1 files changed, 89 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/runtime/gr_message.h b/gnuradio-core/src/lib/runtime/gr_message.h
new file mode 100644
index 000000000..272a82ee4
--- /dev/null
+++ b/gnuradio-core/src/lib/runtime/gr_message.h
@@ -0,0 +1,89 @@
+/* -*- 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 2, 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, 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.
+ *
+ * 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 */