1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
* PPP Timer Processing Module
*
* Written by Toshiharu OHNO (tony-o@iij.ad.jp)
*
* Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the Internet Initiative Japan, Inc. The name of the
* IIJ may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* $Id:$
*
* TODO:
*/
#include "defs.h"
#include <sys/time.h>
#include <signal.h>
#include "timeout.h"
void
StartTimer(tp)
struct pppTimer *tp;
{
struct pppTimer *t, *pt;
u_long ticks = 0;
if (tp->state == TIMER_RUNNING) {
StopTimer(tp);
}
if (tp->load == 0) {
#ifdef DEBUG
logprintf("timer %x has 0 load!\n", tp);
#endif
return;
}
pt = NULL;
for (t = TimerList; t; t = t->next) {
#ifdef DEBUG
logprintf("%x(%d): ticks: %d, rest: %d\n", t, t->state, ticks, t->rest);
#endif
if (ticks + t->rest >= tp->load)
break;
ticks += t->rest;
pt = t;
}
tp->state = TIMER_RUNNING;
tp->rest = tp->load - ticks;
#ifdef DEBUG
logprintf("Inserting %x before %x, rest = %d\n", tp, t, tp->rest);
#endif
/* Insert given *tp just before *t */
tp->next = t;
if (pt) {
pt->next = tp;
} else
TimerList = tp;
if (t)
t->rest -= tp->rest;
}
void
StopTimer(tp)
struct pppTimer *tp;
{
struct pppTimer *t, *pt;
if (tp->state != TIMER_RUNNING) {
tp->next = NULL;
return;
}
#ifdef DEBUG
logprintf("StopTimer: %x, next = %x\n", tp, tp->next);
#endif
pt = NULL;
for (t = TimerList; t != tp; t = t->next)
pt = t;
if (t) {
if (pt)
pt->next = t->next;
else
TimerList = t->next;
if (t->next)
t->next->rest += tp->rest;
} else
fprintf(stderr, "Oops, timer not found!!\n");
tp->next = NULL;
tp->state = TIMER_STOPPED;
}
void
TimerService()
{
struct pppTimer *tp, *exp, *wt;
if (tp = TimerList) {
tp->rest--;
if (tp->rest == 0) {
/*
* Multiple timers may expires at once. Create list of expired timers.
*/
exp = NULL;
do {
tp->state = TIMER_EXPIRED;
wt = tp->next;
tp->enext = exp;
exp = tp;
#ifdef DEBUG
logprintf("Add %x to exp\n", tp);
#endif
tp = wt;
} while (tp && (tp->rest == 0));
TimerList = tp;
#ifdef DEBUG
logprintf("TimerService: next is %x(%d)\n",
TimerList, TimerList? TimerList->rest : 0);
#endif
/*
* Process all expired timers.
*/
while (exp) {
#ifdef notdef
StopTimer(exp);
#endif
if (exp->func)
(*exp->func)(exp->arg);
exp = exp->enext;
}
}
}
}
void
ShowTimers()
{
struct pppTimer *pt;
for (pt = TimerList; pt; pt = pt->next)
fprintf(stderr, "%x: load = %d, rest = %d\r\n", pt, pt->load, pt->rest);
}
|
