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1da177e4 LT |
1 | /* $Id: fsm.c,v 1.14.6.4 2001/09/23 22:24:47 kai Exp $ |
2 | * | |
3 | * Finite state machine | |
4 | * | |
5 | * Author Karsten Keil | |
6 | * Copyright by Karsten Keil <keil@isdn4linux.de> | |
7 | * by Kai Germaschewski <kai.germaschewski@gmx.de> | |
8 | * | |
9 | * This software may be used and distributed according to the terms | |
10 | * of the GNU General Public License, incorporated herein by reference. | |
11 | * | |
12 | * Thanks to Jan den Ouden | |
13 | * Fritz Elfert | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
5a0e3ad6 | 18 | #include <linux/slab.h> |
1da177e4 LT |
19 | #include <linux/init.h> |
20 | #include "hisax.h" | |
21 | ||
22 | #define FSM_TIMER_DEBUG 0 | |
23 | ||
24 | int | |
25 | FsmNew(struct Fsm *fsm, struct FsmNode *fnlist, int fncount) | |
26 | { | |
27 | int i; | |
28 | ||
29 | fsm->jumpmatrix = (FSMFNPTR *) | |
41f96935 | 30 | kzalloc(sizeof (FSMFNPTR) * fsm->state_count * fsm->event_count, GFP_KERNEL); |
1da177e4 LT |
31 | if (!fsm->jumpmatrix) |
32 | return -ENOMEM; | |
33 | ||
1da177e4 LT |
34 | for (i = 0; i < fncount; i++) |
35 | if ((fnlist[i].state>=fsm->state_count) || (fnlist[i].event>=fsm->event_count)) { | |
36 | printk(KERN_ERR "FsmNew Error line %d st(%ld/%ld) ev(%ld/%ld)\n", | |
37 | i,(long)fnlist[i].state,(long)fsm->state_count, | |
38 | (long)fnlist[i].event,(long)fsm->event_count); | |
39 | } else | |
40 | fsm->jumpmatrix[fsm->state_count * fnlist[i].event + | |
41 | fnlist[i].state] = (FSMFNPTR) fnlist[i].routine; | |
42 | return 0; | |
43 | } | |
44 | ||
45 | void | |
46 | FsmFree(struct Fsm *fsm) | |
47 | { | |
48 | kfree((void *) fsm->jumpmatrix); | |
49 | } | |
50 | ||
51 | int | |
52 | FsmEvent(struct FsmInst *fi, int event, void *arg) | |
53 | { | |
54 | FSMFNPTR r; | |
55 | ||
56 | if ((fi->state>=fi->fsm->state_count) || (event >= fi->fsm->event_count)) { | |
57 | printk(KERN_ERR "FsmEvent Error st(%ld/%ld) ev(%d/%ld)\n", | |
58 | (long)fi->state,(long)fi->fsm->state_count,event,(long)fi->fsm->event_count); | |
59 | return(1); | |
60 | } | |
61 | r = fi->fsm->jumpmatrix[fi->fsm->state_count * event + fi->state]; | |
62 | if (r) { | |
63 | if (fi->debug) | |
64 | fi->printdebug(fi, "State %s Event %s", | |
65 | fi->fsm->strState[fi->state], | |
66 | fi->fsm->strEvent[event]); | |
67 | r(fi, event, arg); | |
68 | return (0); | |
69 | } else { | |
70 | if (fi->debug) | |
71 | fi->printdebug(fi, "State %s Event %s no routine", | |
72 | fi->fsm->strState[fi->state], | |
73 | fi->fsm->strEvent[event]); | |
74 | return (!0); | |
75 | } | |
76 | } | |
77 | ||
78 | void | |
79 | FsmChangeState(struct FsmInst *fi, int newstate) | |
80 | { | |
81 | fi->state = newstate; | |
82 | if (fi->debug) | |
83 | fi->printdebug(fi, "ChangeState %s", | |
84 | fi->fsm->strState[newstate]); | |
85 | } | |
86 | ||
87 | static void | |
88 | FsmExpireTimer(struct FsmTimer *ft) | |
89 | { | |
90 | #if FSM_TIMER_DEBUG | |
91 | if (ft->fi->debug) | |
92 | ft->fi->printdebug(ft->fi, "FsmExpireTimer %lx", (long) ft); | |
93 | #endif | |
94 | FsmEvent(ft->fi, ft->event, ft->arg); | |
95 | } | |
96 | ||
97 | void | |
98 | FsmInitTimer(struct FsmInst *fi, struct FsmTimer *ft) | |
99 | { | |
100 | ft->fi = fi; | |
101 | ft->tl.function = (void *) FsmExpireTimer; | |
102 | ft->tl.data = (long) ft; | |
103 | #if FSM_TIMER_DEBUG | |
104 | if (ft->fi->debug) | |
105 | ft->fi->printdebug(ft->fi, "FsmInitTimer %lx", (long) ft); | |
106 | #endif | |
107 | init_timer(&ft->tl); | |
108 | } | |
109 | ||
110 | void | |
111 | FsmDelTimer(struct FsmTimer *ft, int where) | |
112 | { | |
113 | #if FSM_TIMER_DEBUG | |
114 | if (ft->fi->debug) | |
115 | ft->fi->printdebug(ft->fi, "FsmDelTimer %lx %d", (long) ft, where); | |
116 | #endif | |
117 | del_timer(&ft->tl); | |
118 | } | |
119 | ||
120 | int | |
121 | FsmAddTimer(struct FsmTimer *ft, | |
122 | int millisec, int event, void *arg, int where) | |
123 | { | |
124 | ||
125 | #if FSM_TIMER_DEBUG | |
126 | if (ft->fi->debug) | |
127 | ft->fi->printdebug(ft->fi, "FsmAddTimer %lx %d %d", | |
128 | (long) ft, millisec, where); | |
129 | #endif | |
130 | ||
131 | if (timer_pending(&ft->tl)) { | |
132 | printk(KERN_WARNING "FsmAddTimer: timer already active!\n"); | |
133 | ft->fi->printdebug(ft->fi, "FsmAddTimer already active!"); | |
134 | return -1; | |
135 | } | |
136 | init_timer(&ft->tl); | |
137 | ft->event = event; | |
138 | ft->arg = arg; | |
139 | ft->tl.expires = jiffies + (millisec * HZ) / 1000; | |
140 | add_timer(&ft->tl); | |
141 | return 0; | |
142 | } | |
143 | ||
144 | void | |
145 | FsmRestartTimer(struct FsmTimer *ft, | |
146 | int millisec, int event, void *arg, int where) | |
147 | { | |
148 | ||
149 | #if FSM_TIMER_DEBUG | |
150 | if (ft->fi->debug) | |
151 | ft->fi->printdebug(ft->fi, "FsmRestartTimer %lx %d %d", | |
152 | (long) ft, millisec, where); | |
153 | #endif | |
154 | ||
155 | if (timer_pending(&ft->tl)) | |
156 | del_timer(&ft->tl); | |
157 | init_timer(&ft->tl); | |
158 | ft->event = event; | |
159 | ft->arg = arg; | |
160 | ft->tl.expires = jiffies + (millisec * HZ) / 1000; | |
161 | add_timer(&ft->tl); | |
162 | } |