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#ifndef FIFO_H

#define FIFO_H

#include <systemc>

#include "define.h"

using namespace sc_core;

using namespace sc_dt;

class virtual_fifo : public sc_module{

public :

        sc_in<bool>             data_in;                                //Input data port.

        sc_out<bool>    data_out;                               //Output data port.

        sc_in<bool>                     write_n;                        //Output data control pin a.

        sc_in<bool>                     read_n;                         //Input data control pin.

        sc_in<sc_uint<2> >      x_to_fifo_sel;          //Fifo select signal when receive data.

        sc_in<sc_uint<2> >      fifo_to_x_sel;          //Fifo select signal when transfer data.

        sc_out<sc_uint<3> >     empty;                          //State of FIFO is full.

        sc_out<sc_uint<3> >     full;                           //State of FIFO is empty.

        sc_fifo<bool>   fifo, fifo1, fifo2;

        SC_CTOR(virtual_fifo):fifo(FIFO_DEEP), fifo1(FIFO_DEEP), fifo2(FIFO_DEEP){

                SC_THREAD(receive_fifo);

                sensitive << write_n.neg();

                SC_THREAD(transfer_fifo);

                sensitive << read_n.neg();

                SC_THREAD(full_signal);

                SC_THREAD(empty_signal);

        }

protected:

        sc_event full_alram;

        sc_event empty_alram;

        void receive_fifo();

        void transfer_fifo();

        void empty_signal();

        void full_signal();

};

#endif