libstdc++-v3/testsuite/30_threads/future/members/wait_until.cc

   1 // { dg-do run }
   2 // { dg-additional-options "-pthread" { target pthread } }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-gthreads "" }
   5
   6 // Copyright (C) 2009-2022 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 <future>
  25 #include <chrono>
  26 #include <testsuite_hooks.h>
  27
  28 std::chrono::system_clock::time_point make_time(int i)
  29 {
  30   return std::chrono::system_clock::now() + std::chrono::milliseconds(i);
  31 }
  32
  33 void test01()
  34 {
  35   std::promise<int> p1;
  36   std::future<int> f1(p1.get_future());
  37
  38   auto when = make_time(10);
  39   VERIFY( f1.wait_until(when) == std::future_status::timeout );
  40   VERIFY( std::chrono::system_clock::now() >= when );
  41
  42   p1.set_value(1);
  43
  44   when = make_time(100);
  45   VERIFY( f1.wait_until(when) == std::future_status::ready );
  46   VERIFY( std::chrono::system_clock::now() < when );
  47 }
  48
  49 int main()
  50 {
  51   test01();
  52   return 0;
  53 }