timer.c

打魔兽战网的都知道他是什么

/*
 * Copyright (C) 1999,2000  Ross Combs ([e-mail])
 * Copyright (C) 2004 Dizzy 
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#define TIMER_INTERNAL_ACCESS
#include "common/setup_before.h"
#ifdef STDC_HEADERS
# include <stdlib.h>
#else
# ifdef HAVE_MALLOC_H
#  include <malloc.h>
# endif
#endif
#include "common/elist.h"
#include "connection.h"
#include "common/eventlog.h"
#include "common/xalloc.h"
#include "timer.h"
#include "common/setup_after.h"


static t_elist timerlist_head;


extern int timerlist_add_timer(t_connection * owner, time_t when, t_timer_cb cb, t_timer_data data)
{
    t_timer * timer, *ctimer;
    t_elist * curr;

    if (!owner)
    {
	eventlog(eventlog_level_error,__FUNCTION__,"got NULL owner");
	return -1;
    }
    
    timer = xmalloc(sizeof(t_timer));
    timer->owner = owner;
    timer->when  = when;
    timer->cb    = cb;
    timer->data  = data;

    /* try to preserve a when based order */
    elist_for_each(curr,&timerlist_head)
    {
	ctimer = elist_entry(curr,t_timer,timers);
	if (ctimer->when > when) break;
    }
    elist_add_tail(curr, &timer->timers);

    /* add it to the t_conn timers list */
    elist_add_tail(conn_get_timer(owner), &timer->owners);

    return 0;
}


extern int timerlist_del_all_timers(t_connection * owner)
{
    t_elist * curr, *save;
    t_timer * timer;

    if (!owner)
    {
	eventlog(eventlog_level_error,__FUNCTION__,"got NULL owner");
	return -1;
    }

    elist_for_each_safe(curr,conn_get_timer(owner),save)
    {
	timer = elist_entry(curr, t_timer, owners);
	if (timer->cb)
	    timer->cb(timer->owner,(time_t)0,timer->data);
	elist_del(&timer->owners);
	elist_del(&timer->timers);
	xfree((void*)timer);
    }

    return 0;
}


extern int timerlist_check_timers(time_t when)
{
    t_elist * curr, *save;
    t_timer * timer;

    elist_for_each_safe(curr,&timerlist_head,save)
    {
	timer = elist_entry(curr,t_timer,timers);
	if (timer->owner && timer->when<when)
	{
	    if (timer->cb)
		timer->cb(timer->owner,timer->when,timer->data);
	    elist_del(&timer->owners);
	    elist_del(&timer->timers);
	    xfree((void*)timer);
	} else break; /* beeing sorted there is no need to go beyond this point */
    }

    return 0;
}

extern int timerlist_create(void)
{
    elist_init(&timerlist_head);
    return 0;
}


extern int timerlist_destroy(void)
{
    t_elist * curr, *save;
    t_timer * timer;
    
    elist_for_each_safe(curr,&timerlist_head,save)
    {
        timer = elist_entry(curr,t_timer,timers);
	elist_del(&timer->owners);
	elist_del(&timer->timers);
	xfree((void*)timer);
    }
    elist_init(&timerlist_head);
    
    return 0;
}