systemswstubs/examplecommonisc/IscDataTransmissionBase/src/IscBufferAllocator.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/systemswstubs/examplecommonisc/IscDataTransmissionBase/src/IscBufferAllocator.cpp Tue Sep 07 08:19:48 2010 +0300
@@ -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