author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 18 Aug 2010 11:08:29 +0300 | |
changeset 247 | d8d70de2bd36 |
parent 201 | 43365a9b78a3 |
child 266 | 0008ccd16016 |
permissions | -rw-r--r-- |
0 | 1 |
// Copyright (c) 2006-2009 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 the License "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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// f32\sfile\sf_file_cache.cpp |
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// |
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// |
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/** |
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@file |
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@internalTechnology |
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*/ |
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#include <e32std.h> |
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#include <e32std_private.h> |
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#include "sf_std.h" |
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#include <e32uid.h> |
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#include <e32wins.h> |
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#include <f32file.h> |
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#include <hal.h> |
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#include "sf_file_cache.h" |
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#include "sf_cache_man.h" |
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#include "sf_cache_client.h" |
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#include "sf_file_cache_defs.h" |
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#ifdef OST_TRACE_COMPILER_IN_USE |
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#include "sf_file_cacheTraces.h" |
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#endif |
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// disables flushing of stale cachelines before each write |
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#define LAZY_WRITE |
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// call SetSizeL() to pre-allocate FAT clusters before flushing dirty data |
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#define SETSIZE_BEFORE_WRITE |
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enum TFileCacheFault |
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{ |
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ECacheSettingsInitFailed, |
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ECacheSettingsNotFound, |
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ECacheSettingGetFailed, |
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ECacheCodeFault, |
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ECacheBadOperationIndex, |
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ENoFileCache, |
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EFileAlreadyClosed, |
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EClosingDirtyFile, |
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ECompletingWriteWithDataRemaining, |
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EPosBeyondSize, |
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EMsgAlreadyCompleted, |
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EBadRetCode, |
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EInternalError, |
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ERequestUncancelled, |
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ELockAlreadyOpen, |
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EBadSegmentCount, |
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EReNewingOpenCache, |
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EClosingUnNamedFile, |
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EFileNameAlreadyOwned, |
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EClosedFileHasNoName, |
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EReOpeningUnNamedFile, |
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EStartingDirtyAWrongStage, |
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EUnexpectedReNewLFailure, |
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EDirtyDataOwnerNull, |
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EFlushingWithSessionNull, |
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EFlushingWithAllocatedRequest, |
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}; |
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LOCAL_C void Fault(TFileCacheFault aFault) |
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// |
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// Report a fault in the file cache |
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// |
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{ |
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User::Panic(_L("FSFILECACHE"), aFault); |
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} |
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const TInt KMinSequentialReadsBeforeReadAhead = 3; |
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#ifdef DOUBLE_BUFFERED_WRITING |
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const TInt KMinSequentialAppendsBeforeFlush = 3; |
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#endif |
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//************************************ |
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// CFileCache |
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//************************************ |
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inline TBool ReadCachingEnabled(CFileShare& aShare) |
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{ |
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TUint mode = aShare.iMode; |
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TInt fileCacheFlags = TFileCacheSettings::Flags(aShare.File().Drive().DriveNumber()); |
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if (((mode & EFileReadBuffered) && (fileCacheFlags & (EFileCacheReadEnabled | EFileCacheReadOn))) || |
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(((mode & EFileReadDirectIO) == 0) && (fileCacheFlags & EFileCacheReadOn))) |
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{ |
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return ETrue; |
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} |
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else |
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{ |
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return EFalse; |
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} |
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} |
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inline TBool WriteCachingEnabled(CFileShare& aShare) |
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{ |
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TUint mode = aShare.iMode; |
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TInt fileCacheFlags = TFileCacheSettings::Flags(aShare.File().Drive().DriveNumber()); |
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if ((mode & EFileWrite) == 0) |
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{ |
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return EFalse; |
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} |
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else if (((mode & EFileWriteBuffered) && (fileCacheFlags & (EFileCacheWriteEnabled | EFileCacheWriteOn))) || |
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(((mode & EFileWriteDirectIO) == 0) && (fileCacheFlags & EFileCacheWriteOn))) |
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{ |
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return ETrue; |
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} |
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else |
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{ |
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return EFalse; |
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} |
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} |
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void CFileCache::SetFileCacheFlags(CFileShare& aShare) |
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{ |
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TInt fileCacheFlags = TFileCacheSettings::Flags(iDriveNum); |
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TUint& mode = aShare.iMode; |
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// enable/disable read ahead |
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if (((mode & EFileReadAheadOn) && (fileCacheFlags & (EFileCacheReadAheadEnabled | EFileCacheReadAheadOn))) || |
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(((mode & EFileReadAheadOff) == 0) && (fileCacheFlags & EFileCacheReadAheadOn))) |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: EFileCacheReadAhead ENABLED")); |
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mode|= EFileReadAheadOn; |
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} |
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else |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: EFileCacheReadAhead disabled")); |
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mode&= ~EFileReadAheadOn; |
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} |
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// enable/disable read caching |
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if (ReadCachingEnabled(aShare)) |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: EFileCacheRead ENABLED")); |
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mode|= EFileReadBuffered; |
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} |
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else |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: EFileCacheRead disabled")); |
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// if read caching is off, turn off read-ahead too |
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mode&= ~(EFileReadBuffered | EFileReadAheadOn); |
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} |
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// enable/disable write caching |
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if (WriteCachingEnabled(aShare)) |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: EFileCacheWrite ENABLED")); |
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mode|= EFileWriteBuffered; |
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} |
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else |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: EFileCacheWrite disabled")); |
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mode&= ~EFileWriteBuffered; |
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} |
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} |
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void CFileCache::ConstructL(CFileShare& aShare) |
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{ |
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iDrive = &aShare.File().Drive(); |
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iDriveNum = iDrive->DriveNumber(); |
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iMount=&iDrive->CurrentMount(); |
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DoInitL(iDriveNum); |
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CCacheManager* manager = CCacheManagerFactory::CacheManager(); |
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iCacheClient = manager->CreateClientL(); |
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manager->RegisterClient(*iCacheClient); |
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TInt segmentSize = SegmentSize(); |
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TInt segmentSizeMask = I64LOW(SegmentSizeMask()); |
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// Get file cache size |
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iCacheSize = TFileCacheSettings::CacheSize(iDriveNum); |
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// must be at least one segment |
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iCacheSize = Max(iCacheSize, segmentSize); |
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// round up to nearest whole segment |
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iCacheSize = (iCacheSize + segmentSize - 1) & segmentSizeMask; |
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// Get max read-ahead length |
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iMaxReadAheadLen = TFileCacheSettings::MaxReadAheadLen(iDriveNum); |
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// must be at least one segment |
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iMaxReadAheadLen = Max(iMaxReadAheadLen, segmentSize); |
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// round up to nearest whole segment |
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iMaxReadAheadLen = (iMaxReadAheadLen + segmentSize - 1) & segmentSizeMask; |
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// read-ahead should not be greater than the cache size minus one segment |
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iMaxReadAheadLen = Min(iMaxReadAheadLen, iCacheSize - segmentSize); |
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// ... or greater than one cacheline (128K should be enough !) |
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iMaxReadAheadLen = Min(iMaxReadAheadLen, iCacheClient->CacheLineSize()); |
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iFileCacheReadAsync = TFileCacheSettings::FileCacheReadAsync(iDriveNum); |
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iClosedFileKeepAliveTime = TFileCacheSettings::ClosedFileKeepAliveTime(iDriveNum); |
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iDirtyDataFlushTime = TFileCacheSettings::DirtyDataFlushTime(iDriveNum); |
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// Calculate max number of segments to cache |
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TInt maxSegmentsToCache = iCacheSize >> SegmentSizeLog2(); |
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__CACHE_PRINT1(_L("CACHEFILE: maxSegmentsToCache %d"), maxSegmentsToCache); |
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iCacheClient->SetMaxSegments(maxSegmentsToCache); |
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CFileCache* fileCache = ReNewL(aShare); |
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__ASSERT_ALWAYS(fileCache != NULL, Fault(EUnexpectedReNewLFailure)); |
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} |
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CFileCache* CFileCache::NewL(CFileShare& aShare) |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: CFileCache::NewL()")); |
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CFileCB* file = &aShare.File(); |
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if ((CCacheManagerFactory::CacheManager() == NULL) || |
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(!ReadCachingEnabled(aShare) && !WriteCachingEnabled(aShare)) || |
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(FsThreadManager::IsDriveSync(file->Drive().DriveNumber(),EFalse))) |
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return NULL; |
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CFileCache* fileCache = new(ELeave) CFileCache(); |
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CleanupClosePushL(*fileCache); |
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fileCache->ConstructL(aShare); |
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CleanupStack::Pop(1, fileCache); |
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return fileCache; |
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} |
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CFileCache* CFileCache::ReNewL(CFileShare& aShare) |
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{ |
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__CACHE_PRINT(_L("CACHEFILE: CFileCache::ReNewL()")); |
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// check not already open i.e. attached to a CFileCB |
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__ASSERT_DEBUG(iFileCB == NULL, Fault(EReNewingOpenCache)); |
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// make sure the drive thread exists (the mount may have been mounted |
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// synchronously since the drive was last open) |
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const TInt r = FsThreadManager::GetDriveThread(iDriveNum, &iDriveThread); |
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if ((r!= KErrNone) || !iDriveThread) |
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return NULL; |
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// if re-opening in DirectIo mode, destroy the file cache |
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if (!ReadCachingEnabled(aShare) && !WriteCachingEnabled(aShare)) |
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{ |
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Close(); |
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return NULL; |
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} |
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SetFileCacheFlags(aShare); |
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// assign ownership of this object to aFileCB before any leaves occur |
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iFileCB = &aShare.File(); |
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iFileCB->iBody->iFileCache = this; |
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__ASSERT_DEBUG(iLock.Handle() == KNullHandle, Fault(ELockAlreadyOpen)); |
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User::LeaveIfError(iLock.CreateLocal()); |
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// delete the file name to save heap space (it's only needed |
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// while the file is on the closed queue so that it can be matched) |
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delete iFileNameF; |
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iFileNameF = NULL; |
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return this; |
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} |
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void CFileCache::Init(CFileShare& aShare) |
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{ |
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SetFileCacheFlags(aShare); |
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} |
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CFileCache::CFileCache() : |
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iClosedTimer(ClosedTimerEvent, this), |
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iDirtyTimer(DirtyTimerEvent, this) |
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{ |
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} |
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CFileCache::~CFileCache() |
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{ |
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iLock.Close(); |
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// stop the owning CFileCB from pointing to an about-to-be deleted object |
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if (iFileCB && iFileCB->iBody) |
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iFileCB->iBody->iFileCache = NULL; |
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CCacheManagerFactory::CacheManager()->DeregisterClient(*iCacheClient); |
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delete iCacheClient; |
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delete iFileNameF; |
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} |
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TInt CFileCache::ClosedTimerEvent(TAny* aFileCache) |
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{ |
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TClosedFileUtils::Remove((CFileCache*) aFileCache); |
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return KErrNone; |
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} |
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TInt CFileCache::DirtyTimerEvent(TAny* aFileCache) |
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{ |
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// Cannot report errors here |
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// coverity [unchecked_value] |
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(void)((CFileCache*) aFileCache)->FlushDirty(); |
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return KErrNone; |
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} |
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void CFileCache::Close() |
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{ |
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__CACHE_PRINT1(_L("CFileCache::Close() 0x%x"),this); |
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TInt r = KErrNone; |
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#ifdef _DEBUG |
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if (iCacheClient) // NB Object may not have been fully constructed |
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{ |
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TInt64 pos; |
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TUint8* addr; |
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__ASSERT_DEBUG(((iCacheClient->FindFirstDirtySegment(pos, addr)) == 0), Fault(EClosingDirtyFile)); |
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__ASSERT_DEBUG(!iDirtyDataOwner, Fault(EClosingDirtyFile)); |
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} |
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#endif |
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343 |
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__CACHE_PRINT2(_L("CFileCache::Close() iFileCB %08X IsClosed %d"), |
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iFileCB, TClosedFileUtils::IsClosed(this)); |
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// if not already closed move to closed file queue |
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if (iFileCB != NULL && |
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!iFileCB->DeleteOnClose() && |
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!TClosedFileUtils::IsClosed(this) && |
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IsDriveThread()) |
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{ |
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// add to ClosedFiles container |
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__CACHE_PRINT1(_L("CLOSEDFILES: Adding %S\n"), &iFileCB->FileNameF() ); |
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TRAP(r, TClosedFileUtils::AddL(this, ETrue)); |
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// Acquire ownership of the CFileCB's file name |
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__ASSERT_DEBUG(iFileCB->iFileNameF, Fault(EClosingUnNamedFile)); |
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__ASSERT_DEBUG(iFileNameF == NULL, Fault(EFileNameAlreadyOwned)); |
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iFileNameF = iFileCB->iFileNameF; |
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iNameHash = iFileCB->iNameHash; |
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iFileCB->iFileNameF = NULL; |
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// remove pointer to owning CFileCB as this is called from CFileCB's destructor |
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iFileCB = NULL; |
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// Successfully moved file ! |
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if (r == KErrNone) |
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{ |
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// close the RFastLock object here to prevent OOM kernel tests from failing |
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iLock.Close(); |
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return; |
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} |
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} |
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iClosedTimer.Stop(); |
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377 |
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// if already closed, close for good. N.B. CFsObject::DoClose() will |
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// cause it to be removed from the ClosedFiles container |
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CFsDispatchObject::Close(); |
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} |
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382 |
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383 |
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CMountCB& CFileCache::Mount() const |
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385 |
{ |
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return *iMount; |
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} |
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388 |
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CFileCB* CFileCache::FileCB() |
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{ |
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return iFileCB; |
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392 |
} |
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393 |
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394 |
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395 |
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TInt CFileCache::SegmentSize() const |
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397 |
{ |
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398 |
return iCacheClient->SegmentSize(); |
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399 |
} |
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400 |
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401 |
TInt CFileCache::SegmentSizeLog2() const |
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402 |
{ |
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403 |
return iCacheClient->SegmentSizeLog2(); |
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} |
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405 |
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TInt64 CFileCache::SegmentSizeMask() const |
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407 |
{ |
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408 |
return iCacheClient->SegmentSizeMask(); |
|
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} |
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410 |
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/** |
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412 |
Sets the cached file size |
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413 |
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@param aSize The size of the file. |
|
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*/ |
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416 |
void CFileCache::SetSize64(TInt64 aSize) |
|
417 |
{ |
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__e32_atomic_store_ord64(&iSize64, aSize); |
|
419 |
} |
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TDrive& CFileCache::Drive() const |
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{ |
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return *iDrive; |
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} |
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TUint32 CFileCache::NameHash() const |
|
427 |
{ |
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428 |
return(iNameHash); |
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} |
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430 |
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HBufC& CFileCache::FileNameF() const |
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432 |
{ |
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__ASSERT_DEBUG(iFileNameF, Fault(EClosedFileHasNoName)); |
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return(*iFileNameF); |
|
435 |
} |
|
436 |
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437 |
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438 |
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439 |
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TBool CFileCache::IsDriveThread() |
|
441 |
{ |
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442 |
return FsThreadManager::IsDriveThread(iDriveNum, EFalse); |
|
443 |
} |
|
444 |
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445 |
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446 |
void CFileCache::ResetReadAhead() |
|
447 |
{ |
|
448 |
// iSequentialReads = 0; |
|
449 |
iReadAheadLen = 0; |
|
450 |
iReadAheadPos = 0; |
|
451 |
} |
|
452 |
||
453 |
/** |
|
454 |
ReadAhead() - |
|
455 |
dispatches a new message to fill the read cache if |
|
456 |
(ReadAheadPos - ShareReadPos) <= (ReadAheadLen) |
|
457 |
||
458 |
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX |
|
459 |
^ ^ |
|
460 |
|----- ReadAheadLen -----------------> |
|
461 |
| | |
|
462 |
ShareReadPos ReadAheadPos |
|
463 |
||
464 |
Every successful read-ahead doubles ReadAheadLen until it reaches the maximum |
|
465 |
(KDefaultFileCacheMaxReadAheadLen). |
|
466 |
*/ |
|
467 |
void CFileCache::ReadAhead(CFsMessageRequest& aMsgRequest, TUint aMode) |
|
468 |
{ |
|
469 |
if (!(aMode & EFileReadAheadOn) || |
|
470 |
(iSequentialReads < KMinSequentialReadsBeforeReadAhead) || |
|
471 |
iMaxReadAheadLen == 0) |
|
472 |
return; |
|
473 |
||
474 |
||
475 |
TInt segmentSize = SegmentSize(); |
|
476 |
TInt64 segmentSizeMask = SegmentSizeMask(); |
|
477 |
||
478 |
// if the read-ahead pos has been reset to zero, then the read-ahead |
|
479 |
// position and length must be re-calculated |
|
480 |
||
481 |
TBool resetting = (iReadAheadPos == 0)?(TBool)ETrue:(TBool)EFalse; |
|
482 |
if (resetting) |
|
483 |
{ |
|
484 |
iReadAheadPos = (iLastReadPos + segmentSize - 1) & segmentSizeMask; |
|
485 |
||
486 |
// ensure read ahead len at least as big as last read |
|
487 |
iReadAheadLen = Max(iReadAheadLen, iLastReadLen); |
|
488 |
||
489 |
// round up to a segment size |
|
490 |
iReadAheadLen = (iReadAheadLen + segmentSize - 1) & (TInt) segmentSizeMask; |
|
491 |
||
492 |
// ensure read ahead len at least as big as 1 segments |
|
493 |
iReadAheadLen = Max(iReadAheadLen, segmentSize); |
|
494 |
||
495 |
// ensure read ahead len not greater than the maximum read ahead len |
|
496 |
iReadAheadLen = Min(iReadAheadLen, iMaxReadAheadLen); |
|
497 |
||
498 |
iReadAheadRequest = NULL; |
|
499 |
} |
|
500 |
||
501 |
TInt bytesBuffered = (TInt) (iReadAheadPos - iLastReadPos); |
|
502 |
TInt bytesNotBuffered = iMaxReadAheadLen - bytesBuffered; |
|
503 |
||
504 |
||
505 |
// if read-ahead buffer len > current read-ahead len OR |
|
506 |
// read-ahead buffer is more than half full, do nothing |
|
507 |
if ((iReadAheadRequest) || |
|
508 |
(bytesBuffered > iReadAheadLen) || |
|
509 |
(bytesBuffered > (iMaxReadAheadLen>>1)) || |
|
510 |
(iReadAheadPos >= iSize64)) |
|
511 |
{ |
|
512 |
return; |
|
513 |
} |
|
514 |
||
515 |
// double the read-ahead length - unless this is the first |
|
516 |
if (!resetting) |
|
517 |
iReadAheadLen<<= 1; |
|
518 |
||
519 |
// ensure read ahead len not greater than the free space available in buffer |
|
520 |
iReadAheadLen = Min(iReadAheadLen, bytesNotBuffered); |
|
521 |
||
522 |
// round up to a segment size |
|
523 |
iReadAheadLen = (iReadAheadLen + segmentSize - 1) & (TInt) segmentSizeMask; |
|
524 |
||
525 |
#if defined (_DEBUG_READ_AHEAD) |
|
526 |
TInt64 oldReadAheadPos = iReadAheadPos; |
|
527 |
#endif |
|
528 |
||
529 |
DoReadAhead(aMsgRequest, aMode); |
|
530 |
||
531 |
||
532 |
// RDebug::Print(_L("Buffered: old %d new %d"), bytesBuffered, (iReadAheadPos == 0)?bytesBuffered:iReadAheadPos - iLastReadPos); |
|
533 |
||
534 |
#if defined (_DEBUG_READ_AHEAD) |
|
535 |
RDebug::Print(_L("Buffered: old %d new %d iLastReadPos %d ReadAheadPos old %d new %d iReadAheadLen %d"), |
|
536 |
bytesBuffered, |
|
537 |
(TInt) ((iReadAheadPos == 0)?bytesBuffered:iReadAheadPos - iLastReadPos), |
|
538 |
I64LOW(iLastReadPos), |
|
539 |
I64LOW(oldReadAheadPos), |
|
540 |
I64LOW(iReadAheadPos), |
|
541 |
iReadAheadLen); |
|
542 |
#endif // (_DEBUG_READ_AHEAD) |
|
543 |
||
544 |
||
545 |
return; |
|
546 |
} |
|
547 |
||
548 |
||
549 |
void CFileCache::DoReadAhead(CFsMessageRequest& aMsgRequest, TUint aMode) |
|
550 |
{ |
|
551 |
||
552 |
||
553 |
if (iCacheClient->FindSegment(iReadAheadPos) != NULL) |
|
554 |
{ |
|
555 |
// if read ahead pos is already cached, then synchronous reads have caught up, |
|
556 |
// so reset read ahead pos. |
|
557 |
#if defined (_DEBUG_READ_AHEAD) |
|
558 |
RDebug::Print(_L("ReadAhead: pos %d already cached"), I64LOW(iReadAheadPos)); |
|
559 |
#endif |
|
560 |
iReadAheadPos = 0; |
|
561 |
return; |
|
562 |
} |
|
563 |
||
564 |
||
565 |
CFsClientMessageRequest* newRequest = NULL; |
|
566 |
TInt r = AllocateRequest(newRequest, EFalse, aMsgRequest.Session()); |
|
567 |
if (r != KErrNone) |
|
568 |
return; |
|
569 |
||
570 |
r = newRequest->PushOperation( |
|
571 |
iReadAheadPos, |
|
572 |
iReadAheadLen, |
|
573 |
(TUint8*) NULL, |
|
574 |
0, // aOffset |
|
575 |
NULL); // aCallback |
|
576 |
if (r != KErrNone) |
|
577 |
{ |
|
578 |
newRequest->Free(); |
|
579 |
newRequest = NULL; |
|
580 |
return; |
|
581 |
} |
|
582 |
||
583 |
__CACHE_PRINT2(_L("TFsFileRead: ReadAhead pos %ld len %d"), newRequest->CurrentOperation().iReadWriteArgs.iPos, newRequest->CurrentOperation().iReadWriteArgs.iTotalLength); |
|
584 |
||
585 |
// RDebug::Print(_L("ReadH:\tpos %d\tlen %d"), I64LOW(newRequest->CurrentOperation().iReadWriteArgs.iPos), newRequest->CurrentOperation().iReadWriteArgs.iTotalLength); |
|
586 |
||
587 |
r = ReadBuffered(*newRequest, aMode); |
|
588 |
if (r != CFsRequest::EReqActionContinue) |
|
589 |
{ |
|
590 |
// if read ahead pos is already cached, then synchronous reads have caught up, |
|
591 |
// so reset read ahead pos. |
|
592 |
if (r == CFsRequest::EReqActionComplete) |
|
593 |
{ |
|
594 |
#if defined (_DEBUG_READ_AHEAD) |
|
595 |
RDebug::Print(_L("ReadAhead pos %d ALREADY DONE !!!"), I64LOW(iReadAheadPos)); |
|
596 |
#endif |
|
597 |
iReadAheadPos = 0; |
|
598 |
} |
|
599 |
||
600 |
newRequest->PopOperation(); |
|
601 |
newRequest->Free(); |
|
602 |
newRequest = NULL; |
|
603 |
return; |
|
604 |
} |
|
605 |
||
606 |
iReadAheadPos = iReadAheadPos + iReadAheadLen; |
|
607 |
iReadAheadRequest = newRequest; |
|
608 |
||
609 |
#if defined (_DEBUG_READ_AHEAD) |
|
610 |
RDebug::Print(_L("Dispatching ReadAhead with %s priority"), iFileCacheReadAsync?_S16("HIGH"):_S16("LOW")); |
|
611 |
#endif |
|
612 |
// If if media driver reads are synchronous (i.e. not interrupt driven) dispatch read-ahead |
|
613 |
// with low priority so that it doesn't prevent client thread from running |
|
614 |
newRequest->Dispatch( |
|
615 |
EFalse, // don't init |
|
616 |
iFileCacheReadAsync?(TBool)EFalse:(TBool)ETrue, |
|
617 |
EFalse); // dispatch to back |
|
618 |
} |
|
619 |
||
620 |
TInt CFileCache::CompleteRead(CFsRequest* aRequest) |
|
621 |
{ |
|
622 |
CFsMessageRequest& msgRequest = *(CFsMessageRequest*) aRequest; |
|
623 |
||
624 |
__ASSERT_DEBUG(msgRequest.CurrentOperationPtr() != NULL, Fault(ECacheBadOperationIndex)); |
|
625 |
||
626 |
CFileShare* share; |
|
627 |
CFileCB* file; |
|
628 |
GetFileFromScratch(aRequest, share, file); |
|
629 |
CFileCache* fileCache = file->FileCache(); |
|
630 |
||
631 |
__ASSERT_DEBUG(fileCache != NULL, Fault(ENoFileCache)); |
|
632 |
#ifdef _DEBUG |
|
633 |
TInt cancelling = (msgRequest.LastError() == KErrCancel)?(TBool)ETrue:(TBool)EFalse; |
|
634 |
#endif |
|
635 |
||
636 |
TUint mode = share?share->iMode : EFileReadBuffered; |
|
637 |
TInt r = fileCache->ReadBuffered(msgRequest, mode); |
|
638 |
||
639 |
// if this request has been cancelled we mustn't dispatch it again - |
|
640 |
// we still need to call state machine however so that any locked segments can be unlocked |
|
641 |
||
642 |
||
643 |
TInt lastError = msgRequest.LastError(); |
|
644 |
||
645 |
#ifdef _DEBUG |
|
646 |
__ASSERT_DEBUG(!cancelling || msgRequest.LastError() == KErrCancel, Fault(ERequestUncancelled)); |
|
647 |
#endif |
|
648 |
||
649 |
if (lastError == KErrCancel) |
|
650 |
r = CFsRequest::EReqActionComplete; |
|
651 |
||
652 |
return r; |
|
653 |
} |
|
654 |
||
655 |
/** |
|
656 |
ReadBuffered - attempts to read from cache. |
|
657 |
Called from TFsFileRead::Initialise() and CFileCache::CompleteRead() |
|
658 |
||
659 |
@return CFsRequest::EReqActionComplete if request entirely satisfied |
|
660 |
CFsRequest::EReqActionContinue if request not yet complete. |
|
661 |
Results in transition from : |
|
662 |
TFsFileRead::PostInitialise() to TFsFileRead::DoRequestL() or |
|
663 |
CFileCache::CompleteRead() to TFsFileRead::DoRequestL() |
|
664 |
CFsRequest::EReqActionBusy if filecache is "busy" |
|
665 |
*/ |
|
666 |
TInt CFileCache::ReadBuffered(CFsMessageRequest& aMsgRequest, TUint aMode) |
|
667 |
{ |
|
668 |
iLock.Wait(); |
|
669 |
||
670 |
CFsClientMessageRequest* newRequest = NULL; |
|
671 |
||
672 |
__CACHE_PRINT2(_L("CFileCache::ReadBuffered() pos %d, len %d"), I64LOW(aMsgRequest.CurrentOperation().iReadWriteArgs.iPos), aMsgRequest.CurrentOperation().iReadWriteArgs.iTotalLength); |
|
673 |
TInt r = DoReadBuffered(aMsgRequest, aMode, newRequest); |
|
674 |
||
675 |
iLock.Signal(); |
|
676 |
||
677 |
if (newRequest) |
|
678 |
newRequest->Dispatch(); |
|
679 |
||
680 |
return r; |
|
681 |
} |
|
682 |
||
683 |
||
684 |
void CFileCache::UpdateSharePosition(CFsMessageRequest& aMsgRequest, TMsgOperation& aCurrentOperation) |
|
685 |
{ |
|
686 |
// update the file share's position if this request came from client |
|
687 |
if (aCurrentOperation.iClientRequest) |
|
688 |
{ |
|
689 |
CFileShare* share = (CFileShare*)aMsgRequest.ScratchValue(); |
|
690 |
if (aMsgRequest.LastError() == KErrNone) |
|
691 |
{ |
|
692 |
__e32_atomic_store_ord64(&share->iPos, aCurrentOperation.iReadWriteArgs.iPos); |
|
693 |
} |
|
694 |
} |
|
695 |
} |
|
696 |
||
697 |
TInt CFileCache::DoReadBuffered(CFsMessageRequest& aMsgRequest, TUint aMode, CFsClientMessageRequest*& aNewRequest) |
|
698 |
{ |
|
699 |
enum states |
|
700 |
{ |
|
701 |
EStBegin=0, |
|
702 |
EStReadFromCache, |
|
703 |
EStReadFromDiskComplete, |
|
704 |
EStCopyToClient, |
|
705 |
EStReStart, |
|
706 |
EStEnd |
|
707 |
}; |
|
708 |
||
709 |
||
710 |
TInt retCode = CFsRequest::EReqActionComplete; |
|
711 |
TInt& lastError = aMsgRequest.LastError(); |
|
712 |
TBool driveThread = IsDriveThread(); |
|
713 |
||
714 |
// temp storage for transition between EStReadFromCache / EStReadFromDiskComplete and EStCopyToClient |
|
715 |
TInt readLen = 0; |
|
716 |
TUint8* addr = NULL; |
|
717 |
TInt64 segmentStartPos = 0; |
|
718 |
||
719 |
TInt segmentSize = SegmentSize(); |
|
720 |
TInt segmentSizeLog2 = SegmentSizeLog2(); |
|
721 |
TInt64 segmentSizeMask = SegmentSizeMask(); |
|
722 |
||
723 |
for(;;) |
|
724 |
{ |
|
725 |
TMsgOperation* currentOperation = &aMsgRequest.CurrentOperation(); |
|
726 |
TInt64& currentPos = currentOperation->iReadWriteArgs.iPos; |
|
727 |
TInt& totalLen = currentOperation->iReadWriteArgs.iTotalLength; |
|
728 |
TInt& currentOffset = currentOperation->iReadWriteArgs.iOffset; |
|
729 |
TBool readAhead = (currentOperation->iReadWriteArgs.iData == NULL)?(TBool)ETrue:(TBool)EFalse; |
|
730 |
||
731 |
switch(currentOperation->iState) |
|
732 |
{ |
|
733 |
case EStBegin: |
|
734 |
||
735 |
||
736 |
// if EFileReadDirectIO, flush write cache and read direct from disk |
|
737 |
if (!(aMode & EFileReadBuffered)) |
|
738 |
{ |
|
739 |
iLock.Signal(); |
|
740 |
TInt r = FlushDirty(&aMsgRequest); |
|
741 |
iLock.Wait(); |
|
742 |
if (r == CFsRequest::EReqActionBusy) |
|
743 |
return CFsRequest::EReqActionBusy; |
|
744 |
return CFsRequest::EReqActionContinue; // read uncached |
|
745 |
} |
|
746 |
||
747 |
if (currentPos > iSize64) |
|
748 |
currentPos = iSize64; |
|
749 |
||
750 |
currentOperation->iState = EStReadFromCache; |
|
751 |
||
752 |
// count the number of sequential reads for read-ahead |
|
753 |
if (currentOperation->iClientRequest) |
|
754 |
{ |
|
755 |
if (currentPos == iLastReadPos) |
|
756 |
{ |
|
757 |
iSequentialReads++; |
|
758 |
} |
|
759 |
else |
|
760 |
{ |
|
761 |
iSequentialReads = 0; |
|
762 |
ResetReadAhead(); |
|
763 |
} |
|
764 |
iLastReadPos = currentPos + totalLen; |
|
765 |
iLastReadLen = totalLen; |
|
766 |
} |
|
767 |
||
768 |
||
769 |
// fall into... |
|
770 |
||
771 |
case EStReadFromCache: |
|
772 |
{ |
|
773 |
// reading past end of file ? |
|
774 |
if (currentPos + totalLen > iSize64) |
|
775 |
totalLen = (TInt) (iSize64 - currentPos); |
|
776 |
||
777 |
||
778 |
if (totalLen == 0 || lastError != KErrNone) |
|
779 |
{ |
|
780 |
currentOperation->iState = EStEnd; |
|
781 |
break; |
|
782 |
} |
|
783 |
||
784 |
segmentStartPos = currentPos & segmentSizeMask; |
|
785 |
||
786 |
||
787 |
TInt64 endPos = currentPos + totalLen; |
|
788 |
TUint maxLenToRead = (TUint)Min((TInt64)(iCacheClient->CacheLineSize()), (endPos - segmentStartPos)); |
|
789 |
TInt maxSegments = (maxLenToRead + segmentSize - 1) >> segmentSizeLog2; |
|
790 |
||
791 |
||
792 |
TInt segmentCount = maxSegments; |
|
793 |
TInt filledSegmentCount; |
|
794 |
TInt lockError; |
|
795 |
addr = iCacheClient->FindAndLockSegments(segmentStartPos, segmentCount, filledSegmentCount, lockError, EFalse); |
|
796 |
||
797 |
||
798 |
#if defined (_DEBUG_READ_AHEAD) |
|
799 |
if (addr && readAhead) |
|
800 |
RDebug::Print(_L("READAHEAD CACHELINE ALREADY EXISTS POS %d"), I64LOW(segmentStartPos)); |
|
801 |
#endif |
|
802 |
||
803 |
// if cacheline contains filled and empty segments, deal with these seperately |
|
804 |
// to simplify the code..... |
|
805 |
if (filledSegmentCount > 0 && segmentCount > filledSegmentCount) |
|
806 |
{ |
|
807 |
segmentCount = Min(segmentCount, filledSegmentCount); |
|
808 |
} |
|
809 |
||
810 |
if (lockError == KErrInUse) |
|
811 |
{ |
|
812 |
// cacheline in use (by other thread): |
|
813 |
// if this is a read-ahead, abandon it |
|
814 |
// otherwise re-post the request |
|
815 |
if (readAhead) |
|
816 |
{ |
|
817 |
totalLen = 0; |
|
818 |
retCode = CFsRequest::EReqActionComplete; |
|
819 |
currentOperation->iState = EStEnd; |
|
820 |
} |
|
821 |
else |
|
822 |
{ |
|
823 |
#if defined (_DEBUG_READ_AHEAD) |
|
824 |
RDebug::Print(_L("READC CACHELINE BUSY POS %d"), I64LOW(segmentStartPos)); |
|
825 |
#endif |
|
826 |
||
827 |
return CFsRequest::EReqActionBusy; |
|
828 |
} |
|
829 |
break; |
|
830 |
} |
|
831 |
||
832 |
// if not found, try to allocate as many contiguous segments |
|
833 |
// as possible so that the number of reads issued to the media |
|
834 |
// driver is kept to a minumum |
|
835 |
||
836 |
if (addr == NULL) // not found ? |
|
837 |
{ |
|
838 |
// if read len > size of the cache, don't read excess |
|
839 |
// through the cache as this is wasteful |
|
840 |
if (totalLen > iCacheSize) |
|
841 |
{ |
|
842 |
TInt len = totalLen - iCacheSize; |
|
843 |
TInt r = aMsgRequest.PushOperation( |
|
844 |
currentPos, len, |
|
845 |
(TDesC8*) currentOperation->iReadWriteArgs.iData, currentOffset, |
|
846 |
CompleteRead, |
|
847 |
EStReadFromCache); |
|
848 |
if (r != KErrNone) |
|
849 |
{ |
|
850 |
currentOperation->iState = EStReStart; |
|
851 |
break; |
|
852 |
} |
|
853 |
||
854 |
currentOffset+= len; |
|
855 |
currentPos+= len; |
|
856 |
totalLen-= len; |
|
857 |
return CFsRequest::EReqActionContinue; |
|
858 |
} |
|
859 |
||
860 |
// if position not cached postpone Initialise() to drive thread |
|
861 |
// as there may be a read ahead already in the queue |
|
862 |
||
863 |
if (!driveThread && !readAhead) |
|
864 |
{ |
|
865 |
#if defined (_DEBUG_READ_AHEAD) |
|
866 |
RDebug::Print(_L("*** POSTING READ TO DRIVE THREAD POS %d ***"), I64LOW(segmentStartPos)); |
|
867 |
#endif |
|
868 |
return CFsRequest::EReqActionBusy; |
|
869 |
} |
|
870 |
||
871 |
segmentCount = maxSegments; |
|
872 |
addr = iCacheClient->AllocateAndLockSegments(segmentStartPos, segmentCount, EFalse, !readAhead); |
|
873 |
if (addr == NULL) |
|
874 |
{ |
|
875 |
__CACHE_PRINT(_L("AllocateSegment failed")); |
|
876 |
currentOperation->iState = EStReStart; |
|
877 |
break; |
|
878 |
} |
|
879 |
} |
|
880 |
||
881 |
||
882 |
readLen = segmentCount << segmentSizeLog2; |
|
883 |
__ASSERT_DEBUG(iSize64 > segmentStartPos, Fault(EPosBeyondSize)); |
|
884 |
readLen = (TInt)Min((TInt64)readLen, (iSize64 - segmentStartPos)); |
|
885 |
||
886 |
if (iCacheClient->SegmentEmpty(segmentStartPos)) |
|
887 |
{ |
|
888 |
// store readLen & addr in scratch area |
|
889 |
currentOperation->iScratchValue0 = addr; |
|
890 |
currentOperation->iScratchValue1 = (TAny*) readLen; |
|
891 |
||
892 |
// read into cache segment(s) |
|
893 |
__CACHE_PRINT2(_L("CACHEFILE: read pos %ld, readLen %d"), segmentStartPos, readLen); |
|
894 |
TInt r = aMsgRequest.PushOperation( |
|
895 |
segmentStartPos, readLen, addr, 0, |
|
896 |
CompleteRead, |
|
897 |
EStReadFromDiskComplete); |
|
898 |
if (r != KErrNone) |
|
899 |
{ |
|
900 |
iCacheClient->UnlockSegments(segmentStartPos); |
|
901 |
currentOperation->iState = EStReStart; |
|
902 |
break; |
|
903 |
} |
|
904 |
||
905 |
return CFsRequest::EReqActionContinue; |
|
906 |
} |
|
907 |
else |
|
908 |
{ |
|
909 |
currentOperation->iState = EStCopyToClient; |
|
910 |
} |
|
911 |
} |
|
912 |
// fall into ... |
|
913 |
||
914 |
case EStCopyToClient: |
|
915 |
{ |
|
916 |
TInt segmentsLocked = (readLen + segmentSize - 1) >> segmentSizeLog2; |
|
917 |
||
918 |
if (lastError == KErrNone) |
|
919 |
{ |
|
920 |
// copy to user buffer |
|
921 |
TInt offset = iCacheClient->CacheOffset(currentPos); // offset into segment |
|
922 |
TInt len = Min(readLen - offset, totalLen); |
|
923 |
||
924 |
// if addr is NULL then this is a read ahead request |
|
925 |
if (currentOperation->iReadWriteArgs.iData != NULL) |
|
926 |
{ |
|
927 |
if (currentOperation->iClientRequest) |
|
928 |
{ |
|
929 |
__ASSERT_DEBUG (aMsgRequest.Message().Handle() != NULL, Fault(EMsgAlreadyCompleted)); |
|
930 |
TPtrC8 ptr(addr+offset, len); |
|
931 |
lastError = aMsgRequest.Write(0, ptr, currentOffset); |
|
932 |
} |
|
933 |
else |
|
934 |
{ |
|
935 |
memcpy(((TUint8*) currentOperation->iReadWriteArgs.iData) + currentOffset, addr+offset, len); |
|
936 |
} |
|
937 |
} |
|
938 |
else |
|
939 |
{ |
|
940 |
iReadAheadRequest = NULL; |
|
941 |
} |
|
942 |
||
943 |
currentOffset+= len; |
|
944 |
currentPos+= len; |
|
945 |
totalLen-= len; |
|
946 |
} |
|
947 |
||
948 |
if (lastError == KErrNone) |
|
949 |
iCacheClient->MarkSegmentsAsFilled(segmentStartPos, segmentsLocked); |
|
950 |
iCacheClient->UnlockSegments(segmentStartPos); |
|
951 |
||
952 |
if (lastError != KErrNone) |
|
953 |
{ |
|
954 |
retCode = CFsRequest::EReqActionComplete; |
|
955 |
currentOperation->iState = EStEnd; |
|
956 |
break; |
|
957 |
} |
|
958 |
||
959 |
if (totalLen > 0 && lastError == KErrNone) |
|
960 |
{ |
|
961 |
currentOperation->iState = EStReadFromCache; |
|
962 |
break; |
|
963 |
} |
|
964 |
currentOperation->iState = EStEnd; |
|
965 |
} |
|
966 |
// fall into ... |
|
967 |
||
968 |
||
969 |
case EStEnd: |
|
970 |
// update the file share's position if this request came from client |
|
971 |
UpdateSharePosition(aMsgRequest, *currentOperation); |
|
972 |
return retCode; |
|
973 |
||
974 |
case EStReadFromDiskComplete: |
|
975 |
{ |
|
976 |
// restore readLen etc from scratch area |
|
977 |
segmentStartPos = currentPos & segmentSizeMask; |
|
978 |
addr = (TUint8*) currentOperation->iScratchValue0; |
|
979 |
readLen = (TInt) currentOperation->iScratchValue1; |
|
980 |
||
981 |
aMsgRequest.CurrentOperation().iState = EStCopyToClient; |
|
982 |
} |
|
983 |
break; |
|
984 |
||
985 |
case EStReStart: |
|
986 |
||
987 |
// ignore the failure if this is a read-ahead |
|
988 |
if (readAhead) |
|
989 |
{ |
|
990 |
totalLen = 0; |
|
991 |
retCode = CFsRequest::EReqActionComplete; |
|
992 |
currentOperation->iState = EStEnd; |
|
993 |
break; |
|
994 |
} |
|
995 |
||
996 |
// We need to flush all dirty data to disk in case this read overlaps |
|
997 |
// with any dirty data already in the file cache |
|
998 |
if (aMode & EFileWriteBuffered) |
|
999 |
{ |
|
201
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152
diff
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|
1000 |
TInt r = DoFlushDirty(aNewRequest, &aMsgRequest, EFlushAll); |
0 | 1001 |
if (r == CFsRequest::EReqActionBusy || r != CFsRequest::EReqActionComplete) |
1002 |
return r; |
|
1003 |
} |
|
1004 |
||
1005 |
retCode = CFsRequest::EReqActionContinue; // read uncached |
|
1006 |
currentOperation->iState = EStEnd; |
|
1007 |
||
1008 |
/* |
|
1009 |
We're now going to by-pass the file cache. |
|
1010 |
If we've already written something to the client's buffer then, in the flexible |
|
1011 |
memory model, the KDesWrittenShift bit will be set and so the descriptor length will |
|
1012 |
updated in RMessageK::CallbackFunc() when the client thread runs. This (shorter) |
|
1013 |
length will overwrite the descriptor length written by the local media subsystem. |
|
1014 |
To get round this problem, we set the descriptor length artificially by writing a |
|
1015 |
zero-length descriptor at the end of the client's buffer. |
|
1016 |
*/ |
|
1017 |
if (currentOffset > 0 && currentOperation->iClientRequest) |
|
1018 |
{ |
|
1019 |
__ASSERT_DEBUG (aMsgRequest.Message().Handle() != NULL, Fault(EMsgAlreadyCompleted)); |
|
1020 |
TPtrC8 ptr(NULL, 0); |
|
1021 |
TInt r = aMsgRequest.Write(0, ptr, currentOffset+totalLen); |
|
1022 |
__CACHE_PRINT3(_L("CFileCache::DoReadBuffered() failed at pos %lx offset %x totalLen %x\n"), currentPos, currentOffset, totalLen); |
|
1023 |
__CACHE_PRINT2(_L("CFileCache::DoReadBuffered() writing zero bytes at offset %x r %d\n"), currentOffset + totalLen, r); |
|
1024 |
if (r != KErrNone) |
|
1025 |
retCode = r; |
|
1026 |
} |
|
1027 |
||
1028 |
aMsgRequest.ReStart(); |
|
1029 |
UpdateSharePosition(aMsgRequest, *currentOperation); |
|
1030 |
return retCode; |
|
1031 |
||
1032 |
||
1033 |
}; |
|
1034 |
} // for (;;) |
|
1035 |
||
1036 |
} |
|
1037 |
||
1038 |
||
1039 |
||
1040 |
/** |
|
1041 |
WriteBuffered - attempts to write to cache. |
|
1042 |
Called from TFsFileRead::Initialise and TFsFileRead::DoRequestL |
|
1043 |
||
1044 |
@return CFsRequest::EReqActionComplete if request entirely satisfied |
|
1045 |
CFsRequest::EReqActionContinue if request not yet complete |
|
1046 |
CFsRequest::EReqActionBusy if filecache is busy |
|
1047 |
*/ |
|
1048 |
TInt CFileCache::WriteBuffered(CFsMessageRequest& aMsgRequest, TUint aMode) |
|
1049 |
{ |
|
1050 |
iLock.Wait(); |
|
1051 |
||
1052 |
||
1053 |
CFsClientMessageRequest* newRequest = NULL; |
|
1054 |
||
1055 |
__CACHE_PRINT2(_L("CFileCache::WriteBuffered() pos %d, len %d"), I64LOW(aMsgRequest.CurrentOperation().iReadWriteArgs.iPos), aMsgRequest.CurrentOperation().iReadWriteArgs.iTotalLength); |
|
1056 |
TInt r = DoWriteBuffered(aMsgRequest, newRequest, aMode); |
|
1057 |
||
1058 |
iLock.Signal(); |
|
1059 |
||
1060 |
if (newRequest) |
|
1061 |
newRequest->Dispatch(); |
|
1062 |
||
1063 |
// completion ? |
|
1064 |
if (r == CFsRequest::EReqActionComplete) |
|
1065 |
{ |
|
1066 |
TMsgOperation& currentOperation = aMsgRequest.CurrentOperation(); |
|
1067 |
||
1068 |
__ASSERT_DEBUG(aMsgRequest.CurrentOperationPtr() != NULL, Fault(ECacheBadOperationIndex)); |
|
1069 |
||
1070 |
TFsFileWrite::CommonEnd(&aMsgRequest, r, iInitialSize, iSize64, currentOperation.iReadWriteArgs.iPos, EFalse); |
|
1071 |
} |
|
1072 |
||
1073 |
return r; |
|
1074 |
} |
|
1075 |
||
1076 |
||
1077 |
||
1078 |
||
1079 |
TInt CFileCache::CompleteWrite(CFsRequest* aRequest) |
|
1080 |
{ |
|
1081 |
CFsMessageRequest& msgRequest = *(CFsMessageRequest*) aRequest; |
|
1082 |
||
1083 |
CFileShare* share = (CFileShare*)aRequest->ScratchValue(); |
|
1084 |
CFileCB& file = share->File(); |
|
1085 |
CFileCache* fileCache = file.FileCache(); //&file; |
|
1086 |
__ASSERT_DEBUG(fileCache != NULL, Fault(ENoFileCache)); |
|
1087 |
||
1088 |
#ifdef _DEBUG |
|
1089 |
TInt cancelling = (msgRequest.LastError() == KErrCancel)?(TBool)ETrue:(TBool)EFalse; |
|
1090 |
#endif |
|
1091 |
||
1092 |
||
1093 |
TInt r = fileCache->WriteBuffered(msgRequest, share->iMode); |
|
1094 |
||
1095 |
#ifdef _DEBUG |
|
1096 |
__ASSERT_DEBUG(!cancelling || msgRequest.LastError() == KErrCancel, Fault(ERequestUncancelled)); |
|
1097 |
#endif |
|
1098 |
||
1099 |
// if this request has been cancelled we mustn't dispatch it again - |
|
1100 |
// we still need to call state machine however so that any locked segments can be unlocked |
|
1101 |
TInt lastError = msgRequest.LastError(); |
|
1102 |
if (lastError == KErrCancel) |
|
1103 |
r = CFsRequest::EReqActionComplete; |
|
1104 |
||
1105 |
return r; |
|
1106 |
} |
|
1107 |
||
1108 |
||
1109 |
||
1110 |
TInt CFileCache::DoWriteBuffered(CFsMessageRequest& aMsgRequest, CFsClientMessageRequest*& aNewRequest, TUint aMode) |
|
1111 |
||
1112 |
{ |
|
1113 |
enum states |
|
1114 |
{ |
|
1115 |
EStBegin=0, |
|
1116 |
EStWriteToCache, |
|
1117 |
EStReadFromDisk, |
|
1118 |
EStReadFromDiskComplete, |
|
1119 |
EStWriteToCacheComplete, |
|
1120 |
EStCopyFromClient, |
|
1121 |
EStReStart, |
|
1122 |
EStEnd, |
|
1123 |
EStWriteThrough |
|
1124 |
}; |
|
1125 |
||
1126 |
enum flags |
|
1127 |
{ |
|
1128 |
EReadFirstSegment = 0x01, |
|
1129 |
EReadLastSegment = 0x02 |
|
1130 |
}; |
|
1131 |
||
1132 |
TBool cachingWrites = (aMode & EFileWriteBuffered)?(TBool)ETrue:(TBool)EFalse; |
|
1133 |
TInt& lastError = aMsgRequest.LastError(); |
|
1134 |
TBool driveThread = IsDriveThread(); |
|
1135 |
TInt segmentSize = SegmentSize(); |
|
1136 |
TInt segmentSizeLog2 = SegmentSizeLog2(); |
|
1137 |
TInt64 segmentSizeMask = SegmentSizeMask(); |
|
1138 |
||
1139 |
// temp storage for transition between EStWriteToCache / EStWriteToCacheComplete and EStCopyFromClient |
|
1140 |
TInt segmentCount = 0; |
|
1141 |
TUint8* addr = NULL; |
|
1142 |
TInt64 firstSegmentStartPos = 0; |
|
1143 |
TInt64 readPos = 0; |
|
1144 |
TUint8* readAddr = NULL; |
|
1145 |
TInt readSegmentCount = 0; |
|
1146 |
||
1147 |
TInt readFlags = 0; |
|
1148 |
||
1149 |
for(;;) |
|
1150 |
{ |
|
1151 |
TMsgOperation* currentOperation = &aMsgRequest.CurrentOperation(); |
|
1152 |
TInt retCode = CFsRequest::EReqActionComplete; |
|
1153 |
||
1154 |
TInt64& currentPos = currentOperation->iReadWriteArgs.iPos; |
|
1155 |
TInt& totalLen = currentOperation->iReadWriteArgs.iTotalLength; |
|
1156 |
TInt& currentOffset = currentOperation->iReadWriteArgs.iOffset; |
|
1157 |
switch(currentOperation->iState) |
|
1158 |
{ |
|
1159 |
case EStBegin: |
|
1160 |
{ |
|
1161 |
// Report background flush errors back to client |
|
1162 |
CFileShare* share = (CFileShare*) aMsgRequest.ScratchValue(); |
|
1163 |
if (share->iFlushError != KErrNone) |
|
1164 |
{ |
|
1165 |
TInt r = share->iFlushError; |
|
1166 |
share->iFlushError = KErrNone; |
|
1167 |
return r; |
|
1168 |
} |
|
1169 |
||
1170 |
if (currentPos > iSize64) |
|
1171 |
currentPos = iSize64; |
|
1172 |
iInitialSize = iSize64; |
|
1173 |
||
201
43365a9b78a3
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1174 |
|
43365a9b78a3
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parents:
152
diff
changeset
|
1175 |
#ifdef DOUBLE_BUFFERED_WRITING |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1176 |
// count the number of sequential write-appends |
43365a9b78a3
Revision: 201027
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parents:
152
diff
changeset
|
1177 |
if (currentOperation->iClientRequest) |
43365a9b78a3
Revision: 201027
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parents:
152
diff
changeset
|
1178 |
{ |
43365a9b78a3
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parents:
152
diff
changeset
|
1179 |
if (currentPos == iSize64) |
43365a9b78a3
Revision: 201027
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parents:
152
diff
changeset
|
1180 |
iSequentialAppends++; |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1181 |
else |
43365a9b78a3
Revision: 201027
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parents:
152
diff
changeset
|
1182 |
iSequentialAppends = 0; |
43365a9b78a3
Revision: 201027
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parents:
152
diff
changeset
|
1183 |
} |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1184 |
#endif // DOUBLE_BUFFERED_WRITING |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1185 |
|
0 | 1186 |
// if EFileWriteDirectIO OR |
1187 |
// (caching writes and requested write len > size of the cache), |
|
1188 |
// flush the write cache |
|
1189 |
if ((aMode & EFileWriteBuffered) == 0 || |
|
1190 |
(cachingWrites && totalLen > iCacheSize)) |
|
1191 |
{ |
|
201
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1192 |
TInt r = DoFlushDirty(aNewRequest, &aMsgRequest, EFlushAll); |
0 | 1193 |
if (r == CFsRequest::EReqActionBusy || r != CFsRequest::EReqActionComplete) |
1194 |
return r; |
|
1195 |
} |
|
1196 |
// if EFileWriteDirectIO then overwrite any non-dirty data and |
|
1197 |
// write direct to disk.... |
|
1198 |
||
1199 |
// if caching writes and requested write len > size of the cache, |
|
1200 |
// don't write excess through the cache as this is wasteful |
|
1201 |
if (cachingWrites && totalLen > iCacheSize) |
|
1202 |
{ |
|
1203 |
// Destroy ALL cached data (dirty and non-dirty) to ensure |
|
1204 |
// cache is consistent with data written to disk |
|
1205 |
iCacheClient->Purge(ETrue); |
|
1206 |
||
1207 |
TInt len = totalLen - iCacheSize; |
|
1208 |
TInt r = aMsgRequest.PushOperation( |
|
1209 |
currentPos, len, |
|
1210 |
(TDesC8*) currentOperation->iReadWriteArgs.iData, currentOffset, |
|
1211 |
CompleteWrite, |
|
1212 |
EStWriteToCache); |
|
1213 |
if (r != KErrNone) |
|
1214 |
{ |
|
1215 |
currentOperation->iState = EStReStart; |
|
1216 |
break; |
|
1217 |
} |
|
1218 |
||
1219 |
currentOffset+= len; |
|
1220 |
currentPos+= len; |
|
1221 |
totalLen-= len; |
|
1222 |
return CFsRequest::EReqActionContinue; |
|
1223 |
} |
|
1224 |
||
1225 |
currentOperation->iState = EStWriteToCache; |
|
1226 |
} |
|
1227 |
break; |
|
1228 |
||
1229 |
case EStWriteToCache: |
|
1230 |
__ASSERT_DEBUG(aMsgRequest.CurrentOperationPtr() != NULL, Fault(ECacheBadOperationIndex)); |
|
1231 |
{ |
|
1232 |
// NB we must carry on if we get an error to ensure cache is consistent with disk |
|
1233 |
if (totalLen == 0 || lastError == KErrCancel) |
|
1234 |
{ |
|
1235 |
currentOperation->iState = EStWriteToCacheComplete; |
|
1236 |
break; |
|
1237 |
} |
|
1238 |
||
1239 |
firstSegmentStartPos = currentPos & segmentSizeMask; |
|
1240 |
TInt64 endPos = currentPos + totalLen; |
|
1241 |
||
1242 |
// Find the maximum number of contiguous segments we need to lock |
|
1243 |
// in this cacheline - when we unlock these will be marked as filled |
|
1244 |
const TInt64 dataRange = Min((TInt64)iCacheSize, (endPos + segmentSize - 1 - firstSegmentStartPos)); |
|
1245 |
TInt maxSegmentCount = (TInt)(dataRange >> segmentSizeLog2); |
|
1246 |
||
1247 |
segmentCount = maxSegmentCount; |
|
1248 |
||
1249 |
TInt lockError; |
|
1250 |
TInt filledSegmentCount; |
|
1251 |
addr = iCacheClient->FindAndLockSegments(firstSegmentStartPos, segmentCount, filledSegmentCount, lockError, cachingWrites); |
|
1252 |
||
1253 |
if (lockError == KErrInUse) |
|
1254 |
return CFsRequest::EReqActionBusy; |
|
1255 |
||
1256 |
#ifdef LAZY_WRITE |
|
1257 |
if (cachingWrites && addr == NULL && lastError == KErrNone && iCacheClient->TooManyLockedSegments()) |
|
1258 |
{ |
|
1259 |
// Flush a single dirty cacheline (if there is one for this file) |
|
1260 |
// or all dirty data on this drive (if there is any). |
|
1261 |
// If there's nothing to flush then the dirty (locked) data |
|
1262 |
// must belong to another drive, so there's not much we can do |
|
1263 |
// but write through |
|
201
43365a9b78a3
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1264 |
TInt r = DoFlushDirty(aNewRequest, &aMsgRequest, EFlushSingle); |
0 | 1265 |
if (r == CFsRequest::EReqActionBusy) |
1266 |
return CFsRequest::EReqActionBusy; |
|
1267 |
if (r != KErrInUse) |
|
1268 |
{ |
|
1269 |
// Need to switch to drive thread to flush all data on this drive |
|
1270 |
if (!driveThread) |
|
1271 |
return CFsRequest::EReqActionBusy; |
|
1272 |
iLock.Signal(); |
|
1273 |
TInt r = iDrive->FlushCachedFileInfo(); |
|
1274 |
iLock.Wait(); |
|
1275 |
if (r == CFsRequest::EReqActionBusy) |
|
1276 |
return CFsRequest::EReqActionBusy; |
|
1277 |
||
1278 |
lastError = KErrNoMemory; // write through |
|
1279 |
} |
|
1280 |
} |
|
1281 |
#else |
|
1282 |
// flush cache before allocating a new cacheline |
|
1283 |
if (cachingWrites && addr == NULL && lastError == KErrNone) |
|
1284 |
{ |
|
1285 |
// if no segment available, flush a single dirty cacheline |
|
1286 |
// or wait if already flushing |
|
1287 |
if (iFlushBusy) |
|
1288 |
return CFsRequest::EReqActionBusy; |
|
201
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Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1289 |
TInt r = DoFlushDirty(aNewRequest, &aMsgRequest, EFlushSingle); |
0 | 1290 |
if (r != CFsRequest::EReqActionBusy && r != CFsRequest::EReqActionComplete) |
1291 |
lastError = r; |
|
1292 |
} |
|
1293 |
#endif |
|
201
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parents:
152
diff
changeset
|
1294 |
#ifdef DOUBLE_BUFFERED_WRITING |
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Revision: 201027
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parents:
152
diff
changeset
|
1295 |
if (cachingWrites && lastError == KErrNone && |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1296 |
iSequentialAppends >= KMinSequentialAppendsBeforeFlush && iCacheClient->LockedSegmentsHalfUsed()) |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1297 |
{ |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1298 |
DoFlushDirty(aNewRequest, &aMsgRequest, EFlushHalf); |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1299 |
} |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1300 |
#endif |
0 | 1301 |
// if no cacheline found & write caching is enabled, allocate a new cacheline |
1302 |
if (cachingWrites && addr == NULL && lastError == KErrNone) |
|
1303 |
{ |
|
1304 |
// try to allocate up to write cache size - this may not |
|
1305 |
// be possible if a segment in the range is already cached |
|
1306 |
segmentCount = maxSegmentCount; |
|
1307 |
addr = iCacheClient->AllocateAndLockSegments(currentPos, segmentCount, cachingWrites, ETrue); |
|
1308 |
||
1309 |
// continue if alloc failed |
|
1310 |
if (addr == NULL) |
|
1311 |
lastError = KErrNoMemory; |
|
1312 |
||
1313 |
} |
|
1314 |
||
1315 |
if (addr == NULL) |
|
1316 |
{ |
|
1317 |
if (cachingWrites && lastError == KErrNone) |
|
1318 |
lastError = KErrNoMemory; |
|
1319 |
segmentCount = 1; |
|
1320 |
currentOperation->iState = EStCopyFromClient; |
|
1321 |
break; |
|
1322 |
} |
|
1323 |
||
1324 |
// if the first or last segment are empty then we'll have to read-before-write |
|
1325 |
TInt64 lastSegmentStartPos = firstSegmentStartPos + ((segmentCount-1) << segmentSizeLog2); |
|
1326 |
||
1327 |
TInt startPosSegOffset = iCacheClient->CacheOffset(currentPos); |
|
1328 |
TInt endPosSegOffset = iCacheClient->CacheOffset(endPos); |
|
1329 |
||
1330 |
// partial first segment ? |
|
1331 |
if (startPosSegOffset != 0 && |
|
1332 |
firstSegmentStartPos < iFileCB->Size64() && |
|
1333 |
iCacheClient->SegmentEmpty(firstSegmentStartPos)) |
|
1334 |
{ |
|
1335 |
readFlags|= EReadFirstSegment; |
|
1336 |
} |
|
1337 |
||
1338 |
// partial last segment ? |
|
1339 |
// NB this may be the first segment too ! |
|
1340 |
if (endPosSegOffset != 0 && |
|
1341 |
endPos < lastSegmentStartPos + segmentSize && |
|
1342 |
endPos < iFileCB->Size64() && |
|
1343 |
iCacheClient->SegmentEmpty(lastSegmentStartPos)) |
|
1344 |
{ |
|
1345 |
readFlags|= EReadLastSegment; |
|
1346 |
} |
|
1347 |
||
1348 |
// read-before-write required ? |
|
1349 |
if (readFlags & EReadFirstSegment) |
|
1350 |
{ |
|
1351 |
readFlags&= ~EReadFirstSegment; |
|
1352 |
readPos = firstSegmentStartPos; |
|
1353 |
readAddr = addr; |
|
1354 |
readSegmentCount = 1; |
|
1355 |
// if the last segment is empty and it's the same as the first or contiguous, |
|
1356 |
// then read that too |
|
1357 |
if ((readFlags & EReadLastSegment) && (segmentCount <= 2)) |
|
1358 |
{ |
|
1359 |
readSegmentCount = segmentCount; |
|
1360 |
readFlags&= ~EReadLastSegment; |
|
1361 |
} |
|
1362 |
currentOperation->iState = EStReadFromDisk; |
|
1363 |
} |
|
1364 |
else if (readFlags & EReadLastSegment) |
|
1365 |
{ |
|
1366 |
readFlags&= ~EReadLastSegment; |
|
1367 |
readPos = lastSegmentStartPos; |
|
1368 |
readAddr = addr + ((segmentCount-1) << segmentSizeLog2); |
|
1369 |
readSegmentCount = 1; |
|
1370 |
currentOperation->iState = EStReadFromDisk; |
|
1371 |
} |
|
1372 |
else |
|
1373 |
{ |
|
1374 |
currentOperation->iState = EStCopyFromClient; |
|
1375 |
} |
|
1376 |
} |
|
1377 |
break; |
|
1378 |
||
1379 |
case EStReadFromDisk: |
|
1380 |
{ |
|
1381 |
// Save address & segmentCount in scratch area |
|
1382 |
currentOperation->iScratchValue0 = addr; |
|
1383 |
__ASSERT_DEBUG(segmentCount < 0xFFFF, Fault(EBadSegmentCount)); |
|
1384 |
currentOperation->iScratchValue1 = (TAny*) ((readFlags << 16) | segmentCount); |
|
1385 |
||
1386 |
TInt maxReadLen = readSegmentCount << segmentSizeLog2; |
|
1387 |
#ifdef __VC32__ |
|
1388 |
#pragma warning( disable : 4244 ) |
|
1389 |
//Disable Compiler Warning (levels 3 and 4) C4244: 'conversion' conversion from 'type1' to 'type2', possible loss of data |
|
1390 |
// maxReadLen is of 31 bits. Hence Min result is reduced to 31 bits |
|
1391 |
#endif |
|
1392 |
TInt readLen = (TInt)Min((TInt64)maxReadLen, (iSize64 - readPos)); |
|
1393 |
#ifdef __VC32__ |
|
1394 |
#pragma warning( default : 4244 ) |
|
1395 |
#endif |
|
1396 |
__ASSERT_DEBUG (aMsgRequest.Message().Handle() != NULL, Fault(EMsgAlreadyCompleted)); |
|
1397 |
TInt r = aMsgRequest.PushOperation( |
|
1398 |
readPos, readLen, readAddr, 0, |
|
1399 |
CompleteWrite, |
|
1400 |
EStReadFromDiskComplete, |
|
1401 |
EFsFileRead); |
|
1402 |
if (r != KErrNone) |
|
1403 |
{ |
|
1404 |
lastError = KErrNoMemory; |
|
1405 |
currentOperation->iState = EStEnd; |
|
1406 |
iCacheClient->UnlockSegments(firstSegmentStartPos); |
|
1407 |
break; |
|
1408 |
} |
|
1409 |
||
1410 |
// requeue this request |
|
1411 |
return CFsRequest::EReqActionContinue; |
|
1412 |
} |
|
1413 |
||
1414 |
case EStReadFromDiskComplete: |
|
1415 |
{ |
|
1416 |
__ASSERT_DEBUG(aMsgRequest.CurrentOperationPtr() != NULL, Fault(ECacheBadOperationIndex)); |
|
1417 |
// restore addr & segmentCount etc from scratch area |
|
1418 |
firstSegmentStartPos = currentPos & segmentSizeMask; |
|
1419 |
addr = (TUint8*) currentOperation->iScratchValue0; |
|
1420 |
segmentCount = ((TInt) currentOperation->iScratchValue1) & 0xFFFF; |
|
1421 |
readFlags = ((TInt) currentOperation->iScratchValue1) >> 16; |
|
1422 |
||
1423 |
if (readFlags & EReadLastSegment) |
|
1424 |
{ |
|
1425 |
TInt64 lastSegmentStartPos = firstSegmentStartPos + ((segmentCount-1) << segmentSizeLog2); |
|
1426 |
readFlags&= ~EReadLastSegment; |
|
1427 |
readPos = lastSegmentStartPos; |
|
1428 |
readAddr = addr + ((segmentCount-1) << segmentSizeLog2); |
|
1429 |
readSegmentCount = 1; |
|
1430 |
currentOperation->iState = EStReadFromDisk; |
|
1431 |
break; |
|
1432 |
} |
|
1433 |
||
1434 |
aMsgRequest.CurrentOperation().iState = EStCopyFromClient; |
|
1435 |
} |
|
1436 |
break; |
|
1437 |
||
1438 |
case EStCopyFromClient: |
|
1439 |
{ |
|
1440 |
TInt writeLen = segmentCount << segmentSizeLog2; |
|
1441 |
TInt offset = iCacheClient->CacheOffset(currentPos); // offset into segment |
|
1442 |
writeLen = Min(writeLen - offset, totalLen); |
|
1443 |
||
1444 |
if (addr != NULL) |
|
1445 |
{ |
|
1446 |
__ASSERT_DEBUG (aMsgRequest.Message().Handle() != NULL, Fault(EMsgAlreadyCompleted)); |
|
1447 |
// copy from user buffer to cache buffer |
|
1448 |
TInt writeError = KErrNone; |
|
1449 |
if (currentOperation->iClientRequest) |
|
1450 |
{ |
|
1451 |
TPtr8 ptr(addr+offset, writeLen, writeLen); |
|
1452 |
writeError = aMsgRequest.Read(0, ptr, currentOffset); |
|
1453 |
} |
|
1454 |
else |
|
1455 |
{ |
|
1456 |
memcpy(addr+offset, ((TUint8*) currentOperation->iReadWriteArgs.iData) + currentOffset, writeLen); |
|
1457 |
} |
|
1458 |
||
1459 |
// "writing" past end of file ? |
|
1460 |
if (currentPos + writeLen > iSize64 && cachingWrites && lastError == KErrNone && writeError == KErrNone) |
|
1461 |
{ |
|
1462 |
__CACHE_PRINT2(_L("CACHEFILE: extending size old %ld new %ld"), iSize64, currentPos + totalLen); |
|
1463 |
iSize64 = currentPos + writeLen; |
|
1464 |
} |
|
1465 |
||
1466 |
TInt anyError = (writeError != KErrNone)?writeError:lastError; |
|
1467 |
||
1468 |
if (anyError == KErrNone) |
|
1469 |
iCacheClient->MarkSegmentsAsFilled(firstSegmentStartPos, segmentCount); |
|
1470 |
||
1471 |
if (cachingWrites && anyError == KErrNone) |
|
1472 |
{ |
|
1473 |
iCacheClient->MarkSegmentsAsDirty(firstSegmentStartPos, segmentCount); |
|
1474 |
// start dirty data timer |
|
1475 |
FileDirty(aMsgRequest); |
|
1476 |
} |
|
1477 |
||
1478 |
// unlock if we're not buffering writes (segments won't be unlocked if dirty) |
|
1479 |
iCacheClient->UnlockSegments(firstSegmentStartPos); |
|
1480 |
} |
|
1481 |
||
1482 |
currentOffset+= writeLen; |
|
1483 |
currentPos+= writeLen; |
|
1484 |
totalLen-= writeLen; |
|
1485 |
||
1486 |
currentOperation->iState = EStWriteToCache; |
|
1487 |
break; |
|
1488 |
} |
|
1489 |
||
1490 |
case EStWriteToCacheComplete: |
|
1491 |
{ |
|
1492 |
__ASSERT_DEBUG(aMsgRequest.CurrentOperationPtr() != NULL, Fault(ECacheBadOperationIndex)); |
|
1493 |
||
1494 |
if (lastError == KErrCancel) |
|
1495 |
{ |
|
1496 |
currentOperation->iState = EStEnd; |
|
1497 |
} |
|
1498 |
else if ((!cachingWrites) || (lastError != KErrNone)) |
|
1499 |
{ |
|
1500 |
// allow TFsFileWrite::DoRequestL() to proceed normally using original pos & len |
|
1501 |
__ASSERT_DEBUG(aMsgRequest.CurrentOperationPtr() != NULL, Fault(ECacheBadOperationIndex)); |
|
1502 |
||
1503 |
currentOperation->iState = EStWriteThrough; |
|
1504 |
} |
|
1505 |
else |
|
1506 |
{ |
|
1507 |
__CACHE_PRINT2(_L("CACHEFILE: write buffered pos %ld, len %d"), |
|
1508 |
aMsgRequest.CurrentOperation().iReadWriteArgs.iPos, aMsgRequest.CurrentOperation().iReadWriteArgs.iOffset); |
|
1509 |
__ASSERT_DEBUG(totalLen == 0, Fault(ECompletingWriteWithDataRemaining)); |
|
1510 |
||
1511 |
currentOperation->iState = EStEnd; |
|
1512 |
} |
|
1513 |
break; |
|
1514 |
} |
|
1515 |
||
1516 |
case EStWriteThrough: |
|
1517 |
||
1518 |
if (lastError == KErrCancel) |
|
1519 |
{ |
|
1520 |
currentOperation->iState = EStEnd; |
|
1521 |
break; |
|
1522 |
} |
|
1523 |
||
1524 |
// we're going to issue an uncached write so clear any error |
|
1525 |
lastError = KErrNone; |
|
1526 |
||
1527 |
if (cachingWrites) |
|
1528 |
{ |
|
201
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1529 |
TInt r = DoFlushDirty(aNewRequest, &aMsgRequest, EFlushAll); |
0 | 1530 |
#ifdef _DEBUG |
1531 |
if (r == CFsRequest::EReqActionBusy) |
|
1532 |
CCacheManagerFactory::CacheManager()->Stats().iWriteThroughWithDirtyDataCount++; |
|
1533 |
#endif |
|
1534 |
// Need to reset currentOperation.iReadWriteArgs.iTotalLength here to make sure |
|
1535 |
// TFsFileWrite::PostInitialise() doesn't think there's no data left to process |
|
1536 |
aMsgRequest.ReStart(); |
|
139
95f71bcdcdb7
Revision: 201021
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
109
diff
changeset
|
1537 |
|
95f71bcdcdb7
Revision: 201021
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
109
diff
changeset
|
1538 |
//Need to preserve the current state otherwise if we are over the ram threshold |
95f71bcdcdb7
Revision: 201021
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
109
diff
changeset
|
1539 |
//the request can end up in a livelock trying to repeatedly flush. |
95f71bcdcdb7
Revision: 201021
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
109
diff
changeset
|
1540 |
currentOperation->iState = EStWriteThrough; |
95f71bcdcdb7
Revision: 201021
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
109
diff
changeset
|
1541 |
|
0 | 1542 |
if (r == CFsRequest::EReqActionBusy || r != CFsRequest::EReqActionComplete) |
1543 |
return r; |
|
1544 |
} |
|
1545 |
||
1546 |
retCode = CFsRequest::EReqActionContinue; |
|
1547 |
||
1548 |
// fall into...EStRestart |
|
1549 |
currentOperation->iState = EStReStart; |
|
1550 |
||
1551 |
case EStReStart: |
|
1552 |
||
1553 |
__ASSERT_DEBUG(retCode == CFsRequest::EReqActionBusy || retCode == CFsRequest::EReqActionContinue, Fault(EBadRetCode)); |
|
1554 |
||
1555 |
aMsgRequest.ReStart(); |
|
1556 |
UpdateSharePosition(aMsgRequest, *currentOperation); |
|
1557 |
if (currentOperation->iClientRequest) |
|
1558 |
currentOperation->iReadWriteArgs.iPos = currentOperation->iClientPosition; // NB maybe KCurrentPosition64 |
|
1559 |
return retCode; |
|
1560 |
||
1561 |
case EStEnd: |
|
1562 |
return retCode; |
|
1563 |
} |
|
1564 |
} |
|
1565 |
} |
|
1566 |
||
1567 |
||
1568 |
||
1569 |
TInt CFileCache::AllocateRequest(CFsClientMessageRequest*& aNewRequest, TBool aWrite, CSessionFs* aSession) |
|
1570 |
{ |
|
1571 |
||
1572 |
RLocalMessage msgNew; |
|
1573 |
const TOperation& oP = OperationArray[aWrite?EFsFileWriteDirty:EFsFileRead]; |
|
1574 |
TInt r = RequestAllocator::GetMessageRequest(oP, msgNew, aNewRequest); |
|
1575 |
if (r != KErrNone) |
|
1576 |
return r; |
|
1577 |
||
1578 |
aNewRequest->Set(msgNew, oP, aSession); |
|
1579 |
aNewRequest->SetDrive(iDrive); |
|
1580 |
||
1581 |
// read-aheads and write-dirty requests should not be posted to plugins |
|
1582 |
// If there are data-modifying plugins, then these should sit above the file cache |
|
1583 |
aNewRequest->iCurrentPlugin = NULL; |
|
1584 |
aNewRequest->EnablePostIntercept(EFalse); |
|
1585 |
||
1586 |
// Scratch value is a CFileCB pointer NOT a CFileShare for requests |
|
1587 |
// allocated by the file cache |
|
1588 |
aNewRequest->SetScratchValue64( MAKE_TINT64(EFalse, (TUint) iFileCB) ); |
|
1589 |
||
1590 |
// don't call Initialise(), don't call PostInitialise() |
|
1591 |
aNewRequest->SetState(CFsRequest::EReqStateDoRequest); |
|
1592 |
||
1593 |
// don't call Message().Complete() |
|
1594 |
aNewRequest->SetCompleted(EFalse); |
|
1595 |
||
1596 |
__ASSERT_DEBUG(aNewRequest->CurrentOperationPtr() == NULL, Fault(EBadOperationIndex)); |
|
1597 |
||
1598 |
return KErrNone; |
|
1599 |
} |
|
1600 |
||
1601 |
TInt CFileCache::FlushDirty(CFsRequest* aOldRequest) |
|
1602 |
{ |
|
1603 |
iLock.Wait(); |
|
1604 |
||
1605 |
CFsClientMessageRequest* newRequest = NULL; |
|
1606 |
||
201
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1607 |
TInt r = DoFlushDirty(newRequest, aOldRequest, EFlushAll); |
0 | 1608 |
|
1609 |
iLock.Signal(); |
|
1610 |
||
1611 |
if (newRequest) |
|
1612 |
{ |
|
1613 |
//To be used in notification framework. |
|
1614 |
//newRequest->iUID = aOldRequest->Message().Identity(); |
|
1615 |
newRequest->Dispatch(); |
|
1616 |
} |
|
1617 |
||
1618 |
return r; |
|
1619 |
} |
|
1620 |
||
1621 |
||
1622 |
void CFileCache::Purge(TBool aPurgeDirty) |
|
1623 |
{ |
|
1624 |
iLock.Wait(); |
|
1625 |
||
1626 |
iCacheClient->Purge(aPurgeDirty); |
|
1627 |
||
1628 |
iLock.Signal(); |
|
1629 |
} |
|
1630 |
||
1631 |
void CFileCache::PropagateFlushErrorToAllFileShares() |
|
1632 |
{ |
|
109
b3a1d9898418
Revision: 201019
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1633 |
ASSERT(IsDriveThread()); |
b3a1d9898418
Revision: 201019
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1634 |
TDblQueIter<CFileShare> fileShareIter(iFileCB->FileShareList()); |
b3a1d9898418
Revision: 201019
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1635 |
CFileShare* pFileShare; |
b3a1d9898418
Revision: 201019
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1636 |
while ((pFileShare = fileShareIter++) != NULL) |
0 | 1637 |
{ |
109
b3a1d9898418
Revision: 201019
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
0
diff
changeset
|
1638 |
pFileShare->iFlushError = iFlushError; |
0 | 1639 |
} |
1640 |
} |
|
1641 |
||
1642 |
/** |
|
1643 |
CFileCache::DoFlushDirty() |
|
1644 |
||
201
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1645 |
@param aFlushMode. The flush mode which indicates how many cache-lines to flush. @See TFlushMode |
0 | 1646 |
|
1647 |
returns CFsRequest::EReqActionBusy if a flush is in progress OR cacheline already in use |
|
1648 |
CFsRequest::EReqActionComplete if nothing to flush / flush completed |
|
1649 |
KErrNoMemory if failed to allocate a request |
|
1650 |
or one of the system wide error codes |
|
1651 |
||
1652 |
*/ |
|
201
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1653 |
TInt CFileCache::DoFlushDirty(CFsClientMessageRequest*& aNewRequest, CFsRequest* aOldRequest, TFlushMode aFlushMode) |
0 | 1654 |
{ |
1655 |
TInt64 pos; |
|
1656 |
TUint8* addr; |
|
1657 |
||
201
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1658 |
__ASSERT_ALWAYS(aNewRequest == NULL, Fault(EFlushingWithAllocatedRequest)); |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1659 |
|
0 | 1660 |
if (iFlushBusy) |
1661 |
return CFsRequest::EReqActionBusy; |
|
1662 |
||
1663 |
TInt segmentCount = iCacheClient->FindFirstDirtySegment(pos, addr); |
|
1664 |
||
1665 |
if (segmentCount == 0) |
|
1666 |
{ |
|
1667 |
TInt flushError = iFlushError; |
|
1668 |
iFlushError = KErrNone; |
|
1669 |
||
1670 |
// If this flush didn't originate from a client request return last error |
|
1671 |
if (!aOldRequest || !aOldRequest->Session()) |
|
1672 |
return (flushError == KErrNone)? CFsRequest::EReqActionComplete : flushError; |
|
1673 |
||
1674 |
// Return the last error from CFileShare::iFlushError |
|
1675 |
// and then clear CFileShare::iFlushError |
|
1676 |
||
1677 |
CFileShare* share = (CFileShare*) SessionObjectFromHandle( |
|
1678 |
aOldRequest->Message().Int3(), |
|
1679 |
FileShares->UniqueID(), |
|
1680 |
aOldRequest->Session()); |
|
1681 |
||
1682 |
TInt r = KErrNone; |
|
1683 |
if (share) |
|
1684 |
{ |
|
1685 |
r = share->iFlushError; |
|
1686 |
share->iFlushError = KErrNone; |
|
1687 |
} |
|
1688 |
if (r == KErrNone) |
|
1689 |
return CFsRequest::EReqActionComplete; |
|
1690 |
||
1691 |
return r; |
|
1692 |
} |
|
1693 |
||
1694 |
||
1695 |
// NB aOldRequest->Session may be NULL - e.g for FileShareCloseOp |
|
1696 |
CSessionFs* session = aOldRequest && aOldRequest->Session() ? aOldRequest->Session() : iDirtyDataOwner; |
|
1697 |
||
1698 |
__ASSERT_ALWAYS(session, Fault(EFlushingWithSessionNull)); |
|
1699 |
||
1700 |
TInt r = AllocateRequest(aNewRequest, ETrue, session); |
|
1701 |
if (r != KErrNone) |
|
1702 |
return r; |
|
1703 |
||
1704 |
r = aNewRequest->PushOperation(0, 0, (TUint8*) NULL, 0); |
|
1705 |
||
1706 |
if (r != KErrNone) |
|
1707 |
{ |
|
1708 |
aNewRequest->Free(); |
|
1709 |
aNewRequest = NULL; |
|
1710 |
return r; |
|
1711 |
} |
|
1712 |
||
201
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|
1713 |
// set the flush mode |
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|
1714 |
aNewRequest->CurrentOperation().iScratchValue0 = (TAny*) aFlushMode; |
0 | 1715 |
|
1716 |
// issue flush request |
|
1717 |
r = FlushDirtySm(*aNewRequest); |
|
1718 |
||
1719 |
// We should only get three possible return codes from FlushDirtySm() : |
|
1720 |
// CFsRequest::EReqActionContinue - a write request (aNewRequest) needs to be dispatched |
|
1721 |
// CFsRequest::EReqActionComplete - completed already - this can happen if dirty data was beyond file end |
|
1722 |
// CFsRequest::EReqActionBusy - first dirty cacheline is already in use. |
|
1723 |
__ASSERT_DEBUG( r == CFsRequest::EReqActionContinue || r == CFsRequest::EReqActionComplete || r == CFsRequest::EReqActionBusy, Fault(EBadRetCode)); |
|
1724 |
if (r == CFsRequest::EReqActionContinue || r == CFsRequest::EReqActionBusy) |
|
1725 |
{ |
|
1726 |
// requeue the caller's request (aOldRequest) if there is one |
|
1727 |
return CFsRequest::EReqActionBusy; |
|
1728 |
} |
|
1729 |
else // CFsRequest::EReqActionComplete |
|
1730 |
{ |
|
201
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|
1731 |
// Return any allocation failures etc to client |
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|
1732 |
TInt lastError = aNewRequest->LastError(); |
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|
1733 |
if (lastError != KErrNone) |
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|
1734 |
r = lastError; |
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|
1735 |
|
0 | 1736 |
aNewRequest->PopOperation(); |
1737 |
aNewRequest->Free(); |
|
1738 |
aNewRequest = NULL; |
|
1739 |
return r; |
|
1740 |
} |
|
1741 |
||
1742 |
} |
|
1743 |
||
1744 |
||
1745 |
TInt TFsFileWriteDirty::PostInitialise(CFsRequest* aRequest) |
|
1746 |
{ |
|
1747 |
return CFileCache::CompleteFlushDirty(aRequest); |
|
1748 |
} |
|
1749 |
||
1750 |
TInt CFileCache::CompleteFlushDirty(CFsRequest* aRequest) |
|
1751 |
{ |
|
1752 |
CFsMessageRequest& msgRequest = *(CFsMessageRequest*) aRequest; |
|
1753 |
||
1754 |
CFileShare* share; |
|
1755 |
CFileCB* file; |
|
1756 |
GetFileFromScratch(aRequest, share, file); |
|
1757 |
CFileCache* fileCache = file->FileCache(); |
|
1758 |
||
1759 |
__ASSERT_DEBUG(fileCache != NULL, Fault(ENoFileCache)); |
|
1760 |
||
1761 |
#ifdef _DEBUG |
|
1762 |
TInt cancelling = (msgRequest.LastError() == KErrCancel)?(TBool)ETrue:(TBool)EFalse; |
|
1763 |
#endif |
|
1764 |
||
1765 |
fileCache->iLock.Wait(); |
|
1766 |
TInt r = fileCache->FlushDirtySm(msgRequest); |
|
1767 |
fileCache->iLock.Signal(); |
|
1768 |
||
1769 |
#ifdef _DEBUG |
|
1770 |
__ASSERT_DEBUG(!cancelling || msgRequest.LastError() == KErrCancel, Fault(ERequestUncancelled)); |
|
1771 |
#endif |
|
1772 |
||
1773 |
// if this request has been cancelled we mustn't dispatch it again - |
|
1774 |
// we still need to call state machine however so that any locked segments can be unlocked |
|
1775 |
if (msgRequest.LastError() == KErrCancel) |
|
1776 |
r = CFsRequest::EReqActionComplete; |
|
1777 |
||
1778 |
return r; |
|
1779 |
} |
|
1780 |
||
1781 |
TInt CFileCache::FlushDirtySm(CFsMessageRequest& aMsgRequest) |
|
1782 |
{ |
|
1783 |
enum states |
|
1784 |
{ |
|
1785 |
EStBegin=0, |
|
1786 |
EStWriteToDisk, |
|
1787 |
EStWriteToDiskComplete, |
|
1788 |
EStMarkAsClean, |
|
1789 |
EStEnd |
|
1790 |
}; |
|
1791 |
||
1792 |
TMsgOperation* currentOperation = &aMsgRequest.CurrentOperation(); |
|
1793 |
TInt& lastError = aMsgRequest.LastError(); |
|
1794 |
TInt64 pos = 0; |
|
1795 |
||
1796 |
for(;;) |
|
1797 |
{ |
|
1798 |
||
1799 |
switch(currentOperation->iState) |
|
1800 |
{ |
|
1801 |
case EStBegin: |
|
1802 |
iFlushBusy = ETrue; |
|
1803 |
||
1804 |
// fall into... |
|
1805 |
||
1806 |
case EStWriteToDisk: |
|
1807 |
{ |
|
1808 |
currentOperation->iState = EStWriteToDisk; |
|
1809 |
||
1810 |
TUint8* addr; |
|
1811 |
TInt segmentCount = iCacheClient->FindFirstDirtySegment(pos, addr); |
|
1812 |
||
1813 |
// if no more dirty segments of if a genuine error then finish |
|
1814 |
// NB if the request has been cancelled then we still need to proceed and mark all the |
|
1815 |
// segments as clean, otherwise they will never get freed ! |
|
1816 |
if (segmentCount == 0 || (lastError != KErrNone && lastError != KErrCancel)) |
|
1817 |
{ |
|
1818 |
currentOperation->iState = EStEnd; |
|
1819 |
break; |
|
1820 |
} |
|
1821 |
||
1822 |
TInt len = segmentCount << SegmentSizeLog2(); |
|
1823 |
||
1824 |
if (pos < iSize64) |
|
1825 |
// Result of Min shall be of size TInt |
|
1826 |
// Hence to suppress warning |
|
1827 |
len = (TInt)(Min(iSize64 - pos, (TInt64)len)); |
|
1828 |
else |
|
1829 |
len = 0; |
|
1830 |
||
1831 |
||
1832 |
// if writing past end of file or this request has been cancelled, just mark as clean |
|
1833 |
if (len == 0 || lastError == KErrCancel) |
|
1834 |
{ |
|
1835 |
currentOperation->iState = EStMarkAsClean; |
|
1836 |
break; |
|
1837 |
} |
|
1838 |
||
201
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|
1839 |
#ifdef SETSIZE_BEFORE_WRITE |
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|
1840 |
TInt64 physicalFileSize = iFileCB->Size64(); |
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|
1841 |
if ((pos + (TInt64) len) > physicalFileSize) |
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|
1842 |
{ |
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|
1843 |
// Need to switch to drive thread before calling CFileCB::SetSizeL() |
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|
1844 |
if (!IsDriveThread()) |
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|
1845 |
{ |
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|
1846 |
aMsgRequest.SetState(CFsRequest::EReqStatePostInitialise); |
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|
1847 |
return CFsRequest::EReqActionBusy; |
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|
1848 |
} |
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|
1849 |
__CACHE_PRINT2(_L("CACHEFILE: Increasing uncached size from %ld to %ld"), iFileCB->Size64(), iSize64); |
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|
1850 |
TInt r; |
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|
1851 |
|
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|
1852 |
r = CheckDiskSpace(iSize64 - physicalFileSize, &aMsgRequest); |
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|
1853 |
if(r == KErrNone) |
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|
1854 |
TRAP(r, iFileCB->SetSizeL(iSize64)) |
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|
1855 |
if (r == KErrNone) |
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|
1856 |
{ |
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|
1857 |
iFileCB->SetSize64(iSize64, ETrue); // NB drive might be locked |
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|
1858 |
} |
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|
1859 |
} |
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|
1860 |
#endif |
0 | 1861 |
__CACHE_PRINT3(_L("CACHEFILE: FlushDirty first dirty pos %d, addr %08X count %d"), I64LOW(pos), addr, segmentCount); |
1862 |
||
1863 |
TInt filledSegmentCount; |
|
1864 |
TInt lockError; |
|
1865 |
addr = iCacheClient->FindAndLockSegments(pos, segmentCount, filledSegmentCount, lockError, ETrue); |
|
1866 |
||
1867 |
// If cacheline is busy, we need to post request to back of drive queue |
|
1868 |
// To dispatch to drive thread and intercept before DoRequestL() we must call iPostInitialise(), |
|
1869 |
// so set the state back to CFsRequest::EReqStatePostInitialise |
|
1870 |
if (lockError == KErrInUse) |
|
1871 |
{ |
|
1872 |
__CACHE_PRINT(_L("FlushDirtySm() - cacheline BUSY !")); |
|
1873 |
aMsgRequest.SetState(CFsRequest::EReqStatePostInitialise); |
|
1874 |
return CFsRequest::EReqActionBusy; |
|
1875 |
} |
|
1876 |
else if (lockError != KErrNone) |
|
1877 |
{ |
|
1878 |
iFlushBusy = EFalse; |
|
1879 |
lastError = lockError; |
|
1880 |
return CFsRequest::EReqActionComplete; |
|
1881 |
} |
|
1882 |
||
1883 |
currentOperation->Set(pos, len, addr, 0, EStWriteToDiskComplete); |
|
1884 |
if (pos < iSize64) |
|
1885 |
{ |
|
1886 |
TInt r = aMsgRequest.PushOperation( |
|
1887 |
pos, len, addr, 0, |
|
1888 |
CompleteFlushDirty, |
|
1889 |
EStWriteToDiskComplete); |
|
1890 |
if (r != KErrNone) |
|
1891 |
{ |
|
1892 |
iCacheClient->UnlockSegments(pos); |
|
1893 |
iFlushBusy = EFalse; |
|
1894 |
lastError = r; |
|
1895 |
return CFsRequest::EReqActionComplete; |
|
1896 |
} |
|
1897 |
||
1898 |
return CFsRequest::EReqActionContinue; // continue on to TFsFileWrite::DoRequestL()() |
|
1899 |
} |
|
1900 |
} |
|
1901 |
||
1902 |
case EStWriteToDiskComplete: |
|
1903 |
{ |
|
1904 |
#ifdef _DEBUG |
|
1905 |
// simulate a media eject to test critical error server |
|
1906 |
if (CCacheManagerFactory::CacheManager()->SimulateWriteFailureEnabled()) |
|
1907 |
{ |
|
1908 |
lastError = KErrNotReady; |
|
1909 |
iDrive->Dismount(); |
|
1910 |
} |
|
1911 |
#endif |
|
1912 |
pos = currentOperation->iReadWriteArgs.iPos; |
|
1913 |
iCacheClient->UnlockSegments(pos); |
|
1914 |
} |
|
1915 |
// fall into... |
|
1916 |
||
1917 |
case EStMarkAsClean: |
|
1918 |
{ |
|
1919 |
// NB pos must be set by EStWriteToDiskComplete or EStWriteToDisk |
|
1920 |
||
1921 |
if (lastError != KErrNone) |
|
1922 |
{ |
|
1923 |
__CACHE_PRINT1(_L("CACHEFILE: WriteThrough FAILED %d"), lastError); |
|
1924 |
||
1925 |
lastError = HandleWriteDirtyError(lastError); |
|
1926 |
||
1927 |
// retry ? |
|
1928 |
if (lastError == KErrNone) |
|
1929 |
{ |
|
1930 |
// clear error and try again |
|
1931 |
currentOperation->iState = EStWriteToDisk; |
|
1932 |
break; |
|
1933 |
} |
|
1934 |
||
1935 |
iFlushError = lastError; |
|
1936 |
PropagateFlushErrorToAllFileShares(); |
|
1937 |
||
1938 |
__CACHE_PRINT2(_L("CACHEFILE: Resetting size from %ld to %ld"), iSize64, iFileCB->Size64()); |
|
1939 |
SetSize64(iFileCB->Size64()); |
|
1940 |
} |
|
1941 |
||
1942 |
if (lastError != KErrNone) |
|
1943 |
{ |
|
1944 |
// Destroy ALL cached data (dirty and non-dirty) ! |
|
1945 |
iCacheClient->Purge(ETrue); |
|
1946 |
} |
|
1947 |
else |
|
1948 |
{ |
|
1949 |
// Mark segment as clean |
|
1950 |
iCacheClient->MarkSegmentsAsClean(pos); |
|
1951 |
} |
|
1952 |
||
1953 |
||
201
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|
1954 |
switch((TFlushMode) (TInt) currentOperation->iScratchValue0) |
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|
1955 |
{ |
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|
1956 |
case EFlushSingle: |
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|
1957 |
currentOperation->iState = EStEnd; |
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|
1958 |
break; |
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|
1959 |
case EFlushHalf: |
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|
1960 |
if (iCacheClient->LockedSegmentsHalfUsed()) |
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|
1961 |
currentOperation->iState = EStWriteToDisk; |
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|
1962 |
else |
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|
1963 |
currentOperation->iState = EStEnd; |
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|
1964 |
break; |
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|
1965 |
case EFlushAll: |
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|
1966 |
currentOperation->iState = EStWriteToDisk; |
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|
1967 |
break; |
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|
1968 |
default: |
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Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1969 |
ASSERT(0); |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1970 |
break; |
43365a9b78a3
Revision: 201027
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
152
diff
changeset
|
1971 |
} |
0 | 1972 |
} |
1973 |
break; |
|
1974 |
||
1975 |
case EStEnd: |
|
1976 |
{ |
|
1977 |
iFlushBusy = EFalse; |
|
1978 |
||
1979 |
TUint8* addr; |
|
1980 |
MarkFileClean(); |
|
1981 |
// Re-start dirty data timer if there is still some dirty data |
|
1982 |
if (iCacheClient->FindFirstDirtySegment(pos, addr) != 0) |
|
1983 |
FileDirty(aMsgRequest); |
|
1984 |
||
1985 |
return CFsRequest::EReqActionComplete; |
|
1986 |
} |
|
1987 |
} |
|
1988 |
} |
|
1989 |
} |
|
1990 |
||
1991 |
/** |
|
1992 |
Handle a dirty data write error |
|
1993 |
||
1994 |
Returns aError if dirty data should be thrown away or |
|
1995 |
KErrNone if write should be retried |
|
1996 |
*/ |
|
1997 |
TInt CFileCache::HandleWriteDirtyError(TInt aError) |
|
1998 |
{ |
|
1999 |
__THRD_PRINT3(_L(">TRACE: CFileCache::HandleWriteDirtyError() aError %d mounted %d changed %d"), aError, iDrive->IsMounted(), iDrive->IsChanged()); |
|
2000 |
||
2001 |
// normally the disk change will have been detected by TDrive::CheckMount() but occasionally, |
|
2002 |
// the change will occur while writing - in which case we need to mimick what TDrive::CheckMount does, |
|
2003 |
// to make sure we are in a consisten state i.e. dismount the drive and set iCurrentMount to NULL |
|
2004 |
if (iDrive->IsChanged()) |
|
2005 |
{ |
|
2006 |
iDrive->SetChanged(EFalse); |
|
2007 |
if (iDrive->IsMounted()) // Dismount the mount if it is still marked as mounted |
|
2008 |
iDrive->Dismount(); |
|
2009 |
} |
|
2010 |
||
2011 |
// if error didn't occur because of a media eject, do nothing |
|
2012 |
if (aError == KErrNotReady && !iDrive->IsMounted()) |
|
2013 |
{ |
|
2014 |
||
2015 |
TLocaleMessage line1; |
|
2016 |
TLocaleMessage line2; |
|
2017 |
line1=EFileServer_PutTheCardBackLine1; |
|
2018 |
line2=EFileServer_PutTheCardBackLine2; |
|
2019 |
||
2020 |
//-- create Notifier |
|
2021 |
CAsyncNotifier* notifier = CAsyncNotifier::New(); |
|
2022 |
if( !notifier ) |
|
2023 |
{ |
|
2024 |
return aError; |
|
2025 |
} |
|
2026 |
||
2027 |
notifier->SetMount(iMount); |
|
2028 |
||
2029 |
||
2030 |
// While this (drive) thread is calling the notifier server (& effectively suspended), |
|
2031 |
// the main thread may call TFsFileRead::PostInitialise() or TFsFileWrite::PostInitialise() |
|
2032 |
// which would cause dead-lock unless we release the lock here. We also need to release |
|
2033 |
// the lock before calling CDriveThread::CompleteReadWriteRequests(). |
|
2034 |
iLock.Signal(); |
|
2035 |
||
2036 |
FOREVER |
|
2037 |
{ |
|
2038 |
TInt buttonVal; |
|
2039 |
||
2040 |
TInt ret = notifier->Notify( |
|
2041 |
TLocaleMessageText(line1), |
|
2042 |
TLocaleMessageText(line2), |
|
2043 |
TLocaleMessageText(EFileServer_Button1), |
|
2044 |
TLocaleMessageText(EFileServer_Button2), |
|
2045 |
buttonVal); |
|
2046 |
if (ret!=KErrNone) |
|
2047 |
break; |
|
2048 |
if (buttonVal!=1) |
|
2049 |
break; // Abort |
|
2050 |
||
2051 |
||
2052 |
// Wait up to 3 seconds for a disk change - this is because there is often a substantial |
|
2053 |
// (one/two second) delay between inserting a card & getting a notification that the card is ready; |
|
2054 |
// if we give up too soon and fire of the notifier again, it's not very user-friendly ! |
|
2055 |
const TTimeIntervalMicroSeconds32 KHalfSecond(500000); |
|
2056 |
const TInt KRetries = 6;; |
|
2057 |
for (TInt n=0; !iDrive->IsChanged() && n<KRetries; n++) |
|
2058 |
User::After(KHalfSecond); |
|
2059 |
||
2060 |
||
2061 |
||
2062 |
// Without this code, retry will indiscriminately write over whatever disk happens to be present. |
|
2063 |
// However if the write error is to the bootsector remounting will always fail because the boot |
|
2064 |
// sector will have changed and hence the disk is useless. |
|
2065 |
// |
|
152
657f875b013e
Revision: 201023
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
139
diff
changeset
|
2066 |
OstTrace1(TRACE_FILESYSTEM, FSYS_ECMOUNTCBREMOUNT2, "drive %d", DriveNumber()); |
0 | 2067 |
|
2068 |
TInt remountSuccess = iDrive->ReMount(*iMount); |
|
2069 |
||
152
657f875b013e
Revision: 201023
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
139
diff
changeset
|
2070 |
OstTrace1(TRACE_FILESYSTEM, FSYS_ECMOUNTCBREMOUNT2RET, "success %d", remountSuccess); |
0 | 2071 |
if (!remountSuccess) |
2072 |
continue; |
|
2073 |
||
2074 |
||
2075 |
iMount->Drive().SetChanged(EFalse); |
|
2076 |
||
2077 |
aError = KErrNone; // Retry |
|
2078 |
break; |
|
2079 |
} |
|
2080 |
||
2081 |
delete notifier; |
|
2082 |
||
2083 |
||
2084 |
// Cancel hung state |
|
2085 |
FsThreadManager::SetDriveHung(DriveNumber(), EFalse); |
|
2086 |
||
2087 |
||
2088 |
// media had been removed and NOT replaced: so destroy ALL cached data |
|
2089 |
// (dirty and non-dirty) for all filecaches on this drive |
|
2090 |
if (aError != KErrNone) |
|
2091 |
{ |
|
2092 |
CDriveThread* pT=NULL; |
|
2093 |
TInt r=FsThreadManager::GetDriveThread(DriveNumber(), &pT); |
|
2094 |
if(r==KErrNone) |
|
2095 |
{ |
|
2096 |
pT->CompleteReadWriteRequests(); |
|
2097 |
iDrive->PurgeDirty(*iMount); |
|
2098 |
} |
|
2099 |
} |
|
2100 |
||
2101 |
iLock.Wait(); |
|
2102 |
} |
|
2103 |
||
2104 |
||
2105 |
return aError; |
|
2106 |
} |
|
2107 |
||
2108 |
||
2109 |
/** |
|
2110 |
Mark file as dirty |
|
2111 |
*/ |
|
2112 |
void CFileCache::FileDirty(CFsMessageRequest& aMsgRequest) |
|
2113 |
{ |
|
2114 |
CSessionFs* session = aMsgRequest.Session(); |
|
2115 |
__ASSERT_ALWAYS(session, Fault(EDirtyDataOwnerNull)); |
|
2116 |
||
2117 |
// Remember the last session which caused the file to become dirty |
|
2118 |
// Always record whether any session has reserved access so the CheckDiskSpace() behaves correctly |
|
2119 |
if (iDirtyDataOwner == NULL || session->ReservedAccess(iDriveNum)) |
|
2120 |
iDirtyDataOwner = session; |
|
2121 |
||
2122 |
// start a timer after which file will be flushed |
|
2123 |
CDriveThread* driveThread=NULL; |
|
2124 |
TInt r = FsThreadManager::GetDriveThread(iDriveNum, &driveThread); |
|
2125 |
if(r == KErrNone && driveThread != NULL) |
|
2126 |
iDirtyTimer.Start(driveThread, iDirtyDataFlushTime); |
|
2127 |
} |
|
2128 |
||
2129 |
//---------------------------------------------------------------------------- |
|
2130 |
/** |
|
2131 |
Mark the file as clean and stop dirty data timer |
|
2132 |
*/ |
|
2133 |
void CFileCache::MarkFileClean() |
|
2134 |
{ |
|
2135 |
iDirtyDataOwner = NULL; |
|
2136 |
||
2137 |
if (!iDriveThread) |
|
2138 |
return; |
|
2139 |
||
2140 |
iDirtyTimer.Stop(); |
|
2141 |
} |
|
2142 |
||
2143 |
||
2144 |
||
2145 |
//************************************ |
|
2146 |
// TFileCacheSettings |
|
2147 |
//************************************ |
|
2148 |
||
2149 |
RArray<TFileCacheSettings::TFileCacheConfig>* TFileCacheSettings::iFileCacheSettings = NULL; |
|
2150 |
||
2151 |
||
2152 |
||
2153 |
const TInt KDriveCacheSettingsArrayGranularity = 4; |
|
2154 |
||
2155 |
||
2156 |
TFileCacheSettings::TFileCacheConfig::TFileCacheConfig(TInt aDrive) : |
|
2157 |
iDrive(aDrive), |
|
2158 |
iFileCacheReadAsync(KDefaultFileCacheReadAsync), |
|
2159 |
iFairSchedulingLen(KDefaultFairSchedulingLen << KByteToByteShift), |
|
2160 |
iCacheSize(KDefaultFileCacheSize << KByteToByteShift), |
|
2161 |
iMaxReadAheadLen(KDefaultFileCacheMaxReadAheadLen << KByteToByteShift), |
|
2162 |
iClosedFileKeepAliveTime(KDefaultClosedFileKeepAliveTime << KByteToByteShift), // convert milliSecs -> microSecs (approximately) |
|
2163 |
iDirtyDataFlushTime(KDefaultDirtyDataFlushTime << KByteToByteShift) // convert milliSecs -> microSecs (approximately) |
|
2164 |
{ |
|
2165 |
iFlags = ConvertEnumToFlags(KDefaultFileCacheRead, KDefaultFileCacheReadAhead, KDefaultFileCacheWrite); |
|
2166 |
} |
|
2167 |
||
2168 |
||
2169 |
TFileCacheFlags TFileCacheSettings::TFileCacheConfig::ConvertEnumToFlags(const TInt aFileCacheRead, const TInt aFileCacheReadAhead, const TInt aFileCacheWrite) |
|
2170 |
{ |
|
2171 |
TInt flags(0); |
|
2172 |
||
2173 |
// read caching |
|
2174 |
if (aFileCacheRead == EFileCacheFlagEnabled) |
|
2175 |
flags|= EFileCacheReadEnabled; |
|
2176 |
else if (aFileCacheRead == EFileCacheFlagOn) |
|
2177 |
flags|= EFileCacheReadEnabled | EFileCacheReadOn; |
|
2178 |
||
2179 |
// read ahead |
|
2180 |
if (aFileCacheReadAhead == EFileCacheFlagEnabled) |
|
2181 |
flags|= EFileCacheReadAheadEnabled; |
|
2182 |
else if (aFileCacheReadAhead == EFileCacheFlagOn) |
|
2183 |
flags|= EFileCacheReadAheadEnabled | EFileCacheReadAheadOn; |
|
2184 |
||
2185 |
// write caching |
|
2186 |
if (aFileCacheWrite == EFileCacheFlagEnabled) |
|
2187 |
flags|= EFileCacheWriteEnabled; |
|
2188 |
else if (aFileCacheWrite == EFileCacheFlagOn) |
|
2189 |
flags|= EFileCacheWriteEnabled | EFileCacheWriteOn; |
|
2190 |
||
2191 |
return TFileCacheFlags(flags); |
|
2192 |
} |
|
2193 |
||
2194 |
||
2195 |
||
2196 |
_LIT8(KLitSectionNameDrive,"Drive%C"); |
|
2197 |
||
2198 |
static const TPtrC8 KCacheFlagEnumStrings[]= |
|
2199 |
{ |
|
2200 |
_S8("OFF"), |
|
2201 |
_S8("ENABLED"), |
|
2202 |
_S8("ON"), |
|
2203 |
_S8(""), // terminator |
|
2204 |
}; |
|
2205 |
const TInt KMaxEnumLen = 7; |
|
2206 |
||
2207 |
void TFileCacheSettings::ReadEnum(const TDesC8& aSection, const TDesC8& aProperty, TInt32& aEnumVal, const TPtrC8* aEnumStrings) |
|
2208 |
{ |
|
2209 |
TBuf8<KMaxEnumLen> buf; |
|
2210 |
if (!F32Properties::GetString(aSection, aProperty, buf)) |
|
2211 |
return; |
|
2212 |
TInt n; |
|
2213 |
const TPtrC8* enumString; |
|
2214 |
for (enumString=aEnumStrings, n=0; enumString->Length()!= 0; enumString++, n++) |
|
2215 |
{ |
|
2216 |
if (buf.LeftTPtr(enumString->Length()).MatchF(*enumString) == 0) |
|
2217 |
{ |
|
2218 |
aEnumVal = n; |
|
2219 |
break; |
|
2220 |
} |
|
2221 |
} |
|
2222 |
} |
|
2223 |
||
2224 |
TInt TFileCacheSettings::ReadPropertiesFile(TInt aDriveNumber) |
|
2225 |
{ |
|
2226 |
Init(); |
|
2227 |
||
2228 |
||
2229 |
if (!TGlobalFileCacheSettings::Enabled()) |
|
2230 |
return KErrNone; |
|
2231 |
||
2232 |
TFileCacheConfig* driveCacheSettings; |
|
2233 |
TInt r = GetFileCacheConfig(aDriveNumber, driveCacheSettings); |
|
2234 |
if (r != KErrNone) |
|
2235 |
return r; |
|
2236 |
||
2237 |
// restore default settings in case they've been changed by SetFlags() |
|
2238 |
driveCacheSettings->iFlags = TFileCacheConfig::ConvertEnumToFlags(KDefaultFileCacheRead, KDefaultFileCacheReadAhead, KDefaultFileCacheWrite); |
|
2239 |
||
2240 |
||
2241 |
// Get file cache configuration settings for this drive |
|
2242 |
// N.B. Size/length values are specified in Kilobytes, timer values in Milliseconds |
|
2243 |
TBuf8<8> sectionName; |
|
2244 |
sectionName.Format(KLitSectionNameDrive, 'A' + aDriveNumber); |
|
2245 |
||
2246 |
TInt32 val; |
|
2247 |
// Read FileCacheSize |
|
2248 |
if (F32Properties::GetInt(sectionName, _L8("FileCacheSize"), val)) |
|
2249 |
driveCacheSettings->iCacheSize = val << KByteToByteShift; |
|
2250 |
||
2251 |
// ensure read-ahead len is not greater than the cache size |
|
2252 |
driveCacheSettings->iMaxReadAheadLen = |
|
2253 |
Min(driveCacheSettings->iMaxReadAheadLen, driveCacheSettings->iCacheSize); |
|
2254 |
||
2255 |
// Read FileCacheReadAsync |
|
2256 |
TBool bVal; |
|
2257 |
if (F32Properties::GetBool(sectionName, _L8("FileCacheReadAsync"), bVal)) |
|
2258 |
driveCacheSettings->iFileCacheReadAsync = bVal; |
|
2259 |
||
2260 |
// Read FairSchedulingLen |
|
2261 |
if (F32Properties::GetInt(sectionName, _L8("FairSchedulingLen"), val)) |
|
2262 |
driveCacheSettings->iFairSchedulingLen = val << KByteToByteShift; |
|
2263 |
||
2264 |
// Read ClosedFileKeepAliveTime - convert miliSecs to microSecs (approximately) |
|
2265 |
if (F32Properties::GetInt(sectionName, _L8("ClosedFileKeepAliveTime"), val)) |
|
2266 |
driveCacheSettings->iClosedFileKeepAliveTime = val << KByteToByteShift; |
|
2267 |
||
2268 |
// Read DirtyDataFlushTime - convert miliSecs to microSecs (approximately) |
|
2269 |
if (F32Properties::GetInt(sectionName, _L8("DirtyDataFlushTime"), val)) |
|
2270 |
driveCacheSettings->iDirtyDataFlushTime = val << KByteToByteShift; |
|
2271 |
||
2272 |
// get read, read-ahead and write states |
|
2273 |
TInt32 readVal = KDefaultFileCacheRead; |
|
2274 |
TInt32 readAheadVal = KDefaultFileCacheReadAhead; |
|
2275 |
TInt32 writeVal = KDefaultFileCacheWrite; |
|
2276 |
||
2277 |
ReadEnum(sectionName, _L8("FileCacheRead"), readVal, &KCacheFlagEnumStrings[0]); |
|
2278 |
ReadEnum(sectionName, _L8("FileCacheReadAhead"), readAheadVal, &KCacheFlagEnumStrings[0]); |
|
2279 |
ReadEnum(sectionName, _L8("FileCacheWrite"), writeVal, &KCacheFlagEnumStrings[0]); |
|
2280 |
driveCacheSettings->iFlags = TFileCacheConfig::ConvertEnumToFlags(readVal, readAheadVal, writeVal); |
|
2281 |
||
2282 |
__CACHE_PRINT7(_L("ReadPropertiesFile() drive %C flags %08X CacheSize %d FileCacheReadAsync %d iFairSchedulingLen %d iClosedFileKeepAliveTime %d iDirtyDataFlushTime %d\n"), |
|
2283 |
aDriveNumber + 'A', |
|
2284 |
driveCacheSettings->iFlags, |
|
2285 |
driveCacheSettings->iCacheSize, |
|
2286 |
driveCacheSettings->iFileCacheReadAsync, |
|
2287 |
driveCacheSettings->iFairSchedulingLen, |
|
2288 |
driveCacheSettings->iClosedFileKeepAliveTime, |
|
2289 |
driveCacheSettings->iDirtyDataFlushTime); |
|
2290 |
||
2291 |
return KErrNone; |
|
2292 |
} |
|
2293 |
||
2294 |
||
2295 |
TInt TFileCacheSettings::GetFileCacheConfig(TInt aDrive, TFileCacheConfig*& aConfig) |
|
2296 |
{ |
|
2297 |
Init(); |
|
2298 |
||
2299 |
aConfig = NULL; |
|
2300 |
||
2301 |
TFileCacheConfig driveCacheSettingsToMatch(aDrive); |
|
2302 |
||
2303 |
TInt index = iFileCacheSettings->FindInUnsignedKeyOrder(driveCacheSettingsToMatch); |
|
2304 |
if (index == KErrNotFound) |
|
2305 |
{ |
|
2306 |
// create a new entry. |
|
2307 |
TInt r = iFileCacheSettings->InsertInUnsignedKeyOrder(driveCacheSettingsToMatch); |
|
2308 |
if (r != KErrNone) |
|
2309 |
return r; |
|
2310 |
index = iFileCacheSettings->FindInUnsignedKeyOrder(driveCacheSettingsToMatch); |
|
2311 |
__ASSERT_ALWAYS(index != KErrNotFound, Fault(ECacheSettingsNotFound)); |
|
2312 |
} |
|
2313 |
||
2314 |
aConfig = &(*iFileCacheSettings)[index]; |
|
2315 |
return KErrNone; |
|
2316 |
} |
|
2317 |
||
2318 |
void TFileCacheSettings::SetFlags(TInt aDrive, TFileCacheFlags aFlags) |
|
2319 |
{ |
|
2320 |
TFileCacheConfig* driveCacheSettings; |
|
2321 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2322 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2323 |
||
2324 |
driveCacheSettings->iFlags = aFlags; |
|
2325 |
} |
|
2326 |
||
2327 |
TFileCacheFlags TFileCacheSettings::Flags(TInt aDrive) |
|
2328 |
{ |
|
2329 |
TFileCacheConfig* driveCacheSettings; |
|
2330 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2331 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2332 |
||
2333 |
return driveCacheSettings->iFlags; |
|
2334 |
} |
|
2335 |
||
2336 |
void TFileCacheSettings::Init() |
|
2337 |
{ |
|
2338 |
if (iFileCacheSettings == NULL) |
|
2339 |
{ |
|
2340 |
iFileCacheSettings = new RArray<TFileCacheConfig>(KDriveCacheSettingsArrayGranularity, _FOFF(TFileCacheConfig, iDrive)); |
|
2341 |
__ASSERT_ALWAYS(iFileCacheSettings != NULL, Fault(ECacheSettingsInitFailed)); |
|
2342 |
} |
|
2343 |
} |
|
2344 |
||
2345 |
||
2346 |
TBool TFileCacheSettings::FileCacheReadAsync(TInt aDrive) |
|
2347 |
{ |
|
2348 |
TFileCacheConfig* driveCacheSettings; |
|
2349 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2350 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2351 |
||
2352 |
return driveCacheSettings->iFileCacheReadAsync; |
|
2353 |
} |
|
2354 |
||
2355 |
TInt TFileCacheSettings::FairSchedulingLen(TInt aDrive) |
|
2356 |
{ |
|
2357 |
TFileCacheConfig* driveCacheSettings; |
|
2358 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2359 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2360 |
||
2361 |
return driveCacheSettings->iFairSchedulingLen; |
|
2362 |
} |
|
2363 |
||
2364 |
TInt TFileCacheSettings::MaxReadAheadLen(TInt aDrive) |
|
2365 |
{ |
|
2366 |
TFileCacheConfig* driveCacheSettings; |
|
2367 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2368 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2369 |
||
2370 |
return driveCacheSettings->iMaxReadAheadLen; |
|
2371 |
} |
|
2372 |
||
2373 |
TInt TFileCacheSettings::CacheSize(TInt aDrive) |
|
2374 |
{ |
|
2375 |
TFileCacheConfig* driveCacheSettings; |
|
2376 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2377 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2378 |
||
2379 |
return driveCacheSettings->iCacheSize; |
|
2380 |
} |
|
2381 |
||
2382 |
TInt TFileCacheSettings::ClosedFileKeepAliveTime(TInt aDrive) |
|
2383 |
{ |
|
2384 |
TFileCacheConfig* driveCacheSettings; |
|
2385 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2386 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2387 |
||
2388 |
return driveCacheSettings->iClosedFileKeepAliveTime; |
|
2389 |
} |
|
2390 |
||
2391 |
||
2392 |
TInt TFileCacheSettings::DirtyDataFlushTime(TInt aDrive) |
|
2393 |
{ |
|
2394 |
TFileCacheConfig* driveCacheSettings; |
|
2395 |
TInt r = GetFileCacheConfig(aDrive, driveCacheSettings); |
|
2396 |
__ASSERT_ALWAYS(r == KErrNone && driveCacheSettings != NULL, Fault(ECacheSettingGetFailed)); |
|
2397 |
||
2398 |
return driveCacheSettings->iDirtyDataFlushTime; |
|
2399 |
} |
|
2400 |
||
2401 |
//************************************ |
|
2402 |
// TClosedFileUtils |
|
2403 |
//************************************ |
|
2404 |
||
2405 |
CFsObjectCon* TClosedFileUtils::iClosedFiles = NULL; |
|
2406 |
||
2407 |
void TClosedFileUtils::InitL() |
|
2408 |
{ |
|
2409 |
iClosedFiles = TheContainer->CreateL(); |
|
2410 |
if (iClosedFiles == NULL) |
|
2411 |
User::LeaveIfError(KErrNoMemory); |
|
2412 |
||
2413 |
} |
|
2414 |
||
2415 |
||
2416 |
TBool TClosedFileUtils::IsClosed(CFileCache* aFileCache) |
|
2417 |
{ |
|
2418 |
return (aFileCache->Container() == iClosedFiles); |
|
2419 |
} |
|
2420 |
||
2421 |
TInt TClosedFileUtils::Count() |
|
2422 |
{ |
|
2423 |
return iClosedFiles->Count(); |
|
2424 |
} |
|
2425 |
||
2426 |
CFileCache* TClosedFileUtils::At(TInt aIndex) |
|
2427 |
{ |
|
2428 |
return (CFileCache*) (*iClosedFiles)[aIndex]; |
|
2429 |
} |
|
2430 |
||
2431 |
||
2432 |
// Add a closed file to closed file container |
|
2433 |
void TClosedFileUtils::AddL(CFileCache* aFileCache, TBool aLock) |
|
2434 |
{ |
|
2435 |
if (aFileCache->iDriveThread) |
|
2436 |
{ |
|
2437 |
iClosedFiles->AddL(aFileCache, aLock); |
|
2438 |
||
2439 |
// start a timer after which file will be removed from closed queue |
|
2440 |
CDriveThread* driveThread=NULL; |
|
2441 |
TInt r = FsThreadManager::GetDriveThread(aFileCache->iDriveNum, &driveThread); |
|
2442 |
if(r == KErrNone && driveThread != NULL) |
|
2443 |
aFileCache->iClosedTimer.Start(driveThread, aFileCache->iClosedFileKeepAliveTime); |
|
2444 |
} |
|
2445 |
} |
|
2446 |
||
2447 |
||
2448 |
||
2449 |
// Remove a closed file from closed file container so that it can be re-opened |
|
2450 |
void TClosedFileUtils::ReOpen(CFileCache* aFileCache, TBool aLock) |
|
2451 |
{ |
|
2452 |
// get the drive thread in case it has changed since the file was last open |
|
2453 |
const TInt r = FsThreadManager::GetDriveThread(aFileCache->iDriveNum, &aFileCache->iDriveThread); |
|
2454 |
if ((r == KErrNone) && aFileCache->iDriveThread) |
|
2455 |
aFileCache->iClosedTimer.Stop(); |
|
2456 |
||
2457 |
iClosedFiles->Remove(aFileCache, aLock); |
|
2458 |
} |
|
2459 |
||
2460 |
// Remove all closed files from closed file container and close them for good |
|
2461 |
void TClosedFileUtils::Remove() |
|
2462 |
{ |
|
2463 |
RemoveFiles(NULL, NULL); |
|
2464 |
} |
|
2465 |
||
2466 |
// Remove all closed files belonging to a particular TDrive from closed file container and close them for good |
|
2467 |
void TClosedFileUtils::Remove(TInt aDrvNumber) |
|
2468 |
{ |
|
2469 |
RemoveFiles(&TClosedFileUtils::TestDrive, (TAny*) aDrvNumber); |
|
2470 |
} |
|
2471 |
||
2472 |
// Remove a closed file from closed file container and close it for good |
|
2473 |
void TClosedFileUtils::Remove(CFileCache* aFileCache) |
|
2474 |
{ |
|
2475 |
RemoveFiles(&TClosedFileUtils::TestFile, (TAny*) aFileCache); |
|
2476 |
} |
|
2477 |
||
2478 |
void TClosedFileUtils::RemoveFiles(TTestFunc aTestFunc, TAny* aTestVal) |
|
2479 |
{ |
|
2480 |
Lock(); |
|
2481 |
||
2482 |
TInt count = TClosedFileUtils::Count(); |
|
2483 |
while(count--) |
|
2484 |
{ |
|
2485 |
CFileCache& file = *(CFileCache*)(*iClosedFiles)[count]; |
|
2486 |
if ((aTestFunc == NULL) || ((*aTestFunc)(file, aTestVal))) |
|
2487 |
{ |
|
2488 |
iClosedFiles->Remove(&file, EFalse); |
|
2489 |
file.Close(); |
|
2490 |
} |
|
2491 |
} |
|
2492 |
||
2493 |
Unlock(); |
|
2494 |
} |
|
2495 |
||
2496 |
||
2497 |
TBool TClosedFileUtils::TestDrive(CFileCache& aFileCache, TAny* aVal) |
|
2498 |
{ |
|
2499 |
TBool r = (aFileCache.iDriveNum == (TInt) aVal)?(TBool) ETrue: (TBool) EFalse; |
|
2500 |
if (r) |
|
2501 |
{ |
|
2502 |
__CACHE_PRINT1(_L("CLOSEDFILES: TestDrive() closing %S\n"), &aFileCache.FileNameF() ); |
|
2503 |
} |
|
2504 |
return r; |
|
2505 |
} |
|
2506 |
TBool TClosedFileUtils::TestFile(CFileCache& aFileCache, TAny* aVal) |
|
2507 |
{ |
|
2508 |
TBool r = (&aFileCache == ((CFileCache*) aVal))?(TBool)ETrue:(TBool)EFalse; |
|
2509 |
if (r) |
|
2510 |
{ |
|
2511 |
__CACHE_PRINT1(_L("CLOSEDFILES: TestFile() closing %S\n"), &aFileCache.FileNameF() ); |
|
2512 |
} |
|
2513 |
return r; |
|
2514 |
} |
|
2515 |
||
2516 |
||
2517 |
||
2518 |
void TClosedFileUtils::Lock() |
|
2519 |
{ |
|
2520 |
iClosedFiles->Lock(); |
|
2521 |
} |
|
2522 |
||
2523 |
void TClosedFileUtils::Unlock() |
|
2524 |
{ |
|
2525 |
iClosedFiles->Unlock(); |
|
2526 |
} |
|
2527 |
||
2528 |