libstdc++-v3/testsuite/29_atomics/atomic/wait_notify/pointers.cc

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do run { target c++2a } }
   3 // { dg-additional-options "-pthread" { target pthread } }
   4 // { dg-require-gthreads "" }
   5 // { dg-add-options libatomic }
   6
   7 // Copyright (C) 2020-2023 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 #include <atomic>
  25 #include <thread>
  26
  27 #include <testsuite_hooks.h>
  28
  29 int
  30 main ()
  31 {
  32   long aa;
  33   long bb;
  34   std::atomic<long*> a(&aa);
  35   VERIFY( a.load() == &aa );
  36   a.wait(&bb);
  37   std::thread t([&]
  38     {
  39       a.store(&bb);
  40       a.notify_one();
  41     });
  42   a.wait(&aa);
  43   t.join();
  44
  45   return 0;
  46 }