GNU Radio Manual and C++ API Reference  3.10.9.1
The Free & Open Software Radio Ecosystem
null_source.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2004,2010,2013 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * SPDX-License-Identifier: GPL-3.0-or-later
8  *
9  */
10 
11 #ifndef INCLUDED_GR_NULL_SOURCE_H
12 #define INCLUDED_GR_NULL_SOURCE_H
13 
14 #include <gnuradio/blocks/api.h>
15 #include <gnuradio/sync_block.h>
16 
17 namespace gr {
18 namespace blocks {
19 
20 /*!
21  * \brief A source of zeros used mainly for testing.
22  * \ingroup misc_blk
23  */
24 class BLOCKS_API null_source : virtual public sync_block
25 {
26 public:
27  // gr::blocks::null_source::sptr
28  typedef std::shared_ptr<null_source> sptr;
29 
30  /*!
31  * Build a null source block.
32  *
33  * \param sizeof_stream_item size of the stream items in bytes.
34  */
35  static sptr make(size_t sizeof_stream_item);
36 };
37 
38 } /* namespace blocks */
39 } /* namespace gr */
40 
41 #endif /* INCLUDED_GR_NULL_SOURCE_H */
A source of zeros used mainly for testing.
Definition: null_source.h:25
static sptr make(size_t sizeof_stream_item)
std::shared_ptr< null_source > sptr
Definition: null_source.h:28
synchronous 1:1 input to output with history
Definition: sync_block.h:26
#define BLOCKS_API
Definition: gr-blocks/include/gnuradio/blocks/api.h:18
GNU Radio logging wrapper.
Definition: basic_block.h:29