author | hgs |
Tue, 06 Jul 2010 11:54:49 +0100 | |
changeset 31 | ba1c4f4a893f |
parent 29 | cce6680bbf1c |
child 45 | cc28652e0254 |
child 51 | 7d4490026038 |
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 <e32debug.h> |
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#include <hal.h> |
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#include <sqldb.h> |
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#include "SqlAssert.h" |
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#include "SqlCompactEntry.h" |
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#include "SqlCompactTimer.h" |
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#include "SqliteSymbian.h" //TSqlFreePageCallback |
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#include "OstTraceDefinitions.h" |
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#ifdef OST_TRACE_COMPILER_IN_USE |
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#include "SqlCompactEntryTraces.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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Creates a new CSqlCompactEntry instance. |
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@param aFullName The full database name, including the path. |
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@param aConnFactoryL MSqlCompactConn factory function. |
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@param aSettings Background compaction settings/thresholds |
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@param aTimer The background compaction timer object |
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When the free pages threshold is reached, the background compaction |
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for this entry will be kicked-off. |
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@return A pointer to the created CSqlCompactEntry 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. Too short or too long database name (aFullName parameter) |
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@panic SqlDb 4 In _DEBUG mode. NULL aConnFactoryL. |
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*/ |
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CSqlCompactEntry* CSqlCompactEntry::NewLC(const TDesC& aFullName, TSqlCompactConnFactoryL aConnFactoryL, |
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const TSqlCompactSettings& aSettings, CSqlCompactTimer& aTimer) |
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{ |
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SQL_TRACE_COMPACT(OstTraceExt1(TRACE_INTERNALS, CSQLCOMPACTENTRY_NEWLC_ENTRY, "Entry;0;CSqlCompactEntry::NewLC;aFullName=%S", __SQLPRNSTR(aFullName))); |
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__ASSERT_DEBUG(aFullName.Length() > 0 && aFullName.Length() <= KMaxFileName, __SQLPANIC2(ESqlPanicBadArgument)); |
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__ASSERT_DEBUG(aConnFactoryL != NULL, __SQLPANIC2(ESqlPanicBadArgument)); |
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CSqlCompactEntry* self = new (ELeave) CSqlCompactEntry(aSettings, aTimer); |
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CleanupStack::PushL(self); |
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self->ConstructL(aFullName, aConnFactoryL); |
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SQL_TRACE_COMPACT(OstTrace1(TRACE_INTERNALS, CSQLCOMPACTENTRY_NEWLC_EXIT, "Exit;0x%X;CSqlCompactEntry::NewLC", (TUint)self)); |
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return self; |
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} |
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/** |
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Destroys the CSqlCompactEntry instance. The database connection will be closed. |
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*/ |
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CSqlCompactEntry::~CSqlCompactEntry() |
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{ |
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SQL_TRACE_COMPACT(OstTraceExt3(TRACE_INTERNALS, CSQLCOMPACTENTRY_CSQLCOMPACTENTRY2, "0x%X;CSqlCompactEntry::~CSqlCompactEntry;iState=%d;iPageCount=%d", (TUint)this, (TInt)iState, iPageCount)); |
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if(iState == CSqlCompactEntry::EInProgress) |
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{ |
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iTimer.DeQueue(*this); |
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} |
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if(iConnection) |
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{ |
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iConnection->Release(); |
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} |
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iFullName.Close(); |
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} |
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/** |
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Increments the entry reference counter. |
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@return The new reference counter value. |
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*/ |
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TInt CSqlCompactEntry::AddRef() |
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{ |
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SQL_TRACE_COMPACT(OstTraceExt4(TRACE_INTERNALS, CSQLCOMPACTENTRY_ADDREF, "0x%X;CSqlCompactEntry::AddRef;iState=%d;iPageCount=%d;iRefCounter=%d", (TUint)this, (TInt)iState, iPageCount, iRefCounter)); |
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SQLCOMPACTENTRY_INVARIANT(); |
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return ++iRefCounter; |
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} |
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/** |
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Decrements the entry reference counter. |
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If the counter reaches zero, the CSqlCompactEntry instance will be destroyed. |
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@return The new reference counter value. |
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*/ |
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TInt CSqlCompactEntry::Release() |
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{ |
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SQL_TRACE_COMPACT(OstTraceExt4(TRACE_INTERNALS, CSQLCOMPACTENTRY_RELEASE, "0x%X;CSqlCompactEntry::Release;iState=%d;iPageCount=%d;iRefCounter=%d", (TUint)this, (TInt)iState, iPageCount, iRefCounter)); |
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SQLCOMPACTENTRY_INVARIANT(); |
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TInt rc = --iRefCounter; |
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if(rc == 0) |
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{ |
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delete this; |
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} |
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return rc; |
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} |
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111 |
|
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/** |
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SQLite calls this function when the free pages count reaches the threshold. |
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The callback must have been registered at the moment of the database connection creation in order this to happen. |
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The callback implementation will schedule a background compaction (kicking-off the timer). |
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If a background compaction has already been scheduled, the implementation will only update the iPageCount data |
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meber value. |
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118 |
|
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@param aThis A pointer to the CSqlCompactEntry object for which the free page count reached or is above the threshold. |
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@param aFreePageCount Free pages count. |
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121 |
|
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@panic SqlDb 4 In _DEBUG mode. NULL aThis parameter. |
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@panic SqlDb 4 In _DEBUG mode. aFreePageCount is negative or zero. |
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*/ |
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/* static */ void CSqlCompactEntry::FreePageCallback(void* aThis, TInt aFreePageCount) |
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{ |
31 | 127 |
__ASSERT_DEBUG(aThis != NULL, __SQLPANIC2(ESqlPanicBadArgument)); |
128 |
__ASSERT_DEBUG(aFreePageCount > 0, __SQLPANIC2(ESqlPanicBadArgument)); |
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0
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129 |
|
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CSqlCompactEntry& entry = *(static_cast <CSqlCompactEntry*> (aThis)); |
31 | 131 |
SQL_TRACE_COMPACT(OstTraceExt3(TRACE_INTERNALS, CSQLCOMPACTENTRY_FREEPAGECALLBACK, "0x%X;CSqlCompactEntry::FreePageCallback;aFreePageCount=%d;iState=%d", (TUint)aThis, aFreePageCount, (TInt)entry.iState)); |
0
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if(entry.iFreePageCallbackDisabled) |
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{//The callback is disabled during the background compaction step. |
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//The server is single-threaded, so no other client can activate the callback. |
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//During the background compaction step the callback can be activated only by the completion of the background |
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//compaction in which case if "entry.iPageCount" is bigger than the threshold, the page counter will be set from here |
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//and set second time from CSqlCompactEntry::Compact() - the counter value will be reduced twice. |
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return; |
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} |
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140 |
|
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entry.iPageCount = aFreePageCount; |
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if(entry.iState == CSqlCompactEntry::EInactive) |
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143 |
{ |
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entry.iState = CSqlCompactEntry::EInProgress; |
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entry.iTimer.Queue(entry); |
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} |
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} |
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148 |
|
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/** |
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Initializes the CSqlCompactEntry data members with their default values. |
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151 |
|
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@param aSettings Background compaction settings/thresholds |
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*/ |
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CSqlCompactEntry::CSqlCompactEntry(const TSqlCompactSettings& aSettings, CSqlCompactTimer& aTimer) : |
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iSettings(aSettings), |
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iTimer(aTimer), |
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iRefCounter(1), |
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iState(CSqlCompactEntry::EInactive) |
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{ |
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} |
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161 |
|
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/** |
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Initializes the created CSqlCompactEntry instance. |
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Schedules a background compaction if the free pages count is above the threshold. |
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165 |
|
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@param aFullName The full database name, including the path. |
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@param aConnFactoryL MSqlCompactConn factory function. |
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168 |
|
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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 4 In _DEBUG mode. NULL aConnFactoryL. |
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@panic SqlDb 7 In _DEBUG mode. The CSqlCompactEntry instance has been initialized already. |
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*/ |
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void CSqlCompactEntry::ConstructL(const TDesC& aFullName, TSqlCompactConnFactoryL aConnFactoryL) |
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{ |
31 | 175 |
__ASSERT_DEBUG(aFullName.Length() > 0 && aFullName.Length() <= KMaxFileName, __SQLPANIC(ESqlPanicBadArgument)); |
176 |
__ASSERT_DEBUG(aConnFactoryL != NULL, __SQLPANIC(ESqlPanicBadArgument)); |
|
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__ASSERT_DEBUG(!iConnection, __SQLPANIC(ESqlPanicInternalError)); |
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0
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178 |
|
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__SQLLEAVE_IF_ERROR(iFullName.Create(aFullName)); |
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180 |
|
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//The second parameter of TSqlFreePageCallback's constructor is expected the be threshold in pages. |
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//But the connection is not established yet and the page size is not known. Hence the threshold parameter |
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//value is initialized with the threshold in Kbs. The connection construction is expected to convert |
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//the threshold from Kbs to pages when the connection with the database is established. |
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TSqlFreePageCallback callback(this, iSettings.iFreePageThresholdKb, &CSqlCompactEntry::FreePageCallback); |
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iConnection = (*aConnFactoryL)(aFullName, callback); |
31 | 187 |
__ASSERT_DEBUG(iConnection != NULL, __SQLPANIC(ESqlPanicInternalError)); |
0
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188 |
|
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//"callback.iThreshold > 0" is an indication that the background compaction should be kicked-off |
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if(callback.iThreshold > 0) |
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191 |
{ |
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//Kick-off the compaction timer, if the number of the free pages is above the threshold. |
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CSqlCompactEntry::FreePageCallback(this, callback.iThreshold); |
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} |
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195 |
|
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SQLCOMPACTENTRY_INVARIANT(); |
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} |
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|
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/** |
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Performs a compaction step on the database. |
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201 |
If the number of the free pages is bigger than the number of pages removed in one compaction step, |
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202 |
the function will reschedule itself for another compaction step. |
29 | 203 |
If the database file is corrupted, then the function will remove the database entry from the timer queue - |
204 |
the database won't be compacted anymore. |
|
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205 |
|
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@return KErrNoMemory, an out of memory condition has occurred; |
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Note that the function may also return some other database specific |
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errors categorised as ESqlDbError, and other system-wide error codes. |
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209 |
|
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@panic SqlDb 7 In _DEBUG mode. iPageCount <= 0 - no free pages to be processed. |
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@panic SqlDb 7 In _DEBUG mode. iState != CSqlCompactEntry::EInProgress. |
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*/ |
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TInt CSqlCompactEntry::Compact() |
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{ |
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SQL_TRACE_COMPACT(OstTraceExt3(TRACE_INTERNALS, CSQLCOMPACTENTRY_COMPACT_ENTRY, "Entry;0x%X;CSqlCompactEntry::Compact;aFreePageCount=%d;iState=%d", (TUint)this, iPageCount, (TInt)iState)); |
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SQLCOMPACTENTRY_INVARIANT(); |
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__ASSERT_DEBUG(iPageCount > 0, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iState == CSqlCompactEntry::EInProgress, __SQLPANIC(ESqlPanicInternalError)); |
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TInt processedPageCount = 0; |
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iFreePageCallbackDisabled = ETrue; |
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TInt err = Connection().Compact(iPageCount, processedPageCount, iSettings.iStepLength); |
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iFreePageCallbackDisabled = EFalse; |
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__ASSERT_DEBUG(processedPageCount >= 0, __SQLPANIC(ESqlPanicInternalError)); |
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if(err == KErrNone) |
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{ |
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iPageCount -= processedPageCount; |
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__ASSERT_DEBUG(iPageCount >= 0, __SQLPANIC(ESqlPanicInternalError)); |
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} |
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TBool stopCompaction = err == KSqlErrCorrupt || err == KSqlErrNotDb || err == KErrCorrupt || err == KErrDisMounted; |
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if(iPageCount <= 0 || stopCompaction) |
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{//No more pages to compact or the file is corrupted . Stop the compacting, move to EInactive state, remove from the timer queue. |
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ResetState(); |
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iTimer.DeQueue(*this); |
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} |
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SQL_TRACE_COMPACT(OstTraceExt4(TRACE_INTERNALS, CSQLCOMPACTENTRY_COMPACT_EXIT, "Exit;0x%X;CSqlCompactEntry::Compact;iPageCount=%d;iState=%d;err=%d", (TUint)this, iPageCount, (TInt)iState, err)); |
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SQLCOMPACTENTRY_INVARIANT(); |
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return err; |
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} |
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|
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/** |
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Returns the full database name, including the path. |
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|
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@return Full database name. |
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*/ |
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const TDesC& CSqlCompactEntry::FullName() const |
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{ |
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SQLCOMPACTENTRY_INVARIANT(); |
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return iFullName; |
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} |
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|
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/** |
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Resets the CSqlCompactEntry internal state. |
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That means - (1) no scheduled compaction step and (2) no pending free pages to be removed. |
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*/ |
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void CSqlCompactEntry::ResetState() |
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{ |
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SQLCOMPACTENTRY_INVARIANT(); |
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iState = CSqlCompactEntry::EInactive; |
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iPageCount = 0; |
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SQLCOMPACTENTRY_INVARIANT(); |
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} |
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/** |
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Returns a reference to the MSqlCompactConn interface. |
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@return A reference to the MSqlCompactConn interface. |
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@panic SqlDb 7 NULL MSqlCompactConn interface. |
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*/ |
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MSqlCompactConn& CSqlCompactEntry::Connection() |
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{ |
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SQLCOMPACTENTRY_INVARIANT(); |
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__ASSERT_ALWAYS(iConnection != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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return *iConnection; |
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} |
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#ifdef _DEBUG |
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/** |
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CSqlCompactEntry invariant. |
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*/ |
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void CSqlCompactEntry::Invariant() const |
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{ |
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__ASSERT_DEBUG(iFullName.Length() > 0 && iFullName.Length() <= KMaxFileName, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iConnection != NULL, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iRefCounter > 0, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iState == CSqlCompactEntry::EInactive || iState == CSqlCompactEntry::EInProgress, __SQLPANIC(ESqlPanicInternalError)); |
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__ASSERT_DEBUG(iPageCount >= 0, __SQLPANIC(ESqlPanicInternalError)); |
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iSettings.Invariant(); |
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} |
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#endif//_DEBUG |