/*

* Copyright (c) 2008 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:  Presence Cache trace utilities

*

*/

#ifndef PRESTRACE_H__

#define PRESTRACE_H__

#include <e32std.h>

// CONSTANTS

_LIT( KPresenceTraceLogDir, "presence" );

_LIT( KPresenceTraceLogFile, "presence.log" );

 //TRACE INDIRECTION

#ifdef _DEBUG

    /**

     * Trace handlers. Different statements with 

     * different names for handling different parameter amounts.

     *

     * Statements produce traces only in debug builds.

     * In hardware debug builds traces go to file defined

     * KPresenceTraceLogDir and KPresenceTraceLogFile.

     */

    #define TRACE( aStatement ) PresenceTrace::Trace( aStatement )

    #define TRACE_1( aStatement, aP1 ) PresenceTrace::Trace( aStatement, aP1 )

    #define TRACE_2( aStatement, aP1, aP2 ) PresenceTrace::Trace( aStatement, aP1, aP2 )

    #define TRACE_3( aStatement, aP1, aP2, aP3 ) PresenceTrace::Trace( aStatement, aP1, aP2, aP3 )

    #define TRACE_4( aStatement, aP1, aP2, aP3, aP4 ) PresenceTrace::Trace( aStatement, aP1, aP2, aP3, aP4 )

    #define TRACE_5( aStatement, aP1, aP2, aP3, aP4, aP5 ) PresenceTrace::Trace( aStatement, aP1, aP2, aP3, aP4, aP5 )

    #define TRACE_6( aStatement, aP1, aP2, aP3, aP4, aP5, aP6 ) PresenceTrace::Trace( aStatement, aP1, aP2, aP3, aP4, aP5, aP6 )

    /**

     * Block (and thus also function) trace handlers. These 

     * mark block enter, exit and also non local exit to traces.

     *

     * Example:

     * void CSomeClass::SomeMethod()

     *      {

     *      TRACE_BLOCK_ENTER( "CSomeClass::SomeMethod" );

     *

     *      Do your stuff here. If there happens a leave

     *      or return before "TRACE_BLOCK_EXIT()" statement,

     *      it is marked to traces with "CSomeClass::SomeMethod - nonlocal exit"

     *

     *      TRACE_BLOCK_EXIT();

     *      }

     */

    #define TRACE_BLOCK_ENTER( aBlockName ) TPresenceBlockTraceHandler __blockTraceHandler( _S( aBlockName ) );

    #define TRACE_BLOCK_EXIT() __blockTraceHandler.NormalExit();

#else //NOT _DEBUG

    #define TRACE( aStatement )

    #define TRACE_1( aStatement, aP1 )

    #define TRACE_2( aStatement, aP1, aP2 )

    #define TRACE_3( aStatement, aP1, aP2, aP3 )

    #define TRACE_4( aStatement, aP1, aP2, aP3, aP4 )

    #define TRACE_5( aStatement, aP1, aP2, aP3, aP4, aP5 )

    #define TRACE_6( aStatement, aP1, aP2, aP3, aP4, aP5, aP6 )

    #define TRACE_BLOCK_ENTER( aBlockName )

    #define TRACE_BLOCK_EXIT()

#endif

/**

 * trace sink.

 */

class PresenceTrace

    {

public:

    /**

     * Trace sink.

     *

     * @param aFmt A format list to print to trace.

     */

    IMPORT_C static void Trace( TRefByValue<const TDesC> aFmt,... );

private: //Prohibited construtor / destructor

    PresenceTrace();

    ~PresenceTrace();

    };

/**

 * Block trace handler.

 */

NONSHARABLE_CLASS( TPresenceBlockTraceHandler )

    {

public:

    /**

     * Block trace handler constructor.

     *

     * @param aBlockName Block name.

     */

    TPresenceBlockTraceHandler( const TText* aBlockName );

    /**

     * Block trace handler destructor.

     */

    ~TPresenceBlockTraceHandler();

    /**

     * Marks that block has reached its normal exit.

     */

    void NormalExit();

private:

    //Block name

    const TPtrC   iBlockName;

    //Normal exit marker

    TBool iBlockNormalExit;

};

#endif  // PRESTRACE_H__