fsm.c
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上传日期:2013-02-24
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- /* $Id: fsm.c,v 1.1.4.1 2001/11/20 14:19:35 kai Exp $
- *
- * Finite state machine
- *
- * Author Karsten Keil
- * Copyright by Karsten Keil <keil@isdn4linux.de>
- * by Kai Germaschewski <kai.germaschewski@gmx.de>
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- * Thanks to Jan den Ouden
- * Fritz Elfert
- *
- */
- #define __NO_VERSION__
- #include <linux/module.h>
- #include <linux/init.h>
- #include "hisax.h"
- #define FSM_TIMER_DEBUG 0
- EXPORT_SYMBOL(FsmNew);
- EXPORT_SYMBOL(FsmFree);
- EXPORT_SYMBOL(FsmEvent);
- EXPORT_SYMBOL(FsmChangeState);
- EXPORT_SYMBOL(FsmInitTimer);
- EXPORT_SYMBOL(FsmDelTimer);
- EXPORT_SYMBOL(FsmRestartTimer);
- int __init
- FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount)
- {
- int i;
- fsm->jumpmatrix = (FSMFNPTR *)
- kmalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL);
- if (!fsm->jumpmatrix)
- return -ENOMEM;
- memset(fsm->jumpmatrix, 0, sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count);
- for (i = 0; i < fncount; i++)
- if ((fnlist[i].state>=fsm->state_count) || (fnlist[i].event>=fsm->event_count)) {
- printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)n",
- i,(long)fnlist[i].state,(long)fsm->state_count,
- (long)fnlist[i].event,(long)fsm->event_count);
- } else
- fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
- fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
- return 0;
- }
- void
- FsmFree(struct Fsm *fsm)
- {
- kfree((void *) fsm->jumpmatrix);
- }
- int
- FsmEvent(struct FsmInst *fi, int event, void *arg)
- {
- FSMFNPTR r;
- if ((fi->state>=fi->fsm->state_count) || (event >= fi->fsm->event_count)) {
- printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)n",
- (long)fi->state,(long)fi->fsm->state_count,event,(long)fi->fsm->event_count);
- return(1);
- }
- r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
- if (r) {
- if (fi->debug)
- fi->printdebug(fi, "State %s Event %s",
- fi->fsm->strState[fi->state],
- fi->fsm->strEvent[event]);
- r(fi, event, arg);
- return (0);
- } else {
- if (fi->debug)
- fi->printdebug(fi, "State %s Event %s no routine",
- fi->fsm->strState[fi->state],
- fi->fsm->strEvent[event]);
- return (!0);
- }
- }
- void
- FsmChangeState(struct FsmInst *fi, int newstate)
- {
- fi->state = newstate;
- if (fi->debug)
- fi->printdebug(fi, "ChangeState %s",
- fi->fsm->strState[newstate]);
- }
- static void
- FsmExpireTimer(struct FsmTimer *ft)
- {
- #if FSM_TIMER_DEBUG
- if (ft->fi->debug)
- ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
- #endif
- FsmEvent(ft->fi, ft->event, ft->arg);
- }
- void
- FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
- {
- ft->fi = fi;
- ft->tl.function = (void *) FsmExpireTimer;
- ft->tl.data = (long) ft;
- #if FSM_TIMER_DEBUG
- if (ft->fi->debug)
- ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft);
- #endif
- init_timer(&ft->tl);
- }
- void
- FsmDelTimer(struct FsmTimer *ft, int where)
- {
- #if FSM_TIMER_DEBUG
- if (ft->fi->debug)
- ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where);
- #endif
- del_timer(&ft->tl);
- }
- int
- FsmAddTimer(struct FsmTimer *ft,
- int millisec, int event, void *arg, int where)
- {
- #if FSM_TIMER_DEBUG
- if (ft->fi->debug)
- ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d",
- (long) ft, millisec, where);
- #endif
- if (timer_pending(&ft->tl)) {
- printk(KERN_WARNING "FsmAddTimer: timer already active!n");
- ft->fi->printdebug(ft->fi, "FsmAddTimer already active!");
- return -1;
- }
- init_timer(&ft->tl);
- ft->event = event;
- ft->arg = arg;
- ft->tl.expires = jiffies + (millisec * HZ) / 1000;
- add_timer(&ft->tl);
- return 0;
- }
- void
- FsmRestartTimer(struct FsmTimer *ft,
- int millisec, int event, void *arg, int where)
- {
- #if FSM_TIMER_DEBUG
- if (ft->fi->debug)
- ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d",
- (long) ft, millisec, where);
- #endif
- if (timer_pending(&ft->tl))
- del_timer(&ft->tl);
- init_timer(&ft->tl);
- ft->event = event;
- ft->arg = arg;
- ft->tl.expires = jiffies + (millisec * HZ) / 1000;
- add_timer(&ft->tl);
- }