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authorBrad Kittenbrink <brad@lindenlab.com>2021-12-15 17:06:24 -0800
committerBrad Kittenbrink <brad@lindenlab.com>2021-12-15 17:06:24 -0800
commit1e6caa69e6576a87bb0b1b782bffdd0697fa0c2d (patch)
tree38f8f0136381a2e7f2b8fcba82d9781bdfab9273 /indra/llvfs/llvfs.h
parent95e2f6286c140b6d3a7562a7e73f70d0ab60685b (diff)
parent0a873cd95547f003878c6d00d0883ff792f4a865 (diff)
Merge remote-tracking branch 'origin/master' into brad/DRTVWR-550-mfa
Diffstat (limited to 'indra/llvfs/llvfs.h')
-rw-r--r--indra/llvfs/llvfs.h183
1 files changed, 0 insertions, 183 deletions
diff --git a/indra/llvfs/llvfs.h b/indra/llvfs/llvfs.h
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--- a/indra/llvfs/llvfs.h
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@@ -1,183 +0,0 @@
-/**
- * @file llvfs.h
- * @brief Definition of virtual file system
- *
- * $LicenseInfo:firstyear=2002&license=viewerlgpl$
- * 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_LLVFS_H
-#define LL_LLVFS_H
-
-#include <deque>
-#include "lluuid.h"
-#include "llassettype.h"
-#include "llthread.h"
-#include "llmutex.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
-{
-private:
- // Use createLLVFS() to open a VFS file
- // Pass 0 to not presize
- LLVFS(const std::string& index_filename,
- const std::string& data_filename,
- const BOOL read_only,
- const U32 presize,
- const BOOL remove_after_crash);
-public:
- ~LLVFS();
-
- // Use this function normally to create LLVFS files
- // Pass 0 to not presize
- static LLVFS * createLLVFS(const std::string& index_filename,
- const std::string& data_filename,
- const BOOL read_only,
- const U32 presize,
- const BOOL remove_after_crash);
-
- 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 listFiles();
- void dumpFiles();
- time_t creationTime();
-
-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 LLFILE *openAndLock(const std::string& 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<LLVFSFileSpecifier, LLVFSFileBlock*> fileblock_map;
- fileblock_map mFileBlocks;
-
- typedef std::multimap<S32, LLVFSBlock*> blocks_length_map_t;
- blocks_length_map_t mFreeBlocksByLength;
- typedef std::multimap<U32, LLVFSBlock*> blocks_location_map_t;
- blocks_location_map_t mFreeBlocksByLocation;
-
- LLFILE *mDataFP;
- LLFILE *mIndexFP;
-
- std::deque<S32> mIndexHoles;
-
- std::string mIndexFilename;
- std::string mDataFilename;
- BOOL mReadOnly;
-
- EVFSValid mValid;
-
- S32 mLockCounts[VFSLOCK_COUNT];
- BOOL mRemoveAfterCrash;
-};
-
-extern LLVFS *gVFS;
-
-#endif