xref: /gem5/src/systemc/tests/systemc/kernel/process_control/test07/test07.cpp

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

  test07.cpp -- Test handling of process objects with living descendants

  Original Author: Philipp A. Hartmann, OFFIS

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

      Name, Affiliation, Date:
  Description of Modification:

 *****************************************************************************/
// $Log: test07.cpp,v $
// Revision 1.2  2011/02/14 17:00:00  acg
//  Andy Goodrich: updated copyright and added cvs logging information inline.
//

#define SC_INCLUDE_DYNAMIC_PROCESSES
#include <systemc.h>

void
dump_hierarchy(
    std::vector< sc_object* > const & objs = sc_get_top_level_objects()
  , unsigned level = 0
)
{
  if (!level)
    std::cout << "------ " << "(" << sc_time_stamp() << ")" << " ------"
      << std::endl;

  std::vector<sc_object*>::const_iterator it = objs.begin();
  for( ; it != objs.end(); it++ )
  {
    std::cout << std::string( level + 1, ' ' )
              << (*it)->name() << " (" << (*it)->kind() << ")";

    sc_process_handle h(*it);

    std::cout << ( h.valid() // is it a process? -> print state
                 ? (! h.terminated() ? " (running)" : " (terminated)"  )
                 : "" )
              << std::endl;

    dump_hierarchy( (*it)->get_child_objects(), level+1 );
  }

  if (!level)
    std::cout << "---------------------- " << std::endl;
}

struct my_object : sc_object {
  my_object( const char* name ) : sc_object( name ) {}
  ~my_object()
  {
    std::cout << "+++ " << this->name() << " deleted" << std::endl;
  }
};

SC_MODULE(DUT)
{
  SC_CTOR(DUT)
    : leaf_(0)
  {
    SC_THREAD(parent);
  }

  enum start_options
  {
    no_children      = 0,
    start_child_proc = 1,
    create_child_obj = 2,
    both_children    = 3
  };

  void child( start_options opt ){
    start();

    my_object local( "local" );

    if( opt & create_child_obj )
      leaf_=new my_object("dyn_obj");

    wait( 100, SC_NS );

    if( opt & start_child_proc )
      sc_spawn( sc_bind( &DUT::child, this, no_children )
              , "grandchild" );

    wait( 100, SC_NS );
    end();
  }

  void parent()
  {
    // only parent alive
    wait( 50, SC_NS );
    dump_hierarchy();

    sc_spawn( sc_bind( &DUT::child, this, start_child_proc ), "child0" );
    sc_spawn( sc_bind( &DUT::child, this, both_children ), "child1" );

    // direct children up and running
    wait( 50, SC_NS );
    dump_hierarchy();

    // grandchildren started, child object created
    wait( 100, SC_NS );
    dump_hierarchy();

    // direct children ended (zombies kept)
    wait( 100, SC_NS );
    dump_hierarchy();

    // grandhildren ended (zombie with child object kept)
    wait( 100, SC_NS );
    dump_hierarchy();

    // child object removed, zombies deleted
    delete leaf_; leaf_ = 0;
    wait( 100, SC_NS );
    dump_hierarchy();

    {
      // create another pair of children
      sc_process_handle
        h0 = sc_spawn( sc_bind( &DUT::child, this, start_child_proc ), "child0" ),
        h1 = sc_spawn( sc_bind( &DUT::child, this, start_child_proc ), "child1" );

      wait( 100, SC_NS );
      dump_hierarchy();

      // and kill them, after it has spawned its grandchild
      wait( 50, SC_NS );
      h0.kill();
      h1.kill( SC_INCLUDE_DESCENDANTS );

      std::cout << "+++ kills sent ... "
                << "(" << sc_time_stamp() << ")"
                << std::endl;

      // needed to avoid segfault
      //wait(SC_ZERO_TIME);

    } // drop handles

    wait( 50, SC_NS );
    dump_hierarchy();

    end();
  }

  void start()
  {
    std::cout
      << "+++ "
      << sc_get_current_process_handle().name()
      << " starting "
      << "(" << sc_time_stamp() << ")"
      << std::endl;
  }
  void end()
  {
    std::cout
      << "+++ "
      << sc_get_current_process_handle().name()
      << " exiting "
      << "(" << sc_time_stamp() << ")"
      << std::endl;
  }

  my_object* leaf_;
};


int sc_main( int, char*[] )
{
  DUT dut("dut");
  sc_start(900, SC_NS );
  // everything cleaned up (only module still alive)
  dump_hierarchy();

  return 0;
}