GNU Radio 2.x: gr_message_source.h Source File

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# gr_message_source.h

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    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2005 Free Software Foundation, Inc.
    00004  *
    00005  * This file is part of GNU Radio
    00006  *
    00007  * GNU Radio is free software; you can redistribute it and/or modify
    00008  * it under the terms of the GNU General Public License as published by
    00009  * the Free Software Foundation; either version 2, or (at your option)
    00010  * any later version.
    00011  *
    00012  * GNU Radio is distributed in the hope that it will be useful,
    00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015  * GNU General Public License for more details.
    00016  *
    00017  * You should have received a copy of the GNU General Public License
    00018  * along with GNU Radio; see the file COPYING.  If not, write to
    00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023 #ifndef INCLUDED_GR_MESSAGE_SOURCE_H
    00024 #define INCLUDED_GR_MESSAGE_SOURCE_H
    00025
    00026 #include <gr_sync_block.h>
    00027 #include <gr_message.h>
    00028 #include <gr_msg_queue.h>
    00029
    00030 class gr_message_source;
    00031 typedef boost::shared_ptr<gr_message_source> gr_message_source_sptr;
    00032
    00033 gr_message_source_sptr gr_make_message_source (size_t itemsize, int msgq_limit=0);
    00034
    00039 class gr_message_source : public gr_sync_block
    00040 {
    00041  private:
    00042   size_t                d_itemsize;
    00043   gr_msg_queue_sptr     d_msgq;
    00044   gr_message_sptr       d_msg;
    00045   unsigned              d_msg_offset;
    00046   bool                  d_eof;
    00047
    00048   friend gr_message_source_sptr
    00049   gr_make_message_source(size_t itemsize, int msgq_limit);
    00050
    00051  protected:
    00052   gr_message_source (size_t itemsize, int msgq_limit);
    00053
    00054  public:
    00055   ~gr_message_source ();
    00056
    00057   gr_msg_queue_sptr     msgq() const { return d_msgq; }
    00058
    00059   int work (int noutput_items,
    00060             gr_vector_const_void_star &input_items,
    00061             gr_vector_void_star &output_items);
    00062 };
    00063
    00064 #endif /* INCLUDED_GR_MESSAGE_SOURCE_H */