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-rw-r--r--src/nxt_event_timer.c319
1 files changed, 0 insertions, 319 deletions
diff --git a/src/nxt_event_timer.c b/src/nxt_event_timer.c
deleted file mode 100644
index 56514683..00000000
--- a/src/nxt_event_timer.c
+++ /dev/null
@@ -1,319 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- * Copyright (C) NGINX, Inc.
- */
-
-#include <nxt_main.h>
-
-
-/*
- * Timer operations are batched to improve instruction and data
- * cache locality of rbtree operations.
- *
- * nxt_event_timer_add() adds a timer to the changes array to add or to
- * modify the timer. The changes are processed by nxt_event_timer_find().
- *
- * nxt_event_timer_disable() disables a timer. The disabled timer may
- * however present in rbtree for a long time and may be eventually removed
- * by nxt_event_timer_find() or nxt_event_timer_expire().
- *
- * nxt_event_timer_delete() removes a timer at once from both the rbtree and
- * the changes array and should be used only if the timer memory must be freed.
- */
-
-static intptr_t nxt_event_timer_rbtree_compare(nxt_rbtree_node_t *node1,
- nxt_rbtree_node_t *node2);
-static void nxt_event_timer_change(nxt_event_timers_t *timers,
- nxt_event_timer_t *ev, nxt_msec_t time);
-static void nxt_event_commit_timer_changes(nxt_event_timers_t *timers);
-static void nxt_event_timer_drop_changes(nxt_event_timers_t *timers,
- nxt_event_timer_t *ev);
-
-
-nxt_int_t
-nxt_event_timers_init(nxt_event_timers_t *timers, nxt_uint_t mchanges)
-{
- nxt_rbtree_init(&timers->tree, nxt_event_timer_rbtree_compare);
-
- timers->mchanges = mchanges;
-
- timers->changes = nxt_malloc(sizeof(nxt_event_timer_change_t) * mchanges);
-
- if (nxt_fast_path(timers->changes != NULL)) {
- return NXT_OK;
- }
-
- return NXT_ERROR;
-}
-
-
-static intptr_t
-nxt_event_timer_rbtree_compare(nxt_rbtree_node_t *node1,
- nxt_rbtree_node_t *node2)
-{
- nxt_event_timer_t *ev1, *ev2;
-
- ev1 = (nxt_event_timer_t *) node1;
- ev2 = (nxt_event_timer_t *) node2;
-
- /*
- * Timer values are distributed in small range, usually several minutes
- * and overflow every 49 days if nxt_msec_t is stored in 32 bits.
- * This signed comparison takes into account that overflow.
- */
- /* ev1->time < ev2->time */
- return nxt_msec_diff(ev1->time, ev2->time);
-}
-
-
-void
-nxt_event_timer_add(nxt_event_engine_t *engine, nxt_event_timer_t *ev,
- nxt_msec_t timer)
-{
- int32_t diff;
- uint32_t time;
-
- time = engine->timers.now + timer;
-
- if (nxt_event_timer_is_in_tree(ev)) {
-
- diff = nxt_msec_diff(time, ev->time);
-
- /*
- * Use the previous timer if difference between it and the
- * new timer is less than required precision milliseconds:
- * this decreases rbtree operations for fast connections.
- */
-
- if (nxt_abs(diff) < ev->precision) {
- nxt_log_debug(ev->log, "event timer previous: %D: %d:%M",
- ev->ident, ev->state, time);
-
- if (ev->state == NXT_EVENT_TIMER_DISABLED) {
- ev->state = NXT_EVENT_TIMER_ACTIVE;
- }
-
- return;
- }
-
- nxt_log_debug(ev->log, "event timer change: %D: %d:%M",
- ev->ident, ev->state, ev->time);
-
- } else {
- /*
- * The timer's time is updated here just to log a correct
- * value by debug logging in nxt_event_timer_disable().
- * It could be updated only in nxt_event_commit_timer_changes()
- * just before nxt_rbtree_insert().
- */
- ev->time = time;
-
- nxt_log_debug(ev->log, "event timer add: %D: %M:%M",
- ev->ident, timer, time);
- }
-
- nxt_event_timer_change(&engine->timers, ev, time);
-}
-
-
-static void
-nxt_event_timer_change(nxt_event_timers_t *timers, nxt_event_timer_t *ev,
- nxt_msec_t time)
-{
- nxt_event_timer_change_t *ch;
-
- if (timers->nchanges >= timers->mchanges) {
- nxt_event_commit_timer_changes(timers);
- }
-
- ev->state = NXT_EVENT_TIMER_ACTIVE;
-
- ch = &timers->changes[timers->nchanges];
- ch->time = time;
- ch->event = ev;
- timers->nchanges++;
-}
-
-
-#if (NXT_DEBUG)
-
-void
-nxt_event_timer_disable(nxt_event_timer_t *ev)
-{
- nxt_debug(ev->task, "event timer disable: %D: %d:%M",
- ev->ident, ev->state, ev->time);
-
- ev->state = NXT_EVENT_TIMER_DISABLED;
-}
-
-#endif
-
-
-void
-nxt_event_timer_delete(nxt_event_engine_t *engine, nxt_event_timer_t *ev)
-{
- if (nxt_event_timer_is_in_tree(ev)) {
- nxt_log_debug(ev->log, "event timer delete: %D: %d:%M",
- ev->ident, ev->state, ev->time);
-
- nxt_rbtree_delete(&engine->timers.tree, &ev->node);
- nxt_event_timer_in_tree_clear(ev);
- ev->state = NXT_EVENT_TIMER_DISABLED;
- }
-
- nxt_event_timer_drop_changes(&engine->timers, ev);
-}
-
-
-static void
-nxt_event_timer_drop_changes(nxt_event_timers_t *timers, nxt_event_timer_t *ev)
-{
- nxt_event_timer_change_t *dst, *src, *end;
-
- dst = timers->changes;
- end = dst + timers->nchanges;
-
- for (src = dst; src < end; src++) {
-
- if (src->event == ev) {
- continue;
- }
-
- if (dst != src) {
- *dst = *src;
- }
-
- dst++;
- }
-
- timers->nchanges -= end - dst;
-}
-
-
-static void
-nxt_event_commit_timer_changes(nxt_event_timers_t *timers)
-{
- nxt_event_timer_t *ev;
- nxt_event_timer_change_t *ch, *end;
-
- nxt_thread_log_debug("event timers changes: %ui", timers->nchanges);
-
- ch = timers->changes;
- end = ch + timers->nchanges;
-
- while (ch < end) {
- ev = ch->event;
-
- if (ev->state != NXT_EVENT_TIMER_DISABLED) {
-
- if (nxt_event_timer_is_in_tree(ev)) {
- nxt_log_debug(ev->log, "event timer delete: %D: %d:%M",
- ev->ident, ev->state, ev->time);
-
- nxt_rbtree_delete(&timers->tree, &ev->node);
-
- ev->time = ch->time;
- }
-
- nxt_log_debug(ev->log, "event timer add: %D: %M",
- ev->ident, ev->time);
-
- nxt_rbtree_insert(&timers->tree, &ev->node);
- nxt_event_timer_in_tree_set(ev);
- }
-
- ch++;
- }
-
- timers->nchanges = 0;
-}
-
-
-nxt_msec_t
-nxt_event_timer_find(nxt_event_engine_t *engine)
-{
- int32_t time;
- nxt_rbtree_node_t *node, *next;
- nxt_event_timer_t *ev;
-
- if (engine->timers.nchanges != 0) {
- nxt_event_commit_timer_changes(&engine->timers);
- }
-
- for (node = nxt_rbtree_min(&engine->timers.tree);
- nxt_rbtree_is_there_successor(&engine->timers.tree, node);
- node = next)
- {
- next = nxt_rbtree_node_successor(&engine->timers.tree, node);
-
- ev = (nxt_event_timer_t *) node;
-
- if (ev->state != NXT_EVENT_TIMER_DISABLED) {
-
- if (ev->state == NXT_EVENT_TIMER_BLOCKED) {
- nxt_log_debug(ev->log, "event timer blocked: %D: %M",
- ev->ident, ev->time);
- continue;
- }
-
- time = nxt_msec_diff(ev->time, engine->timers.now);
-
- return (nxt_msec_t) nxt_max(time, 0);
- }
-
- /* Delete disabled timer. */
-
- nxt_log_debug(ev->log, "event timer delete: %D: 0:%M",
- ev->ident, ev->time);
-
- nxt_rbtree_delete(&engine->timers.tree, &ev->node);
- nxt_event_timer_in_tree_clear(ev);
- }
-
- return NXT_INFINITE_MSEC;
-}
-
-
-void
-nxt_event_timer_expire(nxt_thread_t *thr, nxt_msec_t now)
-{
- nxt_rbtree_t *tree;
- nxt_rbtree_node_t *node, *next;
- nxt_event_timer_t *ev;
-
- thr->engine->timers.now = now;
- tree = &thr->engine->timers.tree;
-
- for (node = nxt_rbtree_min(tree);
- nxt_rbtree_is_there_successor(tree, node);
- node = next)
- {
- ev = (nxt_event_timer_t *) node;
-
- /* ev->time > now */
- if (nxt_msec_diff(ev->time, now) > 0) {
- return;
- }
-
- next = nxt_rbtree_node_successor(tree, node);
-
- if (ev->state == NXT_EVENT_TIMER_BLOCKED) {
- nxt_log_debug(ev->log, "event timer blocked: %D: %M",
- ev->ident, ev->time);
- continue;
- }
-
- nxt_log_debug(ev->log, "event timer delete: %D: %d:%M",
- ev->ident, ev->state, ev->time);
-
- nxt_rbtree_delete(tree, &ev->node);
- nxt_event_timer_in_tree_clear(ev);
-
- if (ev->state != NXT_EVENT_TIMER_DISABLED) {
- ev->state = NXT_EVENT_TIMER_DISABLED;
-
- nxt_work_queue_add(ev->work_queue, ev->handler, ev->task, ev, NULL);
- }
- }
-}
generated by cgit (git 2.34.1) at 2024-11-16 23:47:04 +0000