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);
38 for (i = 0; i < fncount; i++)
39 if ((fnlist[i].state >= fsm->state_count) ||
40 (fnlist[i].event >= fsm->event_count)) {
42 "mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
43 i, (long)fnlist[i].state, (long)fsm->state_count,
44 (long)fnlist[i].event, (long)fsm->event_count);
46 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
47 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
49 EXPORT_SYMBOL(mISDN_FsmNew);
52 mISDN_FsmFree(struct Fsm *fsm)
54 kfree((void *) fsm->jumpmatrix);
56 EXPORT_SYMBOL(mISDN_FsmFree);
59 mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
63 if ((fi->state >= fi->fsm->state_count) ||
64 (event >= fi->fsm->event_count)) {
66 "mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
67 (long)fi->state, (long)fi->fsm->state_count, event,
68 (long)fi->fsm->event_count);
71 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
74 fi->printdebug(fi, "State %s Event %s",
75 fi->fsm->strState[fi->state],
76 fi->fsm->strEvent[event]);
81 fi->printdebug(fi, "State %s Event %s no action",
82 fi->fsm->strState[fi->state],
83 fi->fsm->strEvent[event]);
87 EXPORT_SYMBOL(mISDN_FsmEvent);
90 mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
94 fi->printdebug(fi, "ChangeState %s",
95 fi->fsm->strState[newstate]);
97 EXPORT_SYMBOL(mISDN_FsmChangeState);
100 FsmExpireTimer(struct FsmTimer *ft)
104 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
106 mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
110 mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
115 ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
117 setup_timer(&ft->tl, (void *)FsmExpireTimer, (long)ft);
119 EXPORT_SYMBOL(mISDN_FsmInitTimer);
122 mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
126 ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
131 EXPORT_SYMBOL(mISDN_FsmDelTimer);
134 mISDN_FsmAddTimer(struct FsmTimer *ft,
135 int millisec, int event, void *arg, int where)
140 ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
141 (long) ft, millisec, where);
144 if (timer_pending(&ft->tl)) {
147 "mISDN_FsmAddTimer: timer already active!\n");
148 ft->fi->printdebug(ft->fi,
149 "mISDN_FsmAddTimer already active!");
156 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
160 EXPORT_SYMBOL(mISDN_FsmAddTimer);
163 mISDN_FsmRestartTimer(struct FsmTimer *ft,
164 int millisec, int event, void *arg, int where)
169 ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
170 (long) ft, millisec, where);
173 if (timer_pending(&ft->tl))
178 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
181 EXPORT_SYMBOL(mISDN_FsmRestartTimer);