author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Sat, 04 Jul 2009 08:15:48 +0200 | |
changeset 4654 | 2eaebe77d66b |
parent 1878 | f947cd18f0bb |
permissions | -rw-r--r-- |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2007 INESC Porto |
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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: Gustavo J. A. M. Carneiro <gjc@inescporto.pt> |
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*/ |
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#include "event-garbage-collector.h" |
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|
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#define CLEANUP_CHUNK_MIN_SIZE 8 |
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#define CLEANUP_CHUNK_MAX_SIZE 128 |
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|
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|
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namespace ns3 { |
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|
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|
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EventGarbageCollector::EventGarbageCollector () : |
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m_nextCleanupSize (CLEANUP_CHUNK_MIN_SIZE) |
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{} |
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|
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void |
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EventGarbageCollector::Track (EventId event) |
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{ |
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m_events.insert (event); |
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if (m_events.size () >= m_nextCleanupSize) |
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Cleanup (); |
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} |
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|
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void |
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EventGarbageCollector::Grow () |
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{ |
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m_nextCleanupSize += (m_nextCleanupSize < CLEANUP_CHUNK_MAX_SIZE? |
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m_nextCleanupSize : CLEANUP_CHUNK_MAX_SIZE); |
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} |
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|
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void |
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EventGarbageCollector::Shrink () |
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{ |
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while (m_nextCleanupSize > m_events.size ()) |
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m_nextCleanupSize >>= 1; |
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Grow (); |
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} |
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|
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// Called when a new event was added and the cleanup limit was exceeded in consequence. |
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void |
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EventGarbageCollector::Cleanup () |
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{ |
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for (EventList::iterator iter = m_events.begin (); iter != m_events.end ();) |
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{ |
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if ((*iter).IsExpired ()) |
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{ |
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m_events.erase (iter++); |
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} |
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else |
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break; // EventIds are sorted by timestamp => further events are not expired for sure |
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} |
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|
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// If after cleanup we are still over the limit, increase the limit. |
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if (m_events.size () >= m_nextCleanupSize) |
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Grow (); |
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else |
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Shrink (); |
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} |
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EventGarbageCollector::~EventGarbageCollector () |
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{ |
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for (EventList::iterator event = m_events.begin (); |
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event != m_events.end (); event++) |
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{ |
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Simulator::Cancel (*event); |
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} |
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} |
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}; // namespace ns3 |
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#ifdef RUN_SELF_TESTS |
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#include "ns3/test.h" |
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namespace ns3 { |
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class EventGarbageCollectorTests : public Test |
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{ |
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int m_counter; |
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EventGarbageCollector *m_events; |
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void EventGarbageCollectorCallback (); |
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public: |
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|
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EventGarbageCollectorTests (); |
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virtual ~EventGarbageCollectorTests (); |
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virtual bool RunTests (void); |
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}; |
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EventGarbageCollectorTests::EventGarbageCollectorTests () |
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: Test ("EventGarbageCollector"), m_counter (0), m_events (0) |
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{} |
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|
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EventGarbageCollectorTests::~EventGarbageCollectorTests () |
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{} |
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|
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void |
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EventGarbageCollectorTests::EventGarbageCollectorCallback () |
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120 |
{ |
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m_counter++; |
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if (m_counter == 50) |
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{ |
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// this should cause the remaining (50) events to be cancelled |
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delete m_events; |
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m_events = 0; |
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} |
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} |
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129 |
|
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bool EventGarbageCollectorTests::RunTests (void) |
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{ |
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bool result = true; |
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133 |
|
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m_events = new EventGarbageCollector (); |
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135 |
|
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for (int n = 0; n < 100; n++) |
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{ |
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m_events->Track (Simulator::Schedule |
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(Simulator::Now (), |
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&EventGarbageCollectorTests::EventGarbageCollectorCallback, |
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this)); |
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} |
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Simulator::Run (); |
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NS_TEST_ASSERT_EQUAL (m_events, 0); |
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NS_TEST_ASSERT_EQUAL (m_counter, 50); |
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return result; |
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} |
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148 |
|
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static EventGarbageCollectorTests g_eventCollectorTests; |
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150 |
|
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}; |
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152 |
|
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153 |
#endif /* RUN_SELF_TESTS */ |