nptl/tst-rwlock5.c

   1 /* Copyright (C) 2002-2013 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25
  26 static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
  27 static pthread_rwlock_t r;
  28
  29
  30 static void *
  31 tf (void *arg)
  32 {
  33   if (pthread_rwlock_wrlock (&r) == 0)
  34     {
  35       puts ("child: rwlock_wrlock succeeded");
  36       exit (1);
  37     }
  38
  39   puts ("child: rwlock_wrlock returned");
  40
  41   exit (1);
  42 }
  43
  44
  45 static int
  46 do_test (void)
  47 {
  48   pthread_t th;
  49
  50   if (pthread_rwlock_init (&r, NULL) != 0)
  51     {
  52       puts ("rwlock_init failed");
  53       return 1;
  54     }
  55
  56   if (pthread_rwlock_wrlock (&r) != 0)
  57     {
  58       puts ("rwlock_wrlock failed");
  59       return 1;
  60     }
  61
  62   if (pthread_mutex_lock (&m) != 0)
  63     {
  64       puts ("mutex_lock failed");
  65       return 1;
  66     }
  67
  68   /* Set an alarm for 1 second.  The wrapper will expect this.  */
  69   alarm (1);
  70
  71   if (pthread_create (&th, NULL, tf, NULL) != 0)
  72     {
  73       puts ("create failed");
  74       return 1;
  75     }
  76
  77   /* This call should never return.  */
  78   pthread_mutex_lock (&m);
  79
  80   puts ("2nd mutex_lock returned");
  81   return 1;
  82 }
  83
  84 #define EXPECTED_SIGNAL SIGALRM
  85 #define TEST_FUNCTION do_test ()
  86 #include "../test-skeleton.c"