diff options
Diffstat (limited to 'app/nginx/src/event/ngx_event_timer.h')
-rw-r--r-- | app/nginx/src/event/ngx_event_timer.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/app/nginx/src/event/ngx_event_timer.h b/app/nginx/src/event/ngx_event_timer.h new file mode 100644 index 0000000..be81b15 --- /dev/null +++ b/app/nginx/src/event/ngx_event_timer.h @@ -0,0 +1,90 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#ifndef _NGX_EVENT_TIMER_H_INCLUDED_ +#define _NGX_EVENT_TIMER_H_INCLUDED_ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> + + +#define NGX_TIMER_INFINITE (ngx_msec_t) -1 + +#define NGX_TIMER_LAZY_DELAY 300 + + +ngx_int_t ngx_event_timer_init(ngx_log_t *log); +ngx_msec_t ngx_event_find_timer(void); +void ngx_event_expire_timers(void); +ngx_int_t ngx_event_no_timers_left(void); + + +extern ngx_rbtree_t ngx_event_timer_rbtree; + + +static ngx_inline void +ngx_event_del_timer(ngx_event_t *ev) +{ + ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, + "event timer del: %d: %M", + ngx_event_ident(ev->data), ev->timer.key); + + ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer); + +#if (NGX_DEBUG) + ev->timer.left = NULL; + ev->timer.right = NULL; + ev->timer.parent = NULL; +#endif + + ev->timer_set = 0; +} + + +static ngx_inline void +ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer) +{ + ngx_msec_t key; + ngx_msec_int_t diff; + + key = ngx_current_msec + timer; + + if (ev->timer_set) { + + /* + * Use a previous timer value if difference between it and a new + * value is less than NGX_TIMER_LAZY_DELAY milliseconds: this allows + * to minimize the rbtree operations for fast connections. + */ + + diff = (ngx_msec_int_t) (key - ev->timer.key); + + if (ngx_abs(diff) < NGX_TIMER_LAZY_DELAY) { + ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, + "event timer: %d, old: %M, new: %M", + ngx_event_ident(ev->data), ev->timer.key, key); + return; + } + + ngx_del_timer(ev); + } + + ev->timer.key = key; + + ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0, + "event timer add: %d: %M:%M", + ngx_event_ident(ev->data), timer, ev->timer.key); + + ngx_rbtree_insert(&ngx_event_timer_rbtree, &ev->timer); + + ev->timer_set = 1; +} + + +#endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */ |