// extrabtracek.h

// 

// Copyright (c) 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "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:

// Accenture - Initial contribution

//

#ifndef EXTRABTRACEK_H

#define EXTRABTRACEK_H

#include <fshell/extrabtrace.h>

#include <kernel/kern_priv.h>

// This class avoids exporting functions from extrabtracek.ldd - something that has proved problematic on certain platforms

class MExtraBtrace

	{

public:

	typedef void (*TCpuUsageCallback)(NThread*, NThread*); // First arg is previous thread, second is current

	virtual void SetCpuUsageSampling(TCpuUsageCallback aCallbackFn)=0;

	virtual void SetProfilingSampling(TBool aEnabled)=0;

	virtual TAny* GetVersion(TInt aVersion)=0;

	virtual void MExtraBtrace_Close()=0;

	};

class DCpuSampler;

class DExtraBtraceEventHandler;

class DExtraBTraceFactory : public DLogicalDevice, public MExtraBtrace

	{

public:

	virtual TInt Install();

	virtual void GetCaps(TDes8& aDes) const;

	virtual TInt Create(DLogicalChannelBase*& aChannel);

	~DExtraBTraceFactory();

public: // From MExtraBtrace

	void SetCpuUsageSampling(TCpuUsageCallback aCallbackFn);

	void SetProfilingSampling(TBool aEnabled);

	TAny* GetVersion(TInt aVersion);

	void MExtraBtrace_Close();

public:

#ifndef __SMP__

	DCpuSampler* iSampler;

#endif

	DExtraBtraceEventHandler* iEventHandler;

	};

// This function avoids using WSD in extrabtracek.ldd - something that, again, has proved problematic on certain platforms

// (And it's inline because of aforementioned exports problem)

static MExtraBtrace* OpenExtraBtrace()

	{

	__ASSERT_CRITICAL;

	// Find the extrabtrace DLogicalDevice

	DLogicalDevice* ldd = NULL;

	DObjectCon* ldds = Kern::Containers()[ELogicalDevice];

	_LIT(KLogicalDeviceName, "extrabtrace");

	TKName resultname;

#ifdef FSHELL_9_1_SUPPORT

	TInt findHandle;

#else

	TFindHandle findHandle;

#endif

	TInt found = ldds->FindByName(findHandle, KLogicalDeviceName, resultname);

	if (found == KErrNone)

		{

		ldds->Wait();

#ifdef FSHELL_9_1_SUPPORT

		ldd = static_cast<DLogicalDevice*>(ldds->At(findHandle));

#else

		if (findHandle.Index() <= ldds->Count()) ldd = static_cast<DLogicalDevice*>((*ldds)[findHandle.Index()]);

#endif

		if (ldd && ldd->Open() != KErrNone) ldd = NULL;

		ldds->Signal();

		if (ldd)

			{

			return static_cast<DExtraBTraceFactory*>(ldd);

			}

		}

	return NULL;

	}

#endif