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
|
/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* a simple getitimer/setitimer based on our oskit_clock COM sys_clock
*/
#include <sys/types.h>
#include <sys/time.h>
#include <signal.h>
#include <string.h>
#include <oskit/c/errno.h>
#include <oskit/time.h>
#include <oskit/dev/clock.h>
#include <oskit/com/listener.h>
#include <oskit/dev/timer.h>
#include "posix.h"
static oskit_timer_t *itimer;
extern oskit_clock_t *sys_clock;
#ifdef THREAD_SAFE
/*
* Deliver the signal to the thread that requested the setitimer. This
* is probably the wrong thing to do, but sending a kill() also seems wrong
* since that would cause the alarm to be received in every thread. In fact
* using setitimer in a multithreaded application seems wrong to begin with.
*/
#include <oskit/threads/pthread.h>
static pthread_t setitimer_self;
#endif
/* ARGSUSED */
static int
handler(oskit_iunknown_t *obj, void *arg)
{
#ifdef THREAD_SAFE
return pthread_kill(setitimer_self, SIGALRM);
#else
return kill(0, SIGALRM);
#endif
}
/*
* get the interval timer
*/
int
getitimer(int which, struct itimerval *value)
{
oskit_itimerspec_t it;
if (which != ITIMER_REAL)
return errno = EINVAL, -1;
if (!itimer) {
memset(value, 0, sizeof *value);
return 0;
}
oskit_timer_gettime(itimer, &it);
TIMESPEC_TO_TIMEVAL(&value->it_interval, &it.it_interval);
TIMESPEC_TO_TIMEVAL(&value->it_value, &it.it_value);
return 0;
}
/*
* set the interval timer
*/
int
setitimer(int which, struct itimerval *value, struct itimerval *ovalue)
{
oskit_itimerspec_t it;
if (which != ITIMER_REAL)
return errno = EINVAL, -1;
if (!itimer) {
oskit_listener_t *l;
if (!sys_clock && !posixlib_clock_init())
return errno = ENXIO, -1;
oskit_clock_createtimer(sys_clock, &itimer);
oskit_timer_setlistener(itimer,
l = oskit_create_listener(handler, 0));
oskit_listener_release(l);
}
TIMEVAL_TO_TIMESPEC(&value->it_interval, &it.it_interval)
TIMEVAL_TO_TIMESPEC(&value->it_value, &it.it_value)
#ifdef THREAD_SAFE
setitimer_self = pthread_self();
#endif
oskit_timer_settime(itimer, 0, &it);
return 0;
}
|
