GNU Radio 3.5.3.2 C++ API
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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 3, 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., 51 Franklin Street, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 #ifndef INCLUDED_GR_MESSAGE_SOURCE_H 00024 #define INCLUDED_GR_MESSAGE_SOURCE_H 00025 00026 #include <gr_core_api.h> 00027 #include <gr_sync_block.h> 00028 #include <gr_message.h> 00029 #include <gr_msg_queue.h> 00030 00031 class gr_message_source; 00032 typedef boost::shared_ptr<gr_message_source> gr_message_source_sptr; 00033 00034 GR_CORE_API gr_message_source_sptr gr_make_message_source (size_t itemsize, int msgq_limit=0); 00035 GR_CORE_API gr_message_source_sptr gr_make_message_source (size_t itemsize, gr_msg_queue_sptr msgq); 00036 00037 /*! 00038 * \brief Turn received messages into a stream 00039 * \ingroup source_blk 00040 */ 00041 class GR_CORE_API gr_message_source : public gr_sync_block 00042 { 00043 private: 00044 size_t d_itemsize; 00045 gr_msg_queue_sptr d_msgq; 00046 gr_message_sptr d_msg; 00047 unsigned d_msg_offset; 00048 bool d_eof; 00049 00050 friend GR_CORE_API gr_message_source_sptr 00051 gr_make_message_source(size_t itemsize, int msgq_limit); 00052 friend GR_CORE_API gr_message_source_sptr 00053 gr_make_message_source(size_t itemsize, gr_msg_queue_sptr msgq); 00054 00055 protected: 00056 gr_message_source (size_t itemsize, int msgq_limit); 00057 gr_message_source (size_t itemsize, gr_msg_queue_sptr msgq); 00058 00059 public: 00060 ~gr_message_source (); 00061 00062 gr_msg_queue_sptr msgq() const { return d_msgq; } 00063 00064 int work (int noutput_items, 00065 gr_vector_const_void_star &input_items, 00066 gr_vector_void_star &output_items); 00067 }; 00068 00069 #endif /* INCLUDED_GR_MESSAGE_SOURCE_H */