1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
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_ */
|
