bm_frame.h

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/*
 * 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_FRAME_H_
#define  _SWATDB_BM_FRAME_H_
 
#include <utility>
#include <mutex>
#include "swatdb_types.h"
 
 
class Frame {
 
  friend class BufferManager;
  friend class ReplacementPolicy;
  friend class Clock;
  friend class Random;
 
// @@@@ SWATDB_ASSIGNMENT: CUT_START
#ifndef BUFMGR_LAB_SOL_OMIT
  friend class LRU;
  friend class MRU;
  friend class ClockRandom;
#endif
// @@@@ SWATDB_ASSIGNMENT: CUT_END
 
 
  public:
 
    Frame();
 
    ~Frame();
 
    void resetFrame();
 
    void loadFrame(PageId page_id);
 
  private:
 
    PageId page_id;
 
    int pin_count;
 
    bool valid;
 
    bool dirty;
 
// @@@@ SWATDB_ASSIGNMENT: CUT_START
    std::mutex frame_mtx;
// @@@@ SWATDB_ASSIGNMENT: CUT_END
};
 
#endif