Mercurial > hg > nginx

annotate src/event/ngx_event_busy_lock.h @ 4233:aae172db7ac8

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Event pipe: reduced number of file buffers used. If possible we now just extend already present file buffer in p->out chain instead of keeping ngx_buf_t for each buffer we've flushed to disk. This saves about 120 bytes of memory per buffer flushed to disk, and resolves high CPU usage observed in edge cases (due to coalescing these buffers on send).
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 31 Oct 2011 09:54:55 +0000
parents 4c43e25d11ea
children d620f497c50f
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #ifndef _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
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8 #define _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_event.h>
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15 typedef struct ngx_event_busy_lock_ctx_s ngx_event_busy_lock_ctx_t;
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17 struct ngx_event_busy_lock_ctx_s {
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18 ngx_event_t *event;
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19 ngx_event_handler_pt handler;
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20 void *data;
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21 ngx_msec_t timer;
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23 unsigned locked:1;
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24 unsigned waiting:1;
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25 unsigned cache_updated:1;
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27 char *md5;
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28 ngx_int_t slot;
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30 ngx_event_busy_lock_ctx_t *next;
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31 };
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34 typedef struct {
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35 u_char *md5_mask;
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36 char *md5;
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37 ngx_uint_t cacheable;
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39 ngx_uint_t busy;
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40 ngx_uint_t max_busy;
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42 ngx_uint_t waiting;
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43 ngx_uint_t max_waiting;
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45 ngx_event_busy_lock_ctx_t *events;
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46 ngx_event_busy_lock_ctx_t *last;
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48 #if (NGX_THREADS)
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49 ngx_mutex_t *mutex;
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50 #endif
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51 } ngx_event_busy_lock_t;
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54 ngx_int_t ngx_event_busy_lock(ngx_event_busy_lock_t *bl,
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55 ngx_event_busy_lock_ctx_t *ctx);
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56 ngx_int_t ngx_event_busy_lock_cacheable(ngx_event_busy_lock_t *bl,
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57 ngx_event_busy_lock_ctx_t *ctx);
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58 void ngx_event_busy_unlock(ngx_event_busy_lock_t *bl,
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59 ngx_event_busy_lock_ctx_t *ctx);
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60 void ngx_event_busy_lock_cancel(ngx_event_busy_lock_t *bl,
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61 ngx_event_busy_lock_ctx_t *ctx);
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64 #endif /* _NGX_EVENT_BUSY_LOCK_H_INCLUDED_ */