sc_signal_rv.h

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

  sc_signal_rv.h -- The resolved vector signal class.

  Original Author: Martin Janssen, Synopsys, Inc., 2001-05-21

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

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

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//$Log: sc_signal_rv.h,v $
//Revision 1.1.1.1  2006/12/15 20:31:35  acg
//SystemC 2.2
//
//Revision 1.3  2006/03/21 00:00:27  acg
//  Andy Goodrich: changed name of sc_get_current_process_base() to be
//  sc_get_current_process_b() since its returning an sc_process_b instance.
//
//Revision 1.2  2006/01/03 23:18:26  acg
//Changed copyright to include 2006.
//
//Revision 1.1.1.1  2005/12/19 23:16:43  acg
//First check in of SystemC 2.1 into its own archive.
//
//Revision 1.10  2005/09/15 23:01:52  acg
//Added std:: prefix to appropriate methods and types to get around
//issues with the Edison Front End.
//
//Revision 1.9  2005/06/10 22:43:55  acg
//Added CVS change log annotation.
//

#ifndef SC_SIGNAL_RV_H
#define SC_SIGNAL_RV_H

#include "sysc/communication/sc_signal.h"
#include "sysc/datatypes/bit/sc_lv.h"

namespace sc_core {

class sc_process_b;


// ----------------------------------------------------------------------------
//  CLASS sc_lv_resolve<W>
//
//  Resolution function for sc_dt::sc_lv<W>.
// ----------------------------------------------------------------------------

extern const sc_dt::sc_logic_value_t sc_logic_resolution_tbl[4][4];


template <int W>
class sc_lv_resolve
{
public:

    // resolves sc_dt::sc_lv<W> values and returns the resolved value
    static void resolve(sc_dt::sc_lv<W>&, const std::vector<sc_dt::sc_lv<W>*>&);
};


// IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

// resolves sc_dt::sc_lv<W> values and returns the resolved value

template <int W>
inline
void
sc_lv_resolve<W>::resolve( sc_dt::sc_lv<W>& result_,
               const std::vector<sc_dt::sc_lv<W>*>& values_ )
{
    int sz = values_.size();

    assert( sz != 0 );

    if( sz == 1 ) {
    result_ = *values_[0];
    return;
    }

    for( int j = result_.length() - 1; j >= 0; -- j ) {
    sc_dt::sc_logic_value_t res = (*values_[0])[j].value();
    for( int i = sz - 1; i > 0 && res != 3; -- i ) {
        res = sc_logic_resolution_tbl[res][(*values_[i])[j].value()];
    }
    result_[j] = res;
    }
}


// ----------------------------------------------------------------------------
//  CLASS : sc_signal_rv<W>
//
//  The resolved vector signal class.
// ----------------------------------------------------------------------------

template <int W>
class sc_signal_rv
: public sc_signal<sc_dt::sc_lv<W> >
{
public:

    // typedefs

    typedef sc_signal_rv<W>             this_type;
    typedef sc_signal<sc_dt::sc_lv<W> > base_type;
    typedef sc_dt::sc_lv<W>             data_type;

public:

    // constructors

    sc_signal_rv()
        : base_type( sc_gen_unique_name( "signal_rv" ) )
    {}

    explicit sc_signal_rv( const char* name_ )
        : base_type( name_ )
    {}


    // destructor
    virtual ~sc_signal_rv();


    // interface methods

    virtual void register_port( sc_port_base&, const char* )
    {}


    // write the new value
    virtual void write( const data_type& );


    // other methods

    this_type& operator = ( const data_type& a )
        { write( a ); return *this; }

    this_type& operator = ( const this_type& a )
        { write( a.read() ); return *this; }

    virtual const char* kind() const
        { return "sc_signal_rv"; }

protected:

    virtual void update();

protected:

    std::vector<sc_process_b*> m_proc_vec; // processes writing this signal
    std::vector<data_type*>       m_val_vec;  // new values written this signal

private:

    // disabled
    sc_signal_rv( const this_type& );
};


// IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII


// destructor

template <int W>
inline
sc_signal_rv<W>::~sc_signal_rv()
{
    for( int i = m_val_vec.size() - 1; i >= 0; -- i ) {
    delete m_val_vec[i];
    }
}


// write the new value

template <int W>
inline
void
sc_signal_rv<W>::write( const data_type& value_ )
{
    sc_process_b* cur_proc = sc_get_current_process_b();

    bool value_changed = false;
    bool found = false;
    
    for( int i = m_proc_vec.size() - 1; i >= 0; -- i ) {
    if( cur_proc == m_proc_vec[i] ) {
        if( value_ != *m_val_vec[i] ) {
        *m_val_vec[i] = value_;
        value_changed = true;
        }
        found = true;
        break;
    }
    }
    
    if( ! found ) {
    m_proc_vec.push_back( cur_proc );
    m_val_vec.push_back( new data_type( value_ ) );
    value_changed = true;
    }
    
    if( value_changed ) {
    this->request_update();
    }
}


template <int W>
inline
void
sc_signal_rv<W>::update()
{
    sc_lv_resolve<W>::resolve( this->m_new_val, m_val_vec );
    base_type::update();
}

} // namespace sc_core

#endif

// Taf!

---