llvfsthread.h
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- /**
- * @file llvfsthread.h
- * @brief LLVFSThread definition
- *
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2010, 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