author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 22 Jan 2010 11:03:55 +0200 | |
changeset 12 | 0bf4040442f9 |
parent 9 | 96e5fb8b040d |
permissions | -rw-r--r-- |
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// Copyright (c) 1996-2009 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\sfsrv\cl_fraw.cpp |
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// |
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// |
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#include "cl_std.h" |
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/** |
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Opens a direct access channel to the disk. |
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Other resources are disabled from accessing the disk until Close() is called. |
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Note that if any resources are currently open on the disk, an error |
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is returned. |
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@param aFs The file server session. |
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@param aDrive The drive containing the disk to be accessed. Specify a drive |
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in the range EDriveA to EDriveZ for drives A to Z. |
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@return KErrNone, if successful; |
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KErrInUse is returned if any resources are currently open on the disk; |
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otherwise one of the other system-wide error codes. |
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@capability TCB |
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*/ |
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EXPORT_C TInt RRawDisk::Open(RFs& aFs,TInt aDrive) |
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{ |
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if (!RFs::IsValidDrive(aDrive)) |
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return(KErrArgument); |
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iDrive=aDrive; |
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return(CreateSubSession(aFs,EFsRawDiskOpen,TIpcArgs(aDrive))); |
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} |
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/** |
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Closes the direct access channel to the disk, and allows other resources |
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to access the disk. |
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*/ |
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EXPORT_C void RRawDisk::Close() |
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{ |
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CloseSubSession(EFsRawSubClose); |
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} |
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/** |
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Reads directly from the disk. |
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The function reads a number of bytes into the specified descriptor from |
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the disk, beginning at the specified position. |
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@param aPos The position on the disk at which to begin reading. |
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@param aDes The descriptor into which data is to be read. |
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On return aDes contains the data read. |
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@panic User In debug builds, the media driver panics if aPos is larger than |
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the size of the physical media or if the end address, given by |
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aPos + the maximum length of the descriptor, is greater than |
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the size of the physical media. |
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@return KErrNone, if successful, otherwise one of the other system-wide error |
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codes. |
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@capability TCB |
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*/ |
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EXPORT_C TInt RRawDisk::Read(TInt64 aPos,TDes8& aDes) |
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{ |
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TInt maxLength = aDes.MaxLength(); |
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if (maxLength==0) |
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return(KErrNone); |
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TPtrC8 tBuf((TUint8*)&aPos,sizeof(TInt64)); |
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return(SendReceive(EFsRawDiskRead,TIpcArgs(&aDes,maxLength,&tBuf))); |
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} |
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/** |
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Writes directly to the disk. |
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The function writes the contents of the specified descriptor to the |
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disk at position aPos. |
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@param aPos The position at which to begin writing. |
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@param aDes The descriptor containing the data to be written to the disk. |
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|
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@panic User In debug builds, the media driver panics if aPos is larger than |
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the size of the physical media or if the end address, given by |
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aPos + the maximum length of the descriptor, is greater than |
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the size of the physical media. |
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|
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@return KErrNone, if successful, otherwise one of the other system-wide error |
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codes. |
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@capability TCB |
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*/ |
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EXPORT_C TInt RRawDisk::Write(TInt64 aPos,TDesC8& aDes) |
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{ |
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TInt length = aDes.Length(); |
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if (length==0) |
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return(KErrNone); |
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TPtrC8 tBuf((TUint8*)&aPos,sizeof(TInt64)); |
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return(SendReceive(EFsRawDiskWrite,TIpcArgs(&aDes,length,&tBuf))); |
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} |
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|
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|
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|
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|
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// |
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// Old read / write methods left in to be BC |
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// |
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class _RRawDisk : public RRawDisk |
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{ |
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public: |
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IMPORT_C TInt Read(TInt aPos,TDes8& aDes); |
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IMPORT_C TInt Write(TInt aPos,TDesC8& aDes); |
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}; |
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|
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|
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|
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|
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/** |
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Reads directly from the disk. |
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|
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The function reads a number of bytes into the specified descriptor from |
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the disk beginning at the specified position. |
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|
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@param aPos The position on the disk at which to begin reading. |
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@param aDes The descriptor into which data is to be read. On return, contains the |
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data read. The number of bytes read is the smaller of: |
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a) the total number of bytes on the disk minus aPos; |
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b) the maximum length of the descriptor. |
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|
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@return KErrNone, if successful, otherwise one of the other system-wide error |
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codes. |
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|
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@capability TCB |
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@deprecated |
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*/ |
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EXPORT_C TInt _RRawDisk::Read(TInt aPos,TDes8& aDes) |
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{ |
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TInt maxLength = aDes.MaxLength(); |
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if (maxLength==0) |
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return(KErrNone); |
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TInt64 pos = MAKE_TINT64(0,aPos); |
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TPtrC8 tBuf((TUint8*)&pos,sizeof(TInt64)); |
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return(SendReceive(EFsRawDiskRead,TIpcArgs(&aDes,maxLength,&tBuf))); |
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} |
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|
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|
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|
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|
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/** |
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Writes directly to the disk. |
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|
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The function writes the contents of the specified descriptor to the |
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disk at position aPos. |
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|
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@param aPos The position at which to begin writing. |
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@param aDes The descriptor containing the data to be written to the disk. |
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|
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@return KErrNone, if successful, otherwise one of the other system-wide error |
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codes. |
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|
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@capability TCB |
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@deprecated |
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*/ |
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EXPORT_C TInt _RRawDisk::Write(TInt aPos,TDesC8& aDes) |
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{ |
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TInt length = aDes.Length(); |
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if (length==0) |
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return(KErrNone); |
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TInt64 pos = MAKE_TINT64(0,aPos); |
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TPtrC8 tBuf((TUint8*)&pos,sizeof(TInt64)); |
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return(SendReceive(EFsRawDiskWrite,TIpcArgs(&aDes,length,&tBuf))); |
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} |