Method LoggingConnection

src/kernel/bitcoinkernel.cpp:241–262

    std::function<void(void* user_data)> m_deleter;

    LoggingConnection(btck_LogCallback callback, void* user_data, btck_DestroyCallback user_data_destroy_callback)
    {
        LOCK(cs_main);

        auto connection{LogInstance().PushBackCallback([callback, user_data](const std::string& str) { callback(user_data, str.c_str(), str.length()); })};

        // Only start logging if we just added the connection.
        if (LogInstance().NumConnections() == 1 && !LogInstance().StartLogging()) {
            LogError("Logger start failed.");
            LogInstance().DeleteCallback(connection);
            if (user_data && user_data_destroy_callback) {
                user_data_destroy_callback(user_data);
            }
            throw std::runtime_error("Failed to start logging");
        }

        m_connection = std::make_unique<std::list<std::function<void(const std::string&)>>::iterator>(connection);
        m_user_data = user_data;
        m_deleter = user_data_destroy_callback;

        LogDebug(BCLog::KERNEL, "Logger connected.");
    }

    ~LoggingConnection()
    {