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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 =
36 kzalloc(array3_size(sizeof(FSMFNPTR), fsm->state_count,
37 fsm->event_count),
38 GFP_KERNEL);
39 if (fsm->jumpmatrix == NULL)
40 return -ENOMEM;
41
42 for (i = 0; i < fncount; i++)
43 if ((fnlist[i].state >= fsm->state_count) ||
44 (fnlist[i].event >= fsm->event_count)) {
45 printk(KERN_ERR
46 "mISDN_FsmNew Error: %d st(%ld/%ld) ev(%ld/%ld)\n",
47 i, (long)fnlist[i].state, (long)fsm->state_count,
48 (long)fnlist[i].event, (long)fsm->event_count);
49 } else
50 fsm->jumpmatrix[fsm->state_count * fnlist[i].event +
51 fnlist[i].state] = (FSMFNPTR) fnlist[i].routine;
52 return 0;
53}
54EXPORT_SYMBOL(mISDN_FsmNew);
55
56void
57mISDN_FsmFree(struct Fsm *fsm)
58{
59 kfree((void *) fsm->jumpmatrix);
60}
61EXPORT_SYMBOL(mISDN_FsmFree);
62
63int
64mISDN_FsmEvent(struct FsmInst *fi, int event, void *arg)
65{
66 FSMFNPTR r;
67
68 if ((fi->state >= fi->fsm->state_count) ||
69 (event >= fi->fsm->event_count)) {
70 printk(KERN_ERR
71 "mISDN_FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n",
72 (long)fi->state, (long)fi->fsm->state_count, event,
73 (long)fi->fsm->event_count);
74 return 1;
75 }
76 r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state];
77 if (r) {
78 if (fi->debug)
79 fi->printdebug(fi, "State %s Event %s",
80 fi->fsm->strState[fi->state],
81 fi->fsm->strEvent[event]);
82 r(fi, event, arg);
83 return 0;
84 } else {
85 if (fi->debug)
86 fi->printdebug(fi, "State %s Event %s no action",
87 fi->fsm->strState[fi->state],
88 fi->fsm->strEvent[event]);
89 return 1;
90 }
91}
92EXPORT_SYMBOL(mISDN_FsmEvent);
93
94void
95mISDN_FsmChangeState(struct FsmInst *fi, int newstate)
96{
97 fi->state = newstate;
98 if (fi->debug)
99 fi->printdebug(fi, "ChangeState %s",
100 fi->fsm->strState[newstate]);
101}
102EXPORT_SYMBOL(mISDN_FsmChangeState);
103
104static void
105FsmExpireTimer(struct timer_list *t)
106{
107 struct FsmTimer *ft = from_timer(ft, t, tl);
108#if FSM_TIMER_DEBUG
109 if (ft->fi->debug)
110 ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft);
111#endif
112 mISDN_FsmEvent(ft->fi, ft->event, ft->arg);
113}
114
115void
116mISDN_FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft)
117{
118 ft->fi = fi;
119#if FSM_TIMER_DEBUG
120 if (ft->fi->debug)
121 ft->fi->printdebug(ft->fi, "mISDN_FsmInitTimer %lx", (long) ft);
122#endif
123 timer_setup(&ft->tl, FsmExpireTimer, 0);
124}
125EXPORT_SYMBOL(mISDN_FsmInitTimer);
126
127void
128mISDN_FsmDelTimer(struct FsmTimer *ft, int where)
129{
130#if FSM_TIMER_DEBUG
131 if (ft->fi->debug)
132 ft->fi->printdebug(ft->fi, "mISDN_FsmDelTimer %lx %d",
133 (long) ft, where);
134#endif
135 del_timer(&ft->tl);
136}
137EXPORT_SYMBOL(mISDN_FsmDelTimer);
138
139int
140mISDN_FsmAddTimer(struct FsmTimer *ft,
141 int millisec, int event, void *arg, int where)
142{
143
144#if FSM_TIMER_DEBUG
145 if (ft->fi->debug)
146 ft->fi->printdebug(ft->fi, "mISDN_FsmAddTimer %lx %d %d",
147 (long) ft, millisec, where);
148#endif
149
150 if (timer_pending(&ft->tl)) {
151 if (ft->fi->debug) {
152 printk(KERN_WARNING
153 "mISDN_FsmAddTimer: timer already active!\n");
154 ft->fi->printdebug(ft->fi,
155 "mISDN_FsmAddTimer already active!");
156 }
157 return -1;
158 }
159 ft->event = event;
160 ft->arg = arg;
161 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
162 add_timer(&ft->tl);
163 return 0;
164}
165EXPORT_SYMBOL(mISDN_FsmAddTimer);
166
167void
168mISDN_FsmRestartTimer(struct FsmTimer *ft,
169 int millisec, int event, void *arg, int where)
170{
171
172#if FSM_TIMER_DEBUG
173 if (ft->fi->debug)
174 ft->fi->printdebug(ft->fi, "mISDN_FsmRestartTimer %lx %d %d",
175 (long) ft, millisec, where);
176#endif
177
178 if (timer_pending(&ft->tl))
179 del_timer(&ft->tl);
180 ft->event = event;
181 ft->arg = arg;
182 ft->tl.expires = jiffies + (millisec * HZ) / 1000;
183 add_timer(&ft->tl);
184}
185EXPORT_SYMBOL(mISDN_FsmRestartTimer);
186
