From 38d6d37f2d982fa959e9e8a4a3f7e1ccfad7b5d4 Mon Sep 17 00:00:00 2001 From: Jacek Antonelli Date: Fri, 15 Aug 2008 23:44:46 -0500 Subject: Second Life viewer sources 1.13.2.12 --- linden/indra/llvfs/llvfs.h | 170 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 170 insertions(+) create mode 100644 linden/indra/llvfs/llvfs.h (limited to 'linden/indra/llvfs/llvfs.h') diff --git a/linden/indra/llvfs/llvfs.h b/linden/indra/llvfs/llvfs.h new file mode 100644 index 0000000..f7affd4 --- /dev/null +++ b/linden/indra/llvfs/llvfs.h @@ -0,0 +1,170 @@ +/** + * @file llvfs.h + * @brief Definition of virtual file system + * + * Copyright (c) 2002-2007, Linden Research, Inc. + * + * 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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. + */ + +#ifndef LL_LLVFS_H +#define LL_LLVFS_H + +#include +#include +#include +#include "lluuid.h" +#include "linked_lists.h" +#include "llassettype.h" +#include "llthread.h" + +enum EVFSValid +{ + VFSVALID_UNKNOWN = 0, + VFSVALID_OK = 1, + VFSVALID_BAD_CORRUPT = 2, + VFSVALID_BAD_CANNOT_OPEN_READONLY = 3, + VFSVALID_BAD_CANNOT_CREATE = 4 +}; + +// Lock types for open vfiles, pending async reads, and pending async appends +// (There are no async normal writes, currently) +enum EVFSLock +{ + VFSLOCK_OPEN = 0, + VFSLOCK_READ = 1, + VFSLOCK_APPEND = 2, + + VFSLOCK_COUNT = 3 +}; + +// internal classes +class LLVFSBlock; +class LLVFSFileBlock; +class LLVFSFileSpecifier +{ +public: + LLVFSFileSpecifier(); + LLVFSFileSpecifier(const LLUUID &file_id, const LLAssetType::EType file_type); + bool operator<(const LLVFSFileSpecifier &rhs) const; + bool operator==(const LLVFSFileSpecifier &rhs) const; + +public: + LLUUID mFileID; + LLAssetType::EType mFileType; +}; + +class LLVFS +{ +public: + // Pass 0 to not presize + LLVFS(const char *index_filename, const char *data_filename, const BOOL read_only, const U32 presize, const BOOL remove_after_crash); + ~LLVFS(); + + BOOL isValid() const { return (VFSVALID_OK == mValid); } + EVFSValid getValidState() const { return mValid; } + + // ---------- The following fucntions lock/unlock mDataMutex ---------- + BOOL getExists(const LLUUID &file_id, const LLAssetType::EType file_type); + S32 getSize(const LLUUID &file_id, const LLAssetType::EType file_type); + + BOOL checkAvailable(S32 max_size); + + S32 getMaxSize(const LLUUID &file_id, const LLAssetType::EType file_type); + BOOL setMaxSize(const LLUUID &file_id, const LLAssetType::EType file_type, S32 max_size); + + void renameFile(const LLUUID &file_id, const LLAssetType::EType file_type, + const LLUUID &new_id, const LLAssetType::EType &new_type); + void removeFile(const LLUUID &file_id, const LLAssetType::EType file_type); + + S32 getData(const LLUUID &file_id, const LLAssetType::EType file_type, U8 *buffer, S32 location, S32 length); + S32 storeData(const LLUUID &file_id, const LLAssetType::EType file_type, const U8 *buffer, S32 location, S32 length); + + void incLock(const LLUUID &file_id, const LLAssetType::EType file_type, EVFSLock lock); + void decLock(const LLUUID &file_id, const LLAssetType::EType file_type, EVFSLock lock); + BOOL isLocked(const LLUUID &file_id, const LLAssetType::EType file_type, EVFSLock lock); + // ---------------------------------------------------------------- + + // Used to trigger evil WinXP behavior of "preloading" entire file into memory. + void pokeFiles(); + + // Verify that the index file contents match the in-memory file structure + // Very slow, do not call routinely. JC + void audit(); + // Check for uninitialized blocks. Slow, do not call in release. JC + void checkMem(); + // for debugging, prints a map of the vfs + void dumpMap(); + void dumpLockCounts(); + void dumpStatistics(); + void dumpFiles(); + +protected: + void removeFileBlock(LLVFSFileBlock *fileblock); + + void eraseBlockLength(LLVFSBlock *block); + void eraseBlock(LLVFSBlock *block); + void addFreeBlock(LLVFSBlock *block); + //void mergeFreeBlocks(); + void useFreeSpace(LLVFSBlock *free_block, S32 length); + void sync(LLVFSFileBlock *block, BOOL remove = FALSE); + void presizeDataFile(const U32 size); + + static FILE *openAndLock(const char *filename, const char *mode, BOOL read_lock); + static void unlockAndClose(FILE *fp); + + // Can initiate LRU-based file removal to make space. + // The immune file block will not be removed. + LLVFSBlock *findFreeBlock(S32 size, LLVFSFileBlock *immune = NULL); + + // lock/unlock data mutex (mDataMutex) + void lockData() { mDataMutex->lock(); } + void unlockData() { mDataMutex->unlock(); } + +protected: + LLMutex* mDataMutex; + + typedef std::map fileblock_map; + fileblock_map mFileBlocks; + + typedef std::multimap blocks_length_map_t; + blocks_length_map_t mFreeBlocksByLength; + typedef std::multimap blocks_location_map_t; + blocks_location_map_t mFreeBlocksByLocation; + + FILE *mDataFP; + FILE *mIndexFP; + + std::deque mIndexHoles; + + char *mIndexFilename; + char *mDataFilename; + BOOL mReadOnly; + + EVFSValid mValid; + + S32 mLockCounts[VFSLOCK_COUNT]; + BOOL mRemoveAfterCrash; +}; + +extern LLVFS *gVFS; + +#endif -- cgit v1.1