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

/*

 * Copyright 2006,2007 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_RUNTIME_IMPL_H

#define INCLUDED_GR_RUNTIME_IMPL_H

#include <gr_runtime_types.h>

#include <gr_block.h>

#include <omnithread.h>

#include <gr_single_threaded_scheduler.h>

// omnithread calls delete on itself after thread exits, so can't use shared ptr

class gr_scheduler_thread;

typedef std::vector<gr_scheduler_thread *> gr_scheduler_thread_vector_t;

typedef gr_scheduler_thread_vector_t::iterator gr_scheduler_thread_viter_t;

/*!

 *\brief A single thread of execution for the scheduler

 *

 * This class implements a single thread that runs undetached, and

 * invokes the single-threaded block scheduler.  The runtime makes

 * one of these for each distinct partition of a flowgraph and runs

 * them in parallel.

 *

 */

class gr_scheduler_thread : public omni_thread

{

private:

  gr_single_threaded_scheduler_sptr d_sts;    

public:

  gr_scheduler_thread(gr_block_vector_t graph);

  ~gr_scheduler_thread();

  virtual void *run_undetached(void *arg);

  void start();

  void stop();

};

/*!

 *\brief Implementation details of gr_runtime

 *

 * The actual implementation of gr_runtime. Separate class allows

 * decoupling of changes from dependent classes.

 *

 */

class gr_runtime_impl

{

private:

  gr_runtime_impl(gr_hier_block2_sptr top_block, gr_runtime *owner);

  friend void runtime_sigint_handler(int signum);

  friend class gr_runtime;

  bool                           d_running;

  gr_hier_block2_sptr            d_top_block;

  gr_flat_flowgraph_sptr         d_ffg;

  std::vector<gr_basic_block_vector_t> d_graphs;

  gr_scheduler_thread_vector_t   d_threads;

  gr_runtime                    *d_owner;

  int                            d_lock_count;

  omni_mutex                     d_reconf;

  void start();

  void start_threads();

  void stop();

  void wait();

  void restart();

  void lock();

  void unlock();

public:

  ~gr_runtime_impl();

};

#endif /* INCLUDED_GR_RUNTIME_IMPL_H */