aboutsummaryrefslogtreecommitdiff
path: root/nptl/tst-cond2.c
blob: 21bf817b135dd80f95189c8eeb93ff1f80f8f4ee (plain)
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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@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 <error.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>


static pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;

static pthread_barrier_t bar;


static void *
tf (void *a)
{
  int i = (long int) a;
  int err;

  printf ("child %d: lock\n", i);

  err = pthread_mutex_lock (&mut);
  if (err != 0)
    error (EXIT_FAILURE, err, "locking in child failed");

  printf ("child %d: sync\n", i);

  int e = pthread_barrier_wait (&bar);
  if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("child: barrier_wait failed");
      exit (1);
    }

  printf ("child %d: wait\n", i);

  err = pthread_cond_wait (&cond, &mut);
  if (err != 0)
    error (EXIT_FAILURE, err, "child %d: failed to wait", i);

  printf ("child %d: woken up\n", i);

  err = pthread_mutex_unlock (&mut);
  if (err != 0)
    error (EXIT_FAILURE, err, "child %d: unlock[2] failed", i);

  printf ("child %d: done\n", i);

  return NULL;
}


#define N 10


static int
do_test (void)
{
  pthread_t th[N];
  int i;
  int err;

  printf ("&cond = %p\n&mut = %p\n", &cond, &mut);

  if (pthread_barrier_init (&bar, NULL, 2) != 0)
    {
      puts ("barrier_init failed");
      exit (1);
    }

  for (i = 0; i < N; ++i)
    {
      printf ("create thread %d\n", i);

      err = pthread_create (&th[i], NULL, tf, (void *) (long int) i);
      if (err != 0)
	error (EXIT_FAILURE, err, "cannot create thread %d", i);

      printf ("wait for child %d\n", i);

      /* Wait for the child to start up and get the mutex for the
	 conditional variable.  */
      int e = pthread_barrier_wait (&bar);
      if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
	{
	  puts ("barrier_wait failed");
	  exit (1);
	}
    }

  puts ("get lock outselves");

  err = pthread_mutex_lock (&mut);
  if (err != 0)
    error (EXIT_FAILURE, err, "mut locking failed");

  puts ("broadcast");

  /* Wake up all threads.  */
  err = pthread_cond_broadcast (&cond);
  if (err != 0)
    error (EXIT_FAILURE, err, "parent: broadcast failed");

  err = pthread_mutex_unlock (&mut);
  if (err != 0)
    error (EXIT_FAILURE, err, "mut unlocking failed");

  /* Join all threads.  */
  for (i = 0; i < N; ++i)
    {
      printf ("join thread %d\n", i);

      err = pthread_join (th[i], NULL);
      if (err != 0)
	error (EXIT_FAILURE, err, "join of child %d failed", i);
    }

  puts ("done");

  return 0;
}


#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"