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/* -*- c++ -*- */
/*
* Copyright 2005 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef INCLUDED_GR_MESSAGE_H
#define INCLUDED_GR_MESSAGE_H
#include <gr_types.h>
#include <string>
class gr_message;
typedef boost::shared_ptr<gr_message> gr_message_sptr;
/*!
* \brief public constructor for gr_message
*/
gr_message_sptr
gr_make_message(long type = 0, double arg1 = 0, double arg2 = 0, size_t length = 0);
gr_message_sptr
gr_make_message_from_string(const std::string s, long type = 0, double arg1 = 0, double arg2 = 0);
/*!
* \brief Message class.
*
* \ingroup misc
* The ideas and method names for adjustable message length were
* lifted from the click modular router "Packet" class.
*/
class gr_message {
gr_message_sptr d_next; // link field for msg queue
long d_type; // type of the message
double d_arg1; // optional arg1
double d_arg2; // optional arg2
unsigned char *d_buf_start; // start of allocated buffer
unsigned char *d_msg_start; // where the msg starts
unsigned char *d_msg_end; // one beyond end of msg
unsigned char *d_buf_end; // one beyond end of allocated buffer
gr_message (long type, double arg1, double arg2, size_t length);
friend gr_message_sptr
gr_make_message (long type, double arg1, double arg2, size_t length);
friend gr_message_sptr
gr_make_message_from_string (const std::string s, long type, double arg1, double arg2);
friend class gr_msg_queue;
unsigned char *buf_data() const { return d_buf_start; }
size_t buf_len() const { return d_buf_end - d_buf_start; }
public:
~gr_message ();
long type() const { return d_type; }
double arg1() const { return d_arg1; }
double arg2() const { return d_arg2; }
void set_type(long type) { d_type = type; }
void set_arg1(double arg1) { d_arg1 = arg1; }
void set_arg2(double arg2) { d_arg2 = arg2; }
unsigned char *msg() const { return d_msg_start; }
size_t length() const { return d_msg_end - d_msg_start; }
std::string to_string() const;
};
long gr_message_ncurrently_allocated ();
#endif /* INCLUDED_GR_MESSAGE_H */
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