text: /*
   * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; version 2 of the
   * License.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301  USA
   */
  
  #ifndef _NGS_MESSAGE_H_
  #define _NGS_MESSAGE_H_
  
  #include "ngs/memory.h"
  #include "ngs_common/protocol_protobuf.h"
  
  namespace ngs
  {
  
  #ifdef USE_MYSQLX_FULL_PROTO
    typedef ::google::protobuf::Message Message;
  #else
    typedef ::google::protobuf::MessageLite Message;
  #endif
  
    /* X protocol client request object.
  
    This object provides a high-level interface for a X protocol object.
    The original network packet buffer, a parsed protobuf message or both can be
    held by it.
  
    The goal is to allow lazy parsing of messages, so that for example,
    a very large opaque field won't be copied into another buffer by protobuf.
    */
    class Request
    {
    public:
      Request(int8_t type)
      : m_raw_data(NULL), m_raw_data_size(0),
        m_type(type), m_message(NULL), m_owns_message(false) {}
  
      ~Request()
      {
        if (m_owns_message)
          ngs::free_object(m_message);
      }
  
      void set_parsed_message(Message *message, bool free_on_delete)
      {
        if (m_owns_message)
          ngs::free_object(m_message);
  
        m_message = message;
        m_owns_message = free_on_delete;
  
        // we do not own this buffer, it is managed elsewhere
        m_raw_data = NULL;
        m_raw_data_size = 0;
      }
  
      int8_t get_type() const { return m_type; }
      const Message *message() const { return m_message; }
      void buffer(char* ptr, std::size_t size)
      {
        m_raw_data = ptr;
        m_raw_data_size = size;
      }
  
      char* buffer() {return m_raw_data;}
      std::size_t buffer_size() {return m_raw_data_size;}
  
    private:
      char* m_raw_data;
      std::size_t m_raw_data_size;
      int8_t m_type;
      Message *m_message;
      bool m_owns_message;
    };
  
    typedef ngs::Memory_instrumented<Request>::Unique_ptr Request_unique_ptr;
  } // namespace ngs
  
  #endif // _NGS_MESSAGE_H_
   