author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:57:14 +0300 | |
branch | RCL_3 |
changeset 44 | 26645d81f48d |
parent 11 | 667e88a979d7 |
child 45 | cc28652e0254 |
permissions | -rw-r--r-- |
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// Copyright (c) 2008-2010 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 "SqlAssert.h" |
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#include "SqlCompact.h" |
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#include "SqlCompactEntry.h" |
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#include "SqlCompactTimer.h" |
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#include "SqlUtil.h" |
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#include "OstTraceDefinitions.h" |
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#ifdef OST_TRACE_COMPILER_IN_USE |
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#include "SqlCompactTraces.h" |
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#endif |
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#include "SqlTraceDef.h" |
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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Initializes the background compaction settings with their default values. |
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*/ |
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TSqlCompactSettings::TSqlCompactSettings() : |
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iStepLength(KSqlCompactStepLengthMs), |
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iFreePageThresholdKb(KSqlCompactFreePageThresholdKb) |
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{ |
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} |
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#ifdef _DEBUG |
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/** |
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CSqlCompactSettings invariant. |
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*/ |
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void TSqlCompactSettings::Invariant() const |
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{ |
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__ASSERT_DEBUG(iStepLength > 0, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iFreePageThresholdKb >= 0, __SQLPANIC(ESqlPanicInternalError)); |
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} |
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#endif//_DEBUG |
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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/** |
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The granularity of the container maintained by CSqlCompactor |
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@see CSqlCompactor |
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@internalComponent |
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*/ |
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const TInt KEntriesGranularity = 16; |
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/** |
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Creates a new CSqlCompactor instance. |
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@param aConnFactoryL MSqlCompactConn factory function. |
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@param aCompactStepInterval The time interval (ms) between the background compaction steps. |
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@return A pointer to the created CSqlCompactor instance |
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@leave KErrNoMemory, an out of memory condition has occurred; |
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Note that the function may also leave with some other database specific |
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errors categorised as ESqlDbError, and other system-wide error codes. |
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@panic SqlDb 4 In _DEBUG mode. NULL aConnFactoryL. |
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@panic SqlDb 4 In _DEBUG mode. Zero or negative aCompactStepInterval. |
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*/ |
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CSqlCompactor* CSqlCompactor::NewL(TSqlCompactConnFactoryL aConnFactoryL, TInt aCompactStepInterval) |
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{ |
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__ASSERT_DEBUG(aConnFactoryL != NULL, __SQLPANIC2(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aCompactStepInterval > 0, __SQLPANIC2(ESqlPanicBadArgument)); |
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CSqlCompactor* self = new (ELeave) CSqlCompactor(aConnFactoryL); |
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CleanupStack::PushL(self); |
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self->ConstructL(aCompactStepInterval); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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/** |
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Destroys the CSqlCompactor instance. |
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Any entries left in the container will be destroyed. |
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*/ |
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CSqlCompactor::~CSqlCompactor() |
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{ |
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for(TInt idx=iEntries.Count()-1;idx>=0;--idx) |
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{ |
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__ASSERT_DEBUG(iEntries[idx] != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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while(iEntries[idx]->Release() != 0) |
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{ |
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} |
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} |
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iEntries.Close(); |
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delete iTimer; |
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} |
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105 |
|
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106 |
/** |
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Restarts the background compaction timer. |
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This function should be called from the server side session object's ServiceL(). |
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If ServiceL() is being executed at the moment, it is very likely that the SQL client(s) will issue another |
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request few ms later. In order to not delay the processing of the client(s) requests, ServiceL() should call |
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at the end RestartTimer(). If there are database entries scheduled for a background compaction, the compaction |
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will be delayed by the time interval used by the CSqlCompactTimer object (default value - KSqlCompactStepInterval). |
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113 |
|
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@see CSqlCompactTimer |
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@see KSqlCompactStepInterval |
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*/ |
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void CSqlCompactor::RestartTimer() |
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118 |
{ |
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SQLCOMPACTOR_INVARIANT(); |
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iTimer->Restart(); |
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SQLCOMPACTOR_INVARIANT(); |
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} |
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123 |
|
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124 |
/** |
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125 |
If an entry referring to a database with name aFullName does not exist in the container, a new entry will be created, |
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a connection with the database established. |
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If an entry with the specified name already exists, no new entry wil be created, the reference counter of the existing one |
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will be incremented. |
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129 |
|
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@param aFullName The full database name, including the path. |
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@param aSettings Per-database background compaction settings |
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132 |
|
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@leave KErrNoMemory, an out of memory condition has occurred; |
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Note that the function may also leave with some other database specific |
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errors categorised as ESqlDbError, and other system-wide error codes. |
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136 |
|
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@panic SqlDb 4 In _DEBUG mode. Too short or too long database name (aFullName parameter) |
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@panic SqlDb 7 In _DEBUG mode. An entry with the specified name has been found but the entry is NULL. |
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139 |
*/ |
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void CSqlCompactor::AddEntryL(const TDesC& aFullName, const TSqlCompactSettings& aSettings) |
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141 |
{ |
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__ASSERT_DEBUG(aFullName.Length() > 0 && aFullName.Length() <= KMaxFileName, __SQLPANIC(ESqlPanicBadArgument)); |
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SQLCOMPACTOR_INVARIANT(); |
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CSqlCompactEntry* entry = NULL; |
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TInt idx = iEntries.FindInOrder(aFullName, &CSqlCompactor::Search); |
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if(idx == KErrNotFound) |
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147 |
{ |
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SQL_TRACE_COMPACT(OstTraceExt4(TRACE_INTERNALS, CSQLCOMPACTOR_ADDENTRYL1, "0x%X;CSqlCompactor::AddEntryL;New entry;aFullName=%S;iStepLength=%d;iFreePageThreashold=%d", (TUint)this, __SQLPRNSTR(aFullName), aSettings.iStepLength, aSettings.iFreePageThresholdKb)); |
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entry = CSqlCompactEntry::NewLC(aFullName, iConnFactoryL, aSettings, *iTimer); |
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TLinearOrder<CSqlCompactEntry> order(&CSqlCompactor::Compare); |
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__SQLLEAVE_IF_ERROR(iEntries.InsertInOrder(entry, order)); |
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CleanupStack::Pop(entry); |
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153 |
} |
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154 |
else |
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155 |
{ |
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SQL_TRACE_COMPACT(OstTraceExt4(TRACE_INTERNALS, CSQLCOMPACTOR_ADDENTRYL2, "0x%X;CSqlCompactor::AddEntryL;Reuse entry;aFullName=%S;iStepLength=%d;iFreePageThreashold=%d", (TUint)this, __SQLPRNSTR(aFullName), aSettings.iStepLength, aSettings.iFreePageThresholdKb)); |
0
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entry = iEntries[idx]; |
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__ASSERT_DEBUG(entry != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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159 |
(void)entry->AddRef(); |
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160 |
} |
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SQLCOMPACTOR_INVARIANT(); |
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162 |
} |
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163 |
|
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164 |
/** |
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165 |
Decrements the reference counter of the specified entry. |
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If the counter reaches zero, the entry will be destroyed and removed from the container, |
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the database connection - closed. |
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168 |
|
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@param aFullName The full database name, including the path. |
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*/ |
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void CSqlCompactor::ReleaseEntry(const TDesC& aFullName) |
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172 |
{ |
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SQL_TRACE_COMPACT(OstTraceExt2(TRACE_INTERNALS, CSQLCOMPACTOR_RELEASEENTRY1, "0x%X;CSqlCompactor::ReleaseEntry;aFullName=%S", (TUint)this, __SQLPRNSTR(aFullName))); |
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SQLCOMPACTOR_INVARIANT(); |
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TInt idx = iEntries.FindInOrder(aFullName, &CSqlCompactor::Search); |
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__ASSERT_DEBUG(idx >= 0, __SQLPANIC(ESqlPanicInternalError)); |
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if(idx >= 0) |
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178 |
{ |
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CSqlCompactEntry* entry = iEntries[idx]; |
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__ASSERT_DEBUG(entry != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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if(entry) |
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{ |
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if(entry->Release() == 0) |
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184 |
{ |
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iEntries.Remove(idx); |
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#ifdef _DEBUG |
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//This is used prevent the failure of the resource allocation checking for debug mode. |
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if(iEntries.Count() == 0) |
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{ |
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iEntries.Reset(); |
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} |
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#endif |
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} |
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} |
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} |
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SQLCOMPACTOR_INVARIANT(); |
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} |
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198 |
|
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/** |
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Initializes the CSqlCompactor data members with their default values. |
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@param aConnFactoryL MSqlCompactConn factory function. |
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@panic SqlDb 4 In _DEBUG mode. NULL aConnFactoryL. |
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*/ |
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CSqlCompactor::CSqlCompactor(TSqlCompactConnFactoryL aConnFactoryL) : |
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iConnFactoryL(aConnFactoryL), |
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iEntries(KEntriesGranularity) |
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{ |
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__ASSERT_DEBUG(aConnFactoryL != NULL, __SQLPANIC(ESqlPanicBadArgument)); |
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} |
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/** |
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Initializes the created CSqlCompactor instance. |
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@param aCompactStepInterval The time interval between the background compaction steps. |
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@panic SqlDb 4 In _DEBUG mode. Zero or negative aCompactStepInterval. |
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*/ |
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void CSqlCompactor::ConstructL(TInt aCompactStepInterval) |
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{ |
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__ASSERT_DEBUG(aCompactStepInterval > 0, __SQLPANIC(ESqlPanicBadArgument)); |
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iTimer = CSqlCompactTimer::NewL(aCompactStepInterval); |
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} |
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/** |
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Static method used internally for performing a search in the container using database name as a key. |
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@param aFullName The full database name, including the path. |
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@param aEntry CSqlCompactor reference. |
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*/ |
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/* static */TInt CSqlCompactor::Search(const TDesC* aFullName, const CSqlCompactEntry& aEntry) |
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{ |
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__ASSERT_DEBUG(&aEntry != NULL, __SQLPANIC2(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(aFullName != NULL, __SQLPANIC2(ESqlPanicInternalError)); |
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const TDesC& fullName = *aFullName; |
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__ASSERT_DEBUG(fullName.Length() > 0 && fullName.Length() <= KMaxFileName, __SQLPANIC2(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(aEntry.FullName().Length() > 0 && aEntry.FullName().Length() <= KMaxFileName, __SQLPANIC2(ESqlPanicInternalError)); |
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return fullName.CompareF(aEntry.FullName()); |
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} |
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/** |
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Static method used internally for performing a search in the container using a CSqlCompactEntry reference as a key. |
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*/ |
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/* static */TInt CSqlCompactor::Compare(const CSqlCompactEntry& aLeft, const CSqlCompactEntry& aRight) |
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{ |
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__ASSERT_DEBUG(&aLeft != NULL, __SQLPANIC2(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(&aRight != NULL, __SQLPANIC2(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(aLeft.FullName().Length() > 0 && aLeft.FullName().Length() <= KMaxFileName, __SQLPANIC2(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(aRight.FullName().Length() > 0 && aRight.FullName().Length() <= KMaxFileName, __SQLPANIC2(ESqlPanicInternalError)); |
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return aLeft.FullName().CompareF(aRight.FullName()); |
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} |
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#ifdef _DEBUG |
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/** |
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CSqlCompactor invariant. |
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*/ |
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void CSqlCompactor::Invariant() const |
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{ |
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__ASSERT_DEBUG(iConnFactoryL != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iTimer != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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iTimer->Invariant(); |
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for(TInt idx=iEntries.Count()-1;idx>=0;--idx) |
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{ |
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__ASSERT_DEBUG(iEntries[idx] != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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iEntries[idx]->Invariant(); |
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} |
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} |
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#endif//_DEBUG |