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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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5 */
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6
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7
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8 #ifndef _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
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9 #define _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
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10
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11
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_event.h>
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15
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16 typedef struct ngx_event_busy_lock_ctx_s ngx_event_busy_lock_ctx_t;
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17
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18 struct ngx_event_busy_lock_ctx_s {
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19 ngx_event_t *event;
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20 ngx_event_handler_pt handler;
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21 void *data;
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22 ngx_msec_t timer;
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23
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24 unsigned locked:1;
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25 unsigned waiting:1;
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26 unsigned cache_updated:1;
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27
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28 char *md5;
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29 ngx_int_t slot;
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30
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31 ngx_event_busy_lock_ctx_t *next;
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32 };
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33
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34
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35 typedef struct {
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36 u_char *md5_mask;
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37 char *md5;
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340
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38 ngx_uint_t cacheable;
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0
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39
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40 ngx_uint_t busy;
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41 ngx_uint_t max_busy;
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42
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43 ngx_uint_t waiting;
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44 ngx_uint_t max_waiting;
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45
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46 ngx_event_busy_lock_ctx_t *events;
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47 ngx_event_busy_lock_ctx_t *last;
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48
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49 #if (NGX_THREADS)
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50 ngx_mutex_t *mutex;
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51 #endif
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52 } ngx_event_busy_lock_t;
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53
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54
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55 ngx_int_t ngx_event_busy_lock(ngx_event_busy_lock_t *bl,
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112
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56 ngx_event_busy_lock_ctx_t *ctx);
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340
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57 ngx_int_t ngx_event_busy_lock_cacheable(ngx_event_busy_lock_t *bl,
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112
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58 ngx_event_busy_lock_ctx_t *ctx);
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59 void ngx_event_busy_unlock(ngx_event_busy_lock_t *bl,
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60 ngx_event_busy_lock_ctx_t *ctx);
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61 void ngx_event_busy_lock_cancel(ngx_event_busy_lock_t *bl,
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62 ngx_event_busy_lock_ctx_t *ctx);
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63
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64
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65 #endif /* _NGX_EVENT_BUSY_LOCK_H_INCLUDED_ */
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