--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/userlibandfileserver/fileserver/sfile/sf_cache.h	Mon Oct 19 15:55:17 2009 +0100
@@ -0,0 +1,149 @@
+// Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// f32\sfile\sf_cache.h
+// 
+//
+
+#if !defined(__SF_CACHE_H__)
+#define __SF_CACHE_H__
+#include "sf_image.h"
+
+// Cached information for each file
+class TRomImageHeader;
+class TDirectoryCacheHeader;
+class TFileCacheRecord : public TImageInfo
+	{
+public:
+	inline const TText8* NameText() const
+		{ return (const TText8*)(this + 1); }
+	inline TPtrC8 Name() const
+		{ return TPtrC8(NameText(), iNameLength); }
+	inline const TUint8* ExportDescription() const
+		{ return NameText() + iNameLength; }
+	inline TBool ExtrasValid() const
+		{ return iUid[0]; }
+	inline const TRomImageHeader* RomImageHeader() const
+		{ return (const TRomImageHeader*)iUid[0]; }
+	inline void SetXIP(const TRomImageHeader* aR)
+		{ iUid[0] = (TUint32)aR; }
+	inline TBool IsXIP() const
+		{ return !(iUid[0]&3); }
+	static TInt Order(const TFileCacheRecord& aL, const TFileCacheRecord& aR);
+	void Dump(const char* aTitle);
+public:
+	TInt GetImageInfo(RImageInfo& aInfo, const TDesC8& aPathName, TDirectoryCacheHeader* aDirHead, TInt aIndex);
+public:
+	// UID1 must be EXE or DLL, 0 means extra information not valid
+	// UID1 nonzero and multiple of 4 means XIP in which case it points to the ROM image header
+	// iExportDirCount = number of bytes available for export description if iUid[0]=0
+	// 8-bit name follows (store base+ext only, not version)
+	// export description follows name
+	};
+
+class TFileCacheRecordSearch : public TFileCacheRecord
+	{
+public:
+	TFileCacheRecordSearch(const TDesC8& aSearchName);
+public:
+	TUint8 iSearchName[KMaxKernelName];
+	};
+
+// Record of a cached path.
+class TPathListRecord
+	{
+public:
+	static TPathListRecord* FindPathNameInList(const TDesC8& aPath);
+	inline const TDesC8* PathName() const
+		{ return (const TDesC8*)(this + 1); }
+	static TInt Init();
+private:
+	void MoveToHead();
+	static TPathListRecord* New(const TDesC8& aPath, TBool aKeep);
+	static TPathListRecord* DoFindPathNameInList(const TDesC8& aPath);
+	static TPathListRecord* AddToPathList(const TDesC8& aPath, TBool aKeep);
+public:
+	TPathListRecord* iNext;
+	TBool iKeep;
+	// place a TBufC8 immediately after
+public:
+	static TPathListRecord* First;
+	static TPathListRecord* LastStatic;
+	};
+
+class TCacheHeapList
+	{
+public:
+	TCacheHeapList(TInt aSize);
+	TAny* Allocate(TInt aBytes);
+public:
+	TCacheHeapList* iNext;
+private:
+	TInt iAllocated;
+	TInt iSize;
+	};
+
+class TDirectoryCacheHeader;
+NONSHARABLE_CLASS(CCacheNotifyDirChange) : public CActive
+	{
+public:
+	CCacheNotifyDirChange(TDriveNumber aDrive, TDirectoryCacheHeader& aDirHead);
+	~CCacheNotifyDirChange();
+	TInt RegisterNotification(TPathListRecord* aPathRec, TNotifyType aType);
+	void DoCancel();
+	void RunL();
+private:
+    TDriveNumber iDrive;
+	TDirectoryCacheHeader* iDirHead;
+	};
+
+class TEntry;
+class TDirectoryCacheHeader
+	{
+public:
+	TDirectoryCacheHeader(TPathListRecord* aPath);
+	~TDirectoryCacheHeader();
+	TAny* Allocate(const TInt aBytes);
+	TFileCacheRecord* NewRecord(const TDesC8& aName, TUint32 aAttr, TUint32 aVer, const TEntry& aEntry);
+	TFileCacheRecord* NewRecord(const TFileCacheRecord& aRecord, TInt aEDS);
+	TInt PopulateFromDrive(const TDesC8& aPathName);
+public:
+	TDirectoryCacheHeader* iNext;		// list of directories per drive
+	TCacheHeapList* iFirstHeapBlock;	// heap blocks to hold TFileCacheRecord entries
+	TPathListRecord* iPath;
+	TInt iRecordCount;					// number of TFileCacheRecord entries
+	TFileCacheRecord** iCache;			// array of pointers to TFileCacheRecord entries
+	TBool iNotPresent;
+	CCacheNotifyDirChange* iNotify;
+private:
+	TInt GetMoreHeap();
+	};
+
+class TDriveCacheHeader
+	{
+public:
+	TDriveCacheHeader();
+	~TDriveCacheHeader();
+	TDirectoryCacheHeader* FindDirCache(TPathListRecord* aPath);
+	TInt GetDirCache(TDirectoryCacheHeader*& aCache, TPathListRecord* aPath, const TDesC8& aDriveAndPath);
+public:
+	TDirectoryCacheHeader* iDirectoryList; // List of Directories
+	TUint iDriveAtt;
+	TInt iDriveNumber;
+	};
+
+
+void InitializeFileNameCache();
+TInt CheckLoaderCacheInit();
+
+#endif