--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/systemswstubs/examplecommonisc/IscDataTransmissionBase/src/IscBufferAllocator.cpp	Thu Jan 14 07:14:53 2010 +0200
@@ -0,0 +1,229 @@
+/*
+* Copyright (c) 2007 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:  Implementation of DIscBufferAllocator class
+*
+*/
+
+
+
+// INCLUDE FILES
+#include <kernel.h>
+#include <platform.h>
+#include <kern_priv.h>
+
+#include "IscBufferAllocator.h"
+#include "IscBufferQueue.h"
+#include "IscTrace.h"
+
+// EXTERNAL DATA STRUCTURES
+
+// EXTERNAL FUNCTION PROTOTYPES  
+
+// CONSTANTS
+
+// MACROS
+
+// LOCAL CONSTANTS AND MACROS
+
+// MODULE DATA STRUCTURES
+
+// LOCAL FUNCTION PROTOTYPES
+
+// FORWARD DECLARATIONS
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// DIscBufferAllocator::DIscBufferAllocator
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+DIscBufferAllocator::DIscBufferAllocator( TIscBufferEntry* aBufferConfig )
+    : iBuffers( NULL )
+#ifndef __WINS__
+    , iBufferChunk( NULL )
+    , iCurrentAddress( NULL )
+#endif
+    {
+    for ( TUint16 i = 0; i < KIscBufferAmount; i++ )
+        {
+        iBufferConfig[i].size  = aBufferConfig[i].size;
+        iBufferConfig[i].count = aBufferConfig[i].count;
+        }
+    
+    C_TRACE( ( _T( "DIscBufferAllocator::DIscBufferAllocator" ) ) );
+    }
+
+// Destructor
+DIscBufferAllocator::~DIscBufferAllocator()
+    {
+    // delete iBuffers & chunk
+    for ( TUint8 i = 0; i < KIscBufferAmount; i++ )
+        {
+        delete iBuffers[i];
+        iBuffers[i] = NULL;
+        }
+    delete [] iBuffers;
+    iBuffers=NULL;
+
+#ifndef __WINS__
+    delete iBufferChunk;
+    iBufferChunk = NULL;
+    // free ram pages..
+#endif
+    }
+
+// -----------------------------------------------------------------------------
+// DIscBufferAllocator::AllocBuffers
+// Allocate buffers according the multiplexer
+// ( other items were commented in a header ).
+// -----------------------------------------------------------------------------
+//
+TInt DIscBufferAllocator::AllocBuffers()
+    {
+    C_TRACE( ( _T( "DIscBufferAllocator::AllocBuffers()" ) ) );
+    TUint8 i = 0;
+#ifndef __WINS__
+    TInt memoryNeeded = 0;
+    for ( i = 0; i < KIscBufferAmount; i++ )
+        {
+        if ( iBufferConfig[i].size > 0 && iBufferConfig[i].count> 0 )
+            {
+            memoryNeeded += ( iBufferConfig[i].size * iBufferConfig[i].count );
+            }        
+        }    
+    C_TRACE( ( _T( "DIscBufferAllocator::AllocBuffers memory needed %d" ), memoryNeeded ) );
+
+    // Check if buffers are allocated from ISC
+    if ( memoryNeeded > 0 )
+        {
+        AllocPhMemory( memoryNeeded );
+        }
+    else
+        {
+        return KErrNone;
+        }
+
+    TUint8* address = ( TUint8* )iCurrentAddress;
+#else
+    TUint8* address = NULL;
+#endif //WINS
+
+   
+        
+    iBuffers = new DIscBufferQueue*[ KIscBufferAmount ];
+    ASSERT_RESET_ALWAYS( iBuffers, "ISCDataTransmissionBase",EIscMemoryAllocationFailure );
+    
+    for ( i = 0; i < KIscBufferAmount; i++ )
+        {
+        if ( iBufferConfig[i].size > 0 && iBufferConfig[i].count > 0 )
+            {
+            iBuffers[i] = DIscBufferQueue::New( iBufferConfig[i].size, iBufferConfig[i].count, address );
+            }
+        }
+
+    return KErrNone;
+
+    }
+
+#ifndef __WINS__
+// -----------------------------------------------------------------------------
+// DIscBufferAllocator::AllocPhMemory
+// Physical buffer allocations
+// ( other items were commented in a header ).
+// -----------------------------------------------------------------------------
+//
+void DIscBufferAllocator::AllocPhMemory( TInt aMemoryNeeded )
+    {
+    C_TRACE( ( _T( "DIscBufferAllocator::AllocPhMemory(0x%x)" ), aMemoryNeeded ) );
+
+    TPhysAddr physAddr = 0;
+    NKern::ThreadEnterCS();
+    TInt r = Epoc::AllocPhysicalRam( aMemoryNeeded, physAddr );
+    ASSERT_RESET_ALWAYS( r == KErrNone, "IscDataTransmissionBase",EIscMemoryAllocationFailure );
+    r = DPlatChunkHw::New( iBufferChunk, physAddr, aMemoryNeeded, EMapAttrSupRw );
+    NKern::ThreadLeaveCS();
+    ASSERT_RESET_ALWAYS( r == KErrNone, "IscDataTransmissionBase",EIscMemoryAllocationFailure );
+    iCurrentAddress = iBufferChunk->LinearAddress();
+
+    }
+#endif //WINS
+
+// -----------------------------------------------------------------------------
+// DIscBufferAllocator::ReserveMemoryBlock
+// Reserves pre-allocated memory block
+// ( other items were commented in a header ).
+// -----------------------------------------------------------------------------
+//
+void DIscBufferAllocator::ReserveMemoryBlock( 
+    TDes8*& aPtr, 
+    TUint16 aSize )
+    {
+    E_TRACE( ( _T( "IBA:Res (0x%x)" ), aSize ) );
+    
+    if ( iBuffers )
+        {
+        for ( TUint8 i = 0; i < KIscBufferAmount;i++ )
+            {
+            if ( aSize <= iBufferConfig[i].size && iBufferConfig[i].count > 0 )
+                {
+                if ( iBuffers[i] )
+                    {
+                    if ( !iBuffers[i]->Empty() )
+                        {
+                        aPtr = ( TPtr8* )iBuffers[i]->Reserve();
+                        if ( aPtr )
+                            {
+                            aPtr->SetLength( 0 );
+                            E_TRACE( ( _T( "IBA:Res 0x%x %d" ), aPtr, i ) );
+                            return;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    // If Memory block is not reserved, set NULL to aPtr    
+    aPtr = NULL;
+    return;    
+    }
+
+// -----------------------------------------------------------------------------
+// DIscBufferAllocator::ReleaseMemoryBlock
+// Releases memory block allocated with ReserveMemoryBlock
+// ( other items were commented in a header ).
+// -----------------------------------------------------------------------------
+//
+void DIscBufferAllocator::ReleaseMemoryBlock( 
+    TDes8* aPtr )
+    {
+    E_TRACE( ( _T( "IBA:Rel 0x%x" ), aPtr ) );
+    if ( !aPtr )
+        {
+        TRACE_ASSERT_ALWAYS;
+        }
+    else if ( KIscBufferAmount != 0 && iBuffers )
+        {
+        for ( TUint8 i = 0; i < KIscBufferAmount; i++ )
+            {
+            if ( iBufferConfig[i].size == ( ( TDes8* )aPtr )->MaxLength() )
+                {
+                iBuffers[i]->Release( aPtr );
+                }
+            }
+        }   
+    }
+
+//  End of File