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use MacOSX atomic(3) and barrier(3) operations

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This commit is contained in:
Igor Sysoev 2006-12-21 16:33:31 +00:00
parent d8d4f1b1fd
commit 28abaf70ff
1 changed files with 59 additions and 0 deletions
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59
src/os/unix/ngx_atomic.h
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@ -12,6 +12,62 @@
#include <ngx_core.h> #include <ngx_core.h>
#if (NGX_DARWIN)
/*
* use MacOSX atomic(3) and barrier(3) operations
* optimized at run time for UP and SMP
*/
#include <libkern/OSAtomic.h>
/* "bool" conflicts with perl's CORE/handy.h
* "true" and "false" conflict with nginx, and of course we can rename them,
* but we need to undef "bool" anyway
*/
#undef bool
#undef true
#undef false
#define NGX_HAVE_ATOMIC_OPS 1
#if (NGX_PTR_SIZE == 8)
typedef int64_t ngx_atomic_int_t;
typedef uint64_t ngx_atomic_uint_t;
#define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1
#define ngx_atomic_cmp_set(lock, old, new) \
OSAtomicCompareAndSwap64Barrier(old, new, (int64_t *) lock)
#define ngx_atomic_fetch_add(value, add) \
(OSAtomicAdd64(add, (int64_t *) value) - add)
#else
typedef int32_t ngx_atomic_int_t;
typedef uint32_t ngx_atomic_uint_t;
#define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1
#define ngx_atomic_cmp_set(lock, old, new) \
OSAtomicCompareAndSwap32Barrier(old, new, (int32_t *) lock)
#define ngx_atomic_fetch_add(value, add) \
(OSAtomicAdd32(add, (int32_t *) value) - add)
#endif
#define ngx_memory_barrier() OSMemoryBarrier()
#define ngx_cpu_pause()
typedef volatile ngx_atomic_uint_t ngx_atomic_t;
#else /* !(NGX_DARWIN) */
#if ( __i386__ || __i386 ) #if ( __i386__ || __i386 )
typedef int32_t ngx_atomic_int_t; typedef int32_t ngx_atomic_int_t;
@ -139,6 +195,8 @@ typedef volatile ngx_atomic_uint_t ngx_atomic_t;
#include "ngx_gcc_atomic_ppc.h" #include "ngx_gcc_atomic_ppc.h"
#endif
#endif #endif
@ -181,6 +239,7 @@ ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add)
#endif #endif
void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin); void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin);
#define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1))