basicmuxmessage.h

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/*******************************************************************\

                   SESAME project software license

          Copyright (C) 2002, 2003 University of Amsterdam

    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; either version 2
        of the License, or (at your option) any later version.

   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., 59 Temple Place - Suite 330, Boston, MA
                           02111-1307, USA.

      For information regarding the SESAME software project see
              http://sesamesim.sourceforge.net or email
                    jcofflan@users.sourceforge.net

\*******************************************************************/

#ifndef BASICMUXMESSAGE_H
#define BASICMUXMESSAGE_H

#include <string.h>

class BasicMUXMessageBase {
 protected:
  typedef struct {
    long type;
    long key;
    char data[0];
  } message_t;

  size_t size;
  message_t *msg;

  BasicMUXMessageBase() : size(0), msg(NULL) {
  }

 public:
  BasicMUXMessageBase(const void *data, size_t size) : size(size) {
    msg = (message_t *)new char[sizeof(message_t) + size];
    if (data) memcpy(msg->data, data, size);
  }

  BasicMUXMessageBase(size_t size) : size(size) {
    msg = (message_t *)new char[sizeof(message_t) + size];
  }

  ~BasicMUXMessageBase() {
    if (msg) delete msg;
  }

  size_t getSize() {return size;}
  void *getData() {return msg->data;}

  friend class BasicMUXChannelBase;
  friend class BasicMsgQueueMUX;
};

template<class T> class BasicMUXChannel;

template<class T>
class BasicMUXMessage : public BasicMUXMessageBase {
 public:
  BasicMUXMessage() {
    size = sizeof(T);
    msg = (message_t *)new char[sizeof(message_t) + size];
  }
  BasicMUXMessage(T &data) {
    size = sizeof(T);
    msg = (message_t *)new char[sizeof(message_t) + size];
    (*(T *)msg->data) = data;
  }

  T &operator->() {return *(T *)getData();}
  T &getDataRef() {return *(T *)getData();}

  friend class BasicMUXChannel<T>;
};
#endif

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