// Copyright (c) 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:

// e32test\mmu\t_alias_remove.cpp

// Overview:

// Test interactions when free memory being aliases.

// Details:

// Create 3 mappings to one chunk one that owns the chunk, one to map it again another process 

// and another alias mapping.

// Then while the alias mapping is accessing the chunk close the second mapping.

// Platforms/Drives/Compatibility:

// All.

// Assumptions/Requirement/Pre-requisites:

// Failures and causes:

// Base Port information:

// 

//

#define __E32TEST_EXTENSION__

#include <e32test.h>

#include <e32hal.h>

#include <e32svr.h>

const TPtrC KAliasProcessName = _L("T_ALIAS_REMOVE");

const TPtrC KAliasChunkName = _L("AliasChunk");

const TPtrC KAliasServerName = _L("AliasServer");

const TPtrC KMasterServerName = _L("MasterServer");

RBuf ChunkName;

RBuf MasterServerName;

RBuf AliasServerName;

RTest test(KAliasProcessName);

//#define ENABLE_PRINTFS

#ifndef __MSVC6__	// VC6 can't cope with variable arguments in macros.

#define T_PRINTF(x...) test.Printf(x)

#define D_PRINTF(x...) RDebug::Printf(x)

#ifdef ENABLE_PRINTFS

#define PRINTF(x) x

#else

#define PRINTF(x)

#endif // ENABLE_PRINTFS

#else

#define PRINTF(x)

#endif	// __MSCV6__

enum TSlaveMsgType

	{

	ESlaveConnect = -1,

	ESlaveDisconnect = -2,

	ESlaveReadChunk = 0,

	ESlaveClosedChunk = 1,

	};

struct SThreadData 

	{

	TUint8 iFillValue;

	TUint iChunkSize;

	RThread* iMasterThread;

	TUint iProcessId;

	};

class RAliasSession : public RSessionBase

	{

public:

	TInt CreateSession(const TDesC& aServerName, TInt aMsgSlots) 

		{ 

		return RSessionBase::CreateSession(aServerName,User::Version(),aMsgSlots);

		}

	TInt PublicSendReceive(TInt aFunction, const TIpcArgs &aPtr)

		{

		return (SendReceive(aFunction, aPtr));

		}

	TInt PublicSend(TInt aFunction, const TIpcArgs &aPtr)

		{

		return (Send(aFunction, aPtr));

		}

	};

TInt SlaveProcess(TUint aProcessId, TUint aFillValue)

	{		

	// Connect to the master server to indicate that we're ready to receive ipc messages.

	RAliasSession masterSession;

	test_KErrNone(masterSession.CreateSession(MasterServerName, 1));

	PRINTF(T_PRINTF(_L("Process ID %d Slave open chunk\n"), aProcessId));

	// Open the global chunk.

	RChunk chunk;

	TInt r = chunk.OpenGlobal(ChunkName, ETrue);

	test_KErrNone(r);

	// Connect to alias server.

	PRINTF(T_PRINTF(_L("Process ID %d Slave connect to alias server\n"), aProcessId));

	RAliasSession aliasSession;

	test_KErrNone(aliasSession.CreateSession(AliasServerName, 1));

	PRINTF(T_PRINTF(_L("Process ID %d Slave send data to alias server\n"), aProcessId));

	TPtr8 arg0(chunk.Base(), chunk.Size(), chunk.Size());

	r = aliasSession.PublicSend(ESlaveReadChunk, TIpcArgs(&arg0));

	test_KErrNone(r);

	// Close the chunk removing its mapping before the server has read it.

	chunk.Close();

	PRINTF(T_PRINTF(_L("Process ID %d Slave closed chunk\n"), aProcessId));

	r = masterSession.PublicSendReceive(ESlaveClosedChunk, TIpcArgs());

	test_KErrNone(r);

	aliasSession.Close();

	masterSession.Close();

	return KErrNone;

	}

TInt ChunkReadThread(TAny* aThreadData)

	{

	SThreadData* threadData =  (SThreadData*)aThreadData;

	RServer2 aliasServer;

	TInt r = aliasServer.CreateGlobal(AliasServerName);

	if (r != KErrNone)

		{

		RDebug::Printf("Process ID %d Error creating alias server r=%d", threadData->iProcessId, r);

		return r;

		}

	// Connect to the master server to indicate that we're ready to receive ipc messages.

	RAliasSession masterSession;

	test_KErrNone(masterSession.CreateSession(MasterServerName, 1));

	PRINTF(D_PRINTF("Process ID %d Alias wait for slave connection", threadData->iProcessId));

	RMessage2 aliasMessage;

	// Read and complete the connect message from the slave.

	aliasServer.Receive(aliasMessage);

	test_Equal(ESlaveConnect, aliasMessage.Function());

	aliasMessage.Complete(KErrNone);

	// Read the data of the remote chunk.

	PRINTF(D_PRINTF("Process ID %d Alias read chunk data", threadData->iProcessId));

	HBufC8* argTmp = HBufC8::New(threadData->iChunkSize);

	test_NotNull(argTmp);

	RBuf8 argBuf(argTmp);

	aliasServer.Receive(aliasMessage);

	test_Equal(ESlaveReadChunk, aliasMessage.Function());

	r = aliasMessage.Read(0, argBuf);

	if (r == KErrNone)

		{// Successfully read the chunk so verify it.

		aliasMessage.Complete(KErrNone);

		PRINTF(D_PRINTF("Process ID %d Alias verify chunk data", threadData->iProcessId));

		const TUint8* bufPtr = argBuf.Ptr();

		const TUint8* bufEnd = bufPtr + threadData->iChunkSize;

		for (; bufPtr < bufEnd; bufPtr++)

			{

			if (*bufPtr != threadData->iFillValue)

				{

				RDebug::Printf("Process ID %d Read incorrect data exp 0x%x got 0x%x", 

								threadData->iProcessId, threadData->iFillValue, *bufPtr);

				r = *bufPtr;

				break;

				}

			}

		}

	else

		{

		PRINTF(D_PRINTF("Process ID %d Error reading chunk remotely %d", threadData->iProcessId, r));

		}

	argBuf.Close();

	masterSession.Close();

	return r;

	}

TInt MasterProcess(TInt aProcessId)

	{

	TInt pageSize;

	UserHal::PageSizeInBytes(pageSize);

	// Need a large chunk so that alias that reads it is held for a long

	// enough period for there to be conflicts with the chunk closure in 

	// the slave process.

	const TUint KChunkSize = pageSize * 1024;

	PRINTF(T_PRINTF(_L("Process ID %d Create chunk\n"), aProcessId));

	RChunk chunk;

	TInt r = chunk.CreateGlobal(ChunkName, KChunkSize, KChunkSize);

	test_KErrNone(r);

	for (TUint8 fillValue = 1; fillValue < 255; fillValue++)

		{

		// Output a character every 16 iterations so test machines 

		// don't time out.

		if ((fillValue & 0xf) == 1)

			test.Printf(_L("."));

		PRINTF(T_PRINTF(_L("Process ID %d start slave fill value %d\n"), aProcessId, fillValue));

		RServer2 masterServer;

		r = masterServer.CreateGlobal(MasterServerName);

		test_KErrNone(r);

		RMessage2 masterMessage;

		// Update the chunk to new fill value.

		memset(chunk.Base(), fillValue, KChunkSize);

		PRINTF(T_PRINTF(_L("Process ID %d Start the slave process\n"), aProcessId));

		RProcess slaveProcess;

		test_KErrNone(slaveProcess.Create(KAliasProcessName, KNullDesC));

		test_KErrNone(slaveProcess.SetParameter(1, aProcessId));

		test_KErrNone(slaveProcess.SetParameter(2, fillValue));

		TRequestStatus slaveStatus;

		slaveProcess.Logon(slaveStatus);

		test_Equal(KRequestPending, slaveStatus.Int());

		slaveProcess.Resume();

		// Wait for the connect message from the slave process.

		masterServer.Receive(masterMessage);

		test_Equal(ESlaveConnect, masterMessage.Function());

		SThreadData threadData;

		threadData.iFillValue = fillValue;

		threadData.iChunkSize = KChunkSize;

		threadData.iProcessId = aProcessId;

		RThread readThread;

		r = readThread.Create(KNullDesC, ChunkReadThread, 10 * pageSize, KChunkSize, KChunkSize * 2, &threadData);

		test_KErrNone(r);

		TRequestStatus threadStatus;

		readThread.Logon(threadStatus);

		test_Equal(KRequestPending, threadStatus.Int());

		readThread.Resume();

		PRINTF(T_PRINTF(_L("Process ID %d Wait for alias thread to start server\n"), aProcessId));

		RMessage2 aliasMessage;

		masterServer.Receive(aliasMessage);

		test_Equal(ESlaveConnect, aliasMessage.Function());

		aliasMessage.Complete(KErrNone);

		// Signal to the slave process to send chunk to alias thread.

		PRINTF(T_PRINTF(_L("Process ID %d Signal to slave to send chunk to alias\n"), aProcessId));

		masterMessage.Complete(KErrNone);

		// Wait for slave to close the chunk and fill it with new value.

		for (;;)

			{

			masterServer.Receive(masterMessage);

			TInt func = masterMessage.Function();

			PRINTF(T_PRINTF(_L("Process ID %d rxd %d\n"), aProcessId, func));

			if (func == ESlaveClosedChunk)

				{// Slave closed the chunk.

				memset(chunk.Base(), ++fillValue, KChunkSize);

				break;

				}

			else

				{// Alias has read the chunk and completed.

				test_Equal(ESlaveDisconnect, func);

				}

			}

		PRINTF(T_PRINTF(_L("Process ID %d Wait for alias to complete\n"), aProcessId));

		masterMessage.Complete(KErrNone);

		User::WaitForRequest(threadStatus);

		TInt statusInt = threadStatus.Int();

		test_Value(	statusInt, 

					statusInt == KErrNone || 

					statusInt == KErrBadDescriptor ||

					statusInt == KErrDied);

		test_Equal(EExitKill, readThread.ExitType());

		readThread.Close();

		PRINTF(T_PRINTF(_L("Process ID %d Wait for slave to complete\n"), aProcessId));

		User::WaitForRequest(slaveStatus);

		test_Equal(EExitKill, slaveProcess.ExitType());

		test_Equal(KErrNone, slaveProcess.ExitReason());

		slaveProcess.Close();

		masterServer.Close();

		}

	chunk.Close();

	return 0;

	}

GLDEF_C TInt E32Main()

	{

	TInt processId;

	if(User::GetTIntParameter(1, processId)==KErrNone)

		{

		test_KErrNone(ChunkName.Create(KAliasChunkName.Length() + 3));

		ChunkName.Copy(KAliasChunkName);

		ChunkName.AppendNum(processId);

		test_KErrNone(MasterServerName.Create(KMasterServerName.Length() + 3));

		MasterServerName.Copy(KMasterServerName);

		MasterServerName.AppendNum(processId);

		test_KErrNone(AliasServerName.Create(KAliasServerName.Length() + 3));

		AliasServerName.Copy(KAliasServerName);

		AliasServerName.AppendNum(processId);

		TInt fillValue;

		if(User::GetTIntParameter(2, fillValue)==KErrNone)

			{

			return SlaveProcess(processId, fillValue);

			}

		return MasterProcess(processId);

		}

	// Get the number of cpus and use it to determine how many processes to execute.

	RPageMove pagemove;

	test_KErrNone(pagemove.Open());

	TUint masterProcesses = pagemove.NumberOfCpus() + 1;

	pagemove.Close();

	TInt cmdLineLen = User::CommandLineLength();

	if(cmdLineLen)

		{

		RBuf cmdLine;

		test_KErrNone(cmdLine.Create(cmdLineLen));

		User::CommandLine(cmdLine);

		test_KErrNone(TLex(cmdLine).Val(masterProcesses));

		}

	test.Title();

	test.Start(_L(""));

	test.Printf(_L("Create %d processes for accessing aliases being removed\n"), masterProcesses); 

	TUint32 debugMask = UserSvr::DebugMask();

	User::SetDebugMask(0);

	// Start master processes to alias memory between each other.

	RProcess* masters = new RProcess[masterProcesses];

	TRequestStatus* masterStatus = new TRequestStatus[masterProcesses];

	TUint i = 0;

	for (; i < masterProcesses; i++)

		{

		test_KErrNone(masters[i].Create(KAliasProcessName, KNullDesC));

		test_KErrNone(masters[i].SetParameter(1, i));

		masters[i].Logon(masterStatus[i]);

		test_Equal(KRequestPending, masterStatus[i].Int());

		}

	test.Next(_L("Resume the processes")); 

	for (i = 0; i < masterProcesses; i++)

		{

		masters[i].Resume();

		}

	test.Next(_L("Wait for processes to exit")); 

	for (i = 0; i < masterProcesses; i++)

		{

		User::WaitForRequest(masterStatus[i]);

		test_Equal(EExitKill, masters[i].ExitType());

		test_Equal(KErrNone, masters[i].ExitReason());

		}

	User::SetDebugMask(debugMask);

	delete masterStatus;

	delete masters;

	test.Printf(_L("\n"));

	test.End();

	return KErrNone;

	}