EXPORT_C TInt DIicBusController::DeRegisterChannel(DIicBusChannel* aChannel)
{
// To be used by Channel implementations to deregister a channel
__KTRACE_OPT(KIIC, Kern::Printf("DIicBusController::DeRegisterChannel, aChannel=0x%x\n",aChannel));
if(aChannel == NULL)
return KErrArgument;
RPointerArray<DIicBusChannel>* chanArray = TheController->ChannelArray();
#ifdef IIC_INSTRUMENTATION_MACRO
IIC_DEREGISTERCHAN_START_PIL_TRACE;
#endif
TInt r=KErrNone;
// Get access to the channel pointer array - exit if it is currently unavailable
// Gaining write access will prevent a client of a Master Channel from instigating a new QueueTransaction
// (or CancelTransaction), and it will obstruct a client of a Slave Channel in CaptureChannel.
if((r=TheController->GetChanWriteAccess())!=KErrNone)
return r;
// Check channel is registered
TInt chanIndex = chanArray->FindInOrder(aChannel,EntryOrder);
if(chanIndex<0)
{
TheController->FreeChanWriteAccess();
return KErrNotFound;
}
#ifdef _DEBUG
__KTRACE_OPT(KIIC, Kern::Printf("DIicBusController::DeRegisterChannel - On entry, iChannelArray ...\n"));
TheController->DumpChannelArray();
#endif
// Remove the channel from the array
// Note that this does not delete the channel object
chanArray->Remove(chanIndex);
#ifdef _DEBUG
__KTRACE_OPT(KIIC, Kern::Printf("DIicBusController::DeRegisterChannel - On exit, iChannelArray ...\n"));
TheController->DumpChannelArray();
#endif
TheController->FreeChanWriteAccess();
#ifdef IIC_INSTRUMENTATION_MACRO
IIC_DEREGISTERCHAN_END_PIL_TRACE;
#endif
return KErrNone;
}
