PackagedTask.hpp

// SPDX-FileCopyrightText: 2025-2026 Vincent Leroy
// SPDX-License-Identifier: MIT
//
// This file is part of dfx.
//
// Licensed under the MIT License. See the LICENSE file in the project root
// for full license information.
 
#pragma once
 
// Standard includes
#include <concepts>
#include <future>
 
// Project includes
#include <dfx-runtime-api/Task.hpp>
 
namespace dfx::Runtime
{
template<typename R>
class PackagedTask : public Api::Task
{
public:
    template<typename Func>
    requires (!std::same_as<PackagedTask, std::remove_cvref_t<Func>>)
    explicit PackagedTask(Func && func, int priority = 0)
        : Task(priority)
        , _task { std::forward<Func>(func) }
    {}

    std::future<R> getFuture()
    { return _task.get_future(); }

    void run() override
    { _task(); }
 
private:
    std::packaged_task<R()> _task;
};

template<typename Func, typename ... Args>
auto makePackagedTask(Func && func, Args && ... args)
{
    using ReturnType = std::invoke_result_t<Func>;
    return std::make_unique<PackagedTask<ReturnType>>(std::forward<Func>(func), std::forward<Args>(args)...);
}
} // !namespace dfx::Runtime