1  /* Copyright (C) 2002-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <pthread.h>
      19  #include <signal.h>
      20  #include <stdio.h>
      21  #include <stdlib.h>
      22  #include <unistd.h>
      23  
      24  static int do_test (void);
      25  
      26  #define TEST_FUNCTION do_test ()
      27  #include "../test-skeleton.c"
      28  
      29  static pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
      30  static pthread_rwlock_t r;
      31  
      32  
      33  static void *
      34  tf (void *arg)
      35  {
      36    if (pthread_rwlock_wrlock (&r) == 0)
      37      {
      38        puts ("child: rwlock_wrlock succeeded");
      39        exit (1);
      40      }
      41  
      42    puts ("child: rwlock_wrlock returned");
      43  
      44    exit (1);
      45  }
      46  
      47  
      48  static int
      49  do_test (void)
      50  {
      51    pthread_t th;
      52  
      53    if (pthread_rwlock_init (&r, NULL) != 0)
      54      {
      55        puts ("rwlock_init failed");
      56        return 1;
      57      }
      58  
      59    if (pthread_rwlock_wrlock (&r) != 0)
      60      {
      61        puts ("rwlock_wrlock failed");
      62        return 1;
      63      }
      64  
      65    if (pthread_mutex_lock (&m) != 0)
      66      {
      67        puts ("mutex_lock failed");
      68        return 1;
      69      }
      70  
      71    if (pthread_create (&th, NULL, tf, NULL) != 0)
      72      {
      73        puts ("create failed");
      74        return 1;
      75      }
      76  
      77    delayed_exit (1);
      78    /* This call should never return.  */
      79    xpthread_mutex_lock (&m);
      80  
      81    puts ("2nd mutex_lock returned");
      82    return 1;
      83  }