mpx/commonframework/common/inc/mpxheapmanager.inl
changeset 0 a2952bb97e68
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mpx/commonframework/common/inc/mpxheapmanager.inl	Thu Dec 17 08:55:47 2009 +0200
@@ -0,0 +1,123 @@
+/*
+* 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 "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:  Inline implementation of heap manager 
+*
+*/
+
+#include <mpxuser.h>
+
+// -----------------------------------------------------------------------------
+// Client handle
+// -----------------------------------------------------------------------------
+//
+inline TUint RMPXHeapManager::ClientHandle(TUint8* aBase,TInt aClientIndex)
+    { 
+    // We assume here that the chunk base address ends in 0x00 so we can put the client
+    // index at this location, so we must make sure that is true, and that there are
+    // no more clients than will fit, i.e. 0xff (255)
+    // 
+    MPX_ASSERT(aBase&&aClientIndex>=0&&aClientIndex<ENumClients);
+    MPX_ASSERT(((TUint)aBase&0xff)==0);
+    TUint h=(TUint)aBase|aClientIndex;
+    MPX_ASSERT((h&0xff)==aClientIndex);
+    MPX_ASSERT(reinterpret_cast<TUint8*>(h&0xffffff00)==aBase);
+    return h; 
+    }
+
+// -----------------------------------------------------------------------------
+// Client index
+// -----------------------------------------------------------------------------
+// 
+inline TInt RMPXHeapManager::ClientIndex(TUint aClientHandle)
+    { 
+    MPX_ASSERT(aClientHandle);
+    return aClientHandle&0xff; 
+    }
+
+// -----------------------------------------------------------------------------
+// Chunk Base
+// -----------------------------------------------------------------------------
+// 
+inline TUint8* RMPXHeapManager::ChunkBase(TUint aClientHandle)
+    { 
+    MPX_ASSERT(aClientHandle);
+    return reinterpret_cast<TUint8*>(aClientHandle&0xffffff00); 
+    }
+    
+// -----------------------------------------------------------------------------
+// Absolute pointer to T (thread relative)
+// -----------------------------------------------------------------------------
+//
+template<typename T>  
+inline T* RMPXHeapManager::Ptr(TUint aClientHandle,TInt aOffset)
+    { 
+    T* ptr=reinterpret_cast<T*>(ChunkBase(aClientHandle)+aOffset);
+    MPX_ASSERT(aOffset==((TUint8*)ptr-ChunkBase(aClientHandle))); 
+    return ptr; 
+    }
+
+// -----------------------------------------------------------------------------
+// Relative offset from absolute pointer
+// -----------------------------------------------------------------------------
+//
+inline TInt RMPXHeapManager::Offset(TUint aClientHandle,TAny* aPtr)
+    { 
+    TInt o=((TUint8*)aPtr-ChunkBase(aClientHandle));
+    MPX_ASSERT(aPtr==reinterpret_cast<TAny*>(ChunkBase(aClientHandle)+o));
+    return o; 
+    }
+
+// -----------------------------------------------------------------------------
+// RMPXHeapManager::HeapManager
+// -----------------------------------------------------------------------------
+//
+inline RMPXHeapManager& RMPXHeapManager::HeapManager(TUint aClientHandle)
+    { return *Ptr<RMPXHeapManager>(aClientHandle); }
+
+// -----------------------------------------------------------------------------
+// Frees an offset on the chunk
+// -----------------------------------------------------------------------------
+//
+inline TInt RMPXHeapManager::Free(TUint aClientHandle,TInt aOffset)
+    {
+    return Free(aClientHandle,Ptr<TAny>(aClientHandle,aOffset));
+    }
+
+// -----------------------------------------------------------------------------
+// Allocate an object on the chunk
+// -----------------------------------------------------------------------------
+//
+template<typename T> 
+inline T* RMPXHeapManager::Alloc(TUint aClientHandle)
+    {
+    T* obj=NULL;
+    TAny* ptr=Alloc(aClientHandle,sizeof(T));
+    if (ptr)
+        {
+        obj=new(ptr)T;
+        }
+    MPX_ASSERT_WORD_ALIGNED(obj);
+    return obj;
+    }
+
+// -----------------------------------------------------------------------------
+// Copy a buffer on the chunk
+// -----------------------------------------------------------------------------
+//
+inline TInt RMPXHeapManager::Copy(TUint aClientHandle,TInt aSrcOffset,TInt aSize)
+    {
+    return Copy(aClientHandle,RMPXHeapManager::Ptr<TAny>(aClientHandle,aSrcOffset),aSize);
+    }
+
+// End of file