1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
bool exiting;
int fd, count, spins, nn;
void *
tf (void *id)
{
pthread_mutex_lock (&lock);
if ((long) id == 0)
{
while (!exiting)
{
if ((spins++ % 1000) == 0)
write (fd, ".", 1);
pthread_mutex_unlock (&lock);
pthread_mutex_lock (&lock);
int njobs = rand () % (count + 1);
nn = njobs;
if ((rand () % 30) == 0)
pthread_cond_broadcast (&cv);
else
while (njobs--)
pthread_cond_signal (&cv);
}
pthread_cond_broadcast (&cv);
}
else
{
while (!exiting)
{
while (!nn && !exiting)
pthread_cond_wait (&cv, &lock);
--nn;
pthread_mutex_unlock (&lock);
pthread_mutex_lock (&lock);
}
}
pthread_mutex_unlock (&lock);
return NULL;
}
int
do_test (void)
{
fd = open ("/dev/null", O_WRONLY);
if (fd < 0)
{
printf ("couldn't open /dev/null, %m\n");
return 1;
}
count = sysconf (_SC_NPROCESSORS_ONLN);
if (count <= 0)
count = 1;
count *= 8;
pthread_t th[count + 1];
int i, ret;
for (i = 0; i <= count; ++i)
if ((ret = pthread_create (&th[i], NULL, tf, (void *) (long) i)) != 0)
{
errno = ret;
printf ("pthread_create %d failed: %m\n", i);
return 1;
}
struct timespec ts = { .tv_sec = 20, .tv_nsec = 0 };
while (nanosleep (&ts, &ts) != 0);
pthread_mutex_lock (&lock);
exiting = true;
pthread_mutex_unlock (&lock);
for (i = 0; i < count; ++i)
pthread_join (th[i], NULL);
close (fd);
return 0;
}
#define TEST_FUNCTION do_test ()
#define TIMEOUT 40
#include "../test-skeleton.c"
|
