140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
// Copyright (C) 2021 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
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// This file is part of the "Nazara Engine - Core module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_SIGNAL_HPP
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#define NAZARA_SIGNAL_HPP
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#include <functional>
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#include <memory>
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#include <vector>
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#define NazaraDetailSignal(Keyword, SignalName, ...) using SignalName ## Type = Nz::Signal<__VA_ARGS__>; \
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Keyword SignalName ## Type SignalName
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#define NazaraSignal(SignalName, ...) NazaraDetailSignal(mutable, SignalName, __VA_ARGS__)
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#define NazaraStaticSignal(SignalName, ...) NazaraDetailSignal(static, SignalName, __VA_ARGS__)
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#define NazaraStaticSignalImpl(Class, SignalName) Class :: SignalName ## Type Class :: SignalName
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#define NazaraSlotType(Class, SignalName) Class::SignalName ## Type::ConnectionGuard
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#define NazaraSlot(Class, SignalName, SlotName) NazaraSlotType(Class, SignalName) SlotName
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namespace Nz
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{
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template<typename... Args>
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class Signal
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{
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public:
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using Callback = std::function<void(Args...)>;
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class Connection;
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class ConnectionGuard;
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Signal();
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Signal(const Signal&);
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Signal(Signal&& signal) noexcept;
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~Signal() = default;
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void Clear();
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Connection Connect(const Callback& func);
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Connection Connect(Callback&& func);
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template<typename O> Connection Connect(O& object, void (O::*method)(Args...));
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template<typename O> Connection Connect(O* object, void (O::*method)(Args...));
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template<typename O> Connection Connect(const O& object, void (O::*method)(Args...) const);
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template<typename O> Connection Connect(const O* object, void (O::*method)(Args...) const);
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void operator()(Args... args) const;
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Signal& operator=(const Signal&);
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Signal& operator=(Signal&& signal) noexcept;
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private:
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struct Slot;
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using SlotPtr = std::shared_ptr<Slot>;
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using SlotList = std::vector<SlotPtr>;
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using SlotListIndex = typename SlotList::size_type;
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struct Slot
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{
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Slot(Signal* me) :
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signal(me)
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{
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}
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Callback callback;
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Signal* signal;
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SlotListIndex index;
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};
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void Disconnect(const SlotPtr& slot) noexcept;
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SlotList m_slots;
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mutable SlotListIndex m_slotIterator;
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};
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template<typename... Args>
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class Signal<Args...>::Connection
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{
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using BaseClass = Signal<Args...>;
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friend BaseClass;
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public:
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Connection() = default;
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Connection(const Connection& connection) = default;
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Connection(Connection&& connection) noexcept;
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~Connection() = default;
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template<typename... ConnectArgs>
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void Connect(BaseClass& signal, ConnectArgs&&... args);
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void Disconnect() noexcept;
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bool IsConnected() const;
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Connection& operator=(const Connection& connection) = default;
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Connection& operator=(Connection&& connection) noexcept;
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private:
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Connection(const SlotPtr& slot);
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std::weak_ptr<Slot> m_ptr;
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};
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template<typename... Args>
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class Signal<Args...>::ConnectionGuard
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{
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using BaseClass = Signal<Args...>;
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using Connection = typename BaseClass::Connection;
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public:
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ConnectionGuard() = default;
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ConnectionGuard(const Connection& connection);
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ConnectionGuard(const ConnectionGuard& connection) = delete;
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ConnectionGuard(Connection&& connection);
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ConnectionGuard(ConnectionGuard&& connection) noexcept = default;
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~ConnectionGuard();
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template<typename... ConnectArgs>
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void Connect(BaseClass& signal, ConnectArgs&&... args);
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void Disconnect() noexcept;
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Connection& GetConnection();
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bool IsConnected() const;
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ConnectionGuard& operator=(const Connection& connection);
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ConnectionGuard& operator=(const ConnectionGuard& connection) = delete;
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ConnectionGuard& operator=(Connection&& connection);
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ConnectionGuard& operator=(ConnectionGuard&& connection) noexcept;
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private:
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Connection m_connection;
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};
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}
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#include <Nazara/Core/Signal.inl>
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#endif // NAZARA_SIGNAL_HPP
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