// Copyright (c) 2005-2009 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:

//

#include "DllStarter.h"

#include <f32file.h>

#include "SystemStartupDllInfo.h"

#include "SysStartDebug.h"

#include "SysStartDefs.h"

#include "sysstartpanic.h"

#include "restartsys.h"

//

// Standard Symbian factory functions/destructor

//

CDllStarter* CDllStarter::NewL(const CSystemStartupDllInfo* aDllInfo )

	{

	CDllStarter* self = CDllStarter::NewLC(aDllInfo );

	CleanupStack::Pop(self);

	return self;

	}

CDllStarter* CDllStarter::NewLC(const CSystemStartupDllInfo* aDllInfo )

	{

	CDllStarter* self = new (ELeave) CDllStarter(aDllInfo );

	CleanupStack::PushL(self);

	return self;

	}

CDllStarter::~CDllStarter()

	{

	delete iDllInfo;

	}

CDllStarter::CDllStarter(const CSystemStartupDllInfo* aDllInfo ):

	iDllInfo(aDllInfo)  

	{

	}

//

// Public member functions

//

/** Implementation of MStartupCommand interface.

This function retrieves the DLL name and ordinal number from its 

CSystemStartupDllInfo data member. It attempts to load the DLL 

and call the specified function. 

@see MStartupCommand.

*/

void CDllStarter::Execute(TRequestStatus& aStatus)

	{

	aStatus = KRequestPending; 

	DEBUGPRINT1(_L("SysStart: CDllStarter::Execute"));

	// Find the name of the DLL to be loaded from the information 

	// already retrieved from the SSC file.

	TFileName dllName =iDllInfo->DllName();

	_LIT(KExtension, ".dll");

	dllName.Append(KExtension);

    // Initialise variables

    _LIT(KSysBin, "z:\\sys\\bin\\");

	RLibrary lib;

	TInt err = KErrGeneral; 

	TBool dllLoaded = EFalse; 

	TUint8 ordinal = iDllInfo->Ordinal();

	// The DLL may not be found or the DLL function may return an error 

	// code. The number of times to re-attempt is specified in the SSC file.

	TInt attemptsRequired = iDllInfo->NoOfRetries() + 1; 

 	while ((err != KErrNone)   && (attemptsRequired-- >0))

	 	{

		// Search for and load the DLL. 	 

       	if ((err = lib.Load(dllName, KSysBin)) == KErrNone)

 			{ 

 			DEBUGPRINT2(_L("SysStart: dll loaded - %S"), &dllName);

 			dllLoaded = ETrue;		 

 			}

 		else

			{

			DEBUGPRINT3(_L("SysStart: Unable to load DLL - %S, error - %d"), &dllName, err);

			}

  		// Call the function in the Dll

  		if (dllLoaded)

  			{	

  			// Identify the function to be called according to the ordinal 

 			// number specified in the SSC file.

 			TLibraryFunction ordinalfunction = lib.Lookup(ordinal);

 			if (ordinalfunction != NULL)

 				{	

 				Dllfunctiontype getDllFunction = reinterpret_cast<Dllfunctiontype>(ordinalfunction);

  		 		DEBUGPRINT2(_L("SysStart: Calling function at ordinal %d."), ordinal);

  		 		err = (*getDllFunction)(iDllInfo->DllBuffer());

 				}

 			else

 				{

 				DEBUGPRINT2(_L("Sysstart: No function at specified ordinal %d"), ordinal);

 				err = KErrNotFound;

 				// No function exists at the ordinal specified so 

 				// there is no point in re-attempting execution.

 				attemptsRequired = 0;

 				}

  			}

	 	}

	// Take action on error condition

	if (err != KErrNone) 

		{	

 		// Check required behaviour on failure specified in SSC

 		if (iDllInfo->FailOnError())

 			{ 

			err = RestartSys::RestartSystem();

			if (KErrNone != err)

				{

				DEBUGPRINT2(_L("Sysstart: Restart System Call failed with error %d"), err);

 				PanicNow(KPanicDllStarter, ERestartSystemCallFailed);

				}

			User::After(5000000); // required by RestartSys API, see comments in RestartSys::RestartSystem()

 			}			 

		}

 	lib.Close();

	TRequestStatus* requestStatus = &aStatus;

	User::RequestComplete(requestStatus, err);

	}

void CDllStarter::Release() 

	{

	delete this;

	}