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

   1 // { dg-do run }
   2 // { dg-options "-pthread"  }
   3 // { dg-require-effective-target c++11 }
   4 // { dg-require-effective-target pthread }
   5 // { dg-require-cstdint "" }
   6 // { dg-require-gthreads "" }
   7
   8 // Copyright (C) 2009-2017 Free Software Foundation, Inc.
   9 //
  10 // This file is part of the GNU ISO C++ Library.  This library is free
  11 // software; you can redistribute it and/or modify it under the
  12 // terms of the GNU General Public License as published by the
  13 // Free Software Foundation; either version 3, or (at your option)
  14 // any later version.
  15
  16 // This library is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20
  21 // You should have received a copy of the GNU General Public License along
  22 // with this library; see the file COPYING3.  If not see
  23 // <http://www.gnu.org/licenses/>.
  24
  25
  26 #include <future>
  27 #include <chrono>
  28 #include <testsuite_hooks.h>
  29
  30 std::chrono::system_clock::time_point make_time(int i)
  31 {
  32   return std::chrono::system_clock::now() + std::chrono::milliseconds(i);
  33 }
  34
  35 void test01()
  36 {
  37   std::promise<int> p1;
  38   std::future<int> f1(p1.get_future());
  39
  40   auto when = make_time(10);
  41   VERIFY( f1.wait_until(when) == std::future_status::timeout );
  42   VERIFY( std::chrono::system_clock::now() >= when );
  43
  44   p1.set_value(1);
  45
  46   when = make_time(100);
  47   VERIFY( f1.wait_until(when) == std::future_status::ready );
  48   VERIFY( std::chrono::system_clock::now() < when );
  49 }
  50
  51 int main()
  52 {
  53   test01();
  54   return 0;
  55 }