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/**
* @file llvfsthread.h
* @brief LLVFSThread definition
*
* $LicenseInfo:firstyear=2001&license=viewergpl$
*
* Copyright (c) 2001-2009, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at
* http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_LLVFSTHREAD_H
#define LL_LLVFSTHREAD_H
#include <queue>
#include <string>
#include <map>
#include <set>
#include "llapr.h"
#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
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