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GCC 4.1 builtin atomic operations

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This commit is contained in:
Igor Sysoev 2009-11-25 17:34:35 +00:00
parent f215028477
commit 89d635fa5d
3 changed files with 46 additions and 9 deletions
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37
src/os/unix/ngx_atomic.h
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@ -60,10 +60,40 @@ typedef uint32_t ngx_atomic_uint_t;
typedef volatile ngx_atomic_uint_t ngx_atomic_t;
#else /* !(NGX_DARWIN) */
#elif (NGX_HAVE_GCC_ATOMIC)
/* GCC 4.1 builtin atomic operations */
#define NGX_HAVE_ATOMIC_OPS 1
typedef long ngx_atomic_int_t;
typedef unsigned long ngx_atomic_uint_t;
#if (NGX_PTR_SIZE == 8)
#define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1)
#else
#define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1)
#endif
typedef volatile ngx_atomic_uint_t ngx_atomic_t;
#if ( __i386__ || __i386 )
#define ngx_atomic_cmp_set(lock, old, set) \
__sync_bool_compare_and_swap(lock, old, set)
#define ngx_atomic_fetch_add(value, add) \
__sync_fetch_and_add(value, add)
#define ngx_memory_barrier() __sync_synchronize()
#if ( __i386__ || __i386 || __amd64__ || __amd64 )
#define ngx_cpu_pause() __asm__ ("pause")
#else
#define ngx_cpu_pause()
#endif
#elif ( __i386__ || __i386 )
typedef int32_t ngx_atomic_int_t;
typedef uint32_t ngx_atomic_uint_t;
@ -203,9 +233,6 @@ typedef volatile ngx_atomic_uint_t ngx_atomic_t;
#include "ngx_gcc_atomic_ppc.h"
#endif
#endif