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 <error.h>
19#include <pthread.h>
20#include <stdio.h>
21#include <stdlib.h>
22
23
24static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
25static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
26
27
28static void *
29tf (void *p)
30{
31 int err;
32
33 err = pthread_mutex_lock (mutex: &mut);
34 if (err != 0)
35 error (EXIT_FAILURE, errnum: err, format: "child: cannot get mutex");
36
37 puts (s: "child: got mutex; signalling");
38
39 pthread_cond_signal (cond: &cond);
40
41 puts (s: "child: unlock");
42
43 err = pthread_mutex_unlock (mutex: &mut);
44 if (err != 0)
45 error (EXIT_FAILURE, errnum: err, format: "child: cannot unlock");
46
47 puts (s: "child: done");
48
49 return NULL;
50}
51
52
53static int
54do_test (void)
55{
56 pthread_t th;
57 int err;
58
59 printf (format: "&cond = %p\n&mut = %p\n", &cond, &mut);
60
61 puts (s: "parent: get mutex");
62
63 err = pthread_mutex_lock (mutex: &mut);
64 if (err != 0)
65 error (EXIT_FAILURE, errnum: err, format: "parent: cannot get mutex");
66
67 puts (s: "parent: create child");
68
69 err = pthread_create (newthread: &th, NULL, start_routine: tf, NULL);
70 if (err != 0)
71 error (EXIT_FAILURE, errnum: err, format: "parent: cannot create thread");
72
73 puts (s: "parent: wait for condition");
74
75 /* This test will fail on spurious wake-ups, which are allowed; however,
76 the current implementation shouldn't produce spurious wake-ups in the
77 scenario we are testing here. */
78 err = pthread_cond_wait (cond: &cond, mutex: &mut);
79 if (err != 0)
80 error (EXIT_FAILURE, errnum: err, format: "parent: cannot wait fir signal");
81
82 puts (s: "parent: got signal");
83
84 err = pthread_join (th: th, NULL);
85 if (err != 0)
86 error (EXIT_FAILURE, errnum: err, format: "parent: failed to join");
87
88 puts (s: "done");
89
90 return 0;
91}
92
93
94#define TEST_FUNCTION do_test ()
95#include "../test-skeleton.c"
96

source code of glibc/sysdeps/pthread/tst-cond1.c