task_manager.hpp

/*
 * Copyright 2024 Guillaume Guillet
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef _FGE_TASK_MANAGER_HPP_INCLUDED
#define _FGE_TASK_MANAGER_HPP_INCLUDED
 
#include "FastEngine/fge_extern.hpp"
#include <memory>
#include <optional>
#include <typeinfo>
 
namespace fge
{
 
class Task;
 
using TaskTypeIndex = uint16_t;
 
class TaskTypeBase
{
public:
    TaskTypeBase() = default;
    TaskTypeBase(TaskTypeBase const& r) = delete;
    TaskTypeBase(TaskTypeBase&& r) noexcept = delete;
    virtual ~TaskTypeBase() = default;
 
    TaskTypeBase& operator=(TaskTypeBase const& r) = delete;
    TaskTypeBase& operator=(TaskTypeBase&& r) noexcept = delete;
 
    [[nodiscard]] virtual fge::Task* createTask() const = 0;
    [[nodiscard]] virtual std::type_info const& getType() const = 0;
};
 
template<class T>
class TaskType : public TaskTypeBase
{
public:
    TaskType() = default;
    ~TaskType() override = default;
 
    [[nodiscard]] inline fge::Task* createTask() const override { return new T(); }
    [[nodiscard]] inline std::type_info const& getType() const override { return typeid(T); }
};
 
namespace task
{
 
FGE_API std::optional<fge::TaskTypeIndex> RegisterNewTask(std::unique_ptr<fge::TaskTypeBase> taskType);
template<class T>
inline std::optional<fge::TaskTypeIndex> RegisterNewTask()
{
    return RegisterNewTask(std::make_unique<fge::TaskType<T>>());
}
[[nodiscard]] FGE_API fge::Task* CreateNewTask(fge::TaskTypeIndex index);
[[nodiscard]] FGE_API std::optional<fge::TaskTypeIndex> GetTaskIndex(std::type_info const& type);
 
} // namespace task
} // namespace fge
 
#endif // _FGE_TASK_MANAGER_HPP_INCLUDED