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base: add atomic init, load and store macros

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Add new macros for atomic initialization, load and store, with ordering
semantics equivalent to <stdatomic.h>
This commit is contained in:
Luke Howard
2020-07-13 09:57:18 +10:00
parent cbb2ceb018
commit 9ba00949dd
1 changed files with 58 additions and 22 deletions
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44
lib/base/heimbase-atomics.h
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@@ -46,9 +46,15 @@
#include <stdatomic.h>
#define heim_base_atomic_init(t, v) atomic_init(t, v)
#define heim_base_atomic_load(x) atomic_load((x))
#define heim_base_atomic_store(t, v) atomic_store((t), (v))
#define heim_base_atomic(T) _Atomic(T)
#define heim_base_atomic_inc(x) (atomic_fetch_add((x), 1) + 1)
#define heim_base_atomic_dec(x) (atomic_fetch_sub((x), 1) - 1)
#define heim_base_atomic_type atomic_uint
#define heim_base_atomic_type heim_base_atomic(unsigned int)
#define heim_base_atomic_max UINT_MAX
#define heim_base_exchange_pointer(t,v) atomic_exchange((t), (v))
@@ -57,6 +63,8 @@
#elif defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH)
#define heim_base_atomic_barrier() __sync_synchronize()
#define heim_base_atomic_inc(x) __sync_add_and_fetch((x), 1)
#define heim_base_atomic_dec(x) __sync_sub_and_fetch((x), 1)
#define heim_base_atomic_type unsigned int
@@ -80,6 +88,8 @@
#include <sys/atomic.h>
#define heim_base_atomic_barrier() __machine_rw_barrier()
#define heim_base_atomic_inc(x) atomic_inc_uint_nv((volatile uint_t *)(x))
#define heim_base_atomic_dec(x) atomic_dec_uint_nv((volatile uint_t *)(x))
#define heim_base_atomic_type uint_t
@@ -93,6 +103,8 @@
#include <sys/atomic_op.h>
#define heim_base_atomic_barrier() __isync()
#define heim_base_atomic_inc(x) (fetch_and_add((atomic_p)(x)) + 1)
#define heim_base_atomic_dec(x) (fetch_and_add((atomic_p)(x)) - 1)
#define heim_base_atomic_type unsigned int
@@ -133,6 +145,8 @@ heim_base_exchange_64(uint64_t *p, uint64_t newval)
#elif defined(_WIN32)
#define heim_base_atomic_barrier() MemoryBarrier()
#define heim_base_atomic_inc(x) InterlockedIncrement(x)
#define heim_base_atomic_dec(x) InterlockedDecrement(x)
#define heim_base_atomic_type LONG
@@ -144,12 +158,13 @@ heim_base_exchange_64(uint64_t *p, uint64_t newval)
#else
#include "heim_threads.h"
#include <heim_threads.h>
#define HEIM_BASE_NEED_ATOMIC_MUTEX 1
extern HEIMDAL_MUTEX _heim_base_mutex;
#define heim_base_atomic_type unsigned int
#define heim_base_atomic_max UINT_MAX
static inline heim_base_atomic_type
heim_base_atomic_inc(heim_base_atomic_type *x)
@@ -171,8 +186,6 @@ heim_base_atomic_dec(heim_base_atomic_type *x)
return t;
}
#define heim_base_atomic_max UINT_MAX
static inline void *
heim_base_exchange_pointer(void *target, void *value)
{
@@ -208,6 +221,29 @@ heim_base_exchange_64(uint64_t *p, uint64_t newval)
#endif /* defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH) */
#ifndef heim_base_atomic
#define heim_base_atomic(T) T
#endif
#ifndef heim_base_atomic_barrier
#define heim_base_atomic_barrier()
#endif
#ifndef heim_base_atomic_load
#define heim_base_atomic_load(x) (heim_base_atomic_barrier(), *(x))
#endif
#ifndef heim_base_atomic_init
#define heim_base_atomic_init(t, v) do { (*(t) = (v)); } while (0)
#endif
#ifndef heim_base_atomic_store
#define heim_base_atomic_store(t, v) do { \
(*(t) = (v)); \
heim_base_atomic_barrier(); \
} while (0)
#endif
#if SIZEOF_TIME_T == 8
#define heim_base_exchange_time_t(t,v) heim_base_exchange_64((t), (v))
#elif SIZEOF_TIME_T == 4