view rogue5/daemon.c @ 162:600873555ec0

Don't swap signal handlers in md_shellescape(). md_shellescape() sets SIGINT and SIGQUIT to be ignored, storing the previous handlers, and restores them after the shell exits. But it mixed up the two handlers. Since the signals were usually handled by the same function, this fix doesn't have much effect, but anything that makes signal code less confusing is a good thing.
author John "Elwin" Edwards
date Mon, 08 Jun 2015 10:01:25 -0400
parents f502bf60e6e4
children
line wrap: on
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/*
 * Contains functions for dealing with things that happen in the
 * future.
 *
 * @(#)daemon.c	4.7 (Berkeley) 02/05/99
 *
 * Rogue: Exploring the Dungeons of Doom
 * Copyright (C) 1980-1983, 1985, 1999 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

#include <curses.h>
#include "rogue.h"

#define DAEMON -1

/*
 * d_slot:
 *	Find an empty slot in the daemon/fuse list
 */
struct delayed_action *
d_slot(void)
{
    struct delayed_action *dev;

    for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
	if (dev->d_type == EMPTY)
	    return dev;
#ifdef MASTER
    debug("Ran out of fuse slots");
#endif
    return NULL;
}

/*
 * find_slot:
 *	Find a particular slot in the table
 */
struct delayed_action *
find_slot(void (*func)())
{
    struct delayed_action *dev;

    for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
	if (dev->d_type != EMPTY && func == dev->d_func)
	    return dev;
    return NULL;
}

/*
 * start_daemon:
 *	Start a daemon, takes a function.
 */
void
start_daemon(void (*func)(), int arg, int type)
{
    struct delayed_action *dev;

    dev = d_slot();
    dev->d_type = type;
    dev->d_func = func;
    dev->d_arg = arg;
    dev->d_time = DAEMON;
}

/*
 * kill_daemon:
 *	Remove a daemon from the list
 */
void
kill_daemon(void (*func)())
{
    struct delayed_action *dev;

    if ((dev = find_slot(func)) == NULL)
	return;
    /*
     * Take it out of the list
     */
    dev->d_type = EMPTY;
}

/*
 * do_daemons:
 *	Run all the daemons that are active with the current flag,
 *	passing the argument to the function.
 */
void
do_daemons(int flag)
{
    struct delayed_action *dev;

    /*
     * Loop through the devil list
     */
    for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
	/*
	 * Executing each one, giving it the proper arguments
	 */
	if (dev->d_type == flag && dev->d_time == DAEMON)
	    (*dev->d_func)(dev->d_arg);
}

/*
 * fuse:
 *	Start a fuse to go off in a certain number of turns
 */
void
fuse(void (*func)(), int arg, int time, int type)
{
    struct delayed_action *wire;

    wire = d_slot();
    wire->d_type = type;
    wire->d_func = func;
    wire->d_arg = arg;
    wire->d_time = time;
}

/*
 * lengthen:
 *	Increase the time until a fuse goes off
 */
void
lengthen(void (*func)(), int xtime)
{
    struct delayed_action *wire;

    if ((wire = find_slot(func)) == NULL)
	return;
    wire->d_time += xtime;
}

/*
 * extinguish:
 *	Put out a fuse
 */
void
extinguish(void (*func)())
{
    struct delayed_action *wire;

    if ((wire = find_slot(func)) == NULL)
	return;
    wire->d_type = EMPTY;
}

/*
 * do_fuses:
 *	Decrement counters and start needed fuses
 */
void
do_fuses(int flag)
{
    struct delayed_action *wire;

    /*
     * Step though the list
     */
    for (wire = d_list; wire <= &d_list[MAXDAEMONS-1]; wire++)
	/*
	 * Decrementing counters and starting things we want.  We also need
	 * to remove the fuse from the list once it has gone off.
	 */
	if (flag == wire->d_type && wire->d_time > 0 && --wire->d_time == 0)
	{
	    wire->d_type = EMPTY;
	    (*wire->d_func)(wire->d_arg);
	}
}