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1/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <error.h>
20#include <pthread.h>
21#include <stdio.h>
22#include <stdlib.h>
23
24
25static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
26static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
27
28static pthread_barrier_t bar;
29
30
31static void *
32tf (void *a)
33{
34 int i = (long int) a;
35 int err;
36
37 printf ("child %d: lock\n", i);
38
39 err = pthread_mutex_lock (&mut);
40 if (err != 0)
41 error (EXIT_FAILURE, err, "locking in child failed");
42
43 printf ("child %d: sync\n", i);
44
45 int e = pthread_barrier_wait (&bar);
46 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
47 {
48 puts ("child: barrier_wait failed");
49 exit (1);
50 }
51
52 printf ("child %d: wait\n", i);
53
54 err = pthread_cond_wait (&cond, &mut);
55 if (err != 0)
56 error (EXIT_FAILURE, err, "child %d: failed to wait", i);
57
58 printf ("child %d: woken up\n", i);
59
60 err = pthread_mutex_unlock (&mut);
61 if (err != 0)
62 error (EXIT_FAILURE, err, "child %d: unlock[2] failed", i);
63
64 printf ("child %d: done\n", i);
65
66 return NULL;
67}
68
69
70#define N 10
71
72
73static int
74do_test (void)
75{
76 pthread_t th[N];
77 int i;
78 int err;
79
80 printf ("&cond = %p\n&mut = %p\n", &cond, &mut);
81
82 if (pthread_barrier_init (&bar, NULL, 2) != 0)
83 {
84 puts ("barrier_init failed");
85 exit (1);
86 }
87
88 pthread_attr_t at;
89
90 if (pthread_attr_init (&at) != 0)
91 {
92 puts ("attr_init failed");
93 return 1;
94 }
95
96 if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
97 {
98 puts ("attr_setstacksize failed");
99 return 1;
100 }
101
102 for (i = 0; i < N; ++i)
103 {
104 printf ("create thread %d\n", i);
105
106 err = pthread_create (&th[i], &at, tf, (void *) (long int) i);
107 if (err != 0)
108 error (EXIT_FAILURE, err, "cannot create thread %d", i);
109
110 printf ("wait for child %d\n", i);
111
112 /* Wait for the child to start up and get the mutex for the
113 conditional variable. */
114 int e = pthread_barrier_wait (&bar);
115 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
116 {
117 puts ("barrier_wait failed");
118 exit (1);
119 }
120 }
121
122 if (pthread_attr_destroy (&at) != 0)
123 {
124 puts ("attr_destroy failed");
125 return 1;
126 }
127
128 puts ("get lock outselves");
129
130 err = pthread_mutex_lock (&mut);
131 if (err != 0)
132 error (EXIT_FAILURE, err, "mut locking failed");
133
134 puts ("broadcast");
135
136 /* Wake up all threads. */
137 err = pthread_cond_broadcast (&cond);
138 if (err != 0)
139 error (EXIT_FAILURE, err, "parent: broadcast failed");
140
141 err = pthread_mutex_unlock (&mut);
142 if (err != 0)
143 error (EXIT_FAILURE, err, "mut unlocking failed");
144
145 /* Join all threads. */
146 for (i = 0; i < N; ++i)
147 {
148 printf ("join thread %d\n", i);
149
150 err = pthread_join (th[i], NULL);
151 if (err != 0)
152 error (EXIT_FAILURE, err, "join of child %d failed", i);
153 }
154
155 puts ("done");
156
157 return 0;
158}
159
160
161#define TEST_FUNCTION do_test ()
162#include "../test-skeleton.c"
163

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