libstdc++-v3/testsuite/29_atomics/headers/stdatomic.h/functions.c

   1 // { dg-options "-x c" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2008 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 2, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING.  If not, write to the Free
  19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  20 // USA.
  21
  22 #include <stdatomic.h>
  23
  24 int main()
  25 {
  26   volatile atomic_flag f;
  27   volatile atomic_flag* p = &f;
  28   memory_order m = memory_order_relaxed;
  29
  30   // For position only.
  31   atomic_flag_test_and_set(p);
  32   atomic_flag_test_and_set_explicit(p, m);
  33   atomic_flag_clear(p);
  34   atomic_flag_clear_explicit(p, m);
  35   atomic_flag_fence(p, m);
  36
  37   return 0;
  38 }