view src/event/ngx_event_posted.c @ 7617:f1720934c45b

SSL: reworked posted next events again. Previous change 1ce3f01a4355 incorrectly introduced processing of the ngx_posted_next_events queue at the end of operation, effectively making posted next events a nop, since at the end of an event loop iteration the queue is always empty. Correct approach is to move events to the ngx_posted_events queue at an iteration start, as it was done previously. Further, in some cases the c->read event might be already in the ngx_posted_events queue, and calling ngx_post_event() with the ngx_posted_next_events queue won't do anything. To make sure the event will be correctly placed into the ngx_posted_next_events queue we now check if it is already posted.
author Maxim Dounin <mdounin@mdounin.ru>
date Fri, 27 Dec 2019 19:43:01 +0300
parents 1ce3f01a4355
children
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


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


ngx_queue_t  ngx_posted_accept_events;
ngx_queue_t  ngx_posted_next_events;
ngx_queue_t  ngx_posted_events;


void
ngx_event_process_posted(ngx_cycle_t *cycle, ngx_queue_t *posted)
{
    ngx_queue_t  *q;
    ngx_event_t  *ev;

    while (!ngx_queue_empty(posted)) {

        q = ngx_queue_head(posted);
        ev = ngx_queue_data(q, ngx_event_t, queue);

        ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
                      "posted event %p", ev);

        ngx_delete_posted_event(ev);

        ev->handler(ev);
    }
}


void
ngx_event_move_posted_next(ngx_cycle_t *cycle)
{
    ngx_queue_t  *q;
    ngx_event_t  *ev;

    for (q = ngx_queue_head(&ngx_posted_next_events);
         q != ngx_queue_sentinel(&ngx_posted_next_events);
         q = ngx_queue_next(q))
    {
        ev = ngx_queue_data(q, ngx_event_t, queue);

        ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0,
                      "posted next event %p", ev);

        ev->ready = 1;
        ev->available = -1;
    }

    ngx_queue_add(&ngx_posted_events, &ngx_posted_next_events);
    ngx_queue_init(&ngx_posted_next_events);
}