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

   1 // { dg-do run { target c++20 } }
   2 // { dg-additional-options "-pthread" { target pthread } }
   3 // { dg-require-gthreads "" }
   4 // { dg-add-options libatomic }
   5
   6 // Copyright (C) 2020-2024 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 #include <atomic>
  24 #include <thread>
  25
  26 #include <testsuite_hooks.h>
  27
  28 int
  29 main ()
  30 {
  31   long aa;
  32   long bb;
  33   std::atomic<long*> a(&aa);
  34   VERIFY( a.load() == &aa );
  35   a.wait(&bb);
  36   std::thread t([&]
  37     {
  38       a.store(&bb);
  39       a.notify_one();
  40     });
  41   a.wait(&aa);
  42   t.join();
  43
  44   return 0;
  45 }