1 // extrabtracek.h

     2 // 

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

     4 // This component and the accompanying materials are made available

     5 // under the terms of the "Eclipse Public License v1.0"

     6 // which accompanies this distribution, and is available

     7 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 // 

     9 // Initial Contributors:

    10 // Accenture - Initial contribution

    11 //

    12 #ifndef EXTRABTRACEK_H

    13 #define EXTRABTRACEK_H

    14 

    15 #include <fshell/extrabtrace.h>

    16 #include <kernel/kern_priv.h>

    17 

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

    19 class MExtraBtrace

    20 	{

    21 public:

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

    23 	virtual void SetCpuUsageSampling(TCpuUsageCallback aCallbackFn)=0;

    24 	virtual void SetProfilingSampling(TBool aEnabled)=0;

    25 

    26 	virtual TAny* GetVersion(TInt aVersion)=0;

    27 	virtual void MExtraBtrace_Close()=0;

    28 	};

    29 

    30 

    31 class DCpuSampler;

    32 class DExtraBtraceEventHandler;

    33 

    34 class DExtraBTraceFactory : public DLogicalDevice, public MExtraBtrace

    35 	{

    36 public:

    37 	virtual TInt Install();

    38 	virtual void GetCaps(TDes8& aDes) const;

    39 	virtual TInt Create(DLogicalChannelBase*& aChannel);

    40 	~DExtraBTraceFactory();

    41 

    42 public: // From MExtraBtrace

    43 	void SetCpuUsageSampling(TCpuUsageCallback aCallbackFn);

    44 	void SetProfilingSampling(TBool aEnabled);

    45 	TAny* GetVersion(TInt aVersion);

    46 	void MExtraBtrace_Close();

    47 

    48 public:

    49 	DCpuSampler* iSampler;

    50 	DExtraBtraceEventHandler* iEventHandler;

    51 	};

    52 

    53 

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

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

    56 

    57 static MExtraBtrace* OpenExtraBtrace()

    58 	{

    59 	__ASSERT_CRITICAL;

    60 	// Find the extrabtrace DLogicalDevice

    61 	DLogicalDevice* ldd = NULL;

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

    63 	_LIT(KLogicalDeviceName, "extrabtrace");

    64 	TKName resultname;

    65 #ifdef FSHELL_9_1_SUPPORT

    66 	TInt findHandle;

    67 #else

    68 	TFindHandle findHandle;

    69 #endif

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

    71 	if (found == KErrNone)

    72 		{

    73 		ldds->Wait();

    74 #ifdef FSHELL_9_1_SUPPORT

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

    76 #else

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

    78 #endif

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

    80 		ldds->Signal();

    81 

    82 		if (ldd)

    83 			{

    84 			return static_cast<DExtraBTraceFactory*>(ldd);

    85 			}

    86 		}

    87 	return NULL;

    88 	}

    89 

    90 #endif