nptl/tst-cond14.c

   1 /* Copyright (C) 2004 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26
  27 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  28 static pthread_mutex_t mut = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
  29 static pthread_mutex_t mut2 = PTHREAD_MUTEX_INITIALIZER;
  30
  31 static void *
  32 tf (void *p)
  33 {
  34   if (pthread_mutex_lock (&mut) != 0)
  35     {
  36       printf ("%s: 1st mutex_lock failed\n", __func__);
  37       exit (1);
  38     }
  39   if (pthread_mutex_lock (&mut) != 0)
  40     {
  41       printf ("%s: 2nd mutex_lock failed\n", __func__);
  42       exit (1);
  43     }
  44   if (pthread_mutex_lock (&mut) != 0)
  45     {
  46       printf ("%s: 3rd mutex_lock failed\n", __func__);
  47       exit (1);
  48     }
  49
  50   if (pthread_mutex_unlock (&mut2) != 0)
  51     {
  52       printf ("%s: mutex_unlock failed\n", __func__);
  53       exit (1);
  54     }
  55
  56   if (pthread_cond_wait (&cond, &mut) != 0)
  57     {
  58       printf ("%s: cond_wait failed\n", __func__);
  59       exit (1);
  60     }
  61
  62   puts ("child: done");
  63
  64   return NULL;
  65 }
  66
  67
  68 static int
  69 do_test (void)
  70 {
  71   if (pthread_mutex_lock (&mut2) != 0)
  72     {
  73       puts ("1st mutex_lock failed");
  74       return 1;
  75     }
  76
  77   puts ("parent: create child");
  78
  79   pthread_t th;
  80   int err = pthread_create (&th, NULL, tf, NULL);
  81   if (err != 0)
  82     {
  83       printf ("parent: cannot create thread: %s\n", strerror (err));
  84       return 1;
  85     }
  86
  87   /* We have to synchronize with the child.  */
  88   if (pthread_mutex_lock (&mut2) != 0)
  89     {
  90       puts ("2nd mutex_lock failed");
  91       return 1;
  92     }
  93
  94   /* Give the child to reach to pthread_cond_wait.  */
  95   sleep (1);
  96
  97   if (pthread_cond_signal (&cond) != 0)
  98     {
  99       puts ("cond_signal failed");
 100       return 1;
 101     }
 102
 103   err = pthread_join (th, NULL);
 104   if (err != 0)
 105     {
 106       printf ("parent: failed to join: %s\n", strerror (err));
 107       return 1;
 108     }
 109
 110   puts ("done");
 111
 112   return 0;
 113 }
 114
 115
 116 #define TEST_FUNCTION do_test ()
 117 #define TIMEOUT 3
 118 #include "../test-skeleton.c"