CWE-ou-minkata/Sources/Plasma/NucleusLib/pnKeyedObject/plKeyImp.h

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*==LICENSE==*/
#ifndef plKeyImp_inc
#define plKeyImp_inc

#include "plKey.h"
#include "hsTemplates.h"
#include "plUoid.h"  
#include "hsBitVector.h"
#include "plRefFlags.h"

//------------------------------------
// plKey is a handle to a keyedObject
//------------------------------------
class plKeyImp : public plKeyData 
{
private:
    static hsKeyedObject* SafeGetObject(const plKeyImp* key);

public:
    plKeyImp();
    plKeyImp(plUoid, uint32_t pos,uint32_t len);
    virtual ~plKeyImp();

    virtual const plUoid&   GetUoid() const { return fUoid; }
    virtual const plString& GetName() const;

    virtual hsKeyedObject*  GetObjectPtr();
    virtual hsKeyedObject*  ObjectIsLoaded() const;
    virtual hsKeyedObject*  VerifyLoaded();

    // called before writing to disk so that static keys can have faster lookups (int compare instead of string compare)
    void SetObjectID(uint32_t id) {fUoid.SetObjectID(id);}

    //----------------------
    // I/O
    // ResMgr performs read, so it can search for an existing instance....
    //----------------------
    void Read(hsStream* s);
    void Write(hsStream* s);
    void WriteObject(hsStream* s);
    // For when you need to skip over a key in a stream
    static void SkipRead(hsStream* s);

    uint32_t GetStartPos() const  { return fStartPos; } // for ResMgr to read the Objects
    uint32_t GetDataLen() const   { return fDataLen;  } // for ResMgr to read the Objects

    //----------------------
    // Allow a keyed object to behave as if it has an active ref when in fact the object
    // should only be active ref'ed by a non-keyed parent.  Essentially just bumps/decs
    // the active ref count to facilitate normal object creation/destruction
    //----------------------
    virtual hsKeyedObject*  RefObject(plRefFlags::Type flags = plRefFlags::kActiveRef);
    virtual void            UnRefObject(plRefFlags::Type flags = plRefFlags::kActiveRef);

    //----------------------
    // Release has two behaviors, depending on whether the ref is active or passive:
    // Active - Release decs the ActiveRefCnt. When it gets to zero, the object will be deleted.
    // Passive - Unregisters my interest in when the object is created or destroyed.
    //----------------------
    virtual void Release(plKey targetKey);

    void UnRegister();
    void SetUoid(const plUoid& uoid);
    void SetupNotify(plRefMsg* msg, plRefFlags::Type flags);

    // hsKeyedObject use only!
    hsKeyedObject* SetObjectPtr(hsKeyedObject* p);

    ////////////////////////////////////////////////////////////////////////////
    // ResManager/Registry use only!
    //

    //----------------------
    // Clone access
    //----------------------
    void    AddClone(plKeyImp* c);
    void    RemoveClone(plKeyImp* c) const;
    plKey   GetClone(uint32_t playerID, uint32_t cloneID) const;
    void    CopyForClone(const plKeyImp* p, uint32_t playerID, uint32_t cloneID);    // Copy the contents of p for cloning process

    uint32_t  GetNumClones();
    plKey   GetCloneByIdx(uint32_t idx);
    plKey   GetCloneOwner() { return fCloneOwner; }

    void NotifyCreated();
    void ISetupNotify(plRefMsg* msg, plRefFlags::Type flags); // Setup notifcations for reference, don't send anything.

    void        AddRef(plKeyImp* key) const;
    uint16_t      GetNumRefs() const { return fRefs.GetCount(); }
    plKeyImp*   GetRef(int i) const { return fRefs[i]; }
    void        RemoveRef(plKeyImp *key) const;

    virtual uint16_t      GetActiveRefs() const           { return fNumActiveRefs; }
    virtual uint16_t      GetNumNotifyCreated() const     { return fNotifyCreated.GetCount(); }
    virtual plRefMsg*   GetNotifyCreated(int i) const   { return fNotifyCreated[i]; }
    virtual const hsBitVector& GetActiveBits() const    { return fActiveRefs; }

protected:
    void        AddNotifyCreated(plRefMsg* msg, plRefFlags::Type flags);
    void        ClearNotifyCreated();
    uint16_t      GetNumNotifyCreated() { return fNotifyCreated.GetCount(); }
    plRefMsg*   GetNotifyCreated(int i) { return fNotifyCreated[i]; }
    void        RemoveNotifyCreated(int i);

    uint16_t      IncActiveRefs() { return ++fNumActiveRefs; }
    uint16_t      DecActiveRefs() { return fNumActiveRefs ? --fNumActiveRefs : 0; }

    bool    IsActiveRef(int i) const            { return fActiveRefs.IsBitSet(i) != 0; }
    void    SetActiveRef(int i, bool on=true) { fActiveRefs.SetBit(i, on); }
    bool    IsNotified(int i) const             { return fNotified.IsBitSet(i) != 0; }
    void    SetNotified(int i, bool on=true)  { fNotified.SetBit(i, on); }

    void SatisfyPending(plRefMsg* msg) const;
    void SatisfyPending() const;

    void INotifySelf(hsKeyedObject* ko);
    void INotifyDestroyed();
    void IClearRefs();

    void IRelease(plKeyImp* keyImp);

    hsKeyedObject* fObjectPtr;

    // These fields are the ones actually saved to disk
    plUoid fUoid;
    uint32_t fStartPos;   // where I live in the Datafile  
    uint32_t fDataLen;    // Length in the Datafile

    // Following used by hsResMgr to notify on defered load or when a passive ref is destroyed.
    uint16_t                      fNumActiveRefs; // num active refs on me
    hsBitVector                 fActiveRefs;    // Which of notify created are active refs
    hsBitVector                 fNotified;      // which of notifycreated i've already notified.
    hsTArray<plRefMsg*>         fNotifyCreated; // people to notify when I'm created or destroyed
    mutable hsTArray<plKeyImp*> fRefs;          // refs I've made (to be released when I'm unregistered).
    mutable int16_t               fPendingRefs;   // Outstanding requests I have out.
    mutable hsTArray<plKeyImp*> fClones;        // clones of me
    mutable plKey               fCloneOwner;    // pointer for clones back to the owning key
};

#endif // hsRegistry_inc