATOMIC_RELAXED)
#define hb_atomic_int_impl_set(AI, V) __atomic_store_n ((AI), (V), __ATOMIC_RELEASE)
#define hb_atomic_int_impl_get_relaxed(AI) __atomic_load_n ((AI), __ATOMIC_RELAXED)
#define hb_atomic_int_impl_get(AI) __atomic_load_n ((AI), __ATOMIC_ACQUIRE)
#define hb_atomic_ptr_impl_set_relaxed(P, V) __atomic_store_n ((P), (V), __ATOMIC_RELAXED)
#define hb_atomic_ptr_impl_get_relaxed(P) __atomic_load_n ((P), __ATOMIC_RELAXED)
#define hb_atomic_ptr_impl_get(P) __atomic_load_n ((P), __ATOMIC_CONSUME)
#define hb_atomic_ptr_impl_get(P) __atomic_load_n ((P), __ATOMIC_ACQUIRE)
static inline bool
_hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
{
@ -74,13 +78,19 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
#include <atomic>
#define _hb_memory_barrier() std::atomic_thread_fence(std::memory_order_ack_rel)
#define _hb_memory_r_barrier() std::atomic_thread_fence(std::memory_order_acquire)
#define _hb_memory_w_barrier() std::atomic_thread_fence(std::memory_order_release)
#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_int_impl_set_relaxed(AI, V) (reinterpret_cast<std::atomic<int> *> (AI)->store ((V), std::memory_order_relaxed))
#define hb_atomic_int_impl_set_relaxed(AI, V) (reinterpret_cast<std::atomic<int> *> (AI)->store ((V), std::memory_order_release))
#define hb_atomic_int_impl_get_relaxed(AI) (reinterpret_cast<std::atomic<int> *> (AI)->load (std::memory_order_relaxed))
#define hb_atomic_int_impl_get_relaxed(AI) (reinterpret_cast<std::atomic<int> *> (AI)->load (std::memory_order_acquire))
#define hb_atomic_ptr_impl_set_relaxed(P, V) (reinterpret_cast<std::atomic<void*> *> (P)->store ((V), std::memory_order_relaxed))
#define hb_atomic_ptr_impl_get_relaxed(P) (reinterpret_cast<std::atomic<void*> *> (P)->load (std::memory_order_relaxed))
#define hb_atomic_ptr_impl_get(P) (reinterpret_cast<std::atomic<void*> *> (P)->load (std::memory_order_consume))
#define hb_atomic_ptr_impl_get(P) (reinterpret_cast<std::atomic<void*> *> (P)->load (std::memory_order_acquire))
static inline bool
_hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
{
@ -243,6 +253,9 @@ static_assert ((sizeof (long) == sizeof (void *)), "");
#ifndef hb_atomic_ptr_impl_get_relaxed
#define hb_atomic_ptr_impl_get_relaxed(P) (*(P))
#endif
#ifndef hb_atomic_int_impl_get
inline int hb_atomic_int_impl_get (int *AI) { int v = *AI; _hb_memory_r_barrier (); return v; }
#endif
#ifndef hb_atomic_ptr_impl_get
inline void *hb_atomic_ptr_impl_get (void **P) { void *v = *P; _hb_memory_r_barrier (); return v; }
#endif
@ -252,7 +265,9 @@ inline void *hb_atomic_ptr_impl_get (void **P) { void *v = *P; _hb_memory_r_barr
struct hb_atomic_int_t
{
inline void set_relaxed (int v_) const { hb_atomic_int_impl_set_relaxed (&v, v_); }
inline void set (int v_) const { hb_atomic_int_impl_set (&v, v_); }
inline int get_relaxed (void) const { return hb_atomic_int_impl_get_relaxed (&v); }
inline int get (void) const { return hb_atomic_int_impl_get (&v); }
inline int inc (void) { return hb_atomic_int_impl_add (&v, 1); }
inline int dec (void) { return hb_atomic_int_impl_add (&v, -1); }