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view src/event/ngx_event_posted.h @ 5920:7420068c4d4b

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Resolver: fixed use-after-free memory access. In 954867a2f0a6, we switched to using resolver node as the timer event data, so make sure we do not free resolver node memory until the corresponding timer is deleted.
author Ruslan Ermilov <ru@nginx.com>
date Thu, 20 Nov 2014 15:24:40 +0300
parents 3f5f0ab59b35
children 3d4730eada9c
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/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_EVENT_POSTED_H_INCLUDED_
#define _NGX_EVENT_POSTED_H_INCLUDED_


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


#define ngx_post_event(ev, q)                                                 \
                                                                              \
    if (!ev->posted) {                                                        \
        ev->posted = 1;                                                       \
        ngx_queue_insert_tail(q, &ev->queue);                                 \
                                                                              \
        ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "post event %p", ev);  \
                                                                              \
    } else  {                                                                 \
        ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,                        \
                       "update posted event %p", ev);                         \
    }


#define ngx_delete_posted_event(ev)                                           \
                                                                              \
    ev->posted = 0;                                                           \
    ngx_queue_remove(&ev->queue);                                             \
                                                                              \
    ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0,                            \
                   "delete posted event %p", ev);



void ngx_event_process_posted(ngx_cycle_t *cycle, ngx_queue_t *posted);


extern ngx_queue_t  ngx_posted_accept_events;
extern ngx_queue_t  ngx_posted_events;


#endif /* _NGX_EVENT_POSTED_H_INCLUDED_ */