diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-atomic.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-atomic.hh | 129 |
1 files changed, 11 insertions, 118 deletions
diff --git a/thirdparty/harfbuzz/src/hb-atomic.hh b/thirdparty/harfbuzz/src/hb-atomic.hh index b3fb296b4e..93265f655f 100644 --- a/thirdparty/harfbuzz/src/hb-atomic.hh +++ b/thirdparty/harfbuzz/src/hb-atomic.hh @@ -52,7 +52,7 @@ #elif !defined(HB_NO_MT) && defined(__ATOMIC_ACQUIRE) -/* C++11-style GCC primitives. */ +/* C++11-style GCC primitives. We prefer these as they don't require linking to libstdc++ / libc++. */ #define _hb_memory_barrier() __sync_synchronize () @@ -73,7 +73,8 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N) } #define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N)) -#elif !defined(HB_NO_MT) && __cplusplus >= 201103L + +#elif !defined(HB_NO_MT) /* C++11 atomics. */ @@ -101,117 +102,6 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N) #define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N)) -#elif !defined(HB_NO_MT) && defined(_WIN32) - -#include <windows.h> - -static inline void _hb_memory_barrier () -{ -#if !defined(MemoryBarrier) && !defined(__MINGW32_VERSION) - /* MinGW has a convoluted history of supporting MemoryBarrier. */ - LONG dummy = 0; - InterlockedExchange (&dummy, 1); -#else - MemoryBarrier (); -#endif -} -#define _hb_memory_barrier() _hb_memory_barrier () - -#define hb_atomic_int_impl_add(AI, V) InterlockedExchangeAdd ((LONG *) (AI), (V)) -static_assert ((sizeof (LONG) == sizeof (int)), ""); - -#define hb_atomic_ptr_impl_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((P), (N), (O)) == (O)) - - -#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) - -#define _hb_memory_barrier() __sync_synchronize () - -#define hb_atomic_int_impl_add(AI, V) __sync_fetch_and_add ((AI), (V)) - -#define hb_atomic_ptr_impl_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N)) - - -#elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS) - -#include <atomic.h> -#include <mbarrier.h> - -#define _hb_memory_r_barrier() __machine_r_barrier () -#define _hb_memory_w_barrier() __machine_w_barrier () -#define _hb_memory_barrier() __machine_rw_barrier () - -static inline int _hb_fetch_and_add (int *AI, int V) -{ - _hb_memory_w_barrier (); - int result = atomic_add_int_nv ((uint_t *) AI, V) - V; - _hb_memory_r_barrier (); - return result; -} -static inline bool _hb_compare_and_swap_ptr (void **P, void *O, void *N) -{ - _hb_memory_w_barrier (); - bool result = atomic_cas_ptr (P, O, N) == O; - _hb_memory_r_barrier (); - return result; -} - -#define hb_atomic_int_impl_add(AI, V) _hb_fetch_and_add ((AI), (V)) - -#define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_compare_and_swap_ptr ((P), (O), (N)) - - -#elif !defined(HB_NO_MT) && defined(__APPLE__) - -#include <libkern/OSAtomic.h> -#ifdef __MAC_OS_X_MIN_REQUIRED -#include <AvailabilityMacros.h> -#elif defined(__IPHONE_OS_MIN_REQUIRED) -#include <Availability.h> -#endif - -#define _hb_memory_barrier() OSMemoryBarrier () - -#define hb_atomic_int_impl_add(AI, V) (OSAtomicAdd32Barrier ((V), (AI)) - (V)) - -#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100) -#define hb_atomic_ptr_impl_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((O), (N), (P)) -#else -#if __ppc64__ || __x86_64__ || __aarch64__ -#define hb_atomic_ptr_impl_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P)) -#else -#define hb_atomic_ptr_impl_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P)) -#endif -#endif - - -#elif !defined(HB_NO_MT) && defined(_AIX) && (defined(__IBMCPP__) || defined(__ibmxl__)) - -#include <builtins.h> - -#define _hb_memory_barrier() __lwsync () - -static inline int _hb_fetch_and_add (int *AI, int V) -{ - _hb_memory_barrier (); - int result = __fetch_and_add (AI, V); - _hb_memory_barrier (); - return result; -} -static inline bool _hb_compare_and_swaplp (long *P, long O, long N) -{ - _hb_memory_barrier (); - bool result = __compare_and_swaplp (P, &O, N); - _hb_memory_barrier (); - return result; -} - -#define hb_atomic_int_impl_add(AI, V) _hb_fetch_and_add ((AI), (V)) - -#define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_compare_and_swaplp ((long *) (P), (long) (O), (long) (N)) -static_assert ((sizeof (long) == sizeof (void *)), ""); - - #elif defined(HB_NO_MT) #define hb_atomic_int_impl_add(AI, V) ((*(AI) += (V)) - (V)) @@ -259,9 +149,11 @@ inline void *hb_atomic_ptr_impl_get (void ** const P) { void *v = *P; _hb_memory #endif -#define HB_ATOMIC_INT_INIT(V) {V} struct hb_atomic_int_t { + hb_atomic_int_t () = default; + constexpr hb_atomic_int_t (int v) : v (v) {} + void set_relaxed (int v_) { hb_atomic_int_impl_set_relaxed (&v, v_); } void set (int v_) { hb_atomic_int_impl_set (&v, v_); } int get_relaxed () const { return hb_atomic_int_impl_get_relaxed (&v); } @@ -269,16 +161,17 @@ struct hb_atomic_int_t int inc () { return hb_atomic_int_impl_add (&v, 1); } int dec () { return hb_atomic_int_impl_add (&v, -1); } - int v; + int v = 0; }; - -#define HB_ATOMIC_PTR_INIT(V) {V} template <typename P> struct hb_atomic_ptr_t { typedef hb_remove_pointer<P> T; + hb_atomic_ptr_t () = default; + constexpr hb_atomic_ptr_t (T* v) : v (v) {} + void init (T* v_ = nullptr) { set_relaxed (v_); } void set_relaxed (T* v_) { hb_atomic_ptr_impl_set_relaxed (&v, v_); } T *get_relaxed () const { return (T *) hb_atomic_ptr_impl_get_relaxed (&v); } @@ -288,7 +181,7 @@ struct hb_atomic_ptr_t T * operator -> () const { return get (); } template <typename C> operator C * () const { return get (); } - T *v; + T *v = nullptr; }; |