00001 /* 00002 * BandwidthTimeFilter.h : part of the Mace toolkit for building distributed systems 00003 * 00004 * Copyright (c) 2007, Charles Killian, Dejan Kostic, Ryan Braud, James W. Anderson, John Fisher-Ogden, Calvin Hubble, Duy Nguyen, Justin Burke, David Oppenheimer, Amin Vahdat, Adolfo Rodriguez, Sooraj Bhat 00005 * All rights reserved. 00006 * 00007 * Redistribution and use in source and binary forms, with or without 00008 * modification, are permitted provided that the following conditions are met: 00009 * 00010 * * Redistributions of source code must retain the above copyright 00011 * notice, this list of conditions and the following disclaimer. 00012 * * Redistributions in binary form must reproduce the above copyright 00013 * notice, this list of conditions and the following disclaimer in 00014 * the documentation and/or other materials provided with the 00015 * distribution. 00016 * * Neither the names of Duke University nor The University of 00017 * California, San Diego, nor the names of the authors or contributors 00018 * may be used to endorse or promote products derived from 00019 * this software without specific prior written permission. 00020 * 00021 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00022 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00023 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00024 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 00025 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00026 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 00027 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 00028 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00029 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE 00030 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 * 00032 * ----END-OF-LEGAL-STUFF---- */ 00033 #ifndef _BANDWIDTH_TIME_FILTER 00034 #define _BANDWIDTH_TIME_FILTER 00035 00036 #include "GenericFilter.h" 00037 #include <list> 00038 #include <pthread.h> 00039 00046 class BandwidthTriplet { 00047 public: 00048 BandwidthTriplet(double start1, double stop1, int size1) 00049 : size(size1), start(start1), stop(stop1) {} 00050 int size; 00051 double start, stop; 00052 }; 00053 00063 class BandwidthTimeFilter : public GenericFilter { 00064 00065 protected: 00066 std::list<BandwidthTriplet> history; 00067 double window; 00068 00069 public: 00070 static const double DEFAULT_BANDWIDTH_WINDOW = 2.5; 00071 00072 BandwidthTimeFilter(double window = DEFAULT_BANDWIDTH_WINDOW); 00073 virtual ~BandwidthTimeFilter(); 00074 void startUpdate(); 00075 void update(int size); 00076 void finishUpdate(); 00077 void cancelEntry(); 00078 void clear(); 00079 double getValue(); 00080 00081 protected: 00082 void check(); 00083 }; 00084 00087 #endif // _BANDWIDTH_TIME_FILTER