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

   1 // { dg-options "-std=gnu++2a" }
   2 // { dg-do run { target c++2a } }
   3 // { dg-require-gthreads "" }
   4 // { dg-additional-options "-pthread" { target pthread } }
   5 // { dg-add-options libatomic }
   6
   7 // Copyright (C) 2020-2022 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
  25 #include <atomic>
  26 #include <thread>
  27
  28 #include <testsuite_hooks.h>
  29
  30 template<typename Tp>
  31   void
  32   check()
  33   {
  34     std::atomic<Tp> a{ 1.0 };
  35     VERIFY( a.load() != 0.0 );
  36     a.wait( 0.0 );
  37     std::thread t([&]
  38       {
  39         a.store(0.0);
  40         a.notify_one();
  41       });
  42     a.wait(1.0);
  43     t.join();
  44   }
  45
  46 int
  47 main ()
  48 {
  49   check<float>();
  50   check<double>();
  51   return 0;
  52 }