--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/MemoryManager/Src/FastAllocator.cpp	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,134 @@
+/*
+* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "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 "FastAllocator.h"
+#include "MemoryManager.h"
+#include "MemoryPool.h"
+
+EXPORT_C RFastAllocator::RFastAllocator(CFastMemoryPool* aPool) : iHeap( User::Heap() ), iPool( aPool )
+{
+    iHeapBase = (TUint32)iHeap.Base() & 0xffff0000;
+}
+
+EXPORT_C RFastAllocator::~RFastAllocator()
+{
+}
+
+
+EXPORT_C TAny* RFastAllocator::Alloc(TInt aSize)
+{
+    return iPool->Allocate( aSize );
+}
+
+EXPORT_C void RFastAllocator::Free(TAny* aPtr)
+{
+    // make sure we go to the right memory pool
+    if( IsLocatedInHeap( aPtr ) )
+        iHeap.Free( aPtr );
+    else
+        iPool->Free( aPtr );
+}
+
+EXPORT_C TAny* RFastAllocator::ReAlloc(TAny* aPtr, TInt aSize, TInt aMode)
+{
+    TAny* p(NULL);
+    TInt originalSize(0);
+    
+    // check the right memory pool
+    if( IsLocatedInHeap( aPtr ) )
+        {
+        // allocate in memory manager's pool
+        p = iPool->Allocate( aSize );
+        TInt cpSize = iHeap.AllocLen( aPtr );
+        originalSize = cpSize;
+        cpSize = cpSize < aSize ? cpSize : aSize;
+        memcpy( p, aPtr, cpSize );
+        iHeap.Free( aPtr );
+        }
+    else
+        {
+        originalSize = iPool->MemorySize(aPtr);
+        p = iPool->ReAllocate( aPtr, aSize );
+        }
+
+    // Handle aMode.
+    // ENeverMove: Don't move memory on realloc, return NULL if it was moved.
+    // EAllowMoveOnShrink: Allow moving memory on realloc when size requested
+    //    is smaller, return NULL if moved and request size is greater (equal).
+    if ( (aMode == ENeverMove && p != aPtr) ||
+         (aMode == EAllowMoveOnShrink && originalSize >= aSize && p != aPtr) )
+        {
+        Free(p);
+        return NULL;
+        }
+
+    return p;
+}
+
+EXPORT_C TInt RFastAllocator::AllocLen(const TAny* aCell) const
+{
+    return iPool->MemorySize( (void*)(aCell) );
+}
+
+EXPORT_C TInt RFastAllocator::Compress()
+{
+    // DO NOTHING
+    return 0;
+}
+
+EXPORT_C void RFastAllocator::Reset()
+{
+    // DO NOTHING
+}
+
+EXPORT_C TInt RFastAllocator::AllocSize(TInt& aTotalAllocSize) const
+{
+    // allocated cell size
+    aTotalAllocSize = 0;
+    return 0;
+}
+
+EXPORT_C TInt RFastAllocator::Available(TInt& aBiggestBlock) const
+{
+    // make sure the caller is not scared of futher allocation
+    aBiggestBlock = KMaxTInt;
+    return KMaxTUint;
+}
+
+EXPORT_C TInt RFastAllocator::DebugFunction(TInt, TAny*, TAny*)
+{
+    return 0;
+}
+
+EXPORT_C TInt RFastAllocator::Extension_(TUint, TAny*&, TAny*)
+{
+    return 0;
+}
+
+TBool RFastAllocator::IsLocatedInHeap( TAny* aPtr ) const
+{
+    // Quick check first, the initial heap size is usually defined as
+    // 0x5000. For memory cell allocated in this heap, it's address 
+    // share the same upper 16 bits with heap base address.
+    if( ((TUint32)aPtr & 0xffff0000) != iHeapBase ) return EFalse;
+
+    // very rare case, check it anyway
+    TUint32 top = iHeapBase + iHeap.Size();
+    return ( (TUint32)aPtr >= iHeapBase && (TUint32)aPtr <= top );
+}
+
+// END OF FILE