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/* -*- c++ -*- */
/*
* Copyright 2004,2009-2011,2013 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_GR_RUNTIME_BUFFER_READER_SM_H
#define INCLUDED_GR_RUNTIME_BUFFER_READER_SM_H
#include <gnuradio/api.h>
#include <gnuradio/buffer.h>
#include <gnuradio/buffer_reader.h>
#include <gnuradio/logger.h>
#include <gnuradio/runtime_types.h>
#include <gnuradio/tags.h>
#include <gnuradio/thread/thread.h>
#include <boost/weak_ptr.hpp>
#include <map>
#include <memory>
namespace gr {
class GR_RUNTIME_API buffer_reader_sm : public buffer_reader
{
public:
~buffer_reader_sm();
/*!
* \brief Return number of items available for reading.
*/
virtual int items_available(); // const
/*!
* \brief Return true if thread is ready to call input_blocked_callback,
* false otherwise
*/
virtual bool input_blkd_cb_ready(int items_required) const;
/*!
* \brief Callback function that the scheduler will call when it determines
* that the input is blocked
*/
virtual bool input_blocked_callback(int items_required, int items_avail);
private:
friend class buffer;
friend class buffer_double_mapped;
friend class buffer_single_mapped;
friend GR_RUNTIME_API buffer_reader_sptr buffer_add_reader(buffer_sptr buf,
int nzero_preload,
block_sptr link,
int delay);
//! constructor is private. Use gr::buffer::add_reader to create instances
buffer_reader_sm(buffer_sptr buffer, unsigned int read_index, block_sptr link);
};
} // namespace gr
#endif /* INCLUDED_GR_RUNTIME_BUFFER_READER_SM_H */
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