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1/* Copyright (C) 2004-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
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 <errno.h>
20#include <limits.h>
21#include <fcntl.h>
22#include <pthread.h>
23#include <stdbool.h>
24#include <stdlib.h>
25#include <stdio.h>
26#include <unistd.h>
27
28pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
29pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
30bool exiting;
31int fd, spins, nn;
32enum { count = 8 }; /* Number of worker threads. */
33
34void *
35tf (void *id)
36{
37 pthread_mutex_lock (&lock);
38
39 if ((long) id == 0)
40 {
41 while (!exiting)
42 {
43 if ((spins++ % 1000) == 0)
44 write (fd, ".", 1);
45 pthread_mutex_unlock (&lock);
46
47 pthread_mutex_lock (&lock);
48 int njobs = rand () % (count + 1);
49 nn = njobs;
50 if ((rand () % 30) == 0)
51 pthread_cond_broadcast (&cv);
52 else
53 while (njobs--)
54 pthread_cond_signal (&cv);
55 }
56
57 pthread_cond_broadcast (&cv);
58 }
59 else
60 {
61 while (!exiting)
62 {
63 while (!nn && !exiting)
64 pthread_cond_wait (&cv, &lock);
65 --nn;
66 pthread_mutex_unlock (&lock);
67
68 pthread_mutex_lock (&lock);
69 }
70 }
71
72 pthread_mutex_unlock (&lock);
73 return NULL;
74}
75
76int
77do_test (void)
78{
79 fd = open ("/dev/null", O_WRONLY);
80 if (fd < 0)
81 {
82 printf ("couldn't open /dev/null, %m\n");
83 return 1;
84 }
85
86 pthread_t th[count + 1];
87 pthread_attr_t attr;
88 int i, ret, sz;
89 pthread_attr_init (&attr);
90 sz = sysconf (_SC_PAGESIZE);
91 if (sz < PTHREAD_STACK_MIN)
92 sz = PTHREAD_STACK_MIN;
93 pthread_attr_setstacksize (&attr, sz);
94
95 for (i = 0; i <= count; ++i)
96 if ((ret = pthread_create (&th[i], &attr, tf, (void *) (long) i)) != 0)
97 {
98 errno = ret;
99 printf ("pthread_create %d failed: %m\n", i);
100 return 1;
101 }
102
103 struct timespec ts = { .tv_sec = 20, .tv_nsec = 0 };
104 while (nanosleep (&ts, &ts) != 0);
105
106 pthread_mutex_lock (&lock);
107 exiting = true;
108 pthread_mutex_unlock (&lock);
109
110 for (i = 0; i < count; ++i)
111 pthread_join (th[i], NULL);
112
113 close (fd);
114 return 0;
115}
116
117#define TEST_FUNCTION do_test ()
118#define TIMEOUT 40
119#include "../test-skeleton.c"
120

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