1// Copyright (c) 2018-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_INTERFACES_HANDLER_H
6#define BITCOIN_INTERFACES_HANDLER_H
7
8#include <functional>
9#include <memory>
10
11namespace btcsignals {
12    class connection;
13} // namespace btcsignals
14
15namespace interfaces {
16
17//! Generic interface for managing an event handler or callback function
18//! registered with another interface. Has a single disconnect method to cancel
19//! the registration and prevent any future notifications.
20class Handler
21{
22public:
23    virtual ~Handler() = default;
24
25    //! Disconnect the handler.
26    virtual void disconnect() = 0;
27};
28
29//! Return handler wrapping a btcsignals connection.
30std::unique_ptr<Handler> MakeSignalHandler(btcsignals::connection connection);
31
32//! Return handler wrapping a cleanup function.
33std::unique_ptr<Handler> MakeCleanupHandler(std::function<void()> cleanup);
34
35} // namespace interfaces
36
37#endif // BITCOIN_INTERFACES_HANDLER_H
38