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21#include <linux/kernel.h>
22#include <linux/slab.h>
23#include <linux/module.h>
24#include <linux/string.h>
25#include "fsm.h"
26
27#define FSM_TIMER_DEBUG 0
28
29int
30mISDN_FsmNew(struct Fsm *fsm,
31 struct FsmNode *fnlist, int fncount)
32{
33 int i;
34
35 fsm->jumpmatrix = kzalloc(sizeof(FSMFNPTR) * fsm->state_count *
36 fsm->event_count, GFP_KERNEL);
37 if (fsm->jumpmatrix == NULL)
38 return -ENOMEM;
39
40 for (i = 0; i < fncount; i++)
41 if ((fnlist[i].state >= fsm->state_count) ||
42 (fnlist[i].event >= fsm->event_count)) {
43 printk(KERN_ERR
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);
47 } else
48 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
49 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
50 return 0;
51}
52EXPORT_SYMBOL(mISDN_FsmNew);
53
54void
55mISDN_FsmFree(struct Fsm *fsm)
56{
57 kfree((void *) fsm->jumpmatrix);
58}
59EXPORT_SYMBOL(mISDN_FsmFree);
60
61int
62mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
63{
64 FSMFNPTR r;
65
66 if ((fi->state >= fi->fsm->state_count) ||
67 (event >= fi->fsm->event_count)) {
68 printk(KERN_ERR
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);
72 return 1;
73 }
74 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
75 if (r) {
76 if (fi->debug)
77 fi->printdebug(fi, "State %s Event %s",
78 fi->fsm->strState[fi->state],
79 fi->fsm->strEvent[event]);
80 r(fi, event, arg);
81 return 0;
82 } else {
83 if (fi->debug)
84 fi->printdebug(fi, "State %s Event %s no action",
85 fi->fsm->strState[fi->state],
86 fi->fsm->strEvent[event]);
87 return 1;
88 }
89}
90EXPORT_SYMBOL(mISDN_FsmEvent);
91
92void
93mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
94{
95 fi->state = newstate;
96 if (fi->debug)
97 fi->printdebug(fi, "ChangeState %s",
98 fi->fsm->strState[newstate]);
99}
100EXPORT_SYMBOL(mISDN_FsmChangeState);
101
102static void
103FsmExpireTimer(struct timer_list *t)
104{
105 struct FsmTimer *ft = from_timer(ft, t, tl);
106#if FSM_TIMER_DEBUG
107 if (ft->fi->debug)
108 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
109#endif
110 mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
111}
112
113void
114mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
115{
116 ft->fi = fi;
117#if FSM_TIMER_DEBUG
118 if (ft->fi->debug)
119 ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
120#endif
121 timer_setup(&ft->tl, FsmExpireTimer, 0);
122}
123EXPORT_SYMBOL(mISDN_FsmInitTimer);
124
125void
126mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
127{
128#if FSM_TIMER_DEBUG
129 if (ft->fi->debug)
130 ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
131 (long) ft, where);
132#endif
133 del_timer(&ft->tl);
134}
135EXPORT_SYMBOL(mISDN_FsmDelTimer);
136
137int
138mISDN_FsmAddTimer(struct FsmTimer *ft,
139 int millisec, int event, void *arg, int where)
140{
141
142#if FSM_TIMER_DEBUG
143 if (ft->fi->debug)
144 ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
145 (long) ft, millisec, where);
146#endif
147
148 if (timer_pending(&ft->tl)) {
149 if (ft->fi->debug) {
150 printk(KERN_WARNING
151 "mISDN_FsmAddTimer: timer already active!\n");
152 ft->fi->printdebug(ft->fi,
153 "mISDN_FsmAddTimer already active!");
154 }
155 return -1;
156 }
157 ft->event = event;
158 ft->arg = arg;
159 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
160 add_timer(&ft->tl);
161 return 0;
162}
163EXPORT_SYMBOL(mISDN_FsmAddTimer);
164
165void
166mISDN_FsmRestartTimer(struct FsmTimer *ft,
167 int millisec, int event, void *arg, int where)
168{
169
170#if FSM_TIMER_DEBUG
171 if (ft->fi->debug)
172 ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
173 (long) ft, millisec, where);
174#endif
175
176 if (timer_pending(&ft->tl))
177 del_timer(&ft->tl);
178 ft->event = event;
179 ft->arg = arg;
180 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
181 add_timer(&ft->tl);
182}
183EXPORT_SYMBOL(mISDN_FsmRestartTimer);
184
