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// { dg-do run }
// { dg-options "-pthread" }
// { dg-require-effective-target c++11 }
// { dg-require-effective-target pthread }
// { dg-require-gthreads "" }
// Copyright (C) 2009-2018 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 <testsuite_hooks.h>
// Test promise::set_value() for deadlock by checking if the state is ready
// during construction and destruction of the associated state.
struct tester
{
tester(int);
tester(const tester&);
tester() = delete;
tester& operator=(const tester&);
};
std::promise<tester> pglobal;
std::future<tester> fglobal = pglobal.get_future();
auto delay = std::chrono::milliseconds(1);
tester::tester(int)
{
VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
}
tester::tester(const tester&)
{
// if this copy happens while a mutex is locked next line could deadlock:
VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
}
tester& tester::operator=(const tester&)
{
// if this copy happens while a mutex is locked next line could deadlock:
VERIFY (fglobal.wait_for(delay) == std::future_status::timeout);
return *this;
}
void test01()
{
pglobal.set_value( tester(1) );
VERIFY (fglobal.wait_for(delay) == std::future_status::ready);
}
int main()
{
test01();
return 0;
}
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