nptl/tst-cond14.c

   1 /* Copyright (C) 2004-2017 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25
  26 static pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
  27 static pthread_mutex_t mut = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
  28 static pthread_mutex_t mut2 = PTHREAD_MUTEX_INITIALIZER;
  29
  30 static void *
  31 tf (void *p)
  32 {
  33   if (pthread_mutex_lock (&mut) != 0)
  34     {
  35       printf ("%s: 1st mutex_lock failed\n", __func__);
  36       exit (1);
  37     }
  38   if (pthread_mutex_lock (&mut) != 0)
  39     {
  40       printf ("%s: 2nd mutex_lock failed\n", __func__);
  41       exit (1);
  42     }
  43   if (pthread_mutex_lock (&mut) != 0)
  44     {
  45       printf ("%s: 3rd mutex_lock failed\n", __func__);
  46       exit (1);
  47     }
  48
  49   if (pthread_mutex_unlock (&mut2) != 0)
  50     {
  51       printf ("%s: mutex_unlock failed\n", __func__);
  52       exit (1);
  53     }
  54
  55   if (pthread_cond_wait (&cond, &mut) != 0)
  56     {
  57       printf ("%s: cond_wait failed\n", __func__);
  58       exit (1);
  59     }
  60
  61   puts ("child: done");
  62
  63   return NULL;
  64 }
  65
  66
  67 static int
  68 do_test (void)
  69 {
  70   if (pthread_mutex_lock (&mut2) != 0)
  71     {
  72       puts ("1st mutex_lock failed");
  73       return 1;
  74     }
  75
  76   puts ("parent: create child");
  77
  78   pthread_t th;
  79   int err = pthread_create (&th, NULL, tf, NULL);
  80   if (err != 0)
  81     {
  82       printf ("parent: cannot create thread: %s\n", strerror (err));
  83       return 1;
  84     }
  85
  86   /* We have to synchronize with the child.  */
  87   if (pthread_mutex_lock (&mut2) != 0)
  88     {
  89       puts ("2nd mutex_lock failed");
  90       return 1;
  91     }
  92
  93   /* Give the child to reach to pthread_cond_wait.  */
  94   sleep (1);
  95
  96   if (pthread_cond_signal (&cond) != 0)
  97     {
  98       puts ("cond_signal failed");
  99       return 1;
 100     }
 101
 102   err = pthread_join (th, NULL);
 103   if (err != 0)
 104     {
 105       printf ("parent: failed to join: %s\n", strerror (err));
 106       return 1;
 107     }
 108
 109   puts ("done");
 110
 111   return 0;
 112 }
 113
 114
 115 #define TEST_FUNCTION do_test ()
 116 #define TIMEOUT 3
 117 #include "../test-skeleton.c"