Differential D7699 Diff 24113 src/interfaces/handler.h

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src/interfaces/handler.h

	// Copyright (c) 2018 The Bitcoin Core developers			// Copyright (c) 2018 The Bitcoin Core developers
	// Distributed under the MIT software license, see the accompanying			// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.			// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#ifndef BITCOIN_INTERFACES_HANDLER_H			#ifndef BITCOIN_INTERFACES_HANDLER_H
	#define BITCOIN_INTERFACES_HANDLER_H			#define BITCOIN_INTERFACES_HANDLER_H

				#include <functional>
	#include <memory>			#include <memory>

	namespace boost {			namespace boost {
	namespace signals2 {			namespace signals2 {
	class connection;			class connection;
	} // namespace signals2			} // namespace signals2
	} // namespace boost			} // namespace boost

	namespace interfaces {			namespace interfaces {

	//! Generic interface for managing an event handler or callback function			//! Generic interface for managing an event handler or callback function
	//! registered with another interface. Has a single disconnect method to cancel			//! registered with another interface. Has a single disconnect method to cancel
	//! the registration and prevent any future notifications.			//! the registration and prevent any future notifications.
	class Handler {			class Handler {
	public:			public:
	virtual ~Handler() {}			virtual ~Handler() {}

	//! Disconnect the handler.			//! Disconnect the handler.
	virtual void disconnect() = 0;			virtual void disconnect() = 0;
	};			};

	//! Return handler wrapping a boost signal connection.			//! Return handler wrapping a boost signal connection.
	std::unique_ptr<Handler> MakeHandler(boost::signals2::connection connection);			std::unique_ptr<Handler> MakeHandler(boost::signals2::connection connection);

				//! Return handler wrapping a cleanup function.
				std::unique_ptr<Handler> MakeHandler(std::function<void()> cleanup);

	} // namespace interfaces			} // namespace interfaces

	#endif // BITCOIN_INTERFACES_HANDLER_H			#endif // BITCOIN_INTERFACES_HANDLER_H