1  /* C11 threads recursive mutex tests.
       2     Copyright (C) 2018-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       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     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <threads.h>
      20  #include <stdio.h>
      21  #include <unistd.h>
      22  
      23  #include <support/check.h>
      24  
      25  static int
      26  do_test (void)
      27  {
      28    static mtx_t mutex;
      29  
      30    if (mtx_init (&mutex, mtx_plain | mtx_recursive) != thrd_success)
      31      FAIL_EXIT1 ("mtx_init failed");
      32  
      33    if (mtx_lock (&mutex) != thrd_success)
      34      FAIL_EXIT1 ("mtx_lock failed");
      35  
      36    /* Lock mutex second time, if not recursive should deadlock.  */
      37    if (mtx_lock (&mutex) != thrd_success)
      38      FAIL_EXIT1 ("mtx_lock failed");
      39  
      40    mtx_destroy (&mutex);
      41  
      42    return 0;
      43  }
      44  
      45  #include <support/test-driver.c>