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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* $Id: timer.c,v 1.6 2004/03/03 04:44:16 reinelt Exp $
*
* generic timer handling
*
* Copyright 2003,2004 Michael Reinelt <reinelt@eunet.at>
* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: timer.c,v $
* Revision 1.6 2004/03/03 04:44:16 reinelt
* changes (cosmetics?) to the big patch from Martin
* hash patch un-applied
*
* Revision 1.5 2004/03/03 03:47:04 reinelt
* big patch from Martin Hejl:
* - use qprintf() where appropriate
* - save CPU cycles on gettimeofday()
* - add quit() functions to free allocated memory
* - fixed lots of memory leaks
*
* Revision 1.4 2004/01/30 20:57:56 reinelt
* HD44780 patch from Martin Hejl
* dmalloc integrated
*
* Revision 1.3 2004/01/29 04:40:03 reinelt
* every .c file includes "config.h" now
*
* Revision 1.2 2004/01/18 09:01:45 reinelt
* /proc/stat parsing finished
*
* Revision 1.1 2004/01/13 08:18:20 reinelt
* timer queues added
* liblcd4linux deactivated turing transformation to new layout
*
*/
/*
* exported functions:
*
* int timer_junk(void)
* Fixme: document me :-(
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include "debug.h"
#include "cfg.h"
#include "timer.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
typedef struct TIMER {
void (*callback)(void *data);
void *data;
struct timeval when;
int interval;
int one_shot;
int active;
} TIMER;
TIMER *Timers=NULL;
int nTimers=0;
static void timer_inc (struct timeval *tv, int msec)
{
tv->tv_sec += msec / 1000;
tv->tv_usec += (msec - 1000*(msec/1000)) * 1000;
if (tv->tv_usec >= 1000000) {
tv->tv_usec -= 1000000;
tv->tv_sec++;
}
}
int timer_add (void (*callback)(void *data), void *data, int interval, int one_shot)
{
int i;
struct timeval now;
gettimeofday(&now, NULL);
// find a free slot
for (i=0; i<nTimers; i++) {
if (Timers[i].active==0) break;
}
// none found, allocate a new slot
if (i>=nTimers) {
nTimers++;
Timers=realloc(Timers, nTimers*sizeof(*Timers));
}
// fill slot
Timers[i].callback = callback;
Timers[i].data = data;
Timers[i].when = now;
Timers[i].interval = interval;
Timers[i].one_shot = one_shot;
Timers[i].active = 1;
// if one-shot timer, don't fire now
if (one_shot) {
timer_inc (&Timers[i].when, interval);
}
return 0;
}
int timer_process (struct timespec *delay)
{
int i, flag, min;
struct timeval now;
// the current moment
gettimeofday(&now, NULL);
// sanity check
if (nTimers==0) {
error ("huh? not one single timer to process? dazed and confused...");
return -1;
}
// process expired timers
flag=0;
for (i=0; i<nTimers; i++) {
if (Timers[i].active == 0) continue;
if (timercmp(&Timers[i].when, &now, <=)) {
flag=1;
// callback
if (Timers[i].callback!=NULL) {
Timers[i].callback(Timers[i].data);
}
// respawn or delete timer
if (Timers[i].one_shot) {
Timers[i].active=0;
} else {
Timers[i].when=now;
timer_inc (&Timers[i].when, Timers[i].interval);
}
}
}
// find next timer
flag=1;
min=-1;
for (i=0; i<nTimers; i++) {
if (Timers[i].active == 0) continue;
if (flag || timercmp(&Timers[i].when, &Timers[min].when, <)) {
flag=0;
min=i;
}
}
if (min<0) {
error ("huh? not one single timer left? dazed and confused...");
return -1;
}
// delay until next timer event
delay->tv_sec = Timers[min].when.tv_sec - now.tv_sec;
delay->tv_nsec = Timers[min].when.tv_usec - now.tv_usec;
if (delay->tv_nsec<0) {
delay->tv_sec--;
delay->tv_nsec += 1000000;
}
// nanoseconds!!
delay->tv_nsec *= 1000;
return 0;
}
void timer_exit(void) {
nTimers=0;
if (Timers>0) {
free(Timers);;
Timers=NULL;
}
}
|
