/afs/cs.wisc.edu/p/course/cs564-jignesh/public/html/projects/BadgerDB/bufmgr/src/buffer.cpp

#include <memory>
#include <iostream>
#include "buffer.h"
#include "exceptions/buffer_exceeded_exception.h"
#include "exceptions/page_not_pinned_exception.h"
#include "exceptions/page_pinned_exception.h"
#include "exceptions/bad_buffer_exception.h"
#include "exceptions/hash_not_found_exception.h"

namespace badgerdb { 

BufMgr::BufMgr(std::uint32_t bufs)
  : numBufs(bufs) {
  bufDescTable = new BufDesc[bufs];

  for (FrameId i = 0; i < bufs; i++) 
  {
    bufDescTable[i].frameNo = i;
    bufDescTable[i].valid = false;
  }

  bufPool = new Page[bufs];

  int htsize = ((((int) (bufs * 1.2))*2)/2)+1;
  hashTable = new BufHashTbl (htsize);  // allocate the buffer hash table

  clockHand = bufs - 1;
}


BufMgr::~BufMgr() {
}

void BufMgr::advanceClock()
{

}

void BufMgr::allocBuf(FrameId & frame) 
{
}

  
void BufMgr::readPage(File* file, const PageId pageNo, Page*& page)
{
}


void BufMgr::unPinPage(File* file, const PageId pageNo, const bool dirty) 
{
}

void BufMgr::flushFile(const File* file) 
{
}

void BufMgr::allocPage(File* file, PageId &pageNo, Page*& page) 
{
}

void BufMgr::printSelf(void) 
{
  BufDesc* tmpbuf;
  int validFrames = 0;
  
  for (std::uint32_t i = 0; i < numBufs; i++)
  {
    tmpbuf = &(bufDescTable[i]);
    std::cout << "FrameNo:" << i << " ";
    tmpbuf->Print();

    if (tmpbuf->valid == true)
      validFrames++;
  }

  std::cout << "Total Number of Valid Frames:" << validFrames << "\n";
}

}