perfect_bloom_filter.hh

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/*
 * Copyright (c) 2019 Inria
 * 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
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#ifndef __BASE_FILTERS_PERFECT_BLOOM_FILTER_HH__
#define __BASE_FILTERS_PERFECT_BLOOM_FILTER_HH__
 
#include <unordered_set>
 
#include "base/filters/base.hh"
 
namespace gem5
{
 
struct BloomFilterPerfectParams;
 
namespace bloom_filter
{

class Perfect : public Base
{
  public:
    Perfect(const BloomFilterPerfectParams &p);
    ~Perfect();
 
    void clear() override;
    void set(Addr addr) override;
    void unset(Addr addr) override;
 
    void merge(const Base* other) override;
    int getCount(Addr addr) const override;
    int getTotalCount() const override;
 
  private:
    std::unordered_set<Addr> entries;
};
 
} // namespace bloom_filter
} // namespace gem5
 
#endif // __BASE_FILTERS_PERFECT_BLOOM_FILTER_HH__