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
|
/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Roland McGrath <roland@redhat.com>, 2002.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
static void *
thread_function (void * arg)
{
int i = (intptr_t) arg;
int status;
pid_t pid;
pid_t pid2;
pid = fork ();
switch (pid)
{
case 0:
printf ("%ld for %d\n", (long int) getpid (), i);
struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 * i };
nanosleep (&ts, NULL);
_exit (i);
break;
case -1:
printf ("fork: %m\n");
return (void *) 1l;
break;
}
pid2 = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
if (pid2 != pid)
{
printf ("waitpid returned %ld, expected %ld\n",
(long int) pid2, (long int) pid);
return (void *) 1l;
}
printf ("%ld with %d, expected %d\n",
(long int) pid, WEXITSTATUS (status), i);
return WEXITSTATUS (status) == i ? NULL : (void *) 1l;
}
#define N 5
static const int t[N] = { 7, 6, 5, 4, 3 };
int
main (void)
{
pthread_t th[N];
int i;
int result = 0;
for (i = 0; i < N; ++i)
if (pthread_create (&th[i], NULL, thread_function,
(void *) (intptr_t) t[i]) != 0)
{
printf ("creation of thread %d failed\n", i);
exit (1);
}
for (i = 0; i < N; ++i)
{
void *v;
if (pthread_join (th[i], &v) != 0)
{
printf ("join of thread %d failed\n", i);
result = 1;
}
else if (v != NULL)
{
printf ("join %d successful, but child failed\n", i);
result = 1;
}
else
printf ("join %d successful\n", i);
}
return result;
}
|
