162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/* $Id: fsm.c,v 1.14.6.4 2001/09/23 22:24:47 kai Exp $
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*
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* Finite state machine
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*
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* Author Karsten Keil
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* Copyright by Karsten Keil <keil@isdn4linux.de>
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* by Kai Germaschewski <kai.germaschewski@gmx.de>
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* Thanks to Jan den Ouden
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* Fritz Elfert
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include "hisax.h"
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#define FSM_TIMER_DEBUG 0
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int
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FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount)
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{
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int i;
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fsm->jumpmatrix = (FSMFNPTR *)
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kzalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL);
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if (!fsm->jumpmatrix)
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return -ENOMEM;
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for (i = 0; i < fncount; i++)
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if ((fnlist[i].state>=fsm->state_count) || (fnlist[i].event>=fsm->event_count)) {
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printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)\n",
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i,(long)fnlist[i].state,(long)fsm->state_count,
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(long)fnlist[i].event,(long)fsm->event_count);
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} else
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fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
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fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
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return 0;
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}
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void
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FsmFree(struct Fsm *fsm)
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{
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kfree((void *) fsm->jumpmatrix);
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}
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int
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FsmEvent(struct FsmInst *fi, int event, void *arg)
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{
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FSMFNPTR r;
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if ((fi->state>=fi->fsm->state_count) || (event >= fi->fsm->event_count)) {
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printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
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(long)fi->state,(long)fi->fsm->state_count,event,(long)fi->fsm->event_count);
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return(1);
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}
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r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
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if (r) {
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if (fi->debug)
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fi->printdebug(fi, "State %s Event %s",
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fi->fsm->strState[fi->state],
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fi->fsm->strEvent[event]);
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r(fi, event, arg);
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return (0);
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} else {
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if (fi->debug)
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fi->printdebug(fi, "State %s Event %s no routine",
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fi->fsm->strState[fi->state],
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fi->fsm->strEvent[event]);
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return (!0);
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}
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}
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void
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FsmChangeState(struct FsmInst *fi, int newstate)
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{
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fi->state = newstate;
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if (fi->debug)
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fi->printdebug(fi, "ChangeState %s",
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fi->fsm->strState[newstate]);
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}
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static void
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FsmExpireTimer(struct FsmTimer *ft)
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{
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#if FSM_TIMER_DEBUG
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if (ft->fi->debug)
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ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
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#endif
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FsmEvent(ft->fi, ft->event, ft->arg);
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}
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void
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FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
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{
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ft->fi = fi;
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ft->tl.function = (void *) FsmExpireTimer;
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ft->tl.data = (long) ft;
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#if FSM_TIMER_DEBUG
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if (ft->fi->debug)
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ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft);
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#endif
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init_timer(&ft->tl);
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}
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void
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FsmDelTimer(struct FsmTimer *ft, int where)
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{
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#if FSM_TIMER_DEBUG
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if (ft->fi->debug)
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ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where);
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#endif
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del_timer(&ft->tl);
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}
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int
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FsmAddTimer(struct FsmTimer *ft,
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int millisec, int event, void *arg, int where)
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{
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#if FSM_TIMER_DEBUG
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if (ft->fi->debug)
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ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d",
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(long) ft, millisec, where);
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#endif
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if (timer_pending(&ft->tl)) {
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printk(KERN_WARNING "FsmAddTimer: timer already active!\n");
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ft->fi->printdebug(ft->fi, "FsmAddTimer already active!");
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return -1;
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}
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init_timer(&ft->tl);
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ft->event = event;
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ft->arg = arg;
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ft->tl.expires = jiffies + (millisec * HZ) / 1000;
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add_timer(&ft->tl);
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return 0;
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}
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void
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FsmRestartTimer(struct FsmTimer *ft,
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int millisec, int event, void *arg, int where)
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{
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#if FSM_TIMER_DEBUG
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if (ft->fi->debug)
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ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d",
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(long) ft, millisec, where);
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#endif
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if (timer_pending(&ft->tl))
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del_timer(&ft->tl);
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init_timer(&ft->tl);
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ft->event = event;
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ft->arg = arg;
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ft->tl.expires = jiffies + (millisec * HZ) / 1000;
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add_timer(&ft->tl);
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}
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