sl@0: // Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // Name        : loadeddlls.cpp
sl@0: // Part of     : libdl library
sl@0: // Implements and maintains the list of opened dll.
sl@0: // 
sl@0: //
sl@0: 
sl@0: // INCLUDE FILES
sl@0: #include "loadeddlls.h"
sl@0: 	
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : CLoadedDlls::CLoadedDlls()
sl@0: //Description   : Constructor
sl@0: //-----------------------------------------------------------------------------
sl@0: CLoadedDlls::CLoadedDlls()
sl@0: 	{
sl@0: 	const TInt error = CreateLock();  
sl@0: 	//if error creating lock, panic.
sl@0: 	if ( KErrNone != error )
sl@0: 		{
sl@0: 		User::Panic(_L(""), error);
sl@0: 		}
sl@0: 	}
sl@0: 	
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : CLoadedDlls::~CLoadedDlls()
sl@0: //Description   : Destructor
sl@0: //-----------------------------------------------------------------------------
sl@0: CLoadedDlls::~CLoadedDlls()
sl@0: 	{
sl@0: 	iLock.Close();
sl@0: 	iHandleList.Close();
sl@0: 	}
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TInt CLoadedDlls::Add(const TDllEntry& aDllEntry)
sl@0: //Description   : To add the dll to the list.
sl@0: //Return Value  : KErrNone if added successfully else system wide error
sl@0: //-----------------------------------------------------------------------------
sl@0: TInt CLoadedDlls::Add(const TDllEntry& aDllEntry) 
sl@0: 	{
sl@0: 	return iHandleList.Append(aDllEntry);
sl@0: 	}
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : void CLoadedDlls::Remove(const TInt aIndex)
sl@0: //Description   : To remove the dll from the list.
sl@0: //-----------------------------------------------------------------------------
sl@0: void CLoadedDlls::Remove(const TInt aIndex)
sl@0: 	{
sl@0: 	iHandleList.Remove(aIndex);
sl@0: 	iHandleList.GranularCompress();
sl@0: 	}
sl@0: 	
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TDllEntry& CLoadedDlls::At(const TInt aIndex)
sl@0: //Description   : Get DllEntry& at particular index. This function assumes that
sl@0: //				  index is valid.
sl@0: //Return Value  : TDllEntry& DllEntry corresponding to aIndex
sl@0: //-----------------------------------------------------------------------------
sl@0: TDllEntry& CLoadedDlls::At(const TInt aIndex)
sl@0: 	{
sl@0: 	return iHandleList[aIndex];
sl@0: 	}
sl@0: 	
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TInt CLoadedDlls::Find(const void* aHandle) const
sl@0: //Description   : Finds if dll with this handle exist or not
sl@0: //Return Value  : Index in list if found else KErrNotFound
sl@0: //-----------------------------------------------------------------------------
sl@0: TInt CLoadedDlls::Find(const void* aHandle) const
sl@0: 	{
sl@0: 	TDllEntry tempDllEntry((TInt) aHandle);
sl@0: 	return iHandleList.Find(tempDllEntry, TIdentityRelation<TDllEntry>(TDllEntry::CompareByHandle));
sl@0: 	}
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TInt CLoadedDlls::Find(const RLibrary& aLibrary) const
sl@0: //Description   : Finds if dll with this library i.e. same path exist or not
sl@0: //Return Value  : Index in list if found else KErrNotFound
sl@0: //-----------------------------------------------------------------------------
sl@0: TInt CLoadedDlls::Find(const RLibrary& aLibrary) const
sl@0: 	{
sl@0: 	TDllEntry tempDllEntry(aLibrary);
sl@0: 	return iHandleList.Find(tempDllEntry,TIdentityRelation<TDllEntry>(TDllEntry::CompareByPath));
sl@0: 	}
sl@0: 
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TBool TDllEntry::CompareByHandle(const TDllEntry& aEntry) 
sl@0: //Description   : Comparator function, compares iLibrary.Handle() of two
sl@0: //				  TDllEntry.
sl@0: //Return Value  : ETrue if Handle of both TDllEntry's RLibrary's matches
sl@0: //				  else EFalse.
sl@0: //-----------------------------------------------------------------------------
sl@0: TBool TDllEntry::CompareByHandle(const TDllEntry& aEntry1, const TDllEntry& aEntry2)
sl@0: 	{
sl@0: 	if (aEntry1.iLibrary.Handle() == aEntry2.iLibrary.Handle())
sl@0: 		{
sl@0: 		return ETrue;
sl@0: 		}
sl@0: 	return EFalse;
sl@0: 	}
sl@0: 	
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TBool TDllEntry::CompareByPath(const TDllEntry& aEntry)
sl@0: //Description   : Comparator function, compares path corresponding to two
sl@0: //				  TDllEntry.
sl@0: //Return Value  : ETrue if file name of both TDllEntry's RLibrary's matches
sl@0: //				  else EFalse.
sl@0: //-----------------------------------------------------------------------------
sl@0: TBool TDllEntry::CompareByPath(const TDllEntry& aEntry1, const TDllEntry& aEntry2)
sl@0: 	{
sl@0: 	if (aEntry1.iLibrary.FileName().Compare(aEntry2.iLibrary.FileName()))
sl@0: 		{
sl@0: 		return EFalse;
sl@0: 		}
sl@0: 	return ETrue;
sl@0: 	}		
sl@0: 		
sl@0: //-----------------------------------------------------------------------------
sl@0: //Function Name : TDllEntry::TDllEntry(const RLibrary aLibrary, const TInt aFlag)
sl@0: //Description   : constructor. to initialise library by RLibrary object
sl@0: //-----------------------------------------------------------------------------
sl@0: TDllEntry::TDllEntry(const RLibrary& aLibrary, const TInt aFlag) : iLibrary(aLibrary), iFlags(aFlag), iRefCount(1)
sl@0: 	{
sl@0: 	}