nptl/tst-rwlock5.c

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26
  27 static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
  28 static pthread_rwlock_t r;
  29
  30
  31 static void *
  32 tf (void *arg)
  33 {
  34   if (pthread_rwlock_wrlock (&r) == 0)
  35     {
  36       puts ("child: rwlock_wrlock succeeded");
  37       exit (1);
  38     }
  39
  40   puts ("child: rwlock_wrlock returned");
  41
  42   exit (1);
  43 }
  44
  45
  46 static int
  47 do_test (void)
  48 {
  49   pthread_t th;
  50
  51   if (pthread_rwlock_init (&r, NULL) != 0)
  52     {
  53       puts ("rwlock_init failed");
  54       return 1;
  55     }
  56
  57   if (pthread_rwlock_wrlock (&r) != 0)
  58     {
  59       puts ("rwlock_wrlock failed");
  60       return 1;
  61     }
  62
  63   if (pthread_mutex_lock (&m) != 0)
  64     {
  65       puts ("mutex_lock failed");
  66       return 1;
  67     }
  68
  69   /* Set an alarm for 1 second.  The wrapper will expect this.  */
  70   alarm (1);
  71
  72   if (pthread_create (&th, NULL, tf, NULL) != 0)
  73     {
  74       puts ("create failed");
  75       return 1;
  76     }
  77
  78   /* This call should never return.  */
  79   pthread_mutex_lock (&m);
  80
  81   puts ("2nd mutex_lock returned");
  82   return 1;
  83 }
  84
  85 #define EXPECTED_SIGNAL SIGALRM
  86 #define TEST_FUNCTION do_test ()
  87 #include "../test-skeleton.c"