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#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>
static ngx_event_t *ngx_timer_queue, ngx_temp_timer_queue;
static int ngx_timer_cur_queue;
static int ngx_timer_queue_num;
static int ngx_expire_timers;
int ngx_event_timer_init(ngx_cycle_t *cycle)
{
int i;
ngx_event_t *new_queue;
ngx_event_conf_t *ecf;
ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module);
if (ngx_timer_queue_num < ecf->timer_queues) {
ngx_test_null(new_queue,
ngx_alloc(ecf->timer_queues * sizeof(ngx_event_t),
cycle->log),
NGX_ERROR);
for (i = 0; i < ngx_timer_queue_num; i++) {
new_queue[i] = ngx_timer_queue[i];
}
if (ngx_timer_queue) {
ngx_free(ngx_timer_queue);
}
ngx_timer_queue = new_queue;
ngx_timer_queue_num = ecf->timer_queues;
ngx_timer_cur_queue = 0;
for (/* void */; i < ngx_timer_queue_num; i++) {
ngx_timer_queue[i].timer_prev = &ngx_timer_queue[i];
ngx_timer_queue[i].timer_next = &ngx_timer_queue[i];
}
} else if (ngx_timer_queue_num > ecf->timer_queues) {
/* STUB */
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "NOT READY: timer");
exit(1);
}
ngx_temp_timer_queue.timer_prev = &ngx_temp_timer_queue;
ngx_temp_timer_queue.timer_next = &ngx_temp_timer_queue;
return NGX_OK;;
}
void ngx_event_timer_done(ngx_cycle_t *cycle)
{
ngx_free(ngx_timer_queue);
ngx_timer_queue = NULL;
ngx_timer_queue_num = 0;
}
void ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
{
ngx_event_t *e, *queue;
#if (NGX_DEBUG_EVENT)
ngx_connection_t *c = ev->data;
ngx_log_debug(ev->log, "set timer: %d:%d, slot: %d" _
c->fd _ timer _ ngx_timer_cur_queue);
#endif
if (ev->timer_next || ev->timer_prev) {
ngx_log_error(NGX_LOG_ALERT, ev->log, 0, "timer already set");
return;
}
if (ngx_expire_timers) {
queue = &ngx_temp_timer_queue;
} else {
queue = &ngx_timer_queue[ngx_timer_cur_queue++];
if (ngx_timer_cur_queue >= ngx_timer_queue_num) {
ngx_timer_cur_queue = 0;
}
}
for (e = queue->timer_next;
e != queue && timer > e->timer_delta;
e = e->timer_next)
{
timer -= e->timer_delta;
}
ev->timer_delta = timer;
ev->timer_next = e;
ev->timer_prev = e->timer_prev;
e->timer_prev->timer_next = ev;
e->timer_prev = ev;
}
int ngx_event_find_timer(void)
{
int i;
ngx_msec_t timer;
timer = NGX_MAX_MSEC;
for (i = 0; i < ngx_timer_queue_num; i++) {
if (ngx_timer_queue[i].timer_next == &ngx_timer_queue[i]) {
continue;
}
if (timer > ngx_timer_queue[i].timer_next->timer_delta) {
timer = ngx_timer_queue[i].timer_next->timer_delta;
}
}
if (timer == NGX_MAX_MSEC) {
return 0;
} else {
return timer;
}
}
void ngx_event_expire_timers(ngx_msec_t timer)
{
int i;
ngx_msec_t delta;
ngx_event_t *ev;
ngx_expire_timers = 1;
for (i = 0; i < ngx_timer_queue_num; i++) {
delta = timer;
for ( ;; ) {
ev = ngx_timer_queue[i].timer_next;
if (ev == &ngx_timer_queue[i]) {
break;
}
if (ev->timer_delta > delta) {
ev->timer_delta -= delta;
break;
}
delta -= ev->timer_delta;
ngx_del_timer(ev);
ev->timer_set = 0;
if (ev->delayed) {
ev->delayed = 0;
if (ev->ready == 0) {
continue;
}
} else {
ev->timedout = 1;
}
ev->event_handler(ev);
}
}
ngx_expire_timers = 0;
if (ngx_temp_timer_queue.timer_next == &ngx_temp_timer_queue) {
return;
}
timer = 0;
while (ngx_temp_timer_queue.timer_next != &ngx_temp_timer_queue) {
timer += ngx_temp_timer_queue.timer_next->timer_delta;
ev = ngx_temp_timer_queue.timer_next;
ngx_del_timer(ev);
ngx_add_timer(ev, timer);
}
}
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