1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #ifndef _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
8 #define _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
9
10
11 #include <ngx_config.h>
12 #include <ngx_core.h>
13 #include <ngx_event.h>
14
15 typedef struct ngx_event_busy_lock_ctx_s ngx_event_busy_lock_ctx_t;
16
17 struct ngx_event_busy_lock_ctx_s {
18 ngx_event_t *event;
19 ngx_event_handler_pt handler;
20 void *data;
21 ngx_msec_t timer;
22
23 unsigned locked:1;
24 unsigned waiting:1;
25 unsigned cache_updated:1;
26
27 char *md5;
28 ngx_int_t slot;
29
30 ngx_event_busy_lock_ctx_t *next;
31 };
32
33
34 typedef struct {
35 u_char *md5_mask;
36 char *md5;
37 ngx_uint_t cacheable;
38
39 ngx_uint_t busy;
40 ngx_uint_t max_busy;
41
42 ngx_uint_t waiting;
43 ngx_uint_t max_waiting;
44
45 ngx_event_busy_lock_ctx_t *events;
46 ngx_event_busy_lock_ctx_t *last;
47
48 #if (NGX_THREADS)
49 ngx_mutex_t *mutex;
50 #endif
51 } ngx_event_busy_lock_t;
52
53
54 ngx_int_t ngx_event_busy_lock(ngx_event_busy_lock_t *bl,
55 ngx_event_busy_lock_ctx_t *ctx);
56 ngx_int_t ngx_event_busy_lock_cacheable(ngx_event_busy_lock_t *bl,
57 ngx_event_busy_lock_ctx_t *ctx);
58 void ngx_event_busy_unlock(ngx_event_busy_lock_t *bl,
59 ngx_event_busy_lock_ctx_t *ctx);
60 void ngx_event_busy_lock_cancel(ngx_event_busy_lock_t *bl,
61 ngx_event_busy_lock_ctx_t *ctx);
62
63
64 #endif /* _NGX_EVENT_BUSY_LOCK_H_INCLUDED_ */
65
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