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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#include <kernel.h> // For Kern
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#include <kern_priv.h> // For DMutex
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#include <mmuxtrxif.h> // For MMuxTrxIf
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#include <mtrxmuxif.h> // For MTrxMuxIf, EMultiplexer... faults
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#include "multiplexer.h" // For DMultiplexer
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#include "mux.h" // For DMux
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#include "multiplexertrace.h" // For C_TRACE..
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// Faults
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enum TMultiplexerFaults
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{
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EMultiplexerMemAllocFailure = 0x00,
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EMultiplexerMemAllocFailure2,
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EMultiplexerNullParam,
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EMultiplexerInvalidTrxId,
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EMultiplexerMutexCreateFailed,
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EMultiplexerMutexWaitFailed,
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};
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// CONSTS
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DMux* DMultiplexer::iShMultiplexers[ EAmountOfTrxs ] = { NULL };
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DMutex* DMultiplexer::iShMultiplexersMutex = NULL;
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_LIT8( KMultiplexerMutex, "KMultiplexerMutex" );
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DMultiplexer::DMultiplexer(
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// None
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)
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{
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C_TRACE( ( _T( "DMultiplexer::DMultiplexer>" ) ) );
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// We need DMutex because lock is held while allocating memory and we do not have strict perf requirements for registerings.
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TInt err( Kern::MutexCreate( iShMultiplexersMutex, KMultiplexerMutex, KMutexOrdGeneral0 ) );
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ASSERT_RESET_ALWAYS( ( KErrNone == err ), ( EMultiplexerMutexCreateFailed | EDMultiplexerTraceId << KClassIdentifierShift ) );
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// No need to protect cause done only from one thread.
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for( TInt i( 0 ); i < EAmountOfTrxs; i++ )
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{
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iShMultiplexers[ i ] = NULL;
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}
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C_TRACE( ( _T( "DMultiplexer::DMultiplexer<" ) ) );
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}
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DMultiplexer::~DMultiplexer(
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// None
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)
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{
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C_TRACE( ( _T( "DMultiplexer::~DMultiplexer>" ) ) );
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// No protection needed, cause done only when kernel restarts and from one thread.
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for( TInt i( 0 ); i < EAmountOfTrxs; i++ )
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{
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DMux* temp = iShMultiplexers[ i ];
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delete temp;
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temp = NULL;
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iShMultiplexers[ i ] = NULL;
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}
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// No need to check, either we have it or we had reboted.
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iShMultiplexersMutex->Close( NULL );
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C_TRACE( ( _T( "DMultiplexer::~DMultiplexer<" ) ) );
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}
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/*
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* Registers a transceiver with unique transceiver identifier to multiplexer.
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* Returns an interface to transceiver to use multiplexer services.
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*/
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MTrxMuxIf* DMultiplexer::RegisterTrx(
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MMuxTrxIf* aTrx,
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const TUint8 aTrxId
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)
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{
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C_TRACE( ( _T( "DMultiplexer::RegisterTrx 0x%x id %d>" ), aTrx, aTrxId ) );
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DMux* mux = GetMuxForTrx( aTrxId );
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mux->SetTrx( aTrx );
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C_TRACE( ( _T( "DMultiplexer::RegisterTrx 0x%x id %d mux 0x%x<" ), aTrx, aTrxId, mux ) );
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return mux;
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}
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/*
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* Registers a link with unique link identifier to multiplexer to send and receive data through
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* transceiver identified with unique transceiver id.
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* Returns an interface to link to use multiplexer services.
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*/
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MLinkMuxIf* DMultiplexer::RegisterLink(
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MMuxLinkIf* aLink,
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const TUint8 aTrxId,
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const TUint8 aLinkId
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)
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{
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C_TRACE( ( _T( "DMultiplexer::RegisterLink 0x%x id %d %d>" ), aLink, aLinkId, aTrxId ) );
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ASSERT_RESET_ALWAYS( ( aLink ), ( EMultiplexerNullParam | EDMultiplexerTraceId << KClassIdentifierShift ) );
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ASSERT_RESET_ALWAYS( ( EAmountOfTrxs > aTrxId ), ( EMultiplexerInvalidTrxId | EDMultiplexerTraceId << KClassIdentifierShift ) );
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DMux* mux = GetMuxForTrx( aTrxId );
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mux->SetLink( aLink, aLinkId );
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C_TRACE( ( _T( "DMultiplexer::RegisterLink 0x%x id %d %d mux 0x%x<" ), aLink, aLinkId, aTrxId, mux ) );
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return mux;
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}
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/*
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* Creates new multiplexer for transceiver if not existing, if exists selects the existing one.
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* Returns a pointer to transceivers multiplexer.
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*/
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DMux* DMultiplexer::GetMuxForTrx(
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const TUint8 aTrxId
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)
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{
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C_TRACE( ( _T( "DMultiplexer::GetMuxForTrx id %d>" ), aTrxId ) );
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TInt err( Kern::MutexWait( *iShMultiplexersMutex ) );
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ASSERT_RESET_ALWAYS( ( KErrNone == err ), ( EMultiplexerMutexWaitFailed| EDMultiplexerTraceId << KClassIdentifierShift ) );
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DMux* mux = iShMultiplexers[ aTrxId ];
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if( !mux )
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{
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DMux* newMux = new DMux( aTrxId );
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iShMultiplexers[ aTrxId ] = newMux;
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mux = newMux;
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}
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ASSERT_RESET_ALWAYS( ( mux ), EMultiplexerMemAllocFailure );
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Kern::MutexSignal( *iShMultiplexersMutex );
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C_TRACE( ( _T( "DMultiplexer::GetMuxForTrx mux 0x%x id %d<" ), mux, aTrxId ) );
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return mux;
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}
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DECLARE_STANDARD_EXTENSION()
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{
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Kern::Printf( "Multiplexer (L2) extension>" );
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// Create a container extension
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DMultiplexer* extension = new DMultiplexer();
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ASSERT_RESET_ALWAYS( ( extension ), ( EMultiplexerMemAllocFailure2 | EDMultiplexerTraceId << KClassIdentifierShift ) );
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Kern::Printf( "Multiplexer (L2) extension<" );
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return extension ? KErrNone : KErrNoMemory;
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}
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