cHash.h

#ifndef HASH_H_
#define HASH_H_

#include <random>
#include <unordered_map>
#include <iostream>
#include <semaphore.h>
#include "types.h"

extern int rank;

class cHash
{
  private:
    unsigned long long mPieceHashes[832]; //13 pieces * 64 board positions 
    unsigned long long mBoardHash;
    unsigned long long mHashTableSize;
    std::unordered_map<unsigned long long, hashState> mHashTable;

  public:
    cHash(int board[][8]);
    void fInitSemaphore();
    unsigned long long fGetHash();
    void fSetBoard(int board[][8]);
    void fUpdateHash(gameMove *m, unsigned long long &hash);
    hashState* fFindState(unsigned long long &hash);
    void fAddState(hashState &s);
    unsigned long long fBoardToHash(int board[][8]);
};

#endif