/* -*- c++ -*- */

/*

 * Copyright 2007 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 3, 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., 51 Franklin Street,

 * Boston, MA 02110-1301, USA.

 */

#ifndef INCLUDED_GR_TOP_BLOCK_IMPL_H

#define INCLUDED_GR_TOP_BLOCK_IMPL_H

#include <gr_scheduler_thread.h>

/*!

 *\brief Implementation details of gr_top_block

 *

 * \ingroup internal

 * The actual implementation of gr_top_block. Separate class allows

 * decoupling of changes from dependent classes.

 *

 */

class gr_top_block_impl

{

public:

  gr_top_block_impl(gr_top_block *owner);

  ~gr_top_block_impl();

  // Create and start scheduler threads

  void start();

  // Signal scheduler threads to stop

  void stop();

  // Wait for scheduler threads to exit

  void wait();

  // Lock the top block to allow reconfiguration

  void lock();

  // Unlock the top block at end of reconfiguration

  void unlock();

  // Return true if flowgraph is running

  bool is_running() const { return d_running; }

private:

  bool                           d_running;

  gr_flat_flowgraph_sptr         d_ffg;

  gr_scheduler_thread_vector_t   d_threads;

  gr_top_block                  *d_owner;

  int                            d_lock_count;

  omni_mutex                     d_reconf;

  std::vector<gr_basic_block_vector_t> d_graphs;

  void start_threads();

  void restart();

};

#endif /* INCLUDED_GR_TOP_BLOCK_IMPL_H */