110 lines
2 KiB
C
110 lines
2 KiB
C
/*
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event.c -- event queue
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Copyright (C) 2002 Guus Sliepen <guus@sliepen.warande.net>,
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2002 Ivo Timmermans <itimmermans@bigfoot.com>
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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
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: event.c,v 1.1.4.2 2002/03/01 14:09:30 guus Exp $
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <xalloc.h>
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#include <string.h>
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#include <utils.h>
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#include <avl_tree.h>
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#include <time.h>
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#include "event.h"
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#include "system.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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int event_compare(event_t *a, event_t *b)
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{
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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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{
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cp
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event_tree = avl_alloc_tree((avl_compare_t)event_compare, NULL);
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cp
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}
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void exit_events(void)
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{
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cp
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avl_delete_tree(event_tree);
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cp
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}
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event_t *new_event(void)
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{
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event_t *event;
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cp
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event = (event_t *)xmalloc_and_zero(sizeof(*event));
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cp
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return event;
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}
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void free_event(event_t *event)
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{
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cp
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free(event);
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cp
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}
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void event_add(event_t *event)
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{
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cp
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event->id = ++id;
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avl_insert(event_tree, event);
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cp
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}
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void event_del(event_t *event)
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{
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cp
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avl_delete(event_tree, event);
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cp
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}
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event_t *get_expired_event(void)
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{
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event_t *event;
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cp
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if(event_tree->head)
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{
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event = (event_t *)event_tree->head->data;
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if(event->time < now)
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{
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avl_delete(event_tree, event);
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return event;
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}
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}
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cp
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return NULL;
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}
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