// Copyright (c) 2007-2010 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:

// Trace Core

// 

#include <kern_priv.h>

#include "TraceCoreRouter.h"

#include "TraceCoreSubscriber.h"

#include "TraceCoreDebug.h"

#include "OstTraceDefinitions.h"

#ifdef OST_TRACE_COMPILER_IN_USE

#include "TraceCoreRouterTraces.h"

#endif

// Constants

/** 

 * Constructor

 */

DTraceCoreRouter::DTraceCoreRouter()

: iMessageSender( NULL )

    {

    }

/** 

 * Destructor

 */

DTraceCoreRouter::~DTraceCoreRouter()

    {

    Kern::MutexWait(*iLock);

    iRoutingItems.Reset();

    Kern::MutexSignal(*iLock);

    iLock->Close(NULL);

    }

/**

 * Initializes this router

 *

 * @param aMessageSender The message sender interface

 */

TInt DTraceCoreRouter::Init( MTraceCoreMessageSender& aMessageSender )

    {

    iMessageSender = &aMessageSender;

    _LIT(KTraceCoreRouterLock, "DTraceCoreRouter_Lock");

    TInt err = Kern::MutexCreate(iLock, KTraceCoreRouterLock, KMutexOrdGeneral0);

    return err;

    }

/**

 * Callback for incoming messages

 *

 * @param aMsg The message

 * @return KErrNotFound if the message id was not found (not subscribed), KErrNone if found

 */

TInt DTraceCoreRouter::MessageReceived( TTraceMessage &aMsg )

    {

    OstTraceExt1( TRACE_FLOW, DTRACECOREROUTER_MESSAGERECEIVED_ENTRY, "> DTraceCoreRouter::MessageReceived. MsgId:0x%hhx", aMsg.iMessageId );

    TInt ret( KErrNotFound );

    TUint32 messageId = aMsg.iMessageId;

    TUint32 msgFormat = aMsg.iMsgFormat;

    Kern::MutexWait(*iLock);

    for ( TInt i = 0; i < iRoutingItems.Count(); i++ )

        {

        if ( iRoutingItems[ i ].iMessageID == messageId && iRoutingItems[ i ].iMsgFormat == msgFormat )

            {

            iRoutingItems[ i ].iSubscriber->MessageReceived( aMsg );

            ret = KErrNone;

            }

        }

    Kern::MutexSignal(*iLock);

	OstTrace1( TRACE_FLOW, DTRACECOREROUTER_MESSAGERECEIVED_EXIT, "< DTraceCoreRouter::MessageReceived. Ret:%d", ret );

	return ret;

	}

/**

 * Subscribes to a message

 * 

 * @param aRoutingItem The subscription properties.

 */

TInt DTraceCoreRouter::Subscribe( TRoutingItem& aRoutingItem )

    {

    OstTrace1( TRACE_FLOW, DTRACECOREROUTER_SUBSCRIBE_ENTRY, "> DTraceCoreRouter::Subscribe 0x%x", ( TUint )&( aRoutingItem ) );

    TInt err = KErrNone;

    if ( iMessageSender != NULL ) 

        {

        if ( aRoutingItem.iSubscriber != NULL )

            {

            Kern::MutexWait(*iLock);

            // Add to routingItems array

            err = iRoutingItems.Append( aRoutingItem );

            Kern::MutexSignal(*iLock);

            if ( err == KErrNone )                

                {

                // Set message sender to routing item

                aRoutingItem.iSubscriber->SetMessageSender( *iMessageSender );

                OstTraceExt2( TRACE_NORMAL, DTRACECOREROUTER_SUBSCRIBE_SUBSCRIBED_TO_MESSAGE, "DTraceCoreRouter::Subscribe - Subscribed to message. Subscriber:0x%x MsgId:0x%x", (TUint)aRoutingItem.iSubscriber, (TUint)aRoutingItem.iMessageID );

                }

            }

        // Subscriber was NULL

        else

            {         

            err = KErrArgument;

            }

        }

    // Message sender not set

    else

        {

        err = KErrGeneral;

        }                                    

    OstTrace1( TRACE_FLOW, DTRACECOREROUTER_SUBSCRIBE_EXIT, "< DTraceCoreRouter::Subscribe. Err:%d", err );

    return err;

    }

/**

 * Unsubscribes from a message

 * 

 * @param aRoutingItem The subscription properties

 */

void DTraceCoreRouter::Unsubscribe( TRoutingItem& aRoutingItem )

    {

    // Make sure not to delete item while going through items somewhere else

    Kern::MutexWait(*iLock);

	for ( TInt i = 0; i < iRoutingItems.Count(); i++ )

	    {

	    if ( iRoutingItems[ i ].iMessageID == aRoutingItem.iMessageID

	            && iRoutingItems[ i ].iSubscriber == aRoutingItem.iSubscriber )

	        {

	        OstTraceExt2( TRACE_NORMAL, DTRACECOREROUTER_UNSUBSCRIBE_UNSUBSCRIBED, "DTraceCoreRouter::Unsubscribe - Unsubscribed 0x%x MsgID:0x%x", (TUint)aRoutingItem.iSubscriber, (TUint)aRoutingItem.iMessageID );

	        iRoutingItems.Remove( i );

	        i--;

	        }

	    }

	Kern::MutexSignal(*iLock); 

    }

/**

 * Unsubscribes from all messages of given subscriber

 * 

 * @param aSubscriber The subscriber to be unregistered

 */

void DTraceCoreRouter::Unsubscribe( DTraceCoreSubscriber& aSubscriber )

    {

    OstTrace1( TRACE_FLOW, DTRACECOREROUTER_UNSUBSCRIBEALL_ENTRY, "> DTraceCoreRouter::UnsubscribeAll 0x%x", ( TUint )&( aSubscriber ) );

    Kern::MutexWait(*iLock);

	for ( TInt i = 0; i < iRoutingItems.Count(); i++ )

	    {

	    if ( iRoutingItems[ i ].iSubscriber == &aSubscriber )

	        {

	        OstTraceExt2( TRACE_NORMAL, DTRACECOREROUTER_UNSUBSCRIBEALL_UNSUBSCRIBED, "DTraceCoreRouter::UnsubscribeAll - Unsubscribed 0x%x MsgID:%d", (TUint)&aSubscriber, (TInt)iRoutingItems[ i ].iMessageID );

	        iRoutingItems.Remove( i );

	        i--;

	        }

	    }

	Kern::MutexSignal(*iLock);

    }

// End of File