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Add atomic.[ch].

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Add atomic.[ch], which should have been part of the previous commit.
This commit is contained in:
Jason Evans 2011-03-18 18:15:37 -07:00
parent 0657f12acd
commit 92d3284ff8
2 changed files with 79 additions and 0 deletions
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77
jemalloc/include/jemalloc/internal/atomic.h Normal file
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/******************************************************************************/
#ifdef JEMALLOC_H_TYPES
#endif /* JEMALLOC_H_TYPES */
/******************************************************************************/
#ifdef JEMALLOC_H_STRUCTS
#endif /* JEMALLOC_H_STRUCTS */
/******************************************************************************/
#ifdef JEMALLOC_H_EXTERNS
#define atomic_read_uint64(p) atomic_add_uint64(p, 0)
#define atomic_read_uint32(p) atomic_add_uint32(p, 0)
#if (LG_SIZEOF_PTR == 3)
# define atomic_read_z(p) atomic_add_uint64(p, 0)
# define atomic_add_z(p, x) atomic_add_uint64(p, x)
# define atomic_sub_z(p, x) atomic_sub_uint64(p, x)
#elif (LG_SIZEOF_PTR == 2)
# define atomic_read_z(p) atomic_add_uint32(p, 0)
# define atomic_add_z(p, x) atomic_add_uint32(p, x)
# define atomic_sub_z(p, x) atomic_sub_uint32(p, x)
#endif
#endif /* JEMALLOC_H_EXTERNS */
/******************************************************************************/
#ifdef JEMALLOC_H_INLINES
#ifndef JEMALLOC_ENABLE_INLINE
uint64_t atomic_add_uint64(uint64_t *p, uint64_t x);
uint64_t atomic_sub_uint64(uint64_t *p, uint64_t x);
uint32_t atomic_add_uint32(uint32_t *p, uint32_t x);
uint32_t atomic_sub_uint32(uint32_t *p, uint32_t x);
#endif
#if (defined(JEMALLOC_ENABLE_INLINE) || defined(JEMALLOC_ATOMIC_C_))
/* 64-bit operations. */
#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8
JEMALLOC_INLINE uint64_t
atomic_add_uint64(uint64_t *p, uint64_t x)
{
return (__sync_add_and_fetch(p, x));
}
JEMALLOC_INLINE uint64_t
atomic_sub_uint64(uint64_t *p, uint64_t x)
{
return (__sync_sub_and_fetch(p, x));
}
#else
# error "Missing implementation for 64-bit atomic operations"
#endif
/* 32-bit operations. */
#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
JEMALLOC_INLINE uint32_t
atomic_add_uint32(uint32_t *p, uint32_t x)
{
return (__sync_add_and_fetch(p, x));
}
JEMALLOC_INLINE uint32_t
atomic_sub_uint32(uint32_t *p, uint32_t x)
{
return (__sync_sub_and_fetch(p, x));
}
#else
# error "Missing implementation for 32-bit atomic operations"
#endif
#endif
#endif /* JEMALLOC_H_INLINES */
/******************************************************************************/

2
jemalloc/src/atomic.c Normal file
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#define JEMALLOC_ATOMIC_C_
#include "jemalloc/internal/jemalloc_internal.h"