xref: /gem5/src/systemc/tests/systemc/communication/sc_prim_channel/test09/test09.cpp

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/*****************************************************************************

  test09.cpp --

  Original Author: Ucar Aziz, Synopsys, Inc., 2002-02-15
                   Martin Janssen, Synopsys, Inc., 2002-02-15

 *****************************************************************************/

/*****************************************************************************

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
  changes you are making here.

      Name, Affiliation, Date:
  Description of Modification:

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// test of sc_prim_channel::next_trigger(const sc_time&, sc_event_or_list&)

#include <systemc.h>

//write and read interfaces
class write_if : virtual public
sc_interface
 {
  public:
   virtual void write() = 0;
};

class read_if : virtual public
sc_interface
{
 public:
  virtual void read( ) = 0;
};

// channel implements write_if and read_if interfaces
class channel :
  public sc_channel,
  public write_if,
  public read_if
{

  public :

  //constructor
  channel(sc_module_name name):sc_channel(name)  , data(0)
  { }

  //write to channel
  void write(){
    static int i = 0;
    sc_time t1(10, SC_NS);
    next_trigger(t1);
    data = i;
    cout <<"simulation time" << ":" << sc_time_stamp()<<"    ";
    cout<<"writing "<< data <<" to channel" << endl;

    if(i < 3){
      write_event_1.notify(20, SC_NS);
    }
    else if(3 <= i & i < 6) {
      write_event_1.notify(5, SC_NS);
	}
    else{
      write_event_2.notify(6, SC_NS);
    }

    i++;
  }

  //read from channel
  void read( ){
    int j;
    sc_time t2(10, SC_NS);
    next_trigger(t2, write_event_1 | write_event_2);
    j = data;
    cout <<"simulation time" << ":" << sc_time_stamp();
    cout<<"    reading "<<j<<" from channel" << endl;
  }

  private:
  int data;
  sc_event write_event_1, write_event_2;

};

//source module
SC_MODULE(mod_a)
{
  sc_port<write_if> out;

  void write( )
  {
    out->write();
  }

  SC_CTOR( mod_a ){

    SC_METHOD(write);
  }
};

//sink module
SC_MODULE(mod_b)
{
  sc_port<read_if> input;
  int i;

  void read( )
  {
   input->read();
  }

  SC_CTOR( mod_b ){

    SC_METHOD(read);
  }
};


int sc_main(int, char*[] )
{
  channel a("a");
  mod_a modul_a("modul_a");
  mod_b modul_b("modul_b");
  modul_a.out(a);
  modul_b.input(a);

  sc_start(120, SC_NS);
  return 0 ;
}