/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2014,  Regents of the University of California,
 *                      Arizona Board of Regents,
 *                      Colorado State University,
 *                      University Pierre & Marie Curie, Sorbonne University,
 *                      Washington University in St. Louis,
 *                      Beijing Institute of Technology,
 *                      The University of Memphis
 *
 * This file is part of NFD (Named Data Networking Forwarding Daemon).
 * See AUTHORS.md for complete list of NFD authors and contributors.
 *
 * NFD 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 of the License, or (at your option) any later version.
 *
 * NFD 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
 * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "scheduler.hpp"
#include "global-io.hpp"

namespace nfd {
namespace scheduler {

static shared_ptr<Scheduler> g_scheduler;

inline Scheduler&
getGlobalScheduler()
{
  if (!static_cast<bool>(g_scheduler)) {
    g_scheduler = make_shared<Scheduler>(ref(getGlobalIoService()));
  }
  return *g_scheduler;
}

EventId
schedule(const time::nanoseconds& after, const Scheduler::Event& event)
{
  return getGlobalScheduler().scheduleEvent(after, event);
}

void
cancel(const EventId& eventId)
{
  getGlobalScheduler().cancelEvent(eventId);
}

void
resetGlobalScheduler()
{
  g_scheduler.reset();
}

ScopedEventId::ScopedEventId()
{
}

ScopedEventId::ScopedEventId(const EventId& event)
  : m_event(event)
{
}

ScopedEventId::ScopedEventId(ScopedEventId&& other)
  : m_event(other.m_event)
{
  other.release();
}

ScopedEventId&
ScopedEventId::operator=(const EventId& event)
{
  if (m_event != event) {
    scheduler::cancel(m_event);
    m_event = event;
  }
  return *this;
}

ScopedEventId::~ScopedEventId()
{
  scheduler::cancel(m_event);
}

void
ScopedEventId::cancel()
{
  scheduler::cancel(m_event);
}

void
ScopedEventId::release()
{
  m_event.reset();
}

} // namespace scheduler
} // namespace nfd