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
|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "lint.h"
#include <time.h>
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "sigev_thread.h"
/*
* System call wrappers found elsewhere in libc (common/sys/__clock_timer.s).
*/
extern int __clock_getres(clockid_t, timespec_t *);
extern int __clock_gettime(clockid_t, timespec_t *);
extern int __clock_settime(clockid_t, const timespec_t *);
extern int __timer_create(clockid_t, struct sigevent *, timer_t *);
extern int __timer_delete(timer_t);
extern int __timer_getoverrun(timer_t);
extern int __timer_gettime(timer_t, itimerspec_t *);
extern int __timer_settime(timer_t, int, const itimerspec_t *, itimerspec_t *);
/*
* Array of pointers to tcd's, indexed by timer id.
* No more than 'timer_max' timers can be created by any process.
*/
int timer_max = 0;
thread_communication_data_t **timer_tcd;
static pthread_once_t timer_once = PTHREAD_ONCE_INIT;
static void
timer_init(void)
{
timer_max = (int)_sysconf(_SC_TIMER_MAX);
timer_tcd = malloc(timer_max * sizeof (*timer_tcd));
(void) memset(timer_tcd, 0, timer_max * sizeof (*timer_tcd));
}
int
clock_getres(clockid_t clock_id, timespec_t *res)
{
return (__clock_getres(clock_id, res));
}
int
clock_gettime(clockid_t clock_id, timespec_t *tp)
{
return (__clock_gettime(clock_id, tp));
}
int
clock_settime(clockid_t clock_id, const timespec_t *tp)
{
return (__clock_settime(clock_id, tp));
}
int
timer_create(clockid_t clock_id, struct sigevent *sigevp, timer_t *timerid)
{
struct sigevent sigevent;
port_notify_t port_notify;
thread_communication_data_t *tcdp;
int sigev_thread = 0;
int rc;
(void) pthread_once(&timer_once, timer_init);
if (sigevp != NULL &&
sigevp->sigev_notify == SIGEV_THREAD &&
sigevp->sigev_notify_function != NULL) {
sigev_thread = 1;
tcdp = setup_sigev_handler(sigevp, TIMER);
if (tcdp == NULL)
return (-1);
/* copy the sigevent structure so we can modify it */
sigevent = *sigevp;
sigevp = &sigevent;
port_notify.portnfy_port = tcdp->tcd_port;
port_notify.portnfy_user = NULL;
sigevp->sigev_value.sival_ptr = &port_notify;
}
rc = __timer_create(clock_id, sigevp, timerid);
if (sigev_thread) {
if (rc == 0) {
if ((rc = launch_spawner(tcdp)) != 0)
(void) __timer_delete(*timerid);
else
timer_tcd[*timerid] = tcdp;
}
if (rc != 0)
free_sigev_handler(tcdp);
}
return (rc);
}
int
timer_delete(timer_t timerid)
{
int rc;
if ((rc = del_sigev_timer(timerid)) == 0)
return (__timer_delete(timerid));
else
return (rc);
}
int
timer_getoverrun(timer_t timerid)
{
return (__timer_getoverrun(timerid) + sigev_timer_getoverrun(timerid));
}
int
timer_gettime(timer_t timerid, itimerspec_t *value)
{
return (__timer_gettime(timerid, value));
}
int
timer_settime(timer_t timerid, int flags, const itimerspec_t *value,
itimerspec_t *ovalue)
{
return (__timer_settime(timerid, flags, value, ovalue));
}
/*
* Cleanup after fork1() in the child process.
*/
void
postfork1_child_sigev_timer(void)
{
thread_communication_data_t *tcdp;
int timer;
for (timer = 0; timer < timer_max; timer++) {
if ((tcdp = timer_tcd[timer]) != NULL) {
timer_tcd[timer] = NULL;
tcd_teardown(tcdp);
}
}
}
|
