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diff --git a/indra/llvfs/llvfsthread.h b/indra/llvfs/llvfsthread.h
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+++ b/indra/llvfs/llvfsthread.h
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+/** 
+ * @file llvfsthread.h
+ * @brief LLVFSThread definition
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLVFSTHREAD_H
+#define LL_LLVFSTHREAD_H
+
+#include <queue>
+#include <string>
+#include <map>
+#include <set>
+
+#include "llqueuedthread.h"
+
+#include "llvfs.h"
+
+//============================================================================
+
+class LLVFSThread : public LLQueuedThread
+{
+	//------------------------------------------------------------------------
+public:
+	enum operation_t {
+		FILE_READ,
+		FILE_WRITE,
+		FILE_RENAME
+	};
+
+	//------------------------------------------------------------------------
+public:
+
+	class Request : public QueuedRequest
+	{
+	protected:
+		~Request() {}; // use deleteRequest()
+		
+	public:
+		Request(handle_t handle, U32 priority, U32 flags,
+				operation_t op, LLVFS* vfs,
+				const LLUUID &file_id, const LLAssetType::EType file_type,
+				U8* buffer, S32 offset, S32 numbytes);
+
+		S32 getBytesRead()
+		{
+			return mBytesRead;
+		}
+		S32 getOperation()
+		{
+			return mOperation;
+		}
+		U8* getBuffer()
+		{
+			return mBuffer;
+		}
+		LLVFS* getVFS()
+		{
+			return mVFS;
+		}
+		std::string getFilename()
+		{
+			std::string tstring;
+			mFileID.toString(tstring);
+			return tstring;
+		}
+		
+		/*virtual*/ bool processRequest();
+		/*virtual*/ void finishRequest(bool completed);
+		/*virtual*/ void deleteRequest();
+		
+	private:
+		operation_t mOperation;
+		
+		LLVFS* mVFS;
+		LLUUID mFileID;
+		LLAssetType::EType mFileType;
+		
+		U8* mBuffer;	// dest for reads, source for writes, new UUID for rename
+		S32 mOffset;	// offset into file, -1 = append (WRITE only)
+		S32 mBytes;		// bytes to read from file, -1 = all (new mFileType for rename)
+		S32	mBytesRead;	// bytes read from file
+	};
+
+	//------------------------------------------------------------------------
+public:
+	static std::string sDataPath;
+	static LLVFSThread* sLocal;		// Default worker thread
+	
+public:
+	LLVFSThread(bool threaded = TRUE);
+	~LLVFSThread();	
+
+	// Return a Request handle
+	handle_t read(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,	/* Flawfinder: ignore */
+				  U8* buffer, S32 offset, S32 numbytes, U32 pri=PRIORITY_NORMAL, U32 flags = 0);
+	handle_t write(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
+				   U8* buffer, S32 offset, S32 numbytes, U32 flags);
+	// SJB: rename seems to have issues, especially when threaded
+// 	handle_t rename(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
+// 					const LLUUID &new_id, const LLAssetType::EType new_type, U32 flags);
+	// Return number of bytes read
+	S32 readImmediate(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
+					  U8* buffer, S32 offset, S32 numbytes);
+	S32 writeImmediate(LLVFS* vfs, const LLUUID &file_id, const LLAssetType::EType file_type,
+					   U8* buffer, S32 offset, S32 numbytes);
+
+	/*virtual*/ bool processRequest(QueuedRequest* req);
+
+public:
+	static void initClass(bool local_is_threaded = TRUE); // Setup sLocal
+	static S32 updateClass(U32 ms_elapsed);
+	static void cleanupClass();		// Delete sLocal
+	static void setDataPath(const std::string& path) { sDataPath = path; }
+};
+
+//============================================================================
+
+
+#endif // LL_LLVFSTHREAD_H