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 <limits.h>
20#include <pthread.h>
21#include <stdbool.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <unistd.h>
25
26pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
27pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
28bool n, exiting;
29FILE *f;
30enum { count = 8 }; /* Number of worker threads. */
31
32void *
33tf (void *dummy)
34{
35 bool loop = true;
36
37 while (loop)
38 {
39 pthread_mutex_lock (mutex: &lock);
40 while (n && !exiting)
41 pthread_cond_wait (cond: &cv, mutex: &lock);
42 n = true;
43 pthread_mutex_unlock (mutex: &lock);
44
45 fputs (".", f);
46
47 pthread_mutex_lock (mutex: &lock);
48 n = false;
49 if (exiting)
50 loop = false;
51#ifdef UNLOCK_AFTER_BROADCAST
52 pthread_cond_broadcast (&cv);
53 pthread_mutex_unlock (&lock);
54#else
55 pthread_mutex_unlock (mutex: &lock);
56 pthread_cond_broadcast (cond: &cv);
57#endif
58 }
59
60 return NULL;
61}
62
63int
64do_test (void)
65{
66 f = fopen ("/dev/null", "w");
67 if (f == NULL)
68 {
69 printf (format: "couldn't open /dev/null, %m\n");
70 return 1;
71 }
72
73 pthread_t th[count];
74 pthread_attr_t attr;
75 int i, ret, sz;
76 pthread_attr_init (attr: &attr);
77 sz = sysconf (_SC_PAGESIZE);
78#ifdef PTHREAD_STACK_MIN
79 if (sz < PTHREAD_STACK_MIN)
80 sz = PTHREAD_STACK_MIN;
81#endif
82 pthread_attr_setstacksize (attr: &attr, stacksize: sz);
83 for (i = 0; i < count; ++i)
84 if ((ret = pthread_create (newthread: &th[i], attr: &attr, start_routine: tf, NULL)) != 0)
85 {
86 errno = ret;
87 printf (format: "pthread_create %d failed: %m\n", i);
88 return 1;
89 }
90
91 struct timespec ts = { .tv_sec = 20, .tv_nsec = 0 };
92 while (nanosleep (requested_time: &ts, remaining: &ts) != 0);
93
94 pthread_mutex_lock (mutex: &lock);
95 exiting = true;
96 pthread_mutex_unlock (mutex: &lock);
97
98 for (i = 0; i < count; ++i)
99 pthread_join (th: th[i], NULL);
100
101 fclose (f);
102 return 0;
103}
104
105#define TEST_FUNCTION do_test ()
106#define TIMEOUT 40
107#include "../test-skeleton.c"
108

source code of glibc/sysdeps/pthread/tst-cond16.c