a227843b73
This feature is not necessary anymore since we have tools like valgrind today that can catch stack overflow errors before they make a backtrace in gdb impossible.
108 lines
2.3 KiB
C
108 lines
2.3 KiB
C
/*
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event.c -- event queue
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Copyright (C) 2002-2009 Guus Sliepen <guus@tinc-vpn.org>,
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2002-2005 Ivo Timmermans
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "system.h"
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#include "avl_tree.h"
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#include "event.h"
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#include "utils.h"
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#include "xalloc.h"
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avl_tree_t *event_tree;
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extern time_t now;
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int id;
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static int event_compare(const event_t *a, const event_t *b) {
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if(a->time > b->time)
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return 1;
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if(a->time < b->time)
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return -1;
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return a->id - b->id;
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}
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void init_events(void) {
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event_tree = avl_alloc_tree((avl_compare_t) event_compare, (avl_action_t) free_event);
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}
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void exit_events(void) {
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avl_delete_tree(event_tree);
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}
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void expire_events(void) {
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avl_node_t *node;
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event_t *event;
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time_t diff;
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/*
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* Make all events appear expired by substracting the difference between
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* the expiration time of the last event and the current time.
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*/
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if(!event_tree->tail)
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return;
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event = event_tree->tail->data;
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if(event->time < now)
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return;
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diff = 1 + event->time - now;
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for(node = event_tree->head; node; node = node->next) {
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event = node->data;
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event->time -= diff;
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}
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}
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event_t *new_event(void) {
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return xmalloc_and_zero(sizeof(event_t));
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}
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void free_event(event_t *event) {
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free(event);
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}
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void event_add(event_t *event) {
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event->id = ++id;
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avl_insert(event_tree, event);
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}
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void event_del(event_t *event) {
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avl_delete(event_tree, event);
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}
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event_t *get_expired_event(void) {
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event_t *event;
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if(event_tree->head) {
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event = event_tree->head->data;
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if(event->time < now) {
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avl_node_t *node = event_tree->head;
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avl_unlink_node(event_tree, node);
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free(node);
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return event;
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}
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}
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return NULL;
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}
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