如何用std :: unique_ptr到期来替换std :: shared_ptr

Question

我正在开发用于库的异步网络代码，我的代码旨在发送＆＃39;数据非常完美：

//connection_id is a wrapper around a size_t
//data_vector is an alias for std::vector<unsigned char>
bool write_to_connection(const connection_id & id, const data_vector & data) {
    if (connections.contains(id)) {
        std::shared_ptr<data_vector> write_buffer = std::make_shared<data_vector>(data);
        connection_ptr conn = connections[id];
        conn->get_socket().async_write_some(
            boost::asio::buffer(
                *write_buffer
                ),
            std::bind(
                &basic_server::write,
                this,
                std::placeholders::_1,
                std::placeholders::_2,
                id,
                write_buffer
            )
        );
        return true;
    }
    return false;
}

void write(const boost::system::error_code & ec, size_t bytes_written, const connection_id & id, std::shared_ptr<data_vector> write_buffer) {
    if (ec) {
        connections.erase(id);
    }
}

但是，出于性能原因，我不喜欢使用std::shared_ptr来维护我的数据，特别是因为我可能会同时发出许多这样的回调。我甚至不在回调函数中使用它，只添加它以确保数据缓冲区的生命周期持续到写入完成。

我想使用std::unique_ptr，因为我在逻辑上只需要在任何给定时间获得该对象的一个​​副本，这些副本会被传递（读取：移动）到回调函数，我这样写的：

//connection_id is a wrapper around a size_t
//data_vector is an alias for std::vector<unsigned char>
bool write_to_connection(const connection_id & id, const data_vector & data) {
    if (connections.contains(id)) {
        std::unique_ptr<data_vector> write_buffer = std::make_unique<data_vector>(data);
        connection_ptr conn = connections[id];
        conn->get_socket().async_write_some(
            boost::asio::buffer(
                *write_buffer
                ),
            std::bind(
                &basic_server::write,
                this,
                std::placeholders::_1,
                std::placeholders::_2,
                id,
                std::move(write_buffer) //So that we're not performing a copy; we're performing a move
            )
        );
        return true;
    }
    return false;
}

void write(const boost::system::error_code & ec, size_t bytes_written, const connection_id & id, std::unique_ptr<data_vector> write_buffer) {
    if (ec) {
        connections.erase(id);
    }
}

然而，这很快就给了我这个（相当详细的）编译错误：

Error   C2280   'std::_Binder<std::_Unforced,void (__cdecl server::basic_server::* )(const boost::system::error_code &,size_t,const server::connection_id &,std::unique_ptr<server::data_vector,std::default_delete<_Ty>>),server::basic_server *const ,const std::_Ph<1> &,const std::_Ph<2> &,const server::connection_id &,std::unique_ptr<_Ty,std::default_delete<_Ty>>>::_Binder(const std::_Binder<std::_Unforced,void (__cdecl server::basic_server::* )(const boost::system::error_code &,size_t,const server::connection_id &,std::unique_ptr<_Ty,std::default_delete<_Ty>>),server::basic_server *const ,const std::_Ph<1> &,const std::_Ph<2> &,const server::connection_id &,std::unique_ptr<_Ty,std::default_delete<_Ty>>> &)': attempting to reference a deleted function Send File To Server C:\Users\rengland\Workspace_CPP\Library\Includes\boost\asio\basic_stream_socket.hpp 729 

我假设它在抱怨，因为代码认为我试图复制std::unique_ptr，尽管我打算将其转移到回调函数中。我有什么办法可以解决这个问题，或者我应该让自己辞职以使用std::shared_ptr版本吗？