1/* Copyright (C) 2003-2024 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 <stdbool.h>
21#include <stdio.h>
22#include <stdlib.h>
23
24
25#define N 10
26#define ROUNDS 100
27
28static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
29static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
30static pthread_barrier_t bN1;
31static pthread_barrier_t b2;
32
33
34static void *
35tf (void *p)
36{
37 if (pthread_mutex_lock (mutex: &mut) != 0)
38 {
39 puts (s: "child: 1st mutex_lock failed");
40 exit (1);
41 }
42
43 int e = pthread_barrier_wait (barrier: &b2);
44 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
45 {
46 puts (s: "child: 1st barrier_wait failed");
47 exit (1);
48 }
49
50 if (pthread_cond_wait (cond: &cond, mutex: &mut) != 0)
51 {
52 puts (s: "child: cond_wait failed");
53 exit (1);
54 }
55
56 if (pthread_mutex_unlock (mutex: &mut) != 0)
57 {
58 puts (s: "child: mutex_unlock failed");
59 exit (1);
60 }
61
62 e = pthread_barrier_wait (barrier: &bN1);
63 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
64 {
65 puts (s: "child: 2nd barrier_wait failed");
66 exit (1);
67 }
68
69 return NULL;
70}
71
72
73static int
74do_test (void)
75{
76 if (pthread_barrier_init (barrier: &bN1, NULL, N + 1) != 0)
77 {
78 puts (s: "barrier_init failed");
79 exit (1);
80 }
81
82 if (pthread_barrier_init (barrier: &b2, NULL, count: 2) != 0)
83 {
84 puts (s: "barrier_init failed");
85 exit (1);
86 }
87
88 pthread_attr_t at;
89
90 if (pthread_attr_init (attr: &at) != 0)
91 {
92 puts (s: "attr_init failed");
93 return 1;
94 }
95
96 if (pthread_attr_setstacksize (attr: &at, stacksize: 1 * 1024 * 1024) != 0)
97 {
98 puts (s: "attr_setstacksize failed");
99 return 1;
100 }
101
102 int r;
103 for (r = 0; r < ROUNDS; ++r)
104 {
105 printf (format: "round %d\n", r + 1);
106
107 int i;
108 pthread_t th[N];
109 for (i = 0; i < N; ++i)
110 {
111 if (pthread_create (newthread: &th[i], attr: &at, start_routine: tf, NULL) != 0)
112 {
113 puts (s: "create failed");
114 exit (1);
115 }
116
117 int e = pthread_barrier_wait (barrier: &b2);
118 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
119 {
120 puts (s: "parent: 1st barrier_wait failed");
121 exit (1);
122 }
123 }
124
125 if (pthread_mutex_lock (mutex: &mut) != 0)
126 {
127 puts (s: "parent: mutex_lock failed");
128 exit (1);
129 }
130 if (pthread_mutex_unlock (mutex: &mut) != 0)
131 {
132 puts (s: "parent: mutex_unlock failed");
133 exit (1);
134 }
135
136 /* N single signal calls. Without locking. This tests that no
137 signal gets lost. */
138 for (i = 0; i < N; ++i)
139 if (pthread_cond_signal (cond: &cond) != 0)
140 {
141 puts (s: "cond_signal failed");
142 exit (1);
143 }
144
145 int e = pthread_barrier_wait (barrier: &bN1);
146 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
147 {
148 puts (s: "parent: 2nd barrier_wait failed");
149 exit (1);
150 }
151
152 for (i = 0; i < N; ++i)
153 if (pthread_join (th: th[i], NULL) != 0)
154 {
155 puts (s: "join failed");
156 exit (1);
157 }
158 }
159
160 if (pthread_attr_destroy (attr: &at) != 0)
161 {
162 puts (s: "attr_destroy failed");
163 return 1;
164 }
165
166 return 0;
167}
168
169
170#define TEST_FUNCTION do_test ()
171#include "../test-skeleton.c"
172

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source code of glibc/sysdeps/pthread/tst-cond10.c