sc_attribute.h

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

  sc_attribute.h -- self binding attribute
  
  Original Author: Dirk Vermeersch, Coware, Inc.
                   Vijay Kumar, Coware, Inc.

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

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

  MODIFICATION LOG - modifiers, enter your name, affiliation, date and
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      Name, Affiliation, Date:
  Description of Modification:

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#ifndef SC_ATTRIBUTE_H
#define SC_ATTRIBUTE_H

#include "sc_ms/sc_self_binding_attribute_b.h"
  
/////////////////////////////////////////////////////////////////////
template<class T, int N>
class sc_self_binding_attribute : public sc_self_binding_attribute_b
{
public:
  // get the last registered self binding port
  virtual sc_self_binding_port_b* get_registered_self_binding_port( ) {
    return current_port_protocol;
  }
  int		get_index( ) { return index; }
  void*		make_attribute( ) { return new T( ); }

  // constructor
  sc_self_binding_attribute( ) {  
    data = 0;  // initialize
    if ( N<0 ) {
      index = get_registered_self_binding_port( )->get_attribute_index( );
    } else  {
      index = N;
    }
    assert( index != -1 );
  }

  void bind( void* d ) {
    data = d;
  }

protected:
  void do_write( const T& d ) {
    *static_cast< T* >( data ) = d;
  }

  const T& do_read( ) {
    return *( static_cast< T* >( data ) );
  }

private:
  int		index;
  void*		data;
};

/////////////////////////////////////////////////////////////////////
template<class T, int N=-1>
class sc_attribute_in : public sc_self_binding_attribute< T, N >
{
public:
  sc_attribute_in( ) {
    get_registered_self_binding_port( )->add_attribute_b( this, get_index( ) );
  }

  const T& read( ) { return do_read( ); }
  operator const T& ( ) {  return read( ); }
};

//------------------------------------------------------------------
template<class T, int N=-1>
class sc_attribute_out : public sc_self_binding_attribute< T, N >
{
public:
  sc_attribute_out( ) {
    get_registered_self_binding_port( )->add_attribute_b( this, get_index( ) );
  }

  sc_attribute_out<T,N>& write( const T& data ) { 
    do_write( data ); 
    return *this;
  }
  sc_attribute_out<T,N>& operator = ( const T& data ) {
    return write( data );
  }
};

//------------------------------------------------------------------
template<class T, int N=-1>
class sc_attribute_inout : public sc_self_binding_attribute< T, N >
{
public:
  sc_attribute_inout( ) {
    get_registered_self_binding_port( )->add_attribute_b( this, get_index( ) );
  }

  const T& read( ) { return do_read( ); }
  operator const T& ( ) {  return read( ); }

  sc_attribute_inout<T,N>& write( const T& data ) { 
    do_write( data ); 
    return *this;
  }
  sc_attribute_inout<T,N>& operator = ( const T& data ) {
    return write( data );
  }
};

#endif // SC_ATTRIBUTE_H