persistentstorage/sql/SRC/Client/SqlResourceTest.cpp
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// Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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//
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#include <sqldb.h>				//TSqlResourceTester
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#include "SqlResourceTest.h"	//TSqlResourceTestData
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#include "SqlPanic.h"			//__SQLASSERT, ESqlPanicInternalError
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#include "SqlDbSession.h"		//RSqlDbSession
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#include "SqlResourceTester.h"		//TSqlResourceTester
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///////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////             TSqlResourceTestData                 /////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////
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#pragma BullseyeCoverage off
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0
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#ifdef _DEBUG
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/**
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Ensures that TSqlResourceTestData singleton is created and returns a pointer to the object.
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The function has a meaningfull implementation only in _DEBUG mode.
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@return A pointer to TSqlResourceTestData singleton. The return result might be NULL.
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*/
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TSqlResourceTestData* TSqlResourceTestData::Instance()
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	{
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	TSqlResourceTestData* instance = static_cast <TSqlResourceTestData*> (Dll::Tls());
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	if(!instance)
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		{
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		instance = new TSqlResourceTestData;
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		if(instance)
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			{
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			if(Dll::SetTls(instance) != KErrNone)
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				{
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				delete instance;	
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				instance = NULL;
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				}
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			}
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		}
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	return instance;
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	}
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/**
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Destroys TSqlResourceTestData singleton.
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The function has a meaningfull implementation only in _DEBUG mode.
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*/
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void TSqlResourceTestData::Release()
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	{
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	TSqlResourceTestData* instance = static_cast <TSqlResourceTestData*> (Dll::Tls());
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	delete instance;
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	(void)Dll::SetTls(NULL);
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	}
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/**
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Initializes TSqlResourceTestData singleton with a reference to RSqlDbSession instance.
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If a test data has been previously set by calling TSqlResourceTestData::Set(), then
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the test data will be sent now to the SQL server.
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The function has a meaningfull implementation only in _DEBUG mode.
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@param aDbSession A reference to RDbSession instance.
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@return KErrNone The call completed successfully, system-wide error code otherwise.
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*/
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TInt TSqlResourceTestData::Init(RSqlDbSession& aDbSession)
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	{
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	iDbSession = &aDbSession;
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	TInt rc = KErrNone;
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	if(iRqPending)
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		{
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		rc = iDbSession->SendReceive(iFunction, TIpcArgs(iAllocFailType, iRate));
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		}
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	iRqPending = EFalse;
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	return rc;
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	}
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/**
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If the TSqlResourceTestData singleton is already initialized (TSqlResourceTestData::Init() call),
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then the test command and data will be sent directly to the SQL server. Othwerwise the test command
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and data will be stored and sent later when the TSqlResourceTestData singleton gets initialized.
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The function has a meaningfull implementation only in _DEBUG mode.
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@param aFunction Test command to be sent to the SQL server
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@param aAllocFailType Heap failure allocation type
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@param arate Heap failure rate
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@return KErrNone The call completed successfully, system-wide error code otherwise.
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*/
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TInt TSqlResourceTestData::Set(TSqlSrvFunction aFunction, TInt aAllocFailType, TInt aRate)
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	{
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	__SQLASSERT(!iRqPending, ESqlPanicMisuse);
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	if(iDbSession)	
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		{
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		return iDbSession->SendReceive(aFunction, TIpcArgs(aAllocFailType, aRate));
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		}
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	else
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		{
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		iFunction = aFunction;
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		iAllocFailType = aAllocFailType;
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		iRate = aRate;
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		iRqPending = ETrue;
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		return KErrNone;
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		}
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	}
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/**
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The function has a meaningfull implementation only in _DEBUG mode.
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*/
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TSqlResourceTestData::TSqlResourceTestData() :
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	iRqPending(EFalse),
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	iDbSession(NULL),
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	iFunction(ESqlSrvTestBase),
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	iAllocFailType(RHeap::ENone),
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	iRate(0)
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	{
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	}
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///////////////////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////             TSqlResourceTester                 ///////////////////////////////
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///////////////////////////////////////////////////////////////////////////////////////////////////////
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//Sends a test command to the SQL server.
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//aFunction parameter is the test command code to be sent, 
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//aAllocFailType is the heap failure type, aRate is the heap failure rate.
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//
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//The function will get a pointer to the TSqlResourceTestData instance and call its Set() method to
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//send the test command and data.
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static TInt SendCommand(TSqlSrvFunction aFunction, TInt aAllocFailType, TInt aRate)
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	{
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	TInt rc = KErrNoMemory;
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	TSqlResourceTestData* instance = TSqlResourceTestData::Instance();
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	if(instance)
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		{
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		rc = instance->Set(aFunction, aAllocFailType, aRate);
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		}
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	return rc;
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	}
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//Sends a test command to the SQL server.
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//aFunction parameter is the test command code to be sent, 
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//
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//The function will get a pointer to the TSqlResourceTestData instance and call its Set() method to
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//send the test command and data.
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static TInt SendCommand(TSqlSrvFunction aFunction)
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	{
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	return SendCommand(aFunction, RHeap::ENone, 0);
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	}
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/**
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Sends a request to the SQL server to mark the allocated resources.
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The function has a meaningfull implementation only in _DEBUG mode.
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*/
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EXPORT_C void TSqlResourceTester::Mark()
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	{
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	(void)::SendCommand(ESqlSrvResourceMark);
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	}
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/**
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Sends a request to the SQL server to check the allocated resources.
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(to compare their count with the marked resource count, made by the 
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 TSqlResourceTester::Mark() call)
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The function has a meaningfull implementation only in _DEBUG mode.
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*/
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EXPORT_C void TSqlResourceTester::Check()
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	{
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	(void)::SendCommand(ESqlSrvResourceCheck);
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	}
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/**
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@return Count of the allocated SQL server resources.
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The function has a meaningfull implementation only in _DEBUG mode.
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*/
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EXPORT_C TInt TSqlResourceTester::Count()
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	{
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	return ::SendCommand(ESqlSrvResourceCount);
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	}
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/**
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Sends a request to the SQL server to simulate out of memory failure.
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This call can be used to test the server side of RSqlDatabase class.
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The function has a meaningfull implementation only in _DEBUG mode.
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@param aAllocFailType Heap failure allocation type
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	   	If bit 12 of aAllocFailType is set, then the SQL server will delay
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	   	the heap failure simulation until the database is opened.
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@param arate Heap failure rate
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*/
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EXPORT_C void TSqlResourceTester::SetDbHeapFailure(TInt aAllocFailType, TInt aRate)
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	{
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	if(static_cast <RHeap::TAllocFail> (aAllocFailType) == RHeap::ENone)
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		{
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		//This is a command to reset the memory allocation failure simulation.
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		//Execute it only if there is a valid TSqlResourceTestData instance.
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		//Otherwise this function will try to allocate memory for TSqlResourceTestData instance
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		//and this happens at the moment when the request is for stopping the simulation (so the OOM test).
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		//The test application will find one more memory cell is allocated and will fail.
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		TSqlResourceTestData* instance = static_cast <TSqlResourceTestData*> (Dll::Tls());
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		if(!instance)
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			{
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			return;	
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			}
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		}
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	(void)::SendCommand(ESqlSrvSetDbHeapFailure, aAllocFailType, aRate);
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	}
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   223
	
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/**
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Sends a request to the SQL server to simulate out of memory failure.
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This call can be used to test the server side of RSqlStatement class.
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The function has a meaningfull implementation only in _DEBUG mode.
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@param aAllocFailType Heap failure allocation type
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@param arate Heap failure rate
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*/
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EXPORT_C void TSqlResourceTester::SetHeapFailure(TInt aAllocFailType, TInt aRate)
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	{
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	if(static_cast <RHeap::TAllocFail> (aAllocFailType) == RHeap::ENone)
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		{
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		//This is a command to reset the memory allocation failure simulation.
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		//Execute it only if there is a valid TSqlResourceTestData instance.
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		//Otherwise this function will try to allocate memory for TSqlResourceTestData instance
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		//and this happens at the moment when the request is for stopping the simulation (so the OOM test).
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		//The test application will find one more memory cell is allocated and will fail.
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		TSqlResourceTestData* instance = static_cast <TSqlResourceTestData*> (Dll::Tls());
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		if(!instance)
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			{
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			return;	
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			}
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		}
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	(void)::SendCommand(ESqlSrvSetHeapFailure, aAllocFailType, aRate);
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	}
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#else //_DEBUG
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void TSqlResourceTestData::Release()
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	{
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	}
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EXPORT_C void TSqlResourceTester::Mark()
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	{
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	}
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EXPORT_C void TSqlResourceTester::Check()
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	{
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	}
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EXPORT_C TInt TSqlResourceTester::Count()
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	{
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	return 0;
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	}
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EXPORT_C void TSqlResourceTester::SetDbHeapFailure(TInt, TInt)
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	{
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	}
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EXPORT_C void TSqlResourceTester::SetHeapFailure(TInt, TInt)
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	{
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	}
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#endif//_DEBUG
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#pragma BullseyeCoverage on