libstdc++-v3/testsuite/29_atomics/atomic_float/wait_notify.cc

   1 // { dg-do run { target c++20 } }
   2 // { dg-require-gthreads "" }
   3 // { dg-additional-options "-pthread" { target pthread } }
   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
  24 #include <atomic>
  25 #include <thread>
  26
  27 #include <testsuite_hooks.h>
  28
  29 template<typename Tp>
  30   void
  31   check()
  32   {
  33     std::atomic<Tp> a{ 1.0 };
  34     VERIFY( a.load() != 0.0 );
  35     a.wait( 0.0 );
  36     std::thread t([&]
  37       {
  38         a.store(0.0);
  39         a.notify_one();
  40       });
  41     a.wait(1.0);
  42     t.join();
  43   }
  44
  45 int
  46 main ()
  47 {
  48   check<float>();
  49   check<double>();
  50   return 0;
  51 }