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view src/event/ngx_event_timer.h @ 22:8b6db3bda591 NGINX_0_1_11

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nginx 0.1.11 *) Feature: the worker_priority directive. *) Change: both tcp_nopush and tcp_nodelay directives affect the transferred response. *) Bugfix: nginx did not call initgroups(). Thanks to Andrew Sitnikov and Andrei Nigmatulin. *) Change: now the ngx_http_autoindex_module shows the file size in the bytes. *) Bugfix: the ngx_http_autoindex_module returned the 500 error if the broken symlink was in a directory. *) Bugfix: the files bigger than 4G could not be transferred using sendfile. *) Bugfix: if the backend was resolved to several backends and there was an error while the response waiting then process may got caught in an endless loop. *) Bugfix: the worker process may exit with the "unknown cycle" message when the /dev/poll method was used. *) Bugfix: "close() channel failed" errors. *) Bugfix: the autodetection of the "nobody" and "nogroup" groups. *) Bugfix: the send_lowat directive did not work on Linux. *) Bugfix: the segmentation fault occurred if there was no events section in configuration. *) Bugfix: nginx could not be built on OpenBSD. *) Bugfix: the double slashes in "://" in the URI were converted to ":/".
author Igor Sysoev <http://sysoev.ru>
date Thu, 02 Dec 2004 00:00:00 +0300
parents 74b1868dd3cd
children 41ccba1aba45
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 */


#ifndef _NGX_EVENT_TIMER_H_INCLUDED_
#define _NGX_EVENT_TIMER_H_INCLUDED_


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


#define NGX_TIMER_INFINITE  -1
#define NGX_TIMER_ERROR     -2

/*
 * 32 bit timer key value resolution
 *
 * 1 msec - 24 days
 * 10 msec - 8 months
 * 50 msec - 3 years 5 months
 * 100 msec - 6 years 10 months
 */

#define NGX_TIMER_RESOLUTION  1


ngx_int_t ngx_event_timer_init(ngx_log_t *log);
ngx_msec_t ngx_event_find_timer(void);
void ngx_event_expire_timers(ngx_msec_t timer);


#if (NGX_THREADS)
extern ngx_mutex_t  *ngx_event_timer_mutex;
#endif


extern ngx_thread_volatile ngx_rbtree_t  *ngx_event_timer_rbtree;
extern ngx_rbtree_t                       ngx_event_timer_sentinel;


static ngx_inline void ngx_event_del_timer(ngx_event_t *ev)
{
    ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
                   "event timer del: %d: %d",
                    ngx_event_ident(ev->data), ev->rbtree_key);

    if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) {
        return;
    }

    ngx_rbtree_delete((ngx_rbtree_t **) &ngx_event_timer_rbtree,
                      &ngx_event_timer_sentinel,
                      (ngx_rbtree_t *) &ev->rbtree_key);

    ngx_mutex_unlock(ngx_event_timer_mutex);

#if (NGX_DEBUG)
    ev->rbtree_left = NULL;
    ev->rbtree_right = NULL;
    ev->rbtree_parent = NULL;
#endif

    ev->timer_set = 0;
}


static ngx_inline void ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
{
    ngx_int_t  key;

    key = (ngx_int_t)
              (ngx_elapsed_msec / NGX_TIMER_RESOLUTION * NGX_TIMER_RESOLUTION
                                              + timer) / NGX_TIMER_RESOLUTION;
#if 0
                             (ngx_elapsed_msec + timer) / NGX_TIMER_RESOLUTION;
#endif

    if (ev->timer_set) {

        /*
         * Use the previous timer value if a difference between them is less
         * then 100 milliseconds.  It allows to minimize the rbtree operations
         * for the fast connections.
         */

        if (abs(key - ev->rbtree_key) < 100 / NGX_TIMER_RESOLUTION) {
            ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
                           "event timer: %d, old: %i, new: %i",
                            ngx_event_ident(ev->data), ev->rbtree_key, key);
            return;
        }

        ngx_del_timer(ev);
    }

    ev->rbtree_key = key;

    ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
                   "event timer add: %d: %i",
                    ngx_event_ident(ev->data), ev->rbtree_key);

    if (ngx_mutex_lock(ngx_event_timer_mutex) == NGX_ERROR) {
        return;
    }

    ngx_rbtree_insert((ngx_rbtree_t **) &ngx_event_timer_rbtree,
                      &ngx_event_timer_sentinel,
                      (ngx_rbtree_t *) &ev->rbtree_key);

    ngx_mutex_unlock(ngx_event_timer_mutex);

    ev->timer_set = 1;
}


#endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */