#define SC_INCLUDE_DYNAMIC_PROCESSES
#include <systemc.h>

namespace sc_utils 
{
  struct yieldable
  {
    void yield()
    {
      if( !proc_.valid() ) // lazy pingback instantiation
      {
        sc_spawn_options opt;
          opt.spawn_method();
          opt.set_sensitivity(&ping_);
        proc_ = sc_spawn( sc_bind( &yieldable::yield_method, this )
                        , "yield_method", &opt );
      }
      ping_.notify(); wait(pong_);
    }

  private:
    void yield_method() { pong_.notify(); }

    sc_event          ping_;
    sc_event          pong_;
    sc_process_handle proc_;
  };

} // namespace sc_utils

struct test_yield
  : sc_module
  , sc_utils::yieldable
{
  SC_CTOR(test_yield)
  {
    SC_THREAD(run);
  }
  void run()
  {
    std::cout << "delta: " << sc_delta_count() << std::endl;
    yield();
    std::cout << "delta: " << sc_delta_count() << std::endl;
  }
};

int sc_main(int, char*[] )
{
  test_yield top("test_yield");
  sc_start();
  return 0;
}