mirror of https://gitee.com/openkylin/linux.git
163 lines
3.7 KiB
C
163 lines
3.7 KiB
C
/* $Id: fsm.c,v 1.14.6.4 2001/09/23 22:24:47 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
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include "hisax.h"
|
|
|
|
#define FSM_TIMER_DEBUG 0
|
|
|
|
int
|
|
FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount)
|
|
{
|
|
int i;
|
|
|
|
fsm->jumpmatrix = (FSMFNPTR *)
|
|
kzalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL);
|
|
if (!fsm->jumpmatrix)
|
|
return -ENOMEM;
|
|
|
|
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);
|
|
}
|