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view src/event/ngx_event_busy_lock.h @ 470:6866b490272e NGINX_0_7_47

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nginx 0.7.47 *) Bugfix: nginx could not be built on FreeBSD 6 and early versions; the bug had appeared in 0.7.46. *) Bugfix: nginx could not be built on MacOSX; the bug had appeared in 0.7.46. *) Bugfix: if the "max_size" parameter was set, then the cache manager might purge a whole cache; the bug had appeared in 0.7.46. *) Change: a segmentation fault might occur in worker process, if the "proxy_cache"/"fastcgi_cache" and the "proxy_cache_valid"/ "fastcgi_cache_valid" were set on different levels; the bug had appeared in 0.7.46. *) Bugfix: a segmentation fault might occur in worker process, if a request was redirected to a proxied or FastCGI server via error_page or try_files; the bug had appeared in 0.7.44.
author Igor Sysoev <http://sysoev.ru>
date Wed, 01 Apr 2009 00:00:00 +0400
parents 10cc350ed8a1
children d0f7a625f27c
line wrap: on
line source


/*
 * 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                  cacheable;

    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_cacheable(ngx_event_busy_lock_t *bl,
    ngx_event_busy_lock_ctx_t *ctx);
void ngx_event_busy_unlock(ngx_event_busy_lock_t *bl,
    ngx_event_busy_lock_ctx_t *ctx);
void 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_ */