Mercurial > hg > nginx
view src/event/ngx_event_posted.h @ 7345:fe767c99c2ad
Stream: avoid potential infinite loop at preread phase.
Previously the preread phase code ignored NGX_AGAIN value returned from
c->recv() and relied only on c->read->ready. But this flag is not reliable and
should only be checked for optimization purposes. For example, when using
SSL, c->read->ready may be set when no input is available. This can lead to
calling preread handler infinitely in a loop.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Wed, 29 Aug 2018 15:56:42 +0300 |
parents | 3d4730eada9c |
children | 9d2ad2fb4423 |
line wrap: on
line source
/* * 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_ */