2 * finite state machine implementation
4 * Author Karsten Keil <kkeil@novell.com>
6 * Thanks to Jan den Ouden
8 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
21 #include <linux/kernel.h>
22 #include <linux/slab.h>
23 #include <linux/module.h>
24 #include <linux/string.h>
27 #define FSM_TIMER_DEBUG 0
30 mISDN_FsmNew(struct Fsm *fsm,
31 struct FsmNode *fnlist, int fncount)
35 fsm->jumpmatrix = kzalloc(sizeof(FSMFNPTR) * fsm->state_count *
36 fsm->event_count, GFP_KERNEL);
37 if (fsm->jumpmatrix == NULL)
40 for (i = 0; i < fncount; i++)
41 if ((fnlist[i].state >= fsm->state_count) ||
42 (fnlist[i].event >= fsm->event_count)) {
44 "mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
45 i, (long)fnlist[i].state, (long)fsm->state_count,
46 (long)fnlist[i].event, (long)fsm->event_count);
48 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
49 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
52 EXPORT_SYMBOL(mISDN_FsmNew);
55 mISDN_FsmFree(struct Fsm *fsm)
57 kfree((void *) fsm->jumpmatrix);
59 EXPORT_SYMBOL(mISDN_FsmFree);
62 mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
66 if ((fi->state >= fi->fsm->state_count) ||
67 (event >= fi->fsm->event_count)) {
69 "mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
70 (long)fi->state, (long)fi->fsm->state_count, event,
71 (long)fi->fsm->event_count);
74 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
77 fi->printdebug(fi, "State %s Event %s",
78 fi->fsm->strState[fi->state],
79 fi->fsm->strEvent[event]);
84 fi->printdebug(fi, "State %s Event %s no action",
85 fi->fsm->strState[fi->state],
86 fi->fsm->strEvent[event]);
90 EXPORT_SYMBOL(mISDN_FsmEvent);
93 mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
97 fi->printdebug(fi, "ChangeState %s",
98 fi->fsm->strState[newstate]);
100 EXPORT_SYMBOL(mISDN_FsmChangeState);
103 FsmExpireTimer(struct FsmTimer *ft)
107 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
109 mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
113 mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
118 ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
120 setup_timer(&ft->tl, (void *)FsmExpireTimer, (long)ft);
122 EXPORT_SYMBOL(mISDN_FsmInitTimer);
125 mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
129 ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
134 EXPORT_SYMBOL(mISDN_FsmDelTimer);
137 mISDN_FsmAddTimer(struct FsmTimer *ft,
138 int millisec, int event, void *arg, int where)
143 ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
144 (long) ft, millisec, where);
147 if (timer_pending(&ft->tl)) {
150 "mISDN_FsmAddTimer: timer already active!\n");
151 ft->fi->printdebug(ft->fi,
152 "mISDN_FsmAddTimer already active!");
159 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
163 EXPORT_SYMBOL(mISDN_FsmAddTimer);
166 mISDN_FsmRestartTimer(struct FsmTimer *ft,
167 int millisec, int event, void *arg, int where)
172 ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
173 (long) ft, millisec, where);
176 if (timer_pending(&ft->tl))
181 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
184 EXPORT_SYMBOL(mISDN_FsmRestartTimer);