qtbridge.h

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/*
 * Copyright © 2014 Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3,
 * as published by the Free Software Foundation.
 *
 * This program 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authored by: Jussi Pakkanen <jussi.pakkanen@canonical.com>
 *              Thomas Voß <thomas.voss@canonical.com>
 */
 
#ifndef QT_CORE_WORLD_BRIDGE_H_
#define QT_CORE_WORLD_BRIDGE_H_
 
#include <QObject>
 
#include <functional>
#include <future>
#include <iostream>
 
namespace qt
{
namespace core
{
namespace world
{
void build_and_run(int argc, char** argv, const std::function<void()>& ready);
 
void destroy();
 
std::future<void> enter_with_task(const std::function<void()>& task);
 
 
template<typename T>
inline std::future<T> enter_with_task_and_expect_result(const std::function<T()>& task)
{
    std::shared_ptr<std::promise<T>> promise = std::make_shared<std::promise<T>>();
    std::future<T> future = promise->get_future();
 
    auto t = [promise, task]()
    {
        try
        {
            promise->set_value(task());
        } catch(...)
        {
            promise->set_exception(std::current_exception());
        }
    };
 
    enter_with_task(t);
 
    return future;
}
}
}
}
 
#endif // QT_CORE_WORLD_BRIDGE_H_