block_bloom_filter.hh revision 14262
114262Sodanrc@yahoo.com.br/* 214262Sodanrc@yahoo.com.br * Copyright (c) 2019 Inria 314262Sodanrc@yahoo.com.br * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 414262Sodanrc@yahoo.com.br * All rights reserved. 514262Sodanrc@yahoo.com.br * 614262Sodanrc@yahoo.com.br * Redistribution and use in source and binary forms, with or without 714262Sodanrc@yahoo.com.br * modification, are permitted provided that the following conditions are 814262Sodanrc@yahoo.com.br * met: redistributions of source code must retain the above copyright 914262Sodanrc@yahoo.com.br * notice, this list of conditions and the following disclaimer; 1014262Sodanrc@yahoo.com.br * redistributions in binary form must reproduce the above copyright 1114262Sodanrc@yahoo.com.br * notice, this list of conditions and the following disclaimer in the 1214262Sodanrc@yahoo.com.br * documentation and/or other materials provided with the distribution; 1314262Sodanrc@yahoo.com.br * neither the name of the copyright holders nor the names of its 1414262Sodanrc@yahoo.com.br * contributors may be used to endorse or promote products derived from 1514262Sodanrc@yahoo.com.br * this software without specific prior written permission. 1614262Sodanrc@yahoo.com.br * 1714262Sodanrc@yahoo.com.br * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1814262Sodanrc@yahoo.com.br * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1914262Sodanrc@yahoo.com.br * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2014262Sodanrc@yahoo.com.br * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2114262Sodanrc@yahoo.com.br * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2214262Sodanrc@yahoo.com.br * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2314262Sodanrc@yahoo.com.br * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2414262Sodanrc@yahoo.com.br * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2514262Sodanrc@yahoo.com.br * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2614262Sodanrc@yahoo.com.br * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2714262Sodanrc@yahoo.com.br * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2814262Sodanrc@yahoo.com.br * 2914262Sodanrc@yahoo.com.br * Authors: Daniel Carvalho 3014262Sodanrc@yahoo.com.br */ 3114262Sodanrc@yahoo.com.br 3214262Sodanrc@yahoo.com.br#ifndef __BASE_FILTERS_BLOCK_BLOOM_FILTER_HH__ 3314262Sodanrc@yahoo.com.br#define __BASE_FILTERS_BLOCK_BLOOM_FILTER_HH__ 3414262Sodanrc@yahoo.com.br 3514262Sodanrc@yahoo.com.br#include <vector> 3614262Sodanrc@yahoo.com.br 3714262Sodanrc@yahoo.com.br#include "base/filters/base.hh" 3814262Sodanrc@yahoo.com.br 3914262Sodanrc@yahoo.com.brstruct BloomFilterBlockParams; 4014262Sodanrc@yahoo.com.br 4114262Sodanrc@yahoo.com.brnamespace BloomFilter { 4214262Sodanrc@yahoo.com.br 4314262Sodanrc@yahoo.com.br/** 4414262Sodanrc@yahoo.com.br * Simple deletable (with false negatives) bloom filter that extracts 4514262Sodanrc@yahoo.com.br * bitfields of an address to use as indexes of the filter vector. 4614262Sodanrc@yahoo.com.br */ 4714262Sodanrc@yahoo.com.brclass Block : public Base 4814262Sodanrc@yahoo.com.br{ 4914262Sodanrc@yahoo.com.br public: 5014262Sodanrc@yahoo.com.br Block(const BloomFilterBlockParams* p); 5114262Sodanrc@yahoo.com.br ~Block(); 5214262Sodanrc@yahoo.com.br 5314262Sodanrc@yahoo.com.br void set(Addr addr) override; 5414262Sodanrc@yahoo.com.br void unset(Addr addr) override; 5514262Sodanrc@yahoo.com.br int getCount(Addr addr) const override; 5614262Sodanrc@yahoo.com.br 5714262Sodanrc@yahoo.com.br private: 5814262Sodanrc@yahoo.com.br /** 5914262Sodanrc@yahoo.com.br * XOR hash between bitfields of an address, provided by the mask vector. 6014262Sodanrc@yahoo.com.br * 6114262Sodanrc@yahoo.com.br * @param addr The address to be hashed. 6214262Sodanrc@yahoo.com.br * @return The value of the XOR of the masked bitfields of the address. 6314262Sodanrc@yahoo.com.br */ 6414262Sodanrc@yahoo.com.br int hash(Addr addr) const; 6514262Sodanrc@yahoo.com.br 6614262Sodanrc@yahoo.com.br /** Position of the LSB of each mask. */ 6714262Sodanrc@yahoo.com.br std::vector<unsigned> masksLSBs; 6814262Sodanrc@yahoo.com.br 6914262Sodanrc@yahoo.com.br /** Number of bits in each mask. */ 7014262Sodanrc@yahoo.com.br std::vector<unsigned> masksSizes; 7114262Sodanrc@yahoo.com.br}; 7214262Sodanrc@yahoo.com.br 7314262Sodanrc@yahoo.com.br} // namespace BloomFilter 7414262Sodanrc@yahoo.com.br 7514262Sodanrc@yahoo.com.br#endif // __BASE_FILTERS_BLOCK_BLOOM_FILTER_HH__ 76