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// Copyright (c) 2018-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_INTERFACES_HANDLER_H
#define BITCOIN_INTERFACES_HANDLER_H
#include <functional>
#include <memory>
namespace boost {
namespace signals2 {
class connection;
} // namespace signals2
} // namespace boost
namespace interfaces {
//! Generic interface for managing an event handler or callback function
//! registered with another interface. Has a single disconnect method to cancel
//! the registration and prevent any future notifications.
class Handler
{
public:
virtual ~Handler() {}
//! Disconnect the handler.
virtual void disconnect() = 0;
};
//! Return handler wrapping a boost signal 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
#endif // BITCOIN_INTERFACES_HANDLER_H
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