CWE-ou-minkata/Sources/Plasma/NucleusLib/pnDispatch/plDispatch.h

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

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it under the terms of the GNU General Public License as published by
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Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/

#ifndef plDispatch_inc
#define plDispatch_inc
#include <list>
#include "hsTemplates.h"
#include "plgDispatch.h"
#include "hsThread.h"
#include "pnKeyedObject/hsKeyedObject.h"

#pragma warning(disable: 4284)

class hsResMgr;
class plMessage;
class plKey;

class plTypeFilter
{
public:
    plTypeFilter() : fHClass(0) {}

    uint16_t              fHClass;
    hsTArray<plKey>     fReceivers;
};

class plMsgWrap;

typedef void (*MsgRecieveCallback)();

class plDispatch : public plDispatchBase
{
protected:

    hsKeyedObject*                  fOwner;

    plMsgWrap*                      fFutureMsgQueue;
    static int32_t                    fNumBufferReq;
    static plMsgWrap*               fMsgCurrent;
    static hsMutex                  fMsgCurrentMutex; // mutex for above
    static hsMutex                  fMsgDispatchLock;   // mutex for IMsgDispatch
    static plMsgWrap*               fMsgHead;
    static plMsgWrap*               fMsgTail;
    static bool                     fMsgActive;
    static hsTArray<plMessage*>     fMsgWatch;
    static MsgRecieveCallback       fMsgRecieveCallback;

    hsTArray<plTypeFilter*>         fRegisteredExactTypes;
    std::list<plMessage*>           fQueuedMsgList;
    hsMutex                         fQueuedMsgListMutex; // mutex for above
    bool                            fQueuedMsgOn;       // Turns on or off Queued Messages, Plugins need them off

    hsKeyedObject*                  IGetOwner() { return fOwner; }
    plKey                           IGetOwnerKey() { return IGetOwner() ? IGetOwner()->GetKey() : nil; }
    int                             IFindType(uint16_t hClass);
    int                             IFindSender(const plKey& sender);
    bool                            IUnRegisterForExactType(int idx, const plKey& receiver);

    static plMsgWrap*               IInsertToQueue(plMsgWrap** back, plMsgWrap* isert);
    static plMsgWrap*               IDequeue(plMsgWrap** head, plMsgWrap** tail);

    bool                            IMsgNetPropagate(plMessage* msg);

    static void                     IMsgDispatch();
    static void                     IMsgEnqueue(plMsgWrap* msgWrap, bool async);

    bool                            ISortToDeferred(plMessage* msg);
    void                            ICheckDeferred(double stamp);
    bool                            IListeningForExactType(uint16_t hClass);

    void                            ITrashUndelivered(); // Just pitches them, doesn't try to deliver.

public:
    plDispatch();
    virtual ~plDispatch();

    CLASSNAME_REGISTER( plDispatch );
    GETINTERFACE_ANY( plDispatch, plCreatable );

    virtual void RegisterForType(uint16_t hClass, const plKey& receiver);
    virtual void RegisterForExactType(uint16_t hClass, const plKey& receiver);

    virtual void UnRegisterForType(uint16_t hClass, const plKey& receiver);
    virtual void UnRegisterForExactType(uint16_t hClass, const plKey& receiver);

    virtual void UnRegisterAll(const plKey& receiver);

    virtual bool    MsgSend(plMessage* msg, bool async=false);
    virtual void    MsgQueue(plMessage* msg);   // Used by other thread to Send Messages, they are handled as soon as Practicable
    virtual void    MsgQueueProcess();
    virtual void    MsgQueueOnOff(bool );     // Turn on or off Queued Messages, if off, uses MsgSend Immediately

    virtual bool    SetMsgBuffering(bool on); // On starts deferring msg delivery until buffering is set to off again.

    virtual void    BeginShutdown();

    static void SetMsgRecieveCallback(MsgRecieveCallback callback) { fMsgRecieveCallback = callback; }
};

class plNullDispatch : public plDispatch
{
public:

    virtual void RegisterForExactType(uint16_t hClass, const plKey& receiver) {}
    virtual void RegisterForType(uint16_t hClass, const plKey& receiver) {}

    virtual void UnRegisterForExactType(uint16_t hClass, const plKey& receiver) {}
    virtual void UnRegisterForType(uint16_t hClass, const plKey& receiver) {}


    virtual bool MsgSend(plMessage* msg) { return true; }
    virtual void MsgQueue(plMessage* msg) {}
    virtual void MsgQueueProcess() {}

    virtual void BeginShutdown() {}

};

#endif // plDispatch_inc