/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_TIMER_H_INCLUDED_
#define _NXT_TIMER_H_INCLUDED_
/* Valid values are between 1ms to 255ms. */
#define NXT_TIMER_DEFAULT_PRECISION 100
//#define NXT_TIMER_DEFAULT_PRECISION 1
#if (NXT_DEBUG)
#define NXT_TIMER { NXT_RBTREE_NODE_INIT, 0, 0, 0, \
NULL, NULL, NULL, NULL, -1 }
#else
#define NXT_TIMER { NXT_RBTREE_NODE_INIT, 0, 0, 0, \
NULL, NULL, NULL, NULL }
#endif
typedef struct {
/* The rbtree node must be the first field. */
NXT_RBTREE_NODE (node);
uint8_t state;
uint8_t precision;
nxt_msec_t time;
nxt_work_queue_t *work_queue;
nxt_work_handler_t handler;
nxt_task_t *task;
nxt_log_t *log;
#if (NXT_DEBUG)
int32_t ident;
#endif
} nxt_timer_t;
typedef struct {
nxt_msec_t time;
nxt_timer_t *timer;
} nxt_timer_change_t;
typedef struct {
nxt_rbtree_t tree;
/* An overflown milliseconds counter. */
nxt_msec_t now;
nxt_uint_t mchanges;
nxt_uint_t nchanges;
nxt_timer_change_t *changes;
} nxt_timers_t;
#define nxt_timer_data(obj, type, timer) \
nxt_container_of(obj, type, timer)
/*
* When timer resides in rbtree all links of its node are not NULL.
* A parent link is the nearst to other timer flags.
*/
#define nxt_timer_is_in_tree(timer) \
((timer)->node.parent != NULL)
#define nxt_timer_in_tree_set(timer)
/* Noop, because rbtree insertion sets a node's parent link. */
#define nxt_timer_in_tree_clear(timer) \
(timer)->node.parent = NULL
#define NXT_TIMER_DISABLED 0
#define NXT_TIMER_BLOCKED 1
#define NXT_TIMER_ACTIVE 2
#if (NXT_DEBUG)
#define nxt_timer_ident(timer, val) \
(timer)->ident = (val)
#else
#define nxt_timer_ident(timer, val)
#endif
nxt_inline nxt_timer_t *
nxt_timer_create(int32_t ident)
{
nxt_timer_t *timer;
timer = nxt_zalloc(sizeof(nxt_timer_t));
if (timer == NULL) {
return NULL;
}
timer->precision = NXT_TIMER_DEFAULT_PRECISION;
#if (NXT_DEBUG)
timer->ident = ident;
#endif
return timer;
}
nxt_int_t nxt_timers_init(nxt_timers_t *timers, nxt_uint_t mchanges);
NXT_EXPORT void nxt_timer_add(nxt_event_engine_t *engine, nxt_timer_t *timer,
nxt_msec_t timeout);
NXT_EXPORT void nxt_timer_delete(nxt_event_engine_t *engine,
nxt_timer_t *timer);
nxt_msec_t nxt_timer_find(nxt_event_engine_t *engine);
void nxt_timer_expire(nxt_thread_t *thr, nxt_msec_t now);
#if (NXT_DEBUG)
NXT_EXPORT void nxt_timer_disable(nxt_timer_t *timer);
#else
#define nxt_timer_disable(timer) \
(timer)->state = NXT_TIMER_DISABLED
#endif
#endif /* _NXT_TIMER_H_INCLUDED_ */
