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/************************************************************************
*
* Copyright (C) 2009-2023 IRCAD France
* Copyright (C) 2012-2017 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#pragma once
#include <future>
namespace sight::core::thread
{
/**
* @brief This class encapsulates packaged task and provides a copy constructor.
*/
template<typename R>
struct task_handler
{
/// Constructor, moves task.
task_handler(std::packaged_task<R>& _task);
/// Copy constructor, moves task.
task_handler(const task_handler& _that);
/// Copy constructor forbidden.
task_handler& operator=(const task_handler&) = delete;
/// Executes intern packaged task.
void operator()() const;
private:
/// Encapsulated packaged task.
mutable std::packaged_task<R> m_task;
};
/// Encapsulate a packaged_task into a boost function to be easily posted on a worker.
template<typename R>
inline std::function<void()> move_task_into_function(std::packaged_task<R>& _task);
} //namespace sight::core::thread
#include <core/thread/task_handler.hxx>
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