OP_InterestRef.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        OP_InterestRef.h (OP Library, C++)
 *
 * COMMENTS:
 */

#ifndef __OP_INTERESTREF_H_INCLUDED__
#define __OP_INTERESTREF_H_INCLUDED__

#include "OP_API.h"
#include "OP_DataTypes.h"

class OP_Node;

class OP_API OP_InterestRef
{
public:
    struct EvalChannelTag       {};
    static EvalChannelTag       EvalChannel;

                        OP_InterestRef()
                            : myNode(0)
                            , myParmIndex(-1)
                            , myParmSubIndex(-1)
                            , myInterestType(OP_INTEREST_DATA)
                        {
                        }

    explicit            OP_InterestRef(
                                OP_Node &node,
                                OP_InterestType type = OP_INTEREST_DATA)
                            : myNode(&node)
                            , myParmIndex(-1)
                            , myParmSubIndex(-1)
                            , myInterestType(type)
                        {
                        }

                        // parm_sub_index may be -1 to indicate TYPE_PARM
    explicit            OP_InterestRef(
                                OP_Node &node,
                                int parm_index,
                                int parm_sub_index)
                            : myNode(&node)
                            , myParmIndex(parm_index)
                            , myParmSubIndex(parm_sub_index)
                            , myInterestType(OP_INTEREST_DATA)
                        {
                        }

                        OP_InterestRef(EvalChannelTag, int thread);

    OP_Node *           node() const            { return myNode; }
    void                setNode(OP_Node *node)  { myNode = node; }
    int                 parmIndex() const       { return myParmIndex; }
    void                setParmIndex(int pi)    { myParmIndex = pi; }
    int                 parmSubIndex() const    { return myParmSubIndex; }
    void                setParmSubIndex(int vi) { myParmSubIndex = vi; }
    OP_InterestType     interestType() const    { return myInterestType; }
    void                setInterestType(OP_InterestType t)
                                                { myInterestType = t; }

    bool                isValid() const         { return (myNode != 0); }

                        enum Type
                        {
                            TYPE_NONE,
                            TYPE_NODE,
                            TYPE_PARM,
                            TYPE_CHANNEL
                        };

    Type                type() const
                        {
                            if (myNode)
                            {
                                if (myParmIndex >= 0)
                                {
                                    return (myParmSubIndex >= 0) ?
                                                TYPE_CHANNEL : TYPE_PARM;
                                }
                                return TYPE_NODE;
                            }
                            return TYPE_NONE;
                        }

private:
    OP_Node *           myNode;
    int                 myParmIndex;
    int                 myParmSubIndex;
    OP_InterestType     myInterestType;
};

#endif // __OP_INTERESTREF_H_INCLUDED__