diff options
Diffstat (limited to 'indra/newview/llvocache.h')
| -rw-r--r-- | indra/newview/llvocache.h | 124 |
1 files changed, 100 insertions, 24 deletions
diff --git a/indra/newview/llvocache.h b/indra/newview/llvocache.h index 1970a1e72f..ed2bc8bafe 100644 --- a/indra/newview/llvocache.h +++ b/indra/newview/llvocache.h @@ -2,31 +2,25 @@ * @file llvocache.h * @brief Cache of objects on the viewer. * - * $LicenseInfo:firstyear=2003&license=viewergpl$ - * - * Copyright (c) 2003-2009, Linden Research, Inc. - * + * $LicenseInfo:firstyear=2003&license=viewerlgpl$ * 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 + * 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. * - * 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 + * 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. * - * 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. + * 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 * - * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO - * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, - * COMPLETENESS OR PERFORMANCE. + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ @@ -36,17 +30,18 @@ #include "lluuid.h" #include "lldatapacker.h" #include "lldlinked.h" +#include "lldir.h" //--------------------------------------------------------------------------- // Cache entries class LLVOCacheEntry; -class LLVOCacheEntry : public LLDLinked<LLVOCacheEntry> +class LLVOCacheEntry { public: LLVOCacheEntry(U32 local_id, U32 crc, LLDataPackerBinaryBuffer &dp); - LLVOCacheEntry(LLFILE *fp); + LLVOCacheEntry(LLAPRFile* apr_file); LLVOCacheEntry(); ~LLVOCacheEntry(); @@ -56,12 +51,15 @@ public: S32 getCRCChangeCount() const { return mCRCChangeCount; } void dump() const; - void writeToFile(LLFILE *fp) const; + BOOL writeToFile(LLAPRFile* apr_file) const; void assignCRC(U32 crc, LLDataPackerBinaryBuffer &dp); LLDataPackerBinaryBuffer *getDP(U32 crc); void recordHit(); void recordDupe() { mDupeCount++; } +public: + typedef std::map<U32, LLVOCacheEntry*> vocache_entry_map_t; + protected: U32 mLocalID; U32 mCRC; @@ -72,4 +70,82 @@ protected: U8 *mBuffer; }; +// +//Note: LLVOCache is not thread-safe +// +class LLVOCache +{ +private: + struct HeaderEntryInfo + { + HeaderEntryInfo() : mIndex(0), mHandle(0), mTime(0) {} + S32 mIndex; + U64 mHandle ; + U32 mTime ; + }; + + struct HeaderMetaInfo + { + HeaderMetaInfo() : mVersion(0){} + + U32 mVersion; + }; + + struct header_entry_less + { + bool operator()(const HeaderEntryInfo* lhs, const HeaderEntryInfo* rhs) const + { + return lhs->mTime < rhs->mTime; // older entry in front of queue (set) + } + }; + typedef std::set<HeaderEntryInfo*, header_entry_less> header_entry_queue_t; + typedef std::map<U64, HeaderEntryInfo*> handle_entry_map_t; +private: + LLVOCache() ; + +public: + ~LLVOCache() ; + + void initCache(ELLPath location, U32 size, U32 cache_version) ; + void removeCache(ELLPath location) ; + + void readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map) ; + void writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map, BOOL dirty_cache) ; + + void setReadOnly(BOOL read_only) {mReadOnly = read_only;} + +private: + void setDirNames(ELLPath location); + // determine the cache filename for the region from the region handle + void getObjectCacheFilename(U64 handle, std::string& filename); + void removeFromCache(U64 handle); + void readCacheHeader(); + void writeCacheHeader(); + void clearCacheInMemory(); + void removeCache() ; + void purgeEntries(); + BOOL updateEntry(const HeaderEntryInfo* entry); + BOOL checkRead(LLAPRFile* apr_file, void* src, S32 n_bytes) ; + BOOL checkWrite(LLAPRFile* apr_file, void* src, S32 n_bytes) ; + +private: + BOOL mEnabled; + BOOL mInitialized ; + BOOL mReadOnly ; + HeaderMetaInfo mMetaInfo; + U32 mCacheSize; + U32 mNumEntries; + std::string mHeaderFileName ; + std::string mObjectCacheDirName; + LLVolatileAPRPool* mLocalAPRFilePoolp ; + header_entry_queue_t mHeaderEntryQueue; + handle_entry_map_t mHandleEntryMap; + + static LLVOCache* sInstance ; +public: + static LLVOCache* getInstance() ; + static BOOL hasInstance() ; + static void destroyClass() ; +}; + #endif |