/*

* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: Socket Interaction Thread implementation.

*

*/

#ifndef __SIT_H__

#define __SIT_H__

#include <e32std.h>

#include <e32base.h>

#include "eventmediatorapi.h"

#include "sitdeathobserver.h"

#ifndef TRAP_IGNORE

#define TRAP_IGNORE(_s) {TInt _ignore;TTrap __t;if (__t.Trap(_ignore)==0){_s;TTrap::UnTrap();}}

#endif

_LIT(KSitName, "SocketInteractionThread");

static const TUid KUidSit = {0x101FD28D};

enum TSitPanic

    {

    EPanicUnknownEventType = 1,

    EPanicInvalidTaskHandlerState,

    EPanicUnexpectedEventOccured                             

    };

const TUint KSitMaxHeapSize = 0x80000;  // 512 kB

/**

 * Socket Interaction Thread implementation

 */

class CSit : public CBase, public MSitDeathListener

    {

/**

 ** @internalComponent

 */

public:

    IMPORT_C CSit(MSitDeathListener* aSitDeathListener);

    IMPORT_C ~CSit();

    IMPORT_C void StartL();

    IMPORT_C static TBool EventRequiresSit(TEventType aEventType);

    IMPORT_C TThreadId ThreadId();

    IMPORT_C static TEventType FindTaskRequestEventType(TEventType aCancelEventType);

    IMPORT_C static TEventType FindCancelEventType(TEventType aTaskRequestEventType);

    IMPORT_C static TBool IsTaskCancellationObservationRequest(TEventType aEventType);

public: // From MSitDeathListener    

    void SitDied();

public:    

    static HBufC16* To16BitL(const TDesC8& aDes);

private:

    void StartWorkingL();

    void StartThreadL();

    static TInt ThreadFunction(TAny* aParameters);

private:

    RThread* iTaskThread;

    CSitDeathObserver* iSitDeathObserver;

    MSitDeathListener* iSitDeathListener;

    TEventType iEventType;

    };

#endif // __SIT_H__