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Add a C11 atomics-based implementation of atomic.h API.

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This commit is contained in:
Chih-hung Hsieh
2014-12-05 17:42:41 -08:00
committed by Jason Evans
parent a18c2b1f15
commit 59cd80e6c6
4 changed files with 56 additions and 0 deletions
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28
include/jemalloc/internal/atomic.h
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@@ -72,6 +72,20 @@ atomic_sub_uint64(uint64_t *p, uint64_t x)
return (InterlockedExchangeAdd64(p, -((int64_t)x)) - x);
}
# elif (defined(JEMALLOC_C11ATOMICS))
JEMALLOC_INLINE uint64_t
atomic_add_uint64(uint64_t *p, uint64_t x)
{
volatile atomic_uint_least64_t *a = (volatile atomic_uint_least64_t *)p;
return (atomic_fetch_add(a, x) + x);
}
JEMALLOC_INLINE uint64_t
atomic_sub_uint64(uint64_t *p, uint64_t x)
{
volatile atomic_uint_least64_t *a = (volatile atomic_uint_least64_t *)p;
return (atomic_fetch_sub(a, x) - x);
}
# elif (defined(JEMALLOC_OSATOMIC))
JEMALLOC_INLINE uint64_t
atomic_add_uint64(uint64_t *p, uint64_t x)
@@ -187,6 +201,20 @@ atomic_sub_uint32(uint32_t *p, uint32_t x)
return (InterlockedExchangeAdd(p, -((int32_t)x)) - x);
}
# elif (defined(JEMALLOC_C11ATOMICS))
JEMALLOC_INLINE uint32_t
atomic_add_uint32(uint32_t *p, uint32_t x)
{
volatile atomic_uint_least32_t *a = (volatile atomic_uint_least32_t *)p;
return (atomic_fetch_add(a, x) + x);
}
JEMALLOC_INLINE uint32_t
atomic_sub_uint32(uint32_t *p, uint32_t x)
{
volatile atomic_uint_least32_t *a = (volatile atomic_uint_least32_t *)p;
return (atomic_fetch_sub(a, x) - x);
}
#elif (defined(JEMALLOC_OSATOMIC))
JEMALLOC_INLINE uint32_t
atomic_add_uint32(uint32_t *p, uint32_t x)

4
include/jemalloc/internal/jemalloc_internal.h.in
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@@ -127,6 +127,10 @@ static const bool config_ivsalloc =
#endif
;
#ifdef JEMALLOC_C11ATOMICS
#include <stdatomic.h>
#endif
#ifdef JEMALLOC_ATOMIC9
#include <machine/atomic.h>
#endif

3
include/jemalloc/internal/jemalloc_internal_defs.h.in
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@@ -22,6 +22,9 @@
*/
#undef CPU_SPINWAIT
/* Defined if C11 atomics are available. */
#undef JEMALLOC_C11ATOMICS
/* Defined if the equivalent of FreeBSD's atomic(9) functions are available. */
#undef JEMALLOC_ATOMIC9