handler.cpp

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// Copyright (c) 2018-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#include <interfaces/handler.h>
 
 
#include <boost/signals2/connection.hpp>
#include <utility>
 
namespace interfaces {
namespace {
 
class HandlerImpl : public Handler
{
public:
    explicit HandlerImpl(boost::signals2::connection connection) : m_connection(std::move(connection)) {}
 
    void disconnect() override { m_connection.disconnect(); }
 
    boost::signals2::scoped_connection m_connection;
};
 
class CleanupHandler : public Handler
{
public:
    explicit CleanupHandler(std::function<void()> cleanup) : m_cleanup(std::move(cleanup)) {}
    ~CleanupHandler() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
    void disconnect() override { if (!m_cleanup) return; m_cleanup(); m_cleanup = nullptr; }
    std::function<void()> m_cleanup;
};
 
} // namespace
 
std::unique_ptr<Handler> MakeHandler(boost::signals2::connection connection)
{
    return std::make_unique<HandlerImpl>(std::move(connection));
}
 
std::unique_ptr<Handler> MakeHandler(std::function<void()> cleanup)
{
    return std::make_unique<CleanupHandler>(std::move(cleanup));
}
 
} // namespace interfaces