nptl/tst-rwlock3.c

   1 /* Copyright (C) 2002-2024 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 /* This test case checks more than standard compliance.  An
  19    implementation may provide this service but it is not required to
  20    do so.  */
  21
  22 #include <errno.h>
  23 #include <pthread.h>
  24 #include <stdio.h>
  25
  26
  27 static int
  28 do_test (void)
  29 {
  30   pthread_rwlock_t r;
  31   int e;
  32
  33   if (pthread_rwlock_init (&r, NULL) != 0)
  34     {
  35       puts ("rwlock_init failed");
  36       return 1;
  37     }
  38   puts ("rwlock_init succeeded");
  39
  40   if (pthread_rwlock_trywrlock (&r) != 0)
  41     {
  42       puts ("rwlock_trywrlock on unlocked rwlock failed");
  43       return 1;
  44     }
  45   puts ("rwlock_trywrlock on unlocked rwlock succeeded");
  46
  47   e = pthread_rwlock_rdlock (&r);
  48   if (e == 0)
  49     {
  50       puts ("rwlock_rdlock on rwlock with writer succeeded");
  51       return 1;
  52     }
  53   if (e != EDEADLK)
  54     {
  55       puts ("rwlock_rdlock on rwlock with writer failed != EDEADLK");
  56       return 1;
  57     }
  58   puts ("rwlock_rdlock on rwlock with writer failed with EDEADLK");
  59
  60   e = pthread_rwlock_wrlock (&r);
  61   if (e == 0)
  62     {
  63       puts ("rwlock_wrlock on rwlock with writer succeeded");
  64       return 1;
  65     }
  66   if (e != EDEADLK)
  67     {
  68       puts ("rwlock_wrlock on rwlock with writer failed != EDEADLK");
  69       return 1;
  70     }
  71   puts ("rwlock_wrlock on rwlock with writer failed with EDEADLK");
  72
  73   if (pthread_rwlock_unlock (&r) != 0)
  74     {
  75       puts ("rwlock_unlock failed");
  76       return 1;
  77     }
  78   puts ("rwlock_unlock succeeded");
  79
  80   if (pthread_rwlock_destroy (&r) != 0)
  81     {
  82       puts ("rwlock_destroy failed");
  83       return 1;
  84     }
  85   puts ("rwlock_destroy succeeded");
  86
  87   return 0;
  88 }
  89
  90 #define TEST_FUNCTION do_test ()
  91 #include "../test-skeleton.c"