--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kerneltest/e32test/demandpaging/d_pagingexample_1_pre.cpp	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,523 @@
+// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "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:
+// e32\e32test\demandpaging\d_pagingexample_1_pre.cpp
+// Demand paging migration example device driver d_pagingexample_1_pre: a DLogicalChannel-dervied
+// driver, pre-migration
+// 
+//
+
+#include "d_pagingexample.h"
+#include <kernel/kernel.h>
+#include <kernel/kern_priv.h>
+
+const TInt KDfcQThreadPriority = 25;
+const TInt KBufferSize = KMaxTransferSize;
+
+//
+// Logical channel
+//
+
+class DExampleChannel : public DLogicalChannel
+	{
+public:
+	typedef RPagingExample::TConfigData TConfigData;
+	typedef RPagingExample::TValueStruct TValueStruct;
+public:
+	DExampleChannel();
+	~DExampleChannel();
+	virtual TInt DoCreate(TInt aUnit, const TDesC8* anInfo, const TVersion& aVer);
+	virtual void HandleMsg(TMessageBase* aMsg);
+	TInt DoControl(TInt aFunction, TAny* a1, TAny* a2);
+	TInt DoRequest(TInt aFunction, TRequestStatus* aStatus, TAny* a1, TAny* a2);
+	TInt DoCancel(TUint aMask);
+private:
+	TDfcQue* DfcQ();
+	void Shutdown();
+	void SetConfig(const TConfigData&);
+	TInt StartNotify(TRequestStatus* aStatus);
+	TInt StartAsyncGetValue(TInt* aValue, TRequestStatus* aStatus);
+	TInt StartAsyncGetValue2(TInt* aValue1, TInt* aValue2, TRequestStatus* aStatus);
+	TInt StartRead(TAny* aBuffer, TInt aLength, TRequestStatus* aStatus);
+	TInt StartReadDes(TDes8* aDesOut, TRequestStatus* aStatus);
+	TInt StartWrite(TAny* aBuffer, TInt aLength, TRequestStatus* aStatus);
+	TInt StartWriteDes(const TDesC8* aDesIn, TRequestStatus* aStatus);
+	void ReceiveToReadBuffer();
+	void SendFromWriteBuffer();
+	static void AsyncGetValueCompleteDfcFunc(TAny* aPtr);
+	static void AsyncGetValue2CompleteDfcFunc(TAny* aPtr);
+	static void ReceiveCompleteDfcFunc(TAny* aPtr);
+	static void SendCompleteDfcFunc(TAny* aPtr);
+	void CompleteNotify();
+	void CompleteAsyncGetValue();
+	void CompleteAsyncGetValue2();
+	void CompleteRead();
+	void CompleteWrite();
+private:
+	TDynamicDfcQue* iDynamicDfcQ;
+	TConfigData iConfig;
+	DThread* iClient;
+	
+	// Notify
+	TRequestStatus* iNotifyStatus;
+	
+	// Async get value
+	TRequestStatus* iAsyncGetValueStatus;
+	TInt* iAsyncGetValueDest;
+	NTimer iAsyncGetValueTimer;
+	TDfc iAsyncGetValueDfc;
+	
+	// Async get value 2
+	TRequestStatus* iAsyncGetValue2Status;
+	TInt* iAsyncGetValue2Dest1;
+	TInt* iAsyncGetValue2Dest2;
+	NTimer iAsyncGetValue2Timer;
+	TDfc iAsyncGetValue2Dfc;
+	
+	// Read
+	TRequestStatus* iReadStatus;
+	NTimer iReadTimer;
+	TAny* iReadDest;
+	TInt iReadLength;
+	TDes8* iReadDes;
+	TDfc iCompleteReadDfc;
+	
+	// Write
+	TRequestStatus* iWriteStatus;
+	NTimer iWriteTimer;
+	TAny* iWriteSrc;
+	TInt iWriteLength;
+	const TDesC8* iWriteDes;
+	TDfc iCompleteWriteDfc;
+	TUint8 iBuffer[KBufferSize];
+	};
+
+DExampleChannel::DExampleChannel() :
+	iAsyncGetValueTimer(NULL, this),
+	iAsyncGetValueDfc(AsyncGetValueCompleteDfcFunc, this, 0),
+	iAsyncGetValue2Timer(NULL, this),
+	iAsyncGetValue2Dfc(AsyncGetValue2CompleteDfcFunc, this, 0),
+	iReadTimer(NULL, this),
+	iCompleteReadDfc(ReceiveCompleteDfcFunc, this, 0),
+	iWriteTimer(NULL, this),
+	iCompleteWriteDfc(SendCompleteDfcFunc, this, 0)
+	{
+	iClient = &Kern::CurrentThread();
+	iClient->Open();
+	}
+
+DExampleChannel::~DExampleChannel()
+	{
+	Kern::SafeClose((DObject*&)iClient, NULL);
+	if (iDynamicDfcQ)
+		iDynamicDfcQ->Destroy();
+	}
+
+TDfcQue* DExampleChannel::DfcQ()
+	{
+	return iDynamicDfcQ;
+	}
+
+TInt DExampleChannel::DoCreate(TInt /*aUnit*/, const TDesC8* /*aInfo*/, const TVersion& /*aVer*/)
+	{
+	// Existing drivers may use the kernel global DFC queue, but for testing purposes we actually
+	// allocate our own so we can control its realtime state.
+	TInt r = Kern::DynamicDfcQCreate(iDynamicDfcQ, KDfcQThreadPriority, KPagingExample1PreLdd);
+	if (r != KErrNone)
+		return r;
+	iDynamicDfcQ->SetRealtimeState(ERealtimeStateWarn);
+	
+	SetDfcQ(DfcQ());
+	iAsyncGetValueDfc.SetDfcQ(DfcQ());
+	iAsyncGetValue2Dfc.SetDfcQ(DfcQ());
+	iCompleteReadDfc.SetDfcQ(DfcQ());
+	iCompleteWriteDfc.SetDfcQ(DfcQ());
+	iMsgQ.Receive();
+	return KErrNone;
+	}
+
+void DExampleChannel::HandleMsg(TMessageBase* aMsg)
+	{
+	TThreadMessage& m=*(TThreadMessage*)aMsg;
+    TInt id=m.iValue;
+	
+	if (id==(TInt)ECloseMsg)
+		{
+		Shutdown();
+		m.Complete(KErrNone,EFalse);
+		return;
+		}
+
+	// we only support one client
+	if (m.Client() != iClient)
+		{
+		m.Complete(KErrAccessDenied,ETrue);
+		return;
+		}
+	
+    if (id==KMaxTInt)
+		{
+		// DoCancel
+		DoCancel(m.Int0());
+		m.Complete(KErrNone,ETrue);
+		return;
+		}
+    else if (id<0)
+		{
+		// DoRequest
+		TRequestStatus* pS=(TRequestStatus*)m.Ptr0();
+		TInt r=DoRequest(~id,pS,m.Ptr1(),m.Ptr2());
+		if (r!=KErrNone)
+			Kern::RequestComplete(m.Client(),pS,r);
+		m.Complete(KErrNone,ETrue);
+		}
+    else
+		{
+		// DoControl
+		TInt r=DoControl(id,m.Ptr0(),m.Ptr1());
+		m.Complete(r,ETrue);
+		}
+	}
+
+TInt DExampleChannel::DoControl(TInt aFunction,TAny* a1,TAny* /*a2*/)
+	{
+	TInt r = KErrNone;
+	switch (aFunction)
+		{
+		case RPagingExample::ESetRealtimeState:
+			iDynamicDfcQ->SetRealtimeState(a1 ? ERealtimeStateOn : ERealtimeStateWarn);
+			break;
+			
+		case RPagingExample::EGetConfig:
+			r = Kern::ThreadRawWrite(iClient, a1, (TAny*)&iConfig, sizeof(TConfigData), iClient);
+			break;
+
+		case RPagingExample::ESetConfig:
+			{
+			TConfigData newConfig;
+			r = Kern::ThreadRawRead(iClient, a1, &newConfig, sizeof(TConfigData));
+			if (r == KErrNone)
+				SetConfig(newConfig);
+			}
+			break;
+
+		default:
+			r = KErrNotSupported;
+		}
+	return r;
+	}
+
+TInt DExampleChannel::DoRequest(TInt aFunction, TRequestStatus* aStatus, TAny* a1, TAny* a2)
+	{
+	TInt r = KErrNotSupported;
+	switch (aFunction)
+		{
+		case RPagingExample::ERequestNotify:
+			r = StartNotify(aStatus);
+			break;
+			
+		case RPagingExample::ERequestAsyncGetValue:
+			r = StartAsyncGetValue((TInt*)a1, aStatus);
+			break;
+			
+		case RPagingExample::ERequestAsyncGetValue2:
+			r = StartAsyncGetValue2((TInt*)a1, (TInt*)a2, aStatus);
+			break;
+			
+		case RPagingExample::ERequestRead:
+			r = StartRead(a1, (TInt)a2, aStatus);
+			break;
+			
+		case RPagingExample::ERequestReadDes:
+			r = StartReadDes((TDes8*)a1, aStatus);
+			break;
+
+		case RPagingExample::ERequestWrite:
+			r = StartWrite(a1, (TInt)a2, aStatus);
+			break;
+			
+		case RPagingExample::ERequestWriteDes:
+			r = StartWriteDes((TDes8*)a1, aStatus);
+			break;
+		}
+	return r;
+	}
+
+TInt DExampleChannel::DoCancel(TUint /*aMask*/)
+	{
+	if (iAsyncGetValueStatus)
+		{
+		iAsyncGetValueTimer.Cancel();
+		iAsyncGetValueDfc.Cancel();
+		Kern::RequestComplete(iClient, iAsyncGetValueStatus, KErrCancel);
+		}
+
+	if (iAsyncGetValue2Status)
+		{
+		iAsyncGetValue2Timer.Cancel();
+		iAsyncGetValue2Dfc.Cancel();
+		Kern::RequestComplete(iClient, iAsyncGetValue2Status, KErrCancel);
+		}
+
+	if (iReadStatus)
+		{
+		iReadTimer.Cancel();
+		iCompleteReadDfc.Cancel();
+		Kern::RequestComplete(iClient, iReadStatus, KErrCancel);
+		}
+
+	if (iWriteStatus)
+		{
+		iWriteTimer.Cancel();
+		iCompleteWriteDfc.Cancel();
+		Kern::RequestComplete(iClient, iWriteStatus, KErrCancel);
+		}
+	
+	return KErrNone;
+	}
+
+void DExampleChannel::Shutdown()
+	{
+	}
+
+void DExampleChannel::SetConfig(const TConfigData& aNewConfig)
+	{
+	iConfig = aNewConfig;
+	}
+
+TInt DExampleChannel::StartNotify(TRequestStatus* aStatus)
+	{
+	iNotifyStatus = aStatus;	
+	CompleteNotify(); // example implementation completes the request immediately
+	return KErrNone;
+	}
+
+void DExampleChannel::CompleteNotify()
+	{
+	Kern::RequestComplete(iClient, iNotifyStatus, KErrNone);
+	}
+
+TInt DExampleChannel::StartAsyncGetValue(TInt* aValue, TRequestStatus* aStatus)
+	{
+	iAsyncGetValueDest = aValue;
+	iAsyncGetValueStatus = aStatus;
+
+	// queue a timer to simulate an asynchronous operation
+	iAsyncGetValueTimer.OneShot(KAsyncDelay, iAsyncGetValueDfc);
+	return KErrNone;
+	}
+
+void DExampleChannel::AsyncGetValueCompleteDfcFunc(TAny* aPtr)
+	{
+	DExampleChannel* self = (DExampleChannel*)aPtr;
+	self->CompleteAsyncGetValue();
+	}
+
+void DExampleChannel::CompleteAsyncGetValue()
+	{
+	TValueStruct value;
+	value.iValue1 = 1;
+	value.iValue2 = _L8("shrt");
+	TInt r = Kern::ThreadRawWrite(iClient, iAsyncGetValueDest, (TAny*)&value, sizeof(TValueStruct), iClient);
+	Kern::RequestComplete(iClient, iAsyncGetValueStatus, r);
+	}
+
+TInt DExampleChannel::StartAsyncGetValue2(TInt* aValue1, TInt* aValue2, TRequestStatus* aStatus)
+	{
+	iAsyncGetValue2Dest1 = aValue1;
+	iAsyncGetValue2Dest2 = aValue2;
+	iAsyncGetValue2Status = aStatus;
+
+	// queue a timer to simulate an asynchronous operation
+	iAsyncGetValue2Timer.OneShot(KAsyncDelay, iAsyncGetValue2Dfc);
+	return KErrNone;
+	}
+
+void DExampleChannel::AsyncGetValue2CompleteDfcFunc(TAny* aPtr)
+	{
+	DExampleChannel* self = (DExampleChannel*)aPtr;
+	self->CompleteAsyncGetValue2();
+	}
+
+void DExampleChannel::CompleteAsyncGetValue2()
+	{
+	TInt value1 = 1;
+	TInt value2 = 2;
+	TInt r = Kern::ThreadRawWrite(iClient, iAsyncGetValue2Dest1, (TAny*)&value1, sizeof(TInt), iClient);
+	if (r == KErrNone)
+		r = Kern::ThreadRawWrite(iClient, iAsyncGetValue2Dest2, (TAny*)&value2, sizeof(TInt), iClient);
+	Kern::RequestComplete(iClient, iAsyncGetValue2Status, r);
+	}
+
+TInt DExampleChannel::StartRead(TAny* aBuffer, TInt aLength, TRequestStatus* aStatus)
+	{
+	if (iReadStatus)
+		return KErrInUse;
+	if (aLength < 1 || aLength > KBufferSize)
+		return KErrArgument;
+	iReadStatus = aStatus;
+	iReadDest = aBuffer;
+	iReadLength = aLength;
+	ReceiveToReadBuffer();
+	return KErrNone;
+	}
+
+TInt DExampleChannel::StartReadDes(TDes8* aDesOut, TRequestStatus* aStatus)
+	{
+	if (iReadStatus)
+		return KErrInUse;
+	TInt r = Kern::ThreadGetDesMaxLength(iClient, aDesOut);
+	if (r < 0)
+		return r;
+	TInt length = r;
+	if (length < 1 || length > KBufferSize)
+		return KErrArgument;
+	iReadStatus = aStatus;
+	iReadDes = aDesOut;
+	iReadLength = length;
+	ReceiveToReadBuffer();
+	return KErrNone;
+	}
+
+TInt DExampleChannel::StartWrite(TAny* aBuffer, TInt aLength, TRequestStatus* aStatus)
+	{
+	if (iWriteStatus)
+		return KErrInUse;
+	if (aLength < 1 || aLength > KBufferSize)
+		return KErrArgument;
+	iWriteStatus = aStatus;
+	iWriteSrc = aBuffer;
+	iWriteLength = aLength;
+	SendFromWriteBuffer();
+	return KErrNone;
+	}
+
+TInt DExampleChannel::StartWriteDes(const TDesC8* aDesIn, TRequestStatus* aStatus)
+	{
+	if (iWriteStatus)
+		return KErrInUse;
+	TInt r = Kern::ThreadGetDesLength(iClient, aDesIn);
+	if (r < 0)
+		return r;
+	TInt length = r;
+	if (length < 1 || length > KBufferSize)
+		return KErrArgument;
+	iWriteStatus = aStatus;
+	iWriteLength = length;
+	iWriteDes = aDesIn;
+	SendFromWriteBuffer();
+	return KErrNone;
+	}
+
+void DExampleChannel::ReceiveToReadBuffer()
+	{
+	// just queue a timer to simulate an asynchronous receive operation
+	// actually will return the previous contents of the buffer
+	iReadTimer.OneShot(KAsyncDelay, iCompleteReadDfc);
+	}
+
+void DExampleChannel::SendFromWriteBuffer()
+	{
+	// just queue a timer to simulate an asynchronous send operation
+	iWriteTimer.OneShot(KAsyncDelay, iCompleteWriteDfc);
+	}
+
+void DExampleChannel::ReceiveCompleteDfcFunc(TAny* aPtr)
+	{
+	DExampleChannel* self = (DExampleChannel*)aPtr;
+	self->CompleteRead();
+	}
+
+void DExampleChannel::SendCompleteDfcFunc(TAny* aPtr)
+	{
+	DExampleChannel* self = (DExampleChannel*)aPtr;
+	self->CompleteWrite();
+	}
+
+void DExampleChannel::CompleteRead()
+	{
+	TInt r;
+	if (iReadDest)
+		{
+		r = Kern::ThreadRawWrite(iClient, iReadDest, iBuffer, iReadLength, iClient);
+		iReadDest = NULL;
+		}
+	else
+		{
+		TPtrC8 des(iBuffer, iReadLength);
+		r = Kern::ThreadDesWrite(iClient, iReadDes, des, 0, KChunkShiftBy0, iClient);
+		iReadDes = NULL;
+		}
+	
+	iReadLength = 0;
+	Kern::RequestComplete(iClient, iReadStatus, r);
+	}
+
+void DExampleChannel::CompleteWrite()
+	{
+	TInt r;
+	if (iWriteSrc)
+		{
+		r = Kern::ThreadRawRead(iClient, iWriteSrc, iBuffer, iWriteLength);
+		iWriteSrc = NULL;
+		}
+	else
+		{
+		TPtr8 des(iBuffer, iWriteLength);
+		r = Kern::ThreadDesRead(iClient, iWriteDes, des, 0);
+		iWriteDes = NULL;
+		}
+	
+	iWriteLength = 0;
+	Kern::RequestComplete(iClient, iWriteStatus, r);
+	}
+
+//
+// Logical device
+//
+
+class DExampleFactory : public DLogicalDevice
+	{
+public:
+	DExampleFactory();
+	virtual TInt Install();
+	virtual void GetCaps(TDes8& aDes) const;
+	virtual TInt Create(DLogicalChannelBase*& aChannel);
+	};
+
+DExampleFactory::DExampleFactory()
+	{
+	iParseMask = 0;
+	iVersion = TVersion(1, 0, 0);
+	}
+
+TInt DExampleFactory::Install()
+	{
+	return SetName(&KPagingExample1PreLdd);
+	}
+
+void DExampleFactory::GetCaps(TDes8& /*aDes*/) const
+	{
+	// not used but required as DLogicalDevice::GetCaps is pure virtual
+	}
+
+TInt DExampleFactory::Create(DLogicalChannelBase*& aChannel)
+	{
+	aChannel = new DExampleChannel;
+	return aChannel ? KErrNone : KErrNoMemory;
+	}
+
+DECLARE_STANDARD_LDD()
+	{
+	return new DExampleFactory;
+	}