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https://github.com/nginx/nginx.git
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91 lines
2.0 KiB
C
91 lines
2.0 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) Nginx, Inc.
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*/
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#ifndef _NGX_EVENT_TIMER_H_INCLUDED_
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#define _NGX_EVENT_TIMER_H_INCLUDED_
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#include <ngx_config.h>
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#include <ngx_core.h>
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#include <ngx_event.h>
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#define NGX_TIMER_INFINITE (ngx_msec_t) -1
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#define NGX_TIMER_LAZY_DELAY 300
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ngx_int_t ngx_event_timer_init(ngx_log_t *log);
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ngx_msec_t ngx_event_find_timer(void);
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void ngx_event_expire_timers(void);
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void ngx_event_cancel_timers(void);
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extern ngx_rbtree_t ngx_event_timer_rbtree;
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static ngx_inline void
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ngx_event_del_timer(ngx_event_t *ev)
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{
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ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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"event timer del: %d: %M",
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ngx_event_ident(ev->data), ev->timer.key);
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ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
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#if (NGX_DEBUG)
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ev->timer.left = NULL;
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ev->timer.right = NULL;
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ev->timer.parent = NULL;
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#endif
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ev->timer_set = 0;
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}
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static ngx_inline void
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ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
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{
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ngx_msec_t key;
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ngx_msec_int_t diff;
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key = ngx_current_msec + timer;
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if (ev->timer_set) {
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/*
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* Use a previous timer value if difference between it and a new
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* value is less than NGX_TIMER_LAZY_DELAY milliseconds: this allows
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* to minimize the rbtree operations for fast connections.
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*/
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diff = (ngx_msec_int_t) (key - ev->timer.key);
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if (ngx_abs(diff) < NGX_TIMER_LAZY_DELAY) {
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ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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"event timer: %d, old: %M, new: %M",
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ngx_event_ident(ev->data), ev->timer.key, key);
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return;
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}
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ngx_del_timer(ev);
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}
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ev->timer.key = key;
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ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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"event timer add: %d: %M:%M",
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ngx_event_ident(ev->data), timer, ev->timer.key);
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ngx_rbtree_insert(&ngx_event_timer_rbtree, &ev->timer);
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ev->timer_set = 1;
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}
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#endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */
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