sc_process_handle.h

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  set forth in the SystemC Open Source License Version 2.4 (the "License");
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/*****************************************************************************

  sc_process_handle.h -- Process access support.

  Original Author: Andy Goodrich, Forte Design Systems, 17 June 2003


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

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

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

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// $Log: sc_process_handle.h,v $
// Revision 1.1.1.1  2006/12/15 20:31:37  acg
// SystemC 2.2
//
// Revision 1.5  2006/04/11 23:13:21  acg
//   Andy Goodrich: Changes for reduced reset support that only includes
//   sc_cthread, but has preliminary hooks for expanding to method and thread
//   processes also.
//
// Revision 1.4  2006/01/24 20:49:05  acg
// Andy Goodrich: changes to remove the use of deprecated features within the
// simulator, and to issue warning messages when deprecated features are used.
//
// Revision 1.3  2006/01/13 18:44:30  acg
// Added $Log to record CVS changes into the source.
//

#if !defined(sc_process_handle_h_INCLUDED)
#define sc_process_handle_h_INCLUDED

#include "sysc/kernel/sc_module.h"

namespace sc_core {

class sc_process_handle;
// friend operator declarations
    bool operator == ( const sc_process_handle& left, const sc_process_handle& right );
    bool operator != ( const sc_process_handle& left, const sc_process_handle& right );


//=============================================================================
// CLASS sc_process_handle
//
// This class provides access to an sc_process_b object instance in a
// manner which allows some persistence after the deletion of the actual
// process.
//=============================================================================
class sc_simcontext;
class sc_process_handle {
    typedef sc_process_handle this_type;

    friend bool operator == ( const this_type& left, const this_type& right );
    friend bool operator != ( const this_type& left, const this_type& right );
    friend class sc_object;
    friend class sc_join;
    friend class sc_module;
    friend class sc_reset;
    friend class sc_sensitive;
    friend class sc_sensitive_pos;
    friend class sc_sensitive_neg;
    friend class sc_thread_process;

  public:
    inline sc_process_handle();
    inline explicit sc_process_handle( sc_object* object_p );
    inline sc_process_handle( const sc_process_handle& orig );
    inline ~sc_process_handle();
    inline sc_process_handle& operator = ( const sc_process_handle& src );

  public:
    inline bool dynamic() const;
    inline const std::vector<sc_object*>& get_child_objects() const;
    inline sc_object* get_parent_object() const;
    inline sc_object* get_process_object() const;
    inline const char* name() const;
    inline sc_curr_proc_kind proc_kind() const;
    inline sc_event& terminated_event();
    inline bool terminated() const;
    inline bool valid() const;

  protected:
    inline bool dont_initialize() const
        { return m_target_p ? m_target_p->dont_initialize() : false; }
    inline void dont_initialize( bool dont );

  public:
    operator sc_process_b* ()
        { return m_target_p; }
    operator sc_cthread_handle ();
    operator sc_method_handle ();
    operator sc_thread_handle ();

  protected:
    sc_process_b* m_target_p;   // Target for this object instance.

  protected:
    static std::vector<sc_object*> empty_vector; // Returned if m_target_p == 0.
    static sc_event                non_event;    // Returned if m_target_p == 0.
};

inline bool operator == (
    const sc_process_handle& left, const sc_process_handle& right )
{
    return (left.m_target_p != 0) && (right.m_target_p != 0) &&
        (left.m_target_p == right.m_target_p);
}

inline bool operator != (
    const sc_process_handle& left, const sc_process_handle& right )
{
    return (left.m_target_p == 0) || (right.m_target_p == 0) ||
        (left.m_target_p != right.m_target_p);
}

//------------------------------------------------------------------------------
//"sc_process_handle::sc_process_handle - non-pointer constructor"
//
// This version of the object instance constructor for this class creates
// an object instance whose target needs to be supplied via an assignment.
//------------------------------------------------------------------------------
inline sc_process_handle::sc_process_handle()
{
    m_target_p = (sc_process_b*)0;
}


//------------------------------------------------------------------------------
//"sc_process_handle::sc_process_handle - pointer constructor"
//
// This version of the object instance constructor for this class creates
// an object instance whose target is the supplied sc_object instance.
// The supplied sc_object must in fact be an sc_process_b instance.
//     object_p -> sc_object instance this is handle for.
//------------------------------------------------------------------------------
inline sc_process_handle::sc_process_handle( sc_object* object_p )
{
    m_target_p = object_p ? DCAST<sc_process_b*>(object_p) : (sc_process_b*)0;
    if ( m_target_p ) m_target_p->reference_increment();
}


//------------------------------------------------------------------------------
//"sc_process_handle::sc_process_handle - copy constructor"
//
// This version of the object instance constructor for this class provides
// the copy constructor for the class. It clones the supplied original
// handle and increments the references to its target.
//     orig = sc_process_handle object instance to be copied from.
//------------------------------------------------------------------------------
inline sc_process_handle::sc_process_handle( const sc_process_handle& orig )
{
    m_target_p = orig.m_target_p;
    if ( m_target_p ) m_target_p->reference_increment();
}

//------------------------------------------------------------------------------
//"sc_process_handle::operator = - copy constructor"
//
// This version of the object instance constructor for this class provides
// the copy constructor for the class. It clones the supplied original
// handle and increments the references to its target.
//     orig = sc_process_handle object instance to be copied from.
//------------------------------------------------------------------------------
inline sc_process_handle&
sc_process_handle::operator = ( const sc_process_handle& orig )
{
    if ( m_target_p ) m_target_p->reference_decrement();
    m_target_p = orig.m_target_p;
    if ( m_target_p ) m_target_p->reference_increment();
    return *this;
}


//------------------------------------------------------------------------------
//"sc_process_handle::~sc_process_handle"
//
// This is the object instance destructor for this class. It decrements
// the reference count for its target.
//------------------------------------------------------------------------------
inline sc_process_handle::~sc_process_handle()
{
    if ( m_target_p ) m_target_p->reference_decrement();
}

//------------------------------------------------------------------------------
//"sc_process_handle::inline methods"
//
// These are short inline methods.
//------------------------------------------------------------------------------
inline void sc_process_handle::dont_initialize( bool dont )
{
    if ( m_target_p ) m_target_p->dont_initialize( dont );
}

inline bool sc_process_handle::dynamic() const
{
    return m_target_p ? m_target_p->dynamic() : false;
}

inline
const std::vector<sc_object*>& sc_process_handle::get_child_objects() const
{
    return m_target_p ? m_target_p->get_child_objects() :
        sc_process_handle::empty_vector;
}

inline sc_object* sc_process_handle::get_parent_object() const
{
    return m_target_p ? m_target_p->get_parent_object() : (sc_object*)0;
}

inline sc_object* sc_process_handle::get_process_object() const
{
    return m_target_p;
}

inline const char* sc_process_handle::name() const
{
    return m_target_p ? m_target_p->name() : "";
}

inline sc_curr_proc_kind sc_process_handle::proc_kind() const
{
    return m_target_p ? m_target_p->proc_kind() : SC_NO_PROC_;
}

inline bool sc_process_handle::terminated() const
{
    return m_target_p ? m_target_p->terminated() : false;
}

inline sc_event& sc_process_handle::terminated_event()
{
    return m_target_p ? m_target_p->terminated_event() :
        sc_process_handle::non_event;
}

inline bool sc_process_handle::valid() const
{
    return m_target_p ? true : false;
}


//------------------------------------------------------------------------------
//"sc_process_b::last_created_process_handle"
//
// This method returns the kind of this process.
//------------------------------------------------------------------------------
inline sc_process_handle sc_process_b::last_created_process_handle()
{
    return sc_process_handle(m_last_created_process_p);
}

inline sc_process_handle sc_get_last_created_process_handle()
{
    return sc_process_b::last_created_process_handle();
}

} // namespace sc_core


#endif // !defined(sc_spawn_h_INCLUDED)

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