GNU Radio 3.6.1 C++ API
gr_head.h
Go to the documentation of this file.
1
/* -*- c++ -*- */
2
/*
3
* Copyright 2004,2009,2012 Free Software Foundation, Inc.
4
*
5
* This file is part of GNU Radio
6
*
7
* GNU Radio is free software; you can redistribute it and/or modify
8
* it under the terms of the GNU General Public License as published by
9
* the Free Software Foundation; either version 3, or (at your option)
10
* any later version.
11
*
12
* GNU Radio is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15
* GNU General Public License for more details.
16
*
17
* You should have received a copy of the GNU General Public License
18
* along with GNU Radio; see the file COPYING. If not, write to
19
* the Free Software Foundation, Inc., 51 Franklin Street,
20
* Boston, MA 02110-1301, USA.
21
*/
22
23
#ifndef INCLUDED_GR_HEAD_H
24
#define INCLUDED_GR_HEAD_H
25
26
#include <
gr_core_api.h
>
27
#include <
gr_sync_block.h
>
28
#include <stddef.h>
// size_t
29
30
class
gr_head
;
31
typedef
boost::shared_ptr<gr_head>
gr_head_sptr
;
32
33
/*!
34
* \brief copies the first N items to the output then signals done
35
* \ingroup slicedice_blk
36
*
37
* Useful for building test cases
38
*/
39
40
class
GR_CORE_API
gr_head
:
public
gr_sync_block
41
{
42
friend
GR_CORE_API
gr_head_sptr
gr_make_head
(
size_t
sizeof_stream_item,
unsigned
long
long
nitems);
43
gr_head
(
size_t
sizeof_stream_item,
unsigned
long
long
nitems);
44
45
unsigned
long
long
d_nitems;
46
unsigned
long
long
d_ncopied_items;
47
48
public
:
49
int
work
(
int
noutput_items,
50
gr_vector_const_void_star
&input_items,
51
gr_vector_void_star
&output_items);
52
53
void
reset
() { d_ncopied_items = 0; }
54
void
set_length
(
int
nitems) { d_nitems = nitems; }
55
};
56
57
GR_CORE_API
gr_head_sptr
58
gr_make_head
(
size_t
sizeof_stream_item,
unsigned
long
long
nitems);
59
60
61
#endif
/* INCLUDED_GR_HEAD_H */
gnuradio-core
src
lib
general
gr_head.h
Generated on Mon Aug 6 2012 11:12:53 for GNU Radio 3.6.1 C++ API by
1.8.1.2