nginx work 进程初始化

最新推荐文章于 2024-01-07 01:36:02 发布

转载最新推荐文章于 2024-01-07 01:36:02 发布 · 86 阅读

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原文链接：https://my.oschina.net/u/2326611/blog/856469

2019独角兽企业重金招聘Python工程师标准>>>

nginx work 进程初始化

函数ngx_worker_process_cycle()

static void
ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data)
{
… …
  ngx_worker_process_init(cycle, worker);
… …

    for ( ;; ) {
        … …
        ngx_process_events_and_timers(cycle);
        … …
    }
}

函数ngx_worker_process_init()

static void
ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker){
… …
    if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,
                              ngx_channel_handler)
        == NGX_ERROR)
    {
        /* fatal */
        exit(2);
    }

}

函数ngx_add_channel_event()

ngx_int_t
ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_int_t event,
    ngx_event_handler_pt handler){
… …
    ev = (event == NGX_READ_EVENT) ? rev : wev;

    ev->handler = handler;

    if (ngx_add_conn && (ngx_event_flags & NGX_USE_EPOLL_EVENT) == 0) {
        if (ngx_add_conn(c) == NGX_ERROR) {
            ngx_free_connection(c);
            return NGX_ERROR;
        }

    } else {
        if (ngx_add_event(ev, event, 0) == NGX_ERROR) {
            ngx_free_connection(c);
            return NGX_ERROR;
        }
    }
}

函数ngx_channel_handler()

static void
ngx_channel_handler(ngx_event_t *ev)
{
    ngx_int_t          n;
    ngx_channel_t      ch;
    ngx_connection_t  *c;

    if (ev->timedout) {
        ev->timedout = 0;
        return;
    }

    c = ev->data;

    ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler");

    for ( ;; ) {

        n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log);

        ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n);
    }
}

其中函数ngx_read_channel()从socket s读取网络数据

ngx_int_t
ngx_read_channel(ngx_socket_t s, ngx_channel_t *ch, size_t size, ngx_log_t *log)
{
n = recvmsg(s, &msg, 0);
… …
}

注释：

rev->handler = ngx_channel_handler;

转载于:https://my.oschina.net/u/2326611/blog/856469