Watchdog.h

/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * Watchdog.h
 * Copyright (C) 2015 Simon Newton
 */

#ifndef INCLUDE_OLA_UTIL_WATCHDOG_H_
#define INCLUDE_OLA_UTIL_WATCHDOG_H_

#include <ola/Callback.h>
#include <ola/thread/Mutex.h>
#include <memory>

namespace ola {

class Watchdog {
 public:
  Watchdog(unsigned int cycle_limit, Callback0<void> *reset_callback);

  void Enable();

  void Disable();

  void Kick();

  void Clock();

 private:
  const unsigned int m_limit;
  std::auto_ptr<Callback0<void> > m_callback;
  ola::thread::Mutex m_mu;
  bool m_enabled;  // GUARDED_BY(m_mu);
  unsigned int m_count;  // GUARDED_BY(m_mu);
  bool m_fired;  // GUARDED_BY(m_mu);
};
}  // namespace ola
#endif  // INCLUDE_OLA_UTIL_WATCHDOG_H_