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Diffstat (limited to 'src/base/filters/multi_bloom_filter.cc')
-rw-r--r-- | src/base/filters/multi_bloom_filter.cc | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/base/filters/multi_bloom_filter.cc b/src/base/filters/multi_bloom_filter.cc new file mode 100644 index 000000000..fb64bdf1e --- /dev/null +++ b/src/base/filters/multi_bloom_filter.cc @@ -0,0 +1,121 @@ +/* + * Copyright (c) 2019 Inria + * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Daniel Carvalho + */ + +#include "base/filters/multi_bloom_filter.hh" + +#include "base/logging.hh" +#include "params/BloomFilterMulti.hh" + +namespace BloomFilter { + +Multi::Multi(const BloomFilterMultiParams* p) + : Base(p), filters(p->filters) +{ +} + +Multi::~Multi() +{ +} + +void +Multi::clear() +{ + for (auto& sub_filter : filters) { + sub_filter->clear(); + } +} + +void +Multi::merge(const Base* other) +{ + auto* cast_other = static_cast<const Multi*>(other); + assert(filters.size() == cast_other->filters.size()); + for (int i = 0; i < filters.size(); ++i){ + filters[i]->merge(cast_other->filters[i]); + } +} + +void +Multi::set(Addr addr) +{ + for (auto& sub_filter : filters) { + sub_filter->set(addr); + } +} + +void +Multi::unset(Addr addr) +{ + for (auto& sub_filter : filters) { + sub_filter->unset(addr); + } +} + +bool +Multi::isSet(Addr addr) const +{ + int count = 0; + for (const auto& sub_filter : filters) { + if (sub_filter->isSet(addr)) { + count++; + } + } + return count >= setThreshold; +} + +int +Multi::getCount(Addr addr) const +{ + int count = 0; + for (const auto& sub_filter : filters) { + count += sub_filter->getCount(addr); + } + return count; +} + +int +Multi::getTotalCount() const +{ + int count = 0; + for (const auto& sub_filter : filters) { + count += sub_filter->getTotalCount(); + } + return count; +} + +} // namespace BloomFilter + +BloomFilter::Multi* +BloomFilterMultiParams::create() +{ + return new BloomFilter::Multi(this); +} + |