nginx-0.1.29-RELEASE import *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; the bug had appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.

/*
 * 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  (ngx_msec_t) -1
#define NGX_TIMER_ERROR     (ngx_msec_t) -2


/*
 * the 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

#define NGX_TIMER_LAZY_DELAY  300


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 NGX_TIMER_LAZY_DELAY milliseconds.  It allows to minimize
         * the rbtree operations for the fast connections.
         */

        if (abs(key - ev->rbtree_key)
                                 < NGX_TIMER_LAZY_DELAY / 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_ */