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[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 30_threads / packaged_task / members / get_future2.cc

// { dg-do run }
// { dg-additional-options "-pthread" { target pthread } }
// { dg-require-effective-target c++11 }
// { dg-require-gthreads "" }

// Copyright (C) 2009-2023 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3.  If not see
// <http://www.gnu.org/licenses/>.


#include <future>
#include <system_error>
#include <testsuite_hooks.h>

int& inc(int& i) { return ++i; }

void test01()
{
  bool test = false;

  std::packaged_task<int&(int&)> p1(inc);
  p1.get_future();

  try
  {
    p1.get_future();
    VERIFY( false );
  }
  catch (const std::future_error& e)
  {
    VERIFY( e.code() == std::future_errc::future_already_retrieved );
    test = true;
  }

  VERIFY( test );
}

int main()
{
  test01();
  return 0;
}