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
|
/*
Copyright (C) (2004 - 2006) (Venkata Ramana Enaganti) <ramana@intraperson.com>
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 of the License, 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.
*/
#include <time.h>
#include <unistd.h>
/* Utility library. */
#include "msg.h"
/* Application-specific. */
#include "time_mono.h"
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
clockid_t clockid = CLOCK_REALTIME;
#endif
static int initialized = 0;
#ifdef TEST
#if 0
#ifdef _POSIX_MONOTONIC_CLOCK
#undef _POSIX_MONOTONIC_CLOCK
#endif
#ifdef _POSIX_TIMERS
#undef _POSIX_TIMERS
#endif
#endif
#endif
time_t time_mono( void )
{
const char *myname = "time_monotonic";
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
struct timespec tp;
if( clock_gettime( clockid, &tp ) )
msglog( MSG_FATAL|LOG_ERRNO,
"%s: clock_gettime failed", myname );
return tp.tv_sec;
#else
#warning "time_mono using time() interface"
return time( NULL );
#endif
}
/*For use with pthread_cond_timedwait*/
struct timespec *thread_cond_timespec( struct timespec *tp, time_t sec )
{
#if defined _POSIX_CLOCK_SELECTION && _POSIX_CLOCK_SELECTION >= 0 \
&& defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
if ( clock_gettime( clockid, tp ) )
msglog( MSG_FATAL|LOG_ERRNO, "thread_cond_timespec: " \
"clock_gettime failed" );
#else
#warning "not using _POSIX_CLOCK_SELECTION"
tp->tv_sec = time( NULL );
tp->tv_nsec = 0;
#endif
tp->tv_sec += sec;
return tp;
}
#if 0
struct timespec *mono_timespec( struct timespec *tp, time_t sec, long nsec )
{
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
#if defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK >= 0)
if ( clock_gettime( clockid, tp ) )
msglog( MSG_FATAL|LOG_ERRNO,
"mono_timespec: clock_gettime failed" );
#else
if ( clock_gettime( CLOCK_REALTIME, tp ) )
msglog( MSG_FATAL|LOG_ERRNO,
"mono_timespec: clock_gettime failed" );
#endif
#else
tp->tv_sec = time( NULL );
tp->tv_nsec = 0;
#endif
tp->tv_sec += sec;
tp->tv_nsec += nsec;
return tp;
}
#endif
void mono_nanosleep( long nsec )
{
struct timespec tp;
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0)
tp.tv_sec = 0;
tp.tv_nsec = nsec;
if( clock_nanosleep( clockid, 0, &tp, NULL ) )
msglog( MSG_ERR|LOG_ERRNO,
"mono_nanosleep: clock_nanosleep" );
return;
#else
tp.tv_sec = 0;
tp.tv_nsec = nsec;
if( nanosleep( &tp, NULL ) )
msglog( MSG_ERR|LOG_ERRNO, "mono_nanosleep: nanosleep" );
#endif
}
void time_mono_init(void)
{
if( initialized )
return;
#if defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && \
defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK >= 0)
if( sysconf( _SC_MONOTONIC_CLOCK ) > 0 )
clockid = CLOCK_MONOTONIC;
#else
#warning "CLOCK_MONOTONIC not available. using CLOCK_REALTIME"
#endif
/*call for the first time to see any fatal errors*/
time_mono();
initialized = 1;
}
#ifdef TEST
#include "thread.h"
char *autodir_name(void)
{
return "test autodir";
}
int main(void)
{
int i;
pthread_mutex_t lock;
pthread_cond_t cond;
struct timespec tspec;
thread_init();
time_mono_init();
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
sleep(1);
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
printf("time_mono %ld\n", (long) time_mono());
thread_mutex_init(&lock);
thread_cond_init(&cond);
thread_cond_timespec(&tspec, 10);
pthread_mutex_lock(&lock);
printf("pthread_cond_timedwait next %ld\n", time_mono());
pthread_cond_timedwait(&cond, &lock, &tspec);
printf("pthread_cond_timedwait end %ld\n", time_mono());
printf("mono_nanosleep next %ld\n", time_mono());
for( i = 0 ; i < 1000; i++) {
mono_nanosleep(100000000);
}
printf("mono_nanosleep end %ld\n", time_mono());
}
#endif
|
