NS-3 based Named Data Networking (NDN) simulator
ndnSIM: NDN, CCN, CCNx, content centric networks
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ndn-limits-window.cc
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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2011 University of California, Los Angeles
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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: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
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*/
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#include "ndn-limits-window.h"
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#include "ns3/log.h"
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NS_LOG_COMPONENT_DEFINE (
"ndn.Limits.Window"
);
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namespace
ns3 {
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namespace
ndn {
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NS_OBJECT_ENSURE_REGISTERED (LimitsWindow);
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TypeId
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LimitsWindow::GetTypeId ()
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{
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static
TypeId tid = TypeId (
"ns3::ndn::Limits::Window"
)
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.SetGroupName (
"Ndn"
)
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.SetParent <
Limits
> ()
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.AddConstructor <LimitsWindow> ()
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.AddTraceSource (
"CurMaxLimit"
,
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"Current maximum limit"
,
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MakeTraceSourceAccessor (&LimitsWindow::m_curMaxLimit))
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.AddTraceSource (
"Outstanding"
,
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"Number of outstanding interests"
,
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MakeTraceSourceAccessor (&LimitsWindow::m_outstanding))
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;
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return
tid;
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}
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void
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LimitsWindow::UpdateCurrentLimit
(
double
limit)
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{
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NS_ASSERT_MSG (limit >= 0.0,
"Limit should be greater or equal to zero"
);
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m_curMaxLimit = std::min (limit,
GetMaxRate
() *
GetMaxDelay
());
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}
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bool
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LimitsWindow::IsBelowLimit
()
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{
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if
(!
IsEnabled
())
return
true
;
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return
(m_curMaxLimit - m_outstanding >= 1.0);
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}
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void
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LimitsWindow::BorrowLimit
()
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{
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if
(!
IsEnabled
())
return
;
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NS_ASSERT_MSG (m_curMaxLimit - m_outstanding >= 1.0,
"Should not be possible, unless we IsBelowLimit was not checked correctly"
);
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m_outstanding += 1;
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}
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void
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LimitsWindow::ReturnLimit
()
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{
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if
(!
IsEnabled
())
return
;
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NS_ASSERT_MSG (m_outstanding >= (uint32_t)1,
"Should not be possible, unless we decreasing this number twice somewhere"
);
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m_outstanding -= 1;
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FireAvailableSlotCallback ();
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}
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}
// namespace ndn
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}
// namespace ns3
ns3::ndn::LimitsWindow::ReturnLimit
virtual void ReturnLimit()
Decrease current window of outstanding interests.
Definition:
ndn-limits-window.cc:77
ns3::ndn::Limits::IsEnabled
virtual bool IsEnabled() const
Check whether limits are enabled or not.
Definition:
ndn-limits.h:96
ns3::ndn::Limits::Limits
Limits()
Default constructor.
Definition:
ndn-limits.cc:43
ns3::ndn::Limits::GetMaxDelay
virtual double GetMaxDelay() const
Get maximum delay for BDP product for window-based limits.
Definition:
ndn-limits.h:80
ns3::ndn::LimitsWindow::IsBelowLimit
virtual bool IsBelowLimit()
Check if current interest window (number of pending interests) if less than maximum.
Definition:
ndn-limits-window.cc:60
ns3::ndn::Limits::GetMaxRate
virtual double GetMaxRate() const
Get maximum rate that needs to be enforced.
Definition:
ndn-limits.h:71
ns3::ndn::LimitsWindow::BorrowLimit
virtual void BorrowLimit()
Increase current window of outstanding interests.
Definition:
ndn-limits-window.cc:68
ns3::ndn::LimitsWindow::UpdateCurrentLimit
virtual void UpdateCurrentLimit(double limit)
Update a current value of the limit.
Definition:
ndn-limits-window.cc:52
ndnSIM
utils
ndn-limits-window.cc
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