bm_replacement.h

Go to the documentation of this file.

/*
 * SwatDB
 *
 * @authors: See Contributors.doc for code contributors
 *
 * Copyright (c) 2020,2025 Swarthmore College Computer Science Department
 * Swarthmore PA, Professors Tia Newhall, Ameet Soni
 */
 
#ifndef _SWATDB_BM_REPLACEMENT_H_
#define  _SWATDB_BM_REPLACEMENT_H_
 
#include <utility>
#include "swatdb_types.h"
#include "bufmgr.h"   // need for BufferState stats struct
 
class ReplacementPolicy {
 
 
  public:
    
    virtual ~ReplacementPolicy();
 
    virtual FrameId replace() = 0;
 
    virtual void pin(FrameId frame_id) = 0;
 
    virtual void unpin(FrameId frame_id) = 0;
 
    virtual void freeFrame(FrameId frame_id);
 
    
    virtual void getRepStats(struct BufferState::ReplacementStats *rep_stats);
 
    void printFrame(FrameId frame_id);
 
 
    virtual void printStats() = 0;
 
    void advanceCalls(); 
 
  protected:
 
    virtual RepType _getType() = 0;
 
    void _createFree();
 
    Frame *frame_table;
 
    std::queue<FrameId> free;
 
    std::uint64_t rep_calls;
 
    double avg_frames_checked;
 
 
    std::uint64_t new_page_calls; 
 
};
 
#endif