173 lines
3.2 KiB
C++
173 lines
3.2 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2007 INRIA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#include "timer.h"
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#include "simulator.h"
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#include "simulation-singleton.h"
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namespace ns3 {
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Timer::Timer ()
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: m_flags (CHECK_ON_DESTROY),
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m_delay (FemtoSeconds (0)),
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m_event (),
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m_impl (0)
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{
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}
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Timer::Timer (enum DestroyPolicy destroyPolicy)
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: m_flags (destroyPolicy),
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m_delay (FemtoSeconds (0)),
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m_event (),
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m_impl (0)
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{
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}
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Timer::~Timer ()
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{
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if (m_flags & CHECK_ON_DESTROY)
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{
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if (m_event.IsRunning ())
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{
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NS_FATAL_ERROR ("Event is still running while destroying.");
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}
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}
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else if (m_flags & CANCEL_ON_DESTROY)
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{
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m_event.Cancel ();
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}
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else if (m_flags & REMOVE_ON_DESTROY)
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{
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Simulator::Remove (m_event);
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}
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delete m_impl;
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}
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void
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Timer::SetDelay (const Time &time)
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{
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m_delay = time;
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}
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Time
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Timer::GetDelay (void) const
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{
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return m_delay;
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}
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Time
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Timer::GetDelayLeft (void) const
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{
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switch (GetState ())
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{
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case Timer::RUNNING:
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return Simulator::GetDelayLeft (m_event);
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break;
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case Timer::EXPIRED:
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return TimeStep (0);
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break;
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case Timer::SUSPENDED:
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return m_delayLeft;
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break;
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default:
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NS_ASSERT (false);
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return TimeStep (0);
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break;
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}
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}
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void
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Timer::Cancel (void)
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{
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Simulator::Cancel (m_event);
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}
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void
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Timer::Remove (void)
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{
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Simulator::Remove (m_event);
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}
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bool
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Timer::IsExpired (void) const
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{
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return !IsSuspended () && m_event.IsExpired ();
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}
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bool
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Timer::IsRunning (void) const
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{
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return !IsSuspended () && m_event.IsRunning ();
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}
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bool
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Timer::IsSuspended (void) const
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{
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return (m_flags & TIMER_SUSPENDED) == TIMER_SUSPENDED;
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}
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enum Timer::State
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Timer::GetState (void) const
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{
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if (IsRunning ())
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{
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return Timer::RUNNING;
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}
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else if (IsExpired ())
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{
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return Timer::EXPIRED;
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}
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else
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{
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NS_ASSERT (IsSuspended ());
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return Timer::SUSPENDED;
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}
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}
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void
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Timer::Schedule (void)
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{
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Schedule (m_delay);
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}
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void
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Timer::Schedule (Time delay)
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{
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NS_ASSERT (m_impl != 0);
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if (m_event.IsRunning ())
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{
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NS_FATAL_ERROR ("Event is still running while re-scheduling.");
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}
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m_event = m_impl->Schedule (delay);
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}
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void
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Timer::Suspend (void)
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{
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NS_ASSERT (IsRunning ());
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m_delayLeft = Simulator::GetDelayLeft (m_event);
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Simulator::Remove (m_event);
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m_flags |= TIMER_SUSPENDED;
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}
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void
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Timer::Resume (void)
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{
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NS_ASSERT (m_flags & TIMER_SUSPENDED);
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m_event = m_impl->Schedule (m_delayLeft);
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m_flags &= ~TIMER_SUSPENDED;
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}
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} // namespace ns3
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