1 | /* Copyright (C) 2004-2024 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 <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | #include <unistd.h> |
23 | |
24 | |
25 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
26 | static pthread_mutex_t mut = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; |
27 | static pthread_mutex_t mut2 = PTHREAD_MUTEX_INITIALIZER; |
28 | |
29 | static void * |
30 | tf (void *p) |
31 | { |
32 | if (pthread_mutex_lock (mutex: &mut) != 0) |
33 | { |
34 | printf (format: "%s: 1st mutex_lock failed\n" , __func__); |
35 | exit (1); |
36 | } |
37 | if (pthread_mutex_lock (mutex: &mut) != 0) |
38 | { |
39 | printf (format: "%s: 2nd mutex_lock failed\n" , __func__); |
40 | exit (1); |
41 | } |
42 | if (pthread_mutex_lock (mutex: &mut) != 0) |
43 | { |
44 | printf (format: "%s: 3rd mutex_lock failed\n" , __func__); |
45 | exit (1); |
46 | } |
47 | |
48 | if (pthread_mutex_unlock (mutex: &mut2) != 0) |
49 | { |
50 | printf (format: "%s: mutex_unlock failed\n" , __func__); |
51 | exit (1); |
52 | } |
53 | |
54 | if (pthread_cond_wait (cond: &cond, mutex: &mut) != 0) |
55 | { |
56 | printf (format: "%s: cond_wait failed\n" , __func__); |
57 | exit (1); |
58 | } |
59 | |
60 | puts (s: "child: done" ); |
61 | |
62 | return NULL; |
63 | } |
64 | |
65 | |
66 | static int |
67 | do_test (void) |
68 | { |
69 | if (pthread_mutex_lock (mutex: &mut2) != 0) |
70 | { |
71 | puts (s: "1st mutex_lock failed" ); |
72 | return 1; |
73 | } |
74 | |
75 | puts (s: "parent: create child" ); |
76 | |
77 | pthread_t th; |
78 | int err = pthread_create (newthread: &th, NULL, start_routine: tf, NULL); |
79 | if (err != 0) |
80 | { |
81 | printf (format: "parent: cannot create thread: %s\n" , strerror (errnum: err)); |
82 | return 1; |
83 | } |
84 | |
85 | /* We have to synchronize with the child. */ |
86 | if (pthread_mutex_lock (mutex: &mut2) != 0) |
87 | { |
88 | puts (s: "2nd mutex_lock failed" ); |
89 | return 1; |
90 | } |
91 | |
92 | /* Give the child to reach to pthread_cond_wait. */ |
93 | sleep (seconds: 1); |
94 | |
95 | if (pthread_cond_signal (cond: &cond) != 0) |
96 | { |
97 | puts (s: "cond_signal failed" ); |
98 | return 1; |
99 | } |
100 | |
101 | err = pthread_join (th: th, NULL); |
102 | if (err != 0) |
103 | { |
104 | printf (format: "parent: failed to join: %s\n" , strerror (errnum: err)); |
105 | return 1; |
106 | } |
107 | |
108 | puts (s: "done" ); |
109 | |
110 | return 0; |
111 | } |
112 | |
113 | |
114 | #define TEST_FUNCTION do_test () |
115 | #include "../test-skeleton.c" |
116 | |