GNU Radio 3.5.3.2 C++ API
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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2004,2010 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_NOP_H 00024 #define INCLUDED_GR_NOP_H 00025 00026 #include <gr_core_api.h> 00027 #include <gr_block.h> 00028 #include <stddef.h> // size_t 00029 00030 class gr_nop; 00031 typedef boost::shared_ptr<gr_nop> gr_nop_sptr; 00032 00033 GR_CORE_API gr_nop_sptr 00034 gr_make_nop (size_t sizeof_stream_item); 00035 00036 /*! 00037 * \brief Does nothing. Used for testing only. 00038 * \ingroup misc_blk 00039 */ 00040 class GR_CORE_API gr_nop : public gr_block 00041 { 00042 friend GR_CORE_API gr_nop_sptr gr_make_nop (size_t sizeof_stream_item); 00043 gr_nop (size_t sizeof_stream_item); 00044 00045 protected: 00046 int d_nmsgs_recvd; 00047 00048 // Method that just counts any received messages. 00049 void count_received_msgs(pmt::pmt_t msg); 00050 00051 public: 00052 virtual int general_work (int noutput_items, 00053 gr_vector_int &ninput_items, 00054 gr_vector_const_void_star &input_items, 00055 gr_vector_void_star &output_items); 00056 00057 int nmsgs_received() const { return d_nmsgs_recvd; } 00058 00059 }; 00060 00061 #endif /* INCLUDED_GR_NOP_H */