diff options
Diffstat (limited to 'app/nginx/src/os/win32/ngx_atomic.h')
-rw-r--r-- | app/nginx/src/os/win32/ngx_atomic.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/app/nginx/src/os/win32/ngx_atomic.h b/app/nginx/src/os/win32/ngx_atomic.h new file mode 100644 index 0000000..113f561 --- /dev/null +++ b/app/nginx/src/os/win32/ngx_atomic.h @@ -0,0 +1,69 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#ifndef _NGX_ATOMIC_H_INCLUDED_ +#define _NGX_ATOMIC_H_INCLUDED_ + + +#include <ngx_config.h> +#include <ngx_core.h> + + +#define NGX_HAVE_ATOMIC_OPS 1 + +typedef int32_t ngx_atomic_int_t; +typedef uint32_t ngx_atomic_uint_t; +typedef volatile ngx_atomic_uint_t ngx_atomic_t; +#define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) + + +#if defined( __WATCOMC__ ) || defined( __BORLANDC__ ) || defined(__GNUC__) \ + || ( _MSC_VER >= 1300 ) + +/* the new SDK headers */ + +#define ngx_atomic_cmp_set(lock, old, set) \ + ((ngx_atomic_uint_t) InterlockedCompareExchange((long *) lock, set, old) \ + == old) + +#else + +/* the old MS VC6.0SP2 SDK headers */ + +#define ngx_atomic_cmp_set(lock, old, set) \ + (InterlockedCompareExchange((void **) lock, (void *) set, (void *) old) \ + == (void *) old) + +#endif + + +#define ngx_atomic_fetch_add(p, add) InterlockedExchangeAdd((long *) p, add) + + +#define ngx_memory_barrier() + + +#if defined( __BORLANDC__ ) || ( __WATCOMC__ < 1230 ) + +/* + * Borland C++ 5.5 (tasm32) and Open Watcom C prior to 1.3 + * do not understand the "pause" instruction + */ + +#define ngx_cpu_pause() +#else +#define ngx_cpu_pause() __asm { pause } +#endif + + +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_unlock(lock) *(lock) = 0 + + +#endif /* _NGX_ATOMIC_H_INCLUDED_ */ |