1/* Test sem_timedwait cancellation for uncontended case.
2 Copyright (C) 2003-2024 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
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <pthread.h>
21#include <semaphore.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25#include <unistd.h>
26#include <sys/time.h>
27
28
29static pthread_barrier_t bar;
30static sem_t sem;
31
32
33static void
34cleanup (void *arg)
35{
36 static int ncall;
37
38 if (++ncall != 1)
39 {
40 puts (s: "second call to cleanup");
41 exit (1);
42 }
43}
44
45
46static void *
47tf (void *arg)
48{
49 pthread_cleanup_push (cleanup, NULL);
50
51 int e = pthread_barrier_wait (barrier: &bar);
52 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
53 {
54 puts (s: "error: tf: 1st barrier_wait failed");
55 exit (1);
56 }
57
58 struct timeval tv;
59 (void) gettimeofday (tv: &tv, NULL);
60
61 struct timespec ts;
62 TIMEVAL_TO_TIMESPEC (&tv, &ts);
63
64 /* Timeout in 5 seconds. */
65 ts.tv_sec += 5;
66
67 /* This call should block and be cancelable. */
68 sem_timedwait (sem: &sem, abstime: &ts);
69
70 pthread_cleanup_pop (0);
71
72 return NULL;
73}
74
75
76static int
77do_test (void)
78{
79 pthread_t th;
80
81 if (pthread_barrier_init (barrier: &bar, NULL, count: 2) != 0)
82 {
83 puts (s: "error: barrier_init failed");
84 exit (1);
85 }
86
87 if (sem_init (sem: &sem, pshared: 0, value: 1) != 0)
88 {
89 puts (s: "error: sem_init failed");
90 exit (1);
91 }
92
93 if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0)
94 {
95 puts (s: "error: create failed");
96 exit (1);
97 }
98
99 /* Check whether cancellation is honored even before sem_timedwait does
100 anything. */
101 if (pthread_cancel (th: th) != 0)
102 {
103 puts (s: "error: 1st cancel failed");
104 exit (1);
105 }
106
107 int e = pthread_barrier_wait (barrier: &bar);
108 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
109 {
110 puts (s: "1st barrier_wait failed");
111 exit (1);
112 }
113
114 void *r;
115 if (pthread_join (th: th, thread_return: &r) != 0)
116 {
117 puts (s: "join failed");
118 exit (1);
119 }
120
121 if (r != PTHREAD_CANCELED)
122 {
123 puts (s: "thread not canceled");
124 exit (1);
125 }
126
127 return 0;
128}
129
130
131#define TEST_FUNCTION do_test ()
132#include "../test-skeleton.c"
133

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source code of glibc/sysdeps/pthread/tst-cancel14.c