/* DE1: $Id: p_think.h 1713 2004-05-31 15:04:44Z skyjake $
 * Copyright (C) 2003, 2004 Jaakko Keränen <jaakko.keranen@iki.fi>
 *
 * 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: http://www.opensource.org/
 *
 * Based on Hexen by Raven Software.
 */

/*
 * p_think.h: Thinkers
 */

#ifndef __DOOMSDAY_THINKER_H__
#define __DOOMSDAY_THINKER_H__

// think_t is a function pointer to a routine to handle an actor
typedef void    (*think_t) ();

typedef struct thinker_s {
	struct thinker_s *prev, *next;
	think_t         function;
	thid_t          id;			   // Only used for mobjs (zero is not an ID).
} thinker_t;

extern thinker_t thinkercap;	   // both the head and tail of the thinker list

void            P_RunThinkers(void);
void            P_InitThinkers(void);
void            P_AddThinker(thinker_t *thinker);
void            P_RemoveThinker(thinker_t *thinker);
void            P_SetMobjID(thid_t id, boolean state);
boolean         P_IsUsedMobjID(thid_t id);
boolean         P_IsMobjThinker(think_t thinker);

#endif