blob: 95c221b3ca786e91dbc0e851cbc389a1464891c3 [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-window.h"
#include "ns3/log.h"
NS_LOG_COMPONENT_DEFINE ("ndn.Limits.Window");
namespace ns3 {
namespace ndn {
NS_OBJECT_ENSURE_REGISTERED (LimitsWindow);
TypeId
LimitsWindow::GetTypeId ()
{
static TypeId tid = TypeId ("ns3::ndn::Limits::Window")
.SetGroupName ("Ndn")
.SetParent <Limits> ()
.AddConstructor <LimitsWindow> ()
.AddTraceSource ("CurMaxLimit",
"Current maximum limit",
MakeTraceSourceAccessor (&LimitsWindow::m_curMaxLimit))
.AddTraceSource ("Outstanding",
"Number of outstanding interests",
MakeTraceSourceAccessor (&LimitsWindow::m_outstanding))
;
return tid;
}
void
LimitsWindow::UpdateCurrentLimit (double limit)
{
NS_ASSERT_MSG (limit >= 0.0, "Limit should be greater or equal to zero");
m_curMaxLimit = std::min (limit, GetMaxRate () * GetMaxDelay ());
}
bool
LimitsWindow::IsBelowLimit ()
{
if (!IsEnabled ()) return true;
return (m_curMaxLimit - m_outstanding >= 1.0);
}
void
LimitsWindow::BorrowLimit ()
{
if (!IsEnabled ()) return;
NS_ASSERT_MSG (m_curMaxLimit - m_outstanding >= 1.0, "Should not be possible, unless we IsBelowLimit was not checked correctly");
m_outstanding += 1;
}
void
LimitsWindow::ReturnLimit ()
{
if (!IsEnabled ()) return;
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