92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
/* -*- c++ -*- */
|
|
/*
|
|
* Copyright 2004 Free Software Foundation, Inc.
|
|
*
|
|
* This file is part of GNU Radio
|
|
*
|
|
* GNU Radio is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* GNU Radio is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GNU Radio; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
#ifndef INCLUDED_REPEATER_PIPE_H
|
|
#define INCLUDED_REPEATER_PIPE_H
|
|
|
|
#include <gr_sync_block.h>
|
|
|
|
class repeater_pipe;
|
|
|
|
/*
|
|
* We use boost::shared_ptr's instead of raw pointers for all access
|
|
* to gr_blocks (and many other data structures). The shared_ptr gets
|
|
* us transparent reference counting, which greatly simplifies storage
|
|
* management issues. This is especially helpful in our hybrid
|
|
* C++ / Python system.
|
|
*
|
|
* See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
|
|
*
|
|
* As a convention, the _sptr suffix indicates a boost::shared_ptr
|
|
*/
|
|
typedef boost::shared_ptr<repeater_pipe> repeater_pipe_sptr;
|
|
|
|
/*!
|
|
* \brief Return a shared_ptr to a new instance of repeater_pipe.
|
|
*
|
|
* To avoid accidental use of raw pointers, repeater_pipe's
|
|
* constructor is private. repeater_make_pipe is the public
|
|
* interface for creating new instances.
|
|
*/
|
|
repeater_pipe_sptr repeater_make_pipe (size_t input_size, size_t output_size, const char* pathname, float io_ratio);
|
|
|
|
/*!
|
|
* \brief plumbing: OS interface
|
|
* \ingroup block
|
|
*
|
|
* This uses the preferred technique: subclassing gr_sync_block.
|
|
*/
|
|
|
|
class repeater_pipe : public gr_block
|
|
{
|
|
private:
|
|
// The friend declaration allows repeater_make_pipe to
|
|
// access the private constructor.
|
|
|
|
friend repeater_pipe_sptr repeater_make_pipe (size_t input_size, size_t output_size, const char* pathname, float io_ratio);
|
|
|
|
repeater_pipe (size_t input_size, size_t output_size, const char* pathname, float io_ratio); // private constructor
|
|
|
|
size_t d_input_size;
|
|
size_t d_output_size;
|
|
float d_io_ratio;
|
|
const char* d_pathname;
|
|
pid_t d_pid;
|
|
int pipe_fd_in[2];
|
|
int pipe_fd_out[2];
|
|
int d_e_in;
|
|
int d_e_out;
|
|
|
|
public:
|
|
virtual void forecast(int nof_output_items, gr_vector_int &nof_input_items_reqd);
|
|
~repeater_pipe (); // public destructor
|
|
|
|
// Where all the action really happens
|
|
|
|
int general_work (int noutput_items,
|
|
gr_vector_int &ninput_items,
|
|
gr_vector_const_void_star &input_items,
|
|
gr_vector_void_star &output_items);
|
|
|
|
};
|
|
|
|
#endif /* INCLUDED_REPEATER_PIPE_H */
|