libstdc++-v3/testsuite/30_threads/future/members/93456.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) 2020-2021 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 <thread>
  26 #include <chrono>
  27 #include <climits>
  28 #include <testsuite_hooks.h>
  29
  30 namespace chrono = std::chrono;
  31
  32 void test01()
  33 {
  34   std::future<void> fut = std::async(std::launch::async, [] {
  35     std::this_thread::sleep_for(chrono::seconds(4));
  36   });
  37
  38   // A time in the distant future, but which overflows 32-bit time_t:
  39   auto then = chrono::system_clock::now() + chrono::seconds(UINT_MAX + 2LL);
  40   auto status = fut.wait_until(then);
  41   // The wait_until call should have waited for the result to be ready.
  42   // If converting the time_point to time_t overflows, it will timeout.
  43   VERIFY(status == std::future_status::ready);
  44 }
  45
  46 int main()
  47 {
  48   test01();
  49 }