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1/* Test sem_wait cancellation for contended case.
2 Copyright (C) 2003-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#include <errno.h>
21#include <pthread.h>
22#include <semaphore.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26#include <unistd.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 ("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 (&bar);
52 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
53 {
54 puts ("error: tf: 1st barrier_wait failed");
55 exit (1);
56 }
57
58 /* This call should block and be cancelable. */
59 sem_wait (&sem);
60
61 pthread_cleanup_pop (0);
62
63 return NULL;
64}
65
66
67static int
68do_test (void)
69{
70 pthread_t th;
71
72 if (pthread_barrier_init (&bar, NULL, 2) != 0)
73 {
74 puts ("error: barrier_init failed");
75 exit (1);
76 }
77
78 /* A value equal to 0 will check for contended pthread cancellation,
79 where the sem_wait operation will block. */
80 if (sem_init (&sem, 0, 0) != 0)
81 {
82 puts ("error: sem_init failed");
83 exit (1);
84 }
85
86 if (pthread_create (&th, NULL, tf, NULL) != 0)
87 {
88 puts ("error: create failed");
89 exit (1);
90 }
91
92 int e = pthread_barrier_wait (&bar);
93 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
94 {
95 puts ("error: 1st barrier_wait failed");
96 exit (1);
97 }
98
99 /* Give the child a chance to go to sleep in sem_wait. */
100 sleep (1);
101
102 /* Check whether cancellation is honored when waiting in sem_wait. */
103 if (pthread_cancel (th) != 0)
104 {
105 puts ("error: 1st cancel failed");
106 exit (1);
107 }
108
109 void *r;
110 if (pthread_join (th, &r) != 0)
111 {
112 puts ("error: join failed");
113 exit (1);
114 }
115
116 if (r != PTHREAD_CANCELED)
117 {
118 puts ("thread not canceled");
119 exit (1);
120 }
121
122 return 0;
123}
124
125
126#define TEST_FUNCTION do_test ()
127#include "../test-skeleton.c"
128

Warning: That file was not part of the compilation database. It may have many parsing errors.