1/* Copyright (C) 2002-2024 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <pthread.h>
19#include <signal.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <unistd.h>
23
24static int do_test (void);
25
26#define TEST_FUNCTION do_test ()
27#include "../test-skeleton.c"
28
29static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
30static pthread_rwlock_t r;
31
32
33static void *
34tf (void *arg)
35{
36 if (pthread_rwlock_wrlock (rwlock: &r) == 0)
37 {
38 puts (s: "child: rwlock_wrlock succeeded");
39 exit (1);
40 }
41
42 puts (s: "child: rwlock_wrlock returned");
43
44 exit (1);
45}
46
47
48static int
49do_test (void)
50{
51 pthread_t th;
52
53 if (pthread_rwlock_init (rwlock: &r, NULL) != 0)
54 {
55 puts (s: "rwlock_init failed");
56 return 1;
57 }
58
59 if (pthread_rwlock_wrlock (rwlock: &r) != 0)
60 {
61 puts (s: "rwlock_wrlock failed");
62 return 1;
63 }
64
65 if (pthread_mutex_lock (mutex: &m) != 0)
66 {
67 puts (s: "mutex_lock failed");
68 return 1;
69 }
70
71 if (pthread_create (newthread: &th, NULL, start_routine: tf, NULL) != 0)
72 {
73 puts (s: "create failed");
74 return 1;
75 }
76
77 delayed_exit (seconds: 1);
78 /* This call should never return. */
79 xpthread_mutex_lock (mutex: &m);
80
81 puts (s: "2nd mutex_lock returned");
82 return 1;
83}
84

source code of glibc/sysdeps/pthread/tst-rwlock5.c