blob: 2e4a9ec447c3fd04275fe08eec571ee26bc45f87 [file] [log] [blame]
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2011 University of California, Los Angeles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#include "ndn-limits.h"
#include "ns3/log.h"
#include "ns3/simulator.h"
#include "ns3/random-variable.h"
NS_LOG_COMPONENT_DEFINE ("ndn.Limits");
namespace ns3 {
namespace ndn {
NS_OBJECT_ENSURE_REGISTERED (Limits);
TypeId
Limits::GetTypeId ()
{
static TypeId tid = TypeId ("ns3::ndn::Limits")
.SetGroupName ("Ndn")
.SetParent <Object> ()
.AddConstructor <Limits> ()
.AddTraceSource ("CurMaxLimit",
"Current maximum limit",
MakeTraceSourceAccessor (&Limits::m_curMaxLimit))
.AddTraceSource ("Outstanding",
"Number of outstanding interests",
MakeTraceSourceAccessor (&Limits::m_outstanding))
;
return tid;
}
void
Limits::SetMaxLimit (double max)
{
m_maxLimit = max;
m_curMaxLimit = max;
}
double
Limits::GetMaxLimit () const
{
return m_maxLimit;
}
void
Limits::UpdateCurrentLimit (double limit)
{
NS_ASSERT_MSG (limit >= 0.0, "Limit should be greater or equal to zero");
m_curMaxLimit = std::min (limit, m_maxLimit);
}
bool
Limits::IsBelowLimit ()
{
if (!IsEnabled ()) return true;
if (m_curMaxLimit - m_outstanding >= 1.0)
{
// static UniformVariable acceptanceProbability (0, m_curMaxLimit);
// double value = acceptanceProbability.GetValue ();
double value = m_outstanding + 1;
if (m_outstanding < value)
{
m_outstanding += 1.0;
return true;
}
else
return false;
}
else
return false;
}
void
Limits::RemoveOutstanding ()
{
if (!IsEnabled ()) return;
NS_LOG_DEBUG (m_outstanding);
NS_ASSERT_MSG (m_outstanding >= (uint32_t)1, "Should not be possible, unless we decreasing this number twice somewhere");
m_outstanding -= 1;
}
} // namespace ndn
} // namespace ns3