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) 1995-2009 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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// fileserver/sfsrv/clnotification.h |
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// |
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/** |
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* @file |
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* @internalTechnology |
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* @released |
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*/ |
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#ifndef __CLNOTIFICATION_H__ |
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#define __CLNOTIFICATION_H__ |
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#include "f32notification.h" |
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/* |
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* This comment is: |
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* @internalTechnology |
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* |
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* In general, the getter functions for TFsNotification extract data from a given buffer in the order: |
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* <Notification Size> <Path Length> <Type> <Path> [any sub-class members] |
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* Notification of type EOverflow doesn't have a path associated with it |
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* If a new name exists (ERename, EVolumeName and EDriveName) then the order is: |
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* <Notification Size> <Path Length> <New Name Length> <Type> <Path> <New Name> |
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* For EAttribute the order is: |
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* <Notification Size> <Path Length> <Type> <Path> <Attribute> |
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* For EFileChange the order is: |
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* <Notification Size> <Path Length> <Type> <Path> <File Size> |
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*/ |
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/** |
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* A Mask of all the valid filters that a client can set |
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* @internalTechnology |
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*/ |
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const TInt KNotificationValidFiltersMask = (TUint)( |
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TFsNotification::EAttribute | |
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TFsNotification::ECreate | |
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TFsNotification::EDelete | |
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TFsNotification::EDriveName | |
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TFsNotification::EFileChange | |
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TFsNotification::EMediaChange | |
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TFsNotification::ERename | |
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TFsNotification::EVolumeName |
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); |
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/* |
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* Different notification types have different data associated with them. |
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* |
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* All types have the following data and are aligned in the buffer like so: |
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* Word1 : Size (TUint16 - upper 2 bytes) , NameLength (TUint16 - lower 2 bytes), |
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* Word2 : Type (TUint - 4 bytes) |
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* [not yet supported - Word3 : UID (TUint32 - 4 Bytes) ] |
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* |
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@internalTechnology |
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@released |
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*/ |
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const TInt KNotificationHeaderSize = (sizeof(TUint16)*2)+(sizeof(TUint)); |
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// |
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//When UID is added: |
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//const TInt KNotificationHeaderSize = (sizeof(TUint16)*2)+(sizeof(TUint))+sizeof(TUint32); |
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/* |
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* This is the minimum allowed size of the buffer set by the client that is |
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* equal to the size of a notification of maximum length and an overflow |
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* |
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@internalTechnology |
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@released |
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*/ |
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const TInt KMinNotificationBufferSize = 2*KNotificationHeaderSize + 2*KMaxFileName; |
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/** |
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* Fill any dead space at the end of the buffer with this |
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* If there is any dead space it should always be at least 1 word in size |
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* @internalTechnology |
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*/ |
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const TUint KNotificationBufferFiller = 0xFFFFFFFF; |
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class TFsNotification; //forward ref |
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/* This class is used as the buffer in the file server notifier framework. |
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* |
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* The buffer itself is simply a descriptor. |
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* |
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* This class is internal because we may wish to change the |
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* buffer mechanism in the future without BC breaks etc. |
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* |
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* @internalTechnology |
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*/ |
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class CFsNotificationList : public CBase |
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{ |
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public: |
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static CFsNotificationList* NewL(TInt aBufferSize); |
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virtual ~CFsNotificationList(); |
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private: |
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CFsNotificationList(); |
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const TFsNotification * NextNotification(); |
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TInt BufferSize() const; |
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HBufC8* iBuf; //Heap based to allow buffer size spec at runtime |
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TInt iHead; //offset to the head of the readable data. |
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TInt iTail; //offset to end of the readable data. |
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TPckg<TInt> iTailPckg; //stores iTail, used in Asyc IPC |
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TPtr8 iBufferPtr; //stores iBuf->Ptr, used in Asyc IPC |
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friend class RFsNotify; |
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friend class CFsNotify; |
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}; |
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/** |
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* @internalTechnology |
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*/ |
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class RFsNotify : public RSubSessionBase |
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{ |
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public: |
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TInt Open(RFs& aFs,CFsNotificationList* aBuffer, TRequestStatus& aBufferStatus); |
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void Close(); |
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//[Re]Issues notification request |
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void RequestNotifications(TRequestStatus& aStatus, TPckg<TInt>& aTailPckg); |
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TInt CancelNotifications(); |
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TInt AddNotification(TUint aNotificationType, const TDesC& aPath, const TDesC& aFilename); |
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TInt RemoveNotifications(); |
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}; |
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/** |
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* @internalTechnology |
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* |
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* This class is the iBody of CFsNotify. It is being used to shield the client from the internals which are being stored here. |
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* |
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* @see CFsNotify |
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*/ |
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class CFsNotifyBody : public CBase |
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{ |
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public: |
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virtual ~CFsNotifyBody(); |
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private: |
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CFsNotifyBody(); |
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TRequestStatus iBufferStatus; //for server->buffer updates |
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TRequestStatus* iClientStatus; //Client's TRS:for receiving notification |
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CFsNotificationList* iBuffer; //Buffer into which the server puts the notifications |
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RFsNotify iFsNotify; |
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friend class CFsNotify; |
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}; |
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#endif //__CLNOTIFICATION_H__ |
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