view arogue5/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 a5433ba4cabf
children 56e748983fa8
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/*
 * Contains functions for dealing with things that happen in the future.
 *
 * Advanced Rogue
 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
 * All rights reserved.
 *
 * Based on "Rogue: Exploring the Dungeons of Doom"
 * Copyright (C) 1980, 1981 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 EMPTY		0
#define DAEMON		-1

#define _X_ { EMPTY }

struct delayed_action d_list[MAXDAEMONS] = {
	_X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_
};
struct delayed_action f_list[MAXFUSES] = {
	_X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
	_X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_
};
int demoncnt = 0;	/* number of active daemons */
int fusecnt = 0;


/*
 * d_slot:
 *	Find an empty slot in the daemon list
 */
struct delayed_action *
d_slot()
{
	reg int i;
	reg struct delayed_action *dev;

	for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
		if (dev->d_type == EMPTY)
			return dev;
	return NULL;
}

/*
 * f_slot:
 *	Find an empty slot in the fuses list
 */
struct delayed_action *
f_slot()
{
	reg int i;
	reg struct delayed_action *dev;

	for (i = 0, dev = f_list; i < MAXFUSES; i++, dev++)
		if (dev->d_type == EMPTY)
			return dev;
	return NULL;
}



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

	for (i = 0, dev = f_list; i < MAXFUSES; i++, dev++)
		if (dev->d_type != EMPTY && func == dev->d_func)
			return dev;
	return NULL;
}


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

	dev = d_slot();
	if (dev != NULL) {
		dev->d_type = type;
		dev->d_func = func;
		dev->d_arg = arg;
		dev->d_time = DAEMON;
		demoncnt += 1;			/* update count */
	}
}


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

	for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++) {
		if (dev->d_type != EMPTY && func == dev->d_func)
			break;
	}
	if (i >= MAXDAEMONS) return; /* if not found, forget it */
	/*
	 * Take it out of the list
	 */
	dev->d_type = EMPTY;
	dev->d_arg = NULL;
	dev->d_func = NULL;
	dev->d_time = 0;
	demoncnt -= 1;			/* update count */
}


/*
 * do_daemons:
 *	Run all the daemons that are active with the current flag,
 *	passing the argument to the function.
 */
do_daemons(flag)
reg int flag;
{
	reg 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_func != NULL && 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
 */
fuse(int (*func)(), void *arg, int time, int type)
{
	reg struct delayed_action *wire;

	wire = f_slot();
	if (wire != NULL) {
		wire->d_type = type;
		wire->d_func = func;
		wire->d_arg = arg;
		wire->d_time = time;
		fusecnt += 1;			/* update count */
	}
}


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

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


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

	if ((wire = find_slot(func)) == NULL)
		return;
	wire->d_type = EMPTY;
	wire->d_func = NULL;
	wire->d_arg = NULL;
	wire->d_time = 0;
	fusecnt -= 1;
}


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

	/*
	 * Step though the list
	 */
	for (wire = f_list; wire <= &f_list[MAXFUSES-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;
		if (wire->d_func != NULL)
		    (*wire->d_func)(wire->d_arg);
		fusecnt -= 1;
	    }
	}
}

/*
 * activity:
 *	Show wizard number of demaons and memory blocks used
 */
activity()
{
	sprintf(outstring,"Daemons = %d : Fuses = %d : Memory Items = %d : Memory Used = %d",
	    demoncnt,fusecnt,total,md_memused());
	msg(outstring);
}