// Copyright (c) 1995-2009 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\realtime\t_latncy.cpp

// 

//

#include <e32test.h>

#include <e32svr.h>

LOCAL_D RTest test(_L("Latency"));

LOCAL_D CConsoleBase* console=NULL;

struct SLatencyValues

	{

	TUint iAddress;

	TUint iLatencies;

	TUint iThreadIds;

	TUint iSwi;

	};

struct SMaxLatencyValues

	{

	TInt iMaxIntLatency;

	TUint iMaxIntLatencyRetAddr;

	TInt iMaxThreadLatency;

	TUint iMaxThreadLatencyRetAddr;

	};

extern void GetLatencyValues(TInt, TInt&, SLatencyValues*);

inline TInt* NullTIntPtr()	// to allow generation of a NULL reference without the compiler complaining

	{ return 0; }

void GetMaxLatencyValues(SMaxLatencyValues& a)

	{

	GetLatencyValues(2,*NullTIntPtr(),(SLatencyValues*)&a);

	}

LOCAL_C void DumpValues(TInt aCount, SLatencyValues* aValues)

	{

	TInt i;

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

		{

		SLatencyValues v=aValues[i];

		TInt addr=v.iAddress;

		TInt iticks=v.iLatencies>>16;

		TInt tticks=v.iLatencies & 0xffff;

		TInt ius=(iticks*125+124)>>6;

		TInt tus=(tticks*125+124)>>6;

//		TInt oldtid=v.iThreadIds & 0xffff;

//		TInt newtid=v.iThreadIds >> 16;

		TInt swi=v.iSwi;

		RDebug::Print(_L("%08x %4d %4d %08x %08x"),addr,ius,tus,v.iThreadIds,swi);

		}

	}

LOCAL_C void DisplayMaxLatencyValues()

	{

	SMaxLatencyValues v;

	GetMaxLatencyValues(v);

	TInt ius=(v.iMaxIntLatency*125+124)>>6;

	TInt tus=(v.iMaxThreadLatency*125+124)>>6;

	console->Printf(_L("Interrupt: %4dus return address %08x\n"),ius,v.iMaxIntLatencyRetAddr);

	console->Printf(_L("Thread:    %4dus return address %08x\n"),tus,v.iMaxThreadLatencyRetAddr);

	}

GLDEF_C TInt E32Main()

	{

	TInt c;

	SLatencyValues* pV=new SLatencyValues[28672];

	test.Title();

	console=test.Console();

	if (!pV)

		User::Panic(_L("OOM"),0);

	TBool exit=EFalse;

	while(!exit)

		{

		TKeyCode k=test.Getch();

		switch(k)

			{

			case '0':

				console->Printf(_L("Getting Latency Values\n"));

				GetLatencyValues(0,c,pV);

				DumpValues(c,pV);

				break;

			case '1':

				console->Printf(_L("Clearing Latency Values\n"));

				GetLatencyValues(1,c,pV);

				break;

			case '2':

				DisplayMaxLatencyValues();

				break;

			case 'x':

			case 'X':

				exit=ETrue;

				break;

			default:

				break;

			}

		}

	test.End();

	return 0;

	}