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view src/event/ngx_event_busy_lock.h @ 555:7bd37aef1e7e release-0.2.6

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nginx-0.2.6-RELEASE import *) Change: while using load-balancing the time before the failed backend retry was decreased from 60 to 10 seconds. *) Change: the "proxy_pass_unparsed_uri" was canceled, the original URI now passed, if the URI part is omitted in "proxy_pass" directive. *) Feature: the "error_page" directive supports redirects and allows more flexible to change an error code. *) Change: the charset in the "Content-Type" header line now is ignored in proxied subrequests. *) Bugfix: if the URI was changed in the "if" block and request did not found new configuration, then the ngx_http_rewrite_module rules ran again. *) Bugfix: if the "set" directive set the ngx_http_geo_module variable in some configuration part, the this variable was not available in other configuration parts and the "using uninitialized variable" error was occurred; the bug had appeared in 0.2.2.
author Igor Sysoev <igor@sysoev.ru>
date Wed, 05 Oct 2005 14:46:21 +0000
parents 42d11f017717
children 9c2f3ed7a247
line wrap: on
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/*
 * Copyright (C) Igor Sysoev
 */


#ifndef _NGX_EVENT_BUSY_LOCK_H_INCLUDED_
#define _NGX_EVENT_BUSY_LOCK_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>

typedef struct ngx_event_busy_lock_ctx_s  ngx_event_busy_lock_ctx_t;

struct ngx_event_busy_lock_ctx_s {
    ngx_event_t                *event;
    ngx_event_handler_pt        handler;
    void                       *data;
    ngx_msec_t                  timer;

    unsigned                    locked:1;
    unsigned                    waiting:1;
    unsigned                    cache_updated:1;

    char                       *md5;
    ngx_int_t                   slot;

    ngx_event_busy_lock_ctx_t  *next;
};


typedef struct {
    u_char                     *md5_mask;
    char                       *md5;
    ngx_uint_t                  cachable;

    ngx_uint_t                  busy;
    ngx_uint_t                  max_busy;

    ngx_uint_t                  waiting;
    ngx_uint_t                  max_waiting;

    ngx_event_busy_lock_ctx_t  *events;
    ngx_event_busy_lock_ctx_t  *last;

#if (NGX_THREADS)
    ngx_mutex_t                *mutex;
#endif
} ngx_event_busy_lock_t;


ngx_int_t ngx_event_busy_lock(ngx_event_busy_lock_t *bl,
                              ngx_event_busy_lock_ctx_t *ctx);
ngx_int_t ngx_event_busy_lock_cachable(ngx_event_busy_lock_t *bl,
                                       ngx_event_busy_lock_ctx_t *ctx);
ngx_int_t ngx_event_busy_unlock(ngx_event_busy_lock_t *bl,
                                ngx_event_busy_lock_ctx_t *ctx);
ngx_int_t ngx_event_busy_lock_cancel(ngx_event_busy_lock_t *bl,
                                     ngx_event_busy_lock_ctx_t *ctx);


#endif /* _NGX_EVENT_BUSY_LOCK_H_INCLUDED_ */