// product.cc
// Kenneth J. Goldman 12/26/94
// T. Paul McCartney 12/30/96 (converted)
//
// This module has three integer presentation entries.
//    i1 and i2: input integer values
//    out: an output value that is the product of i1 and i2
// The module is reactive.  It terminates when either input value is negative.

#include <iostream.h>
#include "PG.hh"

static int done = 0;

PGint i1 = 0;
PGint i2 = 0;
PGint out = 0;


class productReactor : public PGreactor {
public:
  virtual void react(PGvariable&) {
    if ((i1 < 0) || (i2 < 0))
      done = 1;
    else {
      cout << "multiplying " << i1 << " by " << i2 << endl;
      out = i1 * i2;
    }
  };
};


int
main()
{
  PG::initialize("PRODUCT");

  out.publish("out", PG::READ);
  i1.publish("i1", PG::WRITE);
  i2.publish("i2", PG::WRITE);

  productReactor r;
  i1.setReactor(&r);
  i2.setReactor(&r);

  while (!done)
    PG::sleep(0, 200);

  PG::terminate();
}