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 <errno.h> |
19 | #include <pthread.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <unistd.h> |
24 | #include <sys/time.h> |
25 | |
26 | |
27 | static pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
28 | static pthread_mutex_t mut = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; |
29 | static pthread_mutex_t mut2 = PTHREAD_MUTEX_INITIALIZER; |
30 | |
31 | static void * |
32 | tf (void *p) |
33 | { |
34 | if (pthread_mutex_lock (mutex: &mut) != 0) |
35 | { |
36 | printf (format: "%s: 1st mutex_lock failed\n" , __func__); |
37 | exit (1); |
38 | } |
39 | if (pthread_mutex_lock (mutex: &mut) != 0) |
40 | { |
41 | printf (format: "%s: 2nd mutex_lock failed\n" , __func__); |
42 | exit (1); |
43 | } |
44 | if (pthread_mutex_lock (mutex: &mut) != 0) |
45 | { |
46 | printf (format: "%s: 3rd mutex_lock failed\n" , __func__); |
47 | exit (1); |
48 | } |
49 | |
50 | if (pthread_mutex_unlock (mutex: &mut2) != 0) |
51 | { |
52 | printf (format: "%s: mutex_unlock failed\n" , __func__); |
53 | exit (1); |
54 | } |
55 | |
56 | struct timeval tv; |
57 | gettimeofday (tv: &tv, NULL); |
58 | struct timespec ts; |
59 | TIMEVAL_TO_TIMESPEC (&tv, &ts); |
60 | ts.tv_sec += p == NULL ? 100 : 1; |
61 | |
62 | int err = pthread_cond_timedwait (cond: &cond, mutex: &mut, abstime: &ts); |
63 | if ((err != 0 && p == NULL) || (err != ETIMEDOUT && p != NULL)) |
64 | { |
65 | printf (format: "%s: cond_wait failed\n" , __func__); |
66 | exit (1); |
67 | } |
68 | |
69 | if (pthread_mutex_unlock (mutex: &mut) != 0) |
70 | { |
71 | printf (format: "%s: 1st mutex_unlock failed\n" , __func__); |
72 | exit (1); |
73 | } |
74 | if (pthread_mutex_unlock (mutex: &mut) != 0) |
75 | { |
76 | printf (format: "%s: 2nd mutex_unlock failed\n" , __func__); |
77 | exit (1); |
78 | } |
79 | if (pthread_mutex_unlock (mutex: &mut) != 0) |
80 | { |
81 | printf (format: "%s: 3rd mutex_unlock failed\n" , __func__); |
82 | exit (1); |
83 | } |
84 | |
85 | puts (s: "child: done" ); |
86 | |
87 | return NULL; |
88 | } |
89 | |
90 | |
91 | static int |
92 | do_test (void) |
93 | { |
94 | if (pthread_mutex_lock (mutex: &mut2) != 0) |
95 | { |
96 | puts (s: "1st mutex_lock failed" ); |
97 | return 1; |
98 | } |
99 | |
100 | puts (s: "parent: create 1st child" ); |
101 | |
102 | pthread_t th; |
103 | int err = pthread_create (newthread: &th, NULL, start_routine: tf, NULL); |
104 | if (err != 0) |
105 | { |
106 | printf (format: "parent: cannot 1st create thread: %s\n" , strerror (errnum: err)); |
107 | return 1; |
108 | } |
109 | |
110 | /* We have to synchronize with the child. */ |
111 | if (pthread_mutex_lock (mutex: &mut2) != 0) |
112 | { |
113 | puts (s: "2nd mutex_lock failed" ); |
114 | return 1; |
115 | } |
116 | |
117 | /* Give the child to reach to pthread_cond_wait. */ |
118 | sleep (seconds: 1); |
119 | |
120 | if (pthread_cond_signal (cond: &cond) != 0) |
121 | { |
122 | puts (s: "cond_signal failed" ); |
123 | return 1; |
124 | } |
125 | |
126 | err = pthread_join (th: th, NULL); |
127 | if (err != 0) |
128 | { |
129 | printf (format: "parent: failed to join: %s\n" , strerror (errnum: err)); |
130 | return 1; |
131 | } |
132 | |
133 | |
134 | puts (s: "parent: create 2nd child" ); |
135 | |
136 | err = pthread_create (newthread: &th, NULL, start_routine: tf, arg: (void *) 1l); |
137 | if (err != 0) |
138 | { |
139 | printf (format: "parent: cannot 2nd create thread: %s\n" , strerror (errnum: err)); |
140 | return 1; |
141 | } |
142 | |
143 | err = pthread_join (th: th, NULL); |
144 | if (err != 0) |
145 | { |
146 | printf (format: "parent: failed to join: %s\n" , strerror (errnum: err)); |
147 | return 1; |
148 | } |
149 | |
150 | puts (s: "done" ); |
151 | |
152 | return 0; |
153 | } |
154 | |
155 | |
156 | #define TEST_FUNCTION do_test () |
157 | #include "../test-skeleton.c" |
158 | |