1/* Tests for POSIX timer implementation.
2 Copyright (C) 2000-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If
17 not, see <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <signal.h>
21#include <stdio.h>
22#include <time.h>
23#include <unistd.h>
24#include <stdlib.h>
25#include <stdint.h>
26
27
28static void
29notify_func1 (union sigval sigval)
30{
31 puts ("notify_func1");
32}
33
34
35static void
36notify_func2 (union sigval sigval)
37{
38 puts ("notify_func2");
39}
40
41
42static void
43signal_func (int sig)
44{
45 static const char text[] = "signal_func\n";
46 signal (sig, signal_func);
47 write (STDOUT_FILENO, text, sizeof text - 1);
48}
49
50static void
51intr_sleep (int sec)
52{
53 struct timespec ts;
54
55 ts.tv_sec = sec;
56 ts.tv_nsec = 0;
57
58 while (nanosleep (&ts, &ts) == -1 && errno == EINTR)
59 ;
60}
61
62#define ZSIGALRM 14
63
64
65int
66main (void)
67{
68 struct timespec ts;
69 timer_t timer_sig, timer_thr1, timer_thr2;
70 int retval;
71 struct sigevent sigev1 =
72 {
73 .sigev_notify = SIGEV_SIGNAL,
74 .sigev_signo = ZSIGALRM
75 };
76 struct sigevent sigev2;
77 struct itimerspec itimer1 = { { 0, 200000000 }, { 0, 200000000 } };
78 struct itimerspec itimer2 = { { 0, 100000000 }, { 0, 500000000 } };
79 struct itimerspec itimer3 = { { 0, 150000000 }, { 0, 300000000 } };
80 struct itimerspec old;
81
82 retval = clock_gettime (CLOCK_REALTIME, &ts);
83
84 sigev2.sigev_notify = SIGEV_THREAD;
85 sigev2.sigev_notify_function = notify_func1;
86 sigev2.sigev_notify_attributes = NULL;
87 /* It is unnecessary to do the following but to set a good example
88 we do it anyhow. */
89 sigev2.sigev_value.sival_ptr = NULL;
90
91 setvbuf (stdout, 0, _IOLBF, 0);
92
93 printf ("clock_gettime returned %d, timespec = { %jd, %jd }\n",
94 retval, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);
95
96 retval = clock_getres (CLOCK_REALTIME, &ts);
97
98 printf ("clock_getres returned %d, timespec = { %jd, %jd }\n",
99 retval, (intmax_t) ts.tv_sec, (intmax_t) ts.tv_nsec);
100
101 if (timer_create (CLOCK_REALTIME, &sigev1, &timer_sig) != 0)
102 {
103 printf ("timer_create for timer_sig failed: %m\n");
104 exit (1);
105 }
106 if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr1) != 0)
107 {
108 printf ("timer_create for timer_thr1 failed: %m\n");
109 exit (1);
110 }
111 sigev2.sigev_notify_function = notify_func2;
112 if (timer_create (CLOCK_REALTIME, &sigev2, &timer_thr2) != 0)
113 {
114 printf ("timer_create for timer_thr2 failed: %m\n");
115 exit (1);
116 }
117
118 if (timer_settime (timer_thr1, 0, &itimer2, &old) != 0)
119 {
120 printf ("timer_settime for timer_thr1 failed: %m\n");
121 exit (1);
122 }
123 if (timer_settime (timer_thr2, 0, &itimer3, &old) != 0)
124 {
125 printf ("timer_settime for timer_thr2 failed: %m\n");
126 exit (1);
127 }
128
129 signal (ZSIGALRM, signal_func);
130
131 if (timer_settime (timer_sig, 0, &itimer1, &old) != 0)
132 {
133 printf ("timer_settime for timer_sig failed: %m\n");
134 exit (1);
135 }
136
137 intr_sleep (3);
138
139 if (timer_delete (timer_sig) != 0)
140 {
141 printf ("timer_delete for timer_sig failed: %m\n");
142 exit (1);
143 }
144 if (timer_delete (timer_thr1) != 0)
145 {
146 printf ("timer_delete for timer_thr1 failed: %m\n");
147 exit (1);
148 }
149
150 intr_sleep (3);
151
152 if (timer_delete (timer_thr2) != 0)
153 {
154 printf ("timer_delete for timer_thr2 failed: %m\n");
155 exit (1);
156 }
157
158 return 0;
159}
160

source code of glibc/sysdeps/pthread/tst-timer.c