blockheapfilescanner.h

Go to the documentation of this file.

/*
 * SwatDB
 *
 * @authors: See Contributors.doc for code contributors
 *
 * Copyright (c) 2020 Swarthmore College Computer Science Department
 * Swarthmore PA, Professors Tia Newhall, Ameet Soni
 */
 
#ifndef _SWATDB_BLOCKHEAPFILESCANNER_H_
#define  _SWATDB_BLOCKHEAPFILESCANNER_H_
 
#include <string>
#include <vector>
#include <mutex>
#include "swatdb_types.h"
#include "file.h" //for inheritance
 
class HeapPage; 
class HeapFile;
class Record;
class HeapPageScanner;
 
class BlockHeapFileScanner{
 
  public:
 
    BlockHeapFileScanner(HeapFile* file, std::uint32_t block_size);
 
    ~BlockHeapFileScanner();
 
    RecordId getNext(Record* record);
    
    bool nextBlock();
 
    void resetBlock();
  private:
 
    bool _advancePage();
 
    BufferManager *buf_mgr;
 
    PageId cur_pid;
 
    HeapPage *cur_page;
    
    PageId beg_pid;
 
    bool beg_full;
 
    std::uint32_t block_size;
 
    std::uint32_t block_count;
 
    HeapPageScanner* scanner;
 
    HeapFile* file;
 
    bool end_of_full;
 
    bool end_of_free;
};
 
#endif