/** * @file lltexturecache.cpp * @brief Object which handles local texture caching * * $LicenseInfo:firstyear=2000&license=viewerlgpl$ * 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 * $/LicenseInfo$ */ #include "llviewerprecompiledheaders.h" #include "lltexturecache.h" #include "llapr.h" #include "lldir.h" #include "llimage.h" #include "lllfsthread.h" #include "llviewercontrol.h" // Included to allow LLTextureCache::purgeTextures() to pause watchdog timeout #include "llappviewer.h" // Cache organization: // cache/texture.entries // Unordered array of Entry structs // cache/texture.cache // First TEXTURE_CACHE_ENTRY_SIZE bytes of each texture in texture.entries in same order // cache/textures/[0-F]/UUID.texture // Actual texture body files //note: there is no good to define 1024 for TEXTURE_CACHE_ENTRY_SIZE while FIRST_PACKET_SIZE is 600 on sim side. const S32 TEXTURE_CACHE_ENTRY_SIZE = FIRST_PACKET_SIZE;//1024; const F32 TEXTURE_CACHE_PURGE_AMOUNT = .20f; // % amount to reduce the cache by when it exceeds its limit const F32 TEXTURE_CACHE_LRU_SIZE = .10f; // % amount for LRU list (low overhead to regenerate) class LLTextureCacheWorker : public LLWorkerClass { friend class LLTextureCache; private: class ReadResponder : public LLLFSThread::Responder { public: ReadResponder(LLTextureCache* cache, handle_t handle) : mCache(cache), mHandle(handle) {} ~ReadResponder() {} void completed(S32 bytes) { mCache->lockWorkers(); LLTextureCacheWorker* reader = mCache->getReader(mHandle); if (reader) reader->ioComplete(bytes); mCache->unlockWorkers(); } LLTextureCache* mCache; LLTextureCacheWorker::handle_t mHandle; }; class WriteResponder : public LLLFSThread::Responder { public: WriteResponder(LLTextureCache* cache, handle_t handle) : mCache(cache), mHandle(handle) {} ~WriteResponder() {} void completed(S32 bytes) { mCache->lockWorkers(); LLTextureCacheWorker* writer = mCache->getWriter(mHandle); if (writer) writer->ioComplete(bytes); mCache->unlockWorkers(); } LLTextureCache* mCache; LLTextureCacheWorker::handle_t mHandle; }; public: LLTextureCacheWorker(LLTextureCache* cache, U32 priority, const LLUUID& id, U8* data, S32 datasize, S32 offset, S32 imagesize, // for writes LLTextureCache::Responder* responder) : LLWorkerClass(cache, "LLTextureCacheWorker"), mID(id), mCache(cache), mPriority(priority), mReadData(NULL), mWriteData(data), mDataSize(datasize), mOffset(offset), mImageSize(imagesize), mImageFormat(IMG_CODEC_J2C), mImageLocal(FALSE), mResponder(responder), mFileHandle(LLLFSThread::nullHandle()), mBytesToRead(0), mBytesRead(0) { mPriority &= LLWorkerThread::PRIORITY_LOWBITS; } ~LLTextureCacheWorker() { llassert_always(!haveWork()); delete[] mReadData; } // override this interface virtual bool doRead() = 0; virtual bool doWrite() = 0; virtual bool doWork(S32 param); // Called from LLWorkerThread::processRequest() handle_t read() { addWork(0, LLWorkerThread::PRIORITY_HIGH | mPriority); return mRequestHandle; } handle_t write() { addWork(1, LLWorkerThread::PRIORITY_HIGH | mPriority); return mRequestHandle; } bool complete() { return checkWork(); } void ioComplete(S32 bytes) { mBytesRead = bytes; setPriority(LLWorkerThread::PRIORITY_HIGH | mPriority); } private: virtual void startWork(S32 param); // called from addWork() (MAIN THREAD) virtual void finishWork(S32 param, bool completed); // called from finishRequest() (WORK THREAD) virtual void endWork(S32 param, bool aborted); // called from doWork() (MAIN THREAD) protected: LLTextureCache* mCache; U32 mPriority; LLUUID mID; U8* mReadData; U8* mWriteData; S32 mDataSize; S32 mOffset; S32 mImageSize; EImageCodec mImageFormat; BOOL mImageLocal; LLPointer<LLTextureCache::Responder> mResponder; LLLFSThread::handle_t mFileHandle; S32 mBytesToRead; LLAtomicS32 mBytesRead; }; class LLTextureCacheLocalFileWorker : public LLTextureCacheWorker { public: LLTextureCacheLocalFileWorker(LLTextureCache* cache, U32 priority, const std::string& filename, const LLUUID& id, U8* data, S32 datasize, S32 offset, S32 imagesize, // for writes LLTextureCache::Responder* responder) : LLTextureCacheWorker(cache, priority, id, data, datasize, offset, imagesize, responder), mFileName(filename) { } virtual bool doRead(); virtual bool doWrite(); private: std::string mFileName; }; bool LLTextureCacheLocalFileWorker::doRead() { S32 local_size = LLAPRFile::size(mFileName, mCache->getLocalAPRFilePool()); if (local_size > 0 && mFileName.size() > 4) { mDataSize = local_size; // Only a complete file is valid std::string extension = mFileName.substr(mFileName.size() - 3, 3); mImageFormat = LLImageBase::getCodecFromExtension(extension); if (mImageFormat == IMG_CODEC_INVALID) { // llwarns << "Unrecognized file extension " << extension << " for local texture " << mFileName << llendl; mDataSize = 0; // no data return true; } } else { // file doesn't exist mDataSize = 0; // no data return true; } #if USE_LFS_READ if (mFileHandle == LLLFSThread::nullHandle()) { mImageLocal = TRUE; mImageSize = local_size; if (!mDataSize || mDataSize + mOffset > local_size) { mDataSize = local_size - mOffset; } if (mDataSize <= 0) { // no more data to read mDataSize = 0; return true; } mReadData = new U8[mDataSize]; mBytesRead = -1; mBytesToRead = mDataSize; setPriority(LLWorkerThread::PRIORITY_LOW | mPriority); mFileHandle = LLLFSThread::sLocal->read(local_filename, mReadData, mOffset, mDataSize, new ReadResponder(mCache, mRequestHandle)); return false; } else { if (mBytesRead >= 0) { if (mBytesRead != mBytesToRead) { // llwarns << "Error reading file from local cache: " << local_filename // << " Bytes: " << mDataSize << " Offset: " << mOffset // << " / " << mDataSize << llendl; mDataSize = 0; // failed delete[] mReadData; mReadData = NULL; } return true; } else { return false; } } #else if (!mDataSize || mDataSize > local_size) { mDataSize = local_size; } mReadData = new U8[mDataSize]; S32 bytes_read = LLAPRFile::readEx(mFileName, mReadData, mOffset, mDataSize, mCache->getLocalAPRFilePool()); if (bytes_read != mDataSize) { // llwarns << "Error reading file from local cache: " << mFileName // << " Bytes: " << mDataSize << " Offset: " << mOffset // << " / " << mDataSize << llendl; mDataSize = 0; delete[] mReadData; mReadData = NULL; } else { mImageSize = local_size; mImageLocal = TRUE; } return true; #endif } bool LLTextureCacheLocalFileWorker::doWrite() { // no writes for local files return false; } class LLTextureCacheRemoteWorker : public LLTextureCacheWorker { public: LLTextureCacheRemoteWorker(LLTextureCache* cache, U32 priority, const LLUUID& id, U8* data, S32 datasize, S32 offset, S32 imagesize, // for writes LLTextureCache::Responder* responder) : LLTextureCacheWorker(cache, priority, id, data, datasize, offset, imagesize, responder), mState(INIT) { } virtual bool doRead(); virtual bool doWrite(); private: enum e_state { INIT = 0, LOCAL = 1, CACHE = 2, HEADER = 3, BODY = 4 }; e_state mState; }; //virtual void LLTextureCacheWorker::startWork(S32 param) { } // This is where a texture is read from the cache system (header and body) // Current assumption are: // - the whole data are in a raw form, will be stored at mReadData // - the size of this raw data is mDataSize and can be smaller than TEXTURE_CACHE_ENTRY_SIZE (the size of a record in the header cache) // - the code supports offset reading but this is actually never exercised in the viewer bool LLTextureCacheRemoteWorker::doRead() { bool done = false; S32 idx = -1; S32 local_size = 0; std::string local_filename; // First state / stage : find out if the file is local if (mState == INIT) { #if 0 std::string filename = mCache->getLocalFileName(mID); // Is it a JPEG2000 file? { local_filename = filename + ".j2c"; local_size = LLAPRFile::size(local_filename, mCache->getLocalAPRFilePool()); if (local_size > 0) { mImageFormat = IMG_CODEC_J2C; } } // If not, is it a jpeg file? if (local_size == 0) { local_filename = filename + ".jpg"; local_size = LLAPRFile::size(local_filename, mCache->getLocalAPRFilePool()); if (local_size > 0) { mImageFormat = IMG_CODEC_JPEG; mDataSize = local_size; // Only a complete .jpg file is valid } } // Hmm... What about a targa file? (used for UI texture mostly) if (local_size == 0) { local_filename = filename + ".tga"; local_size = LLAPRFile::size(local_filename, mCache->getLocalAPRFilePool()); if (local_size > 0) { mImageFormat = IMG_CODEC_TGA; mDataSize = local_size; // Only a complete .tga file is valid } } // Determine the next stage: if we found a file, then LOCAL else CACHE mState = (local_size > 0 ? LOCAL : CACHE); llassert_always(mState == CACHE) ; #else mState = CACHE; #endif } // Second state / stage : if the file is local, load it and leave if (!done && (mState == LOCAL)) { llassert(local_size != 0); // we're assuming there is a non empty local file here... if (!mDataSize || mDataSize > local_size) { mDataSize = local_size; } // Allocate read buffer mReadData = new U8[mDataSize]; S32 bytes_read = LLAPRFile::readEx(local_filename, mReadData, mOffset, mDataSize, mCache->getLocalAPRFilePool()); if (bytes_read != mDataSize) { llwarns << "Error reading file from local cache: " << local_filename << " Bytes: " << mDataSize << " Offset: " << mOffset << " / " << mDataSize << llendl; mDataSize = 0; delete[] mReadData; mReadData = NULL; } else { //llinfos << "texture " << mID.asString() << " found in local_assets" << llendl; mImageSize = local_size; mImageLocal = TRUE; } // We're done... done = true; } // Second state / stage : identify the cache or not... if (!done && (mState == CACHE)) { LLTextureCache::Entry entry ; idx = mCache->getHeaderCacheEntry(mID, entry); if (idx < 0) { // The texture is *not* cached. We're done here... mDataSize = 0; // no data done = true; } else { mImageSize = entry.mImageSize ; // If the read offset is bigger than the header cache, we read directly from the body // Note that currently, we *never* read with offset from the cache, so the result is *always* HEADER mState = mOffset < TEXTURE_CACHE_ENTRY_SIZE ? HEADER : BODY; } } // Third state / stage : read data from the header cache (texture.entries) file if (!done && (mState == HEADER)) { llassert_always(idx >= 0); // we need an entry here or reading the header makes no sense llassert_always(mOffset < TEXTURE_CACHE_ENTRY_SIZE); S32 offset = idx * TEXTURE_CACHE_ENTRY_SIZE + mOffset; // Compute the size we need to read (in bytes) S32 size = TEXTURE_CACHE_ENTRY_SIZE - mOffset; size = llmin(size, mDataSize); // Allocate the read buffer mReadData = new U8[size]; S32 bytes_read = LLAPRFile::readEx(mCache->mHeaderDataFileName, mReadData, offset, size, mCache->getLocalAPRFilePool()); if (bytes_read != size) { llwarns << "LLTextureCacheWorker: " << mID << " incorrect number of bytes read from header: " << bytes_read << " / " << size << llendl; delete[] mReadData; mReadData = NULL; mDataSize = -1; // failed done = true; } // If we already read all we expected, we're actually done if (mDataSize <= bytes_read) { done = true; } else { mState = BODY; } } // Fourth state / stage : read the rest of the data from the UUID based cached file if (!done && (mState == BODY)) { std::string filename = mCache->getTextureFileName(mID); S32 filesize = LLAPRFile::size(filename, mCache->getLocalAPRFilePool()); if (filesize && (filesize + TEXTURE_CACHE_ENTRY_SIZE) > mOffset) { S32 max_datasize = TEXTURE_CACHE_ENTRY_SIZE + filesize - mOffset; mDataSize = llmin(max_datasize, mDataSize); S32 data_offset, file_size, file_offset; // Reserve the whole data buffer first U8* data = new U8[mDataSize]; // Set the data file pointers taking the read offset into account. 2 cases: if (mOffset < TEXTURE_CACHE_ENTRY_SIZE) { // Offset within the header record. That means we read something from the header cache. // Note: most common case is (mOffset = 0), so this is the "normal" code path. data_offset = TEXTURE_CACHE_ENTRY_SIZE - mOffset; // i.e. TEXTURE_CACHE_ENTRY_SIZE if mOffset nul (common case) file_offset = 0; file_size = mDataSize - data_offset; // Copy the raw data we've been holding from the header cache into the new sized buffer llassert_always(mReadData); memcpy(data, mReadData, data_offset); delete[] mReadData; mReadData = NULL; } else { // Offset bigger than the header record. That means we haven't read anything yet. data_offset = 0; file_offset = mOffset - TEXTURE_CACHE_ENTRY_SIZE; file_size = mDataSize; // No data from header cache to copy in that case, we skipped it all } // Now use that buffer as the object read buffer llassert_always(mReadData == NULL); mReadData = data; // Read the data at last S32 bytes_read = LLAPRFile::readEx(filename, mReadData + data_offset, file_offset, file_size, mCache->getLocalAPRFilePool()); if (bytes_read != file_size) { llwarns << "LLTextureCacheWorker: " << mID << " incorrect number of bytes read from body: " << bytes_read << " / " << file_size << llendl; delete[] mReadData; mReadData = NULL; mDataSize = -1; // failed done = true; } } else { // No body, we're done. mDataSize = llmax(TEXTURE_CACHE_ENTRY_SIZE - mOffset, 0); lldebugs << "No body file for: " << filename << llendl; } // Nothing else to do at that point... done = true; } // Clean up and exit return done; } // This is where *everything* about a texture is written down in the cache system (entry map, header and body) // Current assumption are: // - the whole data are in a raw form, starting at mWriteData // - the size of this raw data is mDataSize and can be smaller than TEXTURE_CACHE_ENTRY_SIZE (the size of a record in the header cache) // - the code *does not* support offset writing so there are no difference between buffer addresses and start of data bool LLTextureCacheRemoteWorker::doWrite() { bool done = false; S32 idx = -1; // First state / stage : check that what we're trying to cache is in an OK shape if (mState == INIT) { llassert_always(mOffset == 0); // We currently do not support write offsets llassert_always(mDataSize > 0); // Things will go badly wrong if mDataSize is nul or negative... llassert_always(mImageSize >= mDataSize); mState = CACHE; } // No LOCAL state for write(): because it doesn't make much sense to cache a local file... // Second state / stage : set an entry in the headers entry (texture.entries) file if (!done && (mState == CACHE)) { bool alreadyCached = false; LLTextureCache::Entry entry ; // Checks if this image is already in the entry list idx = mCache->getHeaderCacheEntry(mID, entry); if(idx < 0) { idx = mCache->setHeaderCacheEntry(mID, entry, mImageSize, mDataSize); // create the new entry. } else { alreadyCached = mCache->updateEntry(idx, entry, mImageSize, mDataSize); // update the existing entry. } if (idx < 0) { llwarns << "LLTextureCacheWorker: " << mID << " Unable to create header entry for writing!" << llendl; mDataSize = -1; // failed done = true; } else { if (alreadyCached && (mDataSize <= TEXTURE_CACHE_ENTRY_SIZE)) { // Small texture already cached case: we're done with writing done = true; } else { // If the texture has already been cached, we don't resave the header and go directly to the body part mState = alreadyCached ? BODY : HEADER; } } } // Third stage / state : write the header record in the header file (texture.cache) if (!done && (mState == HEADER)) { llassert_always(idx >= 0); // we need an entry here or storing the header makes no sense S32 offset = idx * TEXTURE_CACHE_ENTRY_SIZE; // skip to the correct spot in the header file S32 size = TEXTURE_CACHE_ENTRY_SIZE; // record size is fixed for the header S32 bytes_written; if (mDataSize < TEXTURE_CACHE_ENTRY_SIZE) { // We need to write a full record in the header cache so, if the amount of data is smaller // than a record, we need to transfer the data to a buffer padded with 0 and write that U8* padBuffer = new U8[TEXTURE_CACHE_ENTRY_SIZE]; memset(padBuffer, 0, TEXTURE_CACHE_ENTRY_SIZE); // Init with zeros memcpy(padBuffer, mWriteData, mDataSize); // Copy the write buffer bytes_written = LLAPRFile::writeEx(mCache->mHeaderDataFileName, padBuffer, offset, size, mCache->getLocalAPRFilePool()); delete [] padBuffer; } else { // Write the header record (== first TEXTURE_CACHE_ENTRY_SIZE bytes of the raw file) in the header file bytes_written = LLAPRFile::writeEx(mCache->mHeaderDataFileName, mWriteData, offset, size, mCache->getLocalAPRFilePool()); } if (bytes_written <= 0) { llwarns << "LLTextureCacheWorker: " << mID << " Unable to write header entry!" << llendl; mDataSize = -1; // failed done = true; } // If we wrote everything (may be more with padding) in the header cache, // we're done so we don't have a body to store if (mDataSize <= bytes_written) { done = true; } else { mState = BODY; } } // Fourth stage / state : write the body file, i.e. the rest of the texture in a "UUID" file name if (!done && (mState == BODY)) { llassert(mDataSize > TEXTURE_CACHE_ENTRY_SIZE); // wouldn't make sense to be here otherwise... S32 file_size = mDataSize - TEXTURE_CACHE_ENTRY_SIZE; { // build the cache file name from the UUID std::string filename = mCache->getTextureFileName(mID); // llinfos << "Writing Body: " << filename << " Bytes: " << file_offset+file_size << llendl; S32 bytes_written = LLAPRFile::writeEx( filename, mWriteData + TEXTURE_CACHE_ENTRY_SIZE, 0, file_size, mCache->getLocalAPRFilePool()); if (bytes_written <= 0) { llwarns << "LLTextureCacheWorker: " << mID << " incorrect number of bytes written to body: " << bytes_written << " / " << file_size << llendl; mDataSize = -1; // failed done = true; } } // Nothing else to do at that point... done = true; } // Clean up and exit return done; } //virtual bool LLTextureCacheWorker::doWork(S32 param) { bool res = false; if (param == 0) // read { res = doRead(); } else if (param == 1) // write { res = doWrite(); } else { llassert_always(0); } return res; } //virtual (WORKER THREAD) void LLTextureCacheWorker::finishWork(S32 param, bool completed) { if (mResponder.notNull()) { bool success = (completed && mDataSize > 0); if (param == 0) { // read if (success) { mResponder->setData(mReadData, mDataSize, mImageSize, mImageFormat, mImageLocal); mReadData = NULL; // responder owns data mDataSize = 0; } else { delete[] mReadData; mReadData = NULL; } } else { // write mWriteData = NULL; // we never owned data mDataSize = 0; } mCache->addCompleted(mResponder, success); } } //virtual (MAIN THREAD) void LLTextureCacheWorker::endWork(S32 param, bool aborted) { if (aborted) { // Let the destructor handle any cleanup return; } switch(param) { default: case 0: // read case 1: // write { if (mDataSize < 0) { // failed mCache->removeFromCache(mID); } break; } } } ////////////////////////////////////////////////////////////////////////////// LLTextureCache::LLTextureCache(bool threaded) : LLWorkerThread("TextureCache", threaded), mWorkersMutex(NULL), mHeaderMutex(NULL), mListMutex(NULL), mHeaderAPRFile(NULL), mReadOnly(TRUE), //do not allow to change the texture cache until setReadOnly() is called. mTexturesSizeTotal(0), mDoPurge(FALSE) { } LLTextureCache::~LLTextureCache() { clearDeleteList() ; writeUpdatedEntries() ; } ////////////////////////////////////////////////////////////////////////////// //virtual S32 LLTextureCache::update(U32 max_time_ms) { static LLFrameTimer timer ; static const F32 MAX_TIME_INTERVAL = 300.f ; //seconds. S32 res; res = LLWorkerThread::update(max_time_ms); mListMutex.lock(); handle_list_t priorty_list = mPrioritizeWriteList; // copy list mPrioritizeWriteList.clear(); responder_list_t completed_list = mCompletedList; // copy list mCompletedList.clear(); mListMutex.unlock(); lockWorkers(); for (handle_list_t::iterator iter1 = priorty_list.begin(); iter1 != priorty_list.end(); ++iter1) { handle_t handle = *iter1; handle_map_t::iterator iter2 = mWriters.find(handle); if(iter2 != mWriters.end()) { LLTextureCacheWorker* worker = iter2->second; worker->setPriority(LLWorkerThread::PRIORITY_HIGH | worker->mPriority); } } unlockWorkers(); // call 'completed' with workers list unlocked (may call readComplete() or writeComplete() for (responder_list_t::iterator iter1 = completed_list.begin(); iter1 != completed_list.end(); ++iter1) { Responder *responder = iter1->first; bool success = iter1->second; responder->completed(success); } if(!res && timer.getElapsedTimeF32() > MAX_TIME_INTERVAL) { timer.reset() ; writeUpdatedEntries() ; } return res; } ////////////////////////////////////////////////////////////////////////////// // search for local copy of UUID-based image file std::string LLTextureCache::getLocalFileName(const LLUUID& id) { // Does not include extension std::string idstr = id.asString(); // TODO: should we be storing cached textures in skin directory? std::string filename = gDirUtilp->getExpandedFilename(LL_PATH_LOCAL_ASSETS, idstr); return filename; } std::string LLTextureCache::getTextureFileName(const LLUUID& id) { std::string idstr = id.asString(); std::string delem = gDirUtilp->getDirDelimiter(); std::string filename = mTexturesDirName + delem + idstr[0] + delem + idstr + ".texture"; return filename; } //debug BOOL LLTextureCache::isInCache(const LLUUID& id) { LLMutexLock lock(&mHeaderMutex); id_map_t::const_iterator iter = mHeaderIDMap.find(id); return (iter != mHeaderIDMap.end()) ; } //debug BOOL LLTextureCache::isInLocal(const LLUUID& id) { S32 local_size = 0; std::string local_filename; std::string filename = getLocalFileName(id); // Is it a JPEG2000 file? { local_filename = filename + ".j2c"; local_size = LLAPRFile::size(local_filename, getLocalAPRFilePool()); if (local_size > 0) { return TRUE ; } } // If not, is it a jpeg file? { local_filename = filename + ".jpg"; local_size = LLAPRFile::size(local_filename, getLocalAPRFilePool()); if (local_size > 0) { return TRUE ; } } // Hmm... What about a targa file? (used for UI texture mostly) { local_filename = filename + ".tga"; local_size = LLAPRFile::size(local_filename, getLocalAPRFilePool()); if (local_size > 0) { return TRUE ; } } return FALSE ; } ////////////////////////////////////////////////////////////////////////////// //static const S32 MAX_REASONABLE_FILE_SIZE = 512*1024*1024; // 512 MB F32 LLTextureCache::sHeaderCacheVersion = 1.4f; U32 LLTextureCache::sCacheMaxEntries = MAX_REASONABLE_FILE_SIZE / TEXTURE_CACHE_ENTRY_SIZE; S64 LLTextureCache::sCacheMaxTexturesSize = 0; // no limit const char* entries_filename = "texture.entries"; const char* cache_filename = "texture.cache"; const char* old_textures_dirname = "textures"; //change the location of the texture cache to prevent from being deleted by old version viewers. const char* textures_dirname = "texturecache"; void LLTextureCache::setDirNames(ELLPath location) { std::string delem = gDirUtilp->getDirDelimiter(); mHeaderEntriesFileName = gDirUtilp->getExpandedFilename(location, textures_dirname, entries_filename); mHeaderDataFileName = gDirUtilp->getExpandedFilename(location, textures_dirname, cache_filename); mTexturesDirName = gDirUtilp->getExpandedFilename(location, textures_dirname); } void LLTextureCache::purgeCache(ELLPath location) { LLMutexLock lock(&mHeaderMutex); if (!mReadOnly) { setDirNames(location); llassert_always(mHeaderAPRFile == NULL); //remove the legacy cache if exists std::string texture_dir = mTexturesDirName ; mTexturesDirName = gDirUtilp->getExpandedFilename(location, old_textures_dirname); if(LLFile::isdir(mTexturesDirName)) { std::string file_name = gDirUtilp->getExpandedFilename(location, entries_filename); LLAPRFile::remove(file_name, getLocalAPRFilePool()); file_name = gDirUtilp->getExpandedFilename(location, cache_filename); LLAPRFile::remove(file_name, getLocalAPRFilePool()); purgeAllTextures(true); } mTexturesDirName = texture_dir ; } //remove the current texture cache. purgeAllTextures(true); } //is called in the main thread before initCache(...) is called. void LLTextureCache::setReadOnly(BOOL read_only) { mReadOnly = read_only ; } //called in the main thread. S64 LLTextureCache::initCache(ELLPath location, S64 max_size, BOOL texture_cache_mismatch) { llassert_always(getPending() == 0) ; //should not start accessing the texture cache before initialized. S64 header_size = (max_size * 2) / 10; S64 max_entries = header_size / TEXTURE_CACHE_ENTRY_SIZE; sCacheMaxEntries = (S32)(llmin((S64)sCacheMaxEntries, max_entries)); header_size = sCacheMaxEntries * TEXTURE_CACHE_ENTRY_SIZE; max_size -= header_size; if (sCacheMaxTexturesSize > 0) sCacheMaxTexturesSize = llmin(sCacheMaxTexturesSize, max_size); else sCacheMaxTexturesSize = max_size; max_size -= sCacheMaxTexturesSize; LL_INFOS("TextureCache") << "Headers: " << sCacheMaxEntries << " Textures size: " << sCacheMaxTexturesSize / (1024 * 1024) << " MB" << LL_ENDL; setDirNames(location); if(texture_cache_mismatch) { //if readonly, disable the texture cache, //otherwise wipe out the texture cache. purgeAllTextures(true); if(mReadOnly) { return max_size ; } } if (!mReadOnly) { LLFile::mkdir(mTexturesDirName); const char* subdirs = "0123456789abcdef"; for (S32 i=0; i<16; i++) { std::string dirname = mTexturesDirName + gDirUtilp->getDirDelimiter() + subdirs[i]; LLFile::mkdir(dirname); } } readHeaderCache(); purgeTextures(true); // calc mTexturesSize and make some room in the texture cache if we need it llassert_always(getPending() == 0) ; //should not start accessing the texture cache before initialized. return max_size; // unused cache space } //---------------------------------------------------------------------------- // mHeaderMutex must be locked for the following functions! LLAPRFile* LLTextureCache::openHeaderEntriesFile(bool readonly, S32 offset) { llassert_always(mHeaderAPRFile == NULL); apr_int32_t flags = readonly ? APR_READ|APR_BINARY : APR_READ|APR_WRITE|APR_BINARY; mHeaderAPRFile = new LLAPRFile(mHeaderEntriesFileName, flags, getLocalAPRFilePool()); if(offset > 0) { mHeaderAPRFile->seek(APR_SET, offset); } return mHeaderAPRFile; } void LLTextureCache::closeHeaderEntriesFile() { if(!mHeaderAPRFile) { return ; } delete mHeaderAPRFile; mHeaderAPRFile = NULL; } void LLTextureCache::readEntriesHeader() { // mHeaderEntriesInfo initializes to default values so safe not to read it llassert_always(mHeaderAPRFile == NULL); if (LLAPRFile::isExist(mHeaderEntriesFileName, getLocalAPRFilePool())) { LLAPRFile::readEx(mHeaderEntriesFileName, (U8*)&mHeaderEntriesInfo, 0, sizeof(EntriesInfo), getLocalAPRFilePool()); } else //create an empty entries header. { mHeaderEntriesInfo.mVersion = sHeaderCacheVersion ; mHeaderEntriesInfo.mEntries = 0 ; writeEntriesHeader() ; } } void LLTextureCache::writeEntriesHeader() { llassert_always(mHeaderAPRFile == NULL); if (!mReadOnly) { LLAPRFile::writeEx(mHeaderEntriesFileName, (U8*)&mHeaderEntriesInfo, 0, sizeof(EntriesInfo), getLocalAPRFilePool()); } } //mHeaderMutex is locked before calling this. S32 LLTextureCache::openAndReadEntry(const LLUUID& id, Entry& entry, bool create) { S32 idx = -1; id_map_t::iterator iter1 = mHeaderIDMap.find(id); if (iter1 != mHeaderIDMap.end()) { idx = iter1->second; } if (idx < 0) { if (create && !mReadOnly) { if (mHeaderEntriesInfo.mEntries < sCacheMaxEntries) { // Add an entry to the end of the list idx = mHeaderEntriesInfo.mEntries++; } else if (!mFreeList.empty()) { idx = *(mFreeList.begin()); mFreeList.erase(mFreeList.begin()); } else { // Look for a still valid entry in the LRU for (std::set<LLUUID>::iterator iter2 = mLRU.begin(); iter2 != mLRU.end();) { std::set<LLUUID>::iterator curiter2 = iter2++; LLUUID oldid = *curiter2; // Erase entry from LRU regardless mLRU.erase(curiter2); // Look up entry and use it if it is valid id_map_t::iterator iter3 = mHeaderIDMap.find(oldid); if (iter3 != mHeaderIDMap.end() && iter3->second >= 0) { idx = iter3->second; removeCachedTexture(oldid) ;//remove the existing cached texture to release the entry index. break; } } // if (idx < 0) at this point, we will rebuild the LRU // and retry if called from setHeaderCacheEntry(), // otherwise this shouldn't happen and will trigger an error } if (idx >= 0) { entry.mID = id ; entry.mImageSize = -1 ; //mark it is a brand-new entry. entry.mBodySize = 0 ; } } } else { // Remove this entry from the LRU if it exists mLRU.erase(id); // Read the entry idx_entry_map_t::iterator iter = mUpdatedEntryMap.find(idx) ; if(iter != mUpdatedEntryMap.end()) { entry = iter->second ; } else { readEntryFromHeaderImmediately(idx, entry) ; } if(entry.mImageSize <= entry.mBodySize)//it happens on 64-bit systems, do not know why { llwarns << "corrupted entry: " << id << " entry image size: " << entry.mImageSize << " entry body size: " << entry.mBodySize << llendl ; //erase this entry and the cached texture from the cache. std::string tex_filename = getTextureFileName(id); removeEntry(idx, entry, tex_filename) ; mUpdatedEntryMap.erase(idx) ; idx = -1 ; } } return idx; } //mHeaderMutex is locked before calling this. void LLTextureCache::writeEntryToHeaderImmediately(S32& idx, Entry& entry, bool write_header) { LLAPRFile* aprfile ; S32 bytes_written ; S32 offset = sizeof(EntriesInfo) + idx * sizeof(Entry); if(write_header) { aprfile = openHeaderEntriesFile(false, 0); bytes_written = aprfile->write((U8*)&mHeaderEntriesInfo, sizeof(EntriesInfo)) ; if(bytes_written != sizeof(EntriesInfo)) { clearCorruptedCache() ; //clear the cache. idx = -1 ;//mark the idx invalid. return ; } mHeaderAPRFile->seek(APR_SET, offset); } else { aprfile = openHeaderEntriesFile(false, offset); } bytes_written = aprfile->write((void*)&entry, (S32)sizeof(Entry)); if(bytes_written != sizeof(Entry)) { clearCorruptedCache() ; //clear the cache. idx = -1 ;//mark the idx invalid. return ; } closeHeaderEntriesFile(); mUpdatedEntryMap.erase(idx) ; } //mHeaderMutex is locked before calling this. void LLTextureCache::readEntryFromHeaderImmediately(S32& idx, Entry& entry) { S32 offset = sizeof(EntriesInfo) + idx * sizeof(Entry); LLAPRFile* aprfile = openHeaderEntriesFile(true, offset); S32 bytes_read = aprfile->read((void*)&entry, (S32)sizeof(Entry)); closeHeaderEntriesFile(); if(bytes_read != sizeof(Entry)) { clearCorruptedCache() ; //clear the cache. idx = -1 ;//mark the idx invalid. } } //mHeaderMutex is locked before calling this. //update an existing entry time stamp, delay writing. void LLTextureCache::updateEntryTimeStamp(S32 idx, Entry& entry) { static const U32 MAX_ENTRIES_WITHOUT_TIME_STAMP = (U32)(LLTextureCache::sCacheMaxEntries * 0.75f) ; if(mHeaderEntriesInfo.mEntries < MAX_ENTRIES_WITHOUT_TIME_STAMP) { return ; //there are enough empty entry index space, no need to stamp time. } if (idx >= 0) { if (!mReadOnly) { entry.mTime = time(NULL); mUpdatedEntryMap[idx] = entry ; } } } //update an existing entry, write to header file immediately. bool LLTextureCache::updateEntry(S32& idx, Entry& entry, S32 new_image_size, S32 new_data_size) { S32 new_body_size = llmax(0, new_data_size - TEXTURE_CACHE_ENTRY_SIZE) ; if(new_image_size == entry.mImageSize && new_body_size == entry.mBodySize) { return true ; //nothing changed. } else { bool purge = false ; lockHeaders() ; bool update_header = false ; if(entry.mImageSize < 0) //is a brand-new entry { mHeaderIDMap[entry.mID] = idx; mTexturesSizeMap[entry.mID] = new_body_size ; mTexturesSizeTotal += new_body_size ; // Update Header update_header = true ; } else if (entry.mBodySize != new_body_size) { //already in mHeaderIDMap. mTexturesSizeMap[entry.mID] = new_body_size ; mTexturesSizeTotal -= entry.mBodySize ; mTexturesSizeTotal += new_body_size ; } entry.mTime = time(NULL); entry.mImageSize = new_image_size ; entry.mBodySize = new_body_size ; writeEntryToHeaderImmediately(idx, entry, update_header) ; if (mTexturesSizeTotal > sCacheMaxTexturesSize) { purge = true; } unlockHeaders() ; if (purge) { mDoPurge = TRUE; } } return false ; } U32 LLTextureCache::openAndReadEntries(std::vector<Entry>& entries) { U32 num_entries = mHeaderEntriesInfo.mEntries; mHeaderIDMap.clear(); mTexturesSizeMap.clear(); mFreeList.clear(); mTexturesSizeTotal = 0; LLAPRFile* aprfile = NULL; if(mUpdatedEntryMap.empty()) { aprfile = openHeaderEntriesFile(true, (S32)sizeof(EntriesInfo)); } else //update the header file first. { aprfile = openHeaderEntriesFile(false, 0); updatedHeaderEntriesFile() ; if(!aprfile) { return 0; } aprfile->seek(APR_SET, (S32)sizeof(EntriesInfo)); } for (U32 idx=0; idx<num_entries; idx++) { Entry entry; S32 bytes_read = aprfile->read((void*)(&entry), (S32)sizeof(Entry)); if (bytes_read < sizeof(Entry)) { llwarns << "Corrupted header entries, failed at " << idx << " / " << num_entries << llendl; closeHeaderEntriesFile(); purgeAllTextures(false); return 0; } entries.push_back(entry); // llinfos << "ENTRY: " << entry.mTime << " TEX: " << entry.mID << " IDX: " << idx << " Size: " << entry.mImageSize << llendl; if(entry.mImageSize > entry.mBodySize) { mHeaderIDMap[entry.mID] = idx; mTexturesSizeMap[entry.mID] = entry.mBodySize; mTexturesSizeTotal += entry.mBodySize; } else { mFreeList.insert(idx); } } closeHeaderEntriesFile(); return num_entries; } void LLTextureCache::writeEntriesAndClose(const std::vector<Entry>& entries) { S32 num_entries = entries.size(); llassert_always(num_entries == mHeaderEntriesInfo.mEntries); if (!mReadOnly) { LLAPRFile* aprfile = openHeaderEntriesFile(false, (S32)sizeof(EntriesInfo)); for (S32 idx=0; idx<num_entries; idx++) { S32 bytes_written = aprfile->write((void*)(&entries[idx]), (S32)sizeof(Entry)); if(bytes_written != sizeof(Entry)) { clearCorruptedCache() ; //clear the cache. return ; } } closeHeaderEntriesFile(); } } void LLTextureCache::writeUpdatedEntries() { lockHeaders() ; if (!mReadOnly && !mUpdatedEntryMap.empty()) { openHeaderEntriesFile(false, 0); updatedHeaderEntriesFile() ; closeHeaderEntriesFile(); } unlockHeaders() ; } //mHeaderMutex is locked and mHeaderAPRFile is created before calling this. void LLTextureCache::updatedHeaderEntriesFile() { if (!mReadOnly && !mUpdatedEntryMap.empty() && mHeaderAPRFile) { //entriesInfo mHeaderAPRFile->seek(APR_SET, 0); S32 bytes_written = mHeaderAPRFile->write((U8*)&mHeaderEntriesInfo, sizeof(EntriesInfo)) ; if(bytes_written != sizeof(EntriesInfo)) { clearCorruptedCache() ; //clear the cache. return ; } //write each updated entry S32 entry_size = (S32)sizeof(Entry) ; S32 prev_idx = -1 ; S32 delta_idx ; for (idx_entry_map_t::iterator iter = mUpdatedEntryMap.begin(); iter != mUpdatedEntryMap.end(); ++iter) { delta_idx = iter->first - prev_idx - 1; prev_idx = iter->first ; if(delta_idx) { mHeaderAPRFile->seek(APR_CUR, delta_idx * entry_size); } bytes_written = mHeaderAPRFile->write((void*)(&iter->second), entry_size); if(bytes_written != entry_size) { clearCorruptedCache() ; //clear the cache. return ; } } mUpdatedEntryMap.clear() ; } } //---------------------------------------------------------------------------- // Called from either the main thread or the worker thread void LLTextureCache::readHeaderCache() { mHeaderMutex.lock(); mLRU.clear(); // always clear the LRU readEntriesHeader(); if (mHeaderEntriesInfo.mVersion != sHeaderCacheVersion) { if (!mReadOnly) { purgeAllTextures(false); } } else { std::vector<Entry> entries; U32 num_entries = openAndReadEntries(entries); if (num_entries) { U32 empty_entries = 0; typedef std::pair<U32, S32> lru_data_t; std::set<lru_data_t> lru; std::set<U32> purge_list; for (U32 i=0; i<num_entries; i++) { Entry& entry = entries[i]; if (entry.mImageSize <= 0) { // This will be in the Free List, don't put it in the LRU ++empty_entries; } else { lru.insert(std::make_pair(entry.mTime, i)); if (entry.mBodySize > 0) { if (entry.mBodySize > entry.mImageSize) { // Shouldn't happen, failsafe only llwarns << "Bad entry: " << i << ": " << entry.mID << ": BodySize: " << entry.mBodySize << llendl; purge_list.insert(i); } } } } if (num_entries - empty_entries > sCacheMaxEntries) { // Special case: cache size was reduced, need to remove entries // Note: After we prune entries, we will call this again and create the LRU U32 entries_to_purge = (num_entries - empty_entries) - sCacheMaxEntries; llinfos << "Texture Cache Entries: " << num_entries << " Max: " << sCacheMaxEntries << " Empty: " << empty_entries << " Purging: " << entries_to_purge << llendl; // We can exit the following loop with the given condition, since if we'd reach the end of the lru set we'd have: // purge_list.size() = lru.size() = num_entries - empty_entries = entries_to_purge + sCacheMaxEntries >= entries_to_purge // So, it's certain that iter will never reach lru.end() first. std::set<lru_data_t>::iterator iter = lru.begin(); while (purge_list.size() < entries_to_purge) { purge_list.insert(iter->second); ++iter; } } else { S32 lru_entries = (S32)((F32)sCacheMaxEntries * TEXTURE_CACHE_LRU_SIZE); for (std::set<lru_data_t>::iterator iter = lru.begin(); iter != lru.end(); ++iter) { mLRU.insert(entries[iter->second].mID); // llinfos << "LRU: " << iter->first << " : " << iter->second << llendl; if (--lru_entries <= 0) break; } } if (purge_list.size() > 0) { for (std::set<U32>::iterator iter = purge_list.begin(); iter != purge_list.end(); ++iter) { std::string tex_filename = getTextureFileName(entries[*iter].mID); removeEntry((S32)*iter, entries[*iter], tex_filename); } // If we removed any entries, we need to rebuild the entries list, // write the header, and call this again std::vector<Entry> new_entries; for (U32 i=0; i<num_entries; i++) { const Entry& entry = entries[i]; if (entry.mImageSize > 0) { new_entries.push_back(entry); } } llassert_always(new_entries.size() <= sCacheMaxEntries); mHeaderEntriesInfo.mEntries = new_entries.size(); writeEntriesHeader(); writeEntriesAndClose(new_entries); mHeaderMutex.unlock(); // unlock the mutex before calling again readHeaderCache(); // repeat with new entries file mHeaderMutex.lock(); } else { //entries are not changed, nothing here. } } } mHeaderMutex.unlock(); } ////////////////////////////////////////////////////////////////////////////// //the header mutex is locked before calling this. void LLTextureCache::clearCorruptedCache() { llwarns << "the texture cache is corrupted, need to be cleared." << llendl ; closeHeaderEntriesFile();//close possible file handler purgeAllTextures(false) ; //clear the cache. if (!mReadOnly) //regenerate the directory tree if not exists. { LLFile::mkdir(mTexturesDirName); const char* subdirs = "0123456789abcdef"; for (S32 i=0; i<16; i++) { std::string dirname = mTexturesDirName + gDirUtilp->getDirDelimiter() + subdirs[i]; LLFile::mkdir(dirname); } } return ; } void LLTextureCache::purgeAllTextures(bool purge_directories) { if (!mReadOnly) { const char* subdirs = "0123456789abcdef"; std::string delem = gDirUtilp->getDirDelimiter(); std::string mask = "*"; for (S32 i=0; i<16; i++) { std::string dirname = mTexturesDirName + delem + subdirs[i]; llinfos << "Deleting files in directory: " << dirname << llendl; gDirUtilp->deleteFilesInDir(dirname, mask); if (purge_directories) { LLFile::rmdir(dirname); } } if (purge_directories) { gDirUtilp->deleteFilesInDir(mTexturesDirName, mask); LLFile::rmdir(mTexturesDirName); } } mHeaderIDMap.clear(); mTexturesSizeMap.clear(); mTexturesSizeTotal = 0; mFreeList.clear(); mTexturesSizeTotal = 0; mUpdatedEntryMap.clear(); // Info with 0 entries mHeaderEntriesInfo.mVersion = sHeaderCacheVersion; mHeaderEntriesInfo.mEntries = 0; writeEntriesHeader(); llinfos << "The entire texture cache is cleared." << llendl ; } void LLTextureCache::purgeTextures(bool validate) { if (mReadOnly) { return; } if (!mThreaded) { // *FIX:Mani - watchdog off. LLAppViewer::instance()->pauseMainloopTimeout(); } LLMutexLock lock(&mHeaderMutex); llinfos << "TEXTURE CACHE: Purging." << llendl; // Read the entries list std::vector<Entry> entries; U32 num_entries = openAndReadEntries(entries); if (!num_entries) { return; // nothing to purge } // Use mTexturesSizeMap to collect UUIDs of textures with bodies typedef std::set<std::pair<U32,S32> > time_idx_set_t; std::set<std::pair<U32,S32> > time_idx_set; for (size_map_t::iterator iter1 = mTexturesSizeMap.begin(); iter1 != mTexturesSizeMap.end(); ++iter1) { if (iter1->second > 0) { id_map_t::iterator iter2 = mHeaderIDMap.find(iter1->first); if (iter2 != mHeaderIDMap.end()) { S32 idx = iter2->second; time_idx_set.insert(std::make_pair(entries[idx].mTime, idx)); // llinfos << "TIME: " << entries[idx].mTime << " TEX: " << entries[idx].mID << " IDX: " << idx << " Size: " << entries[idx].mImageSize << llendl; } else { llerrs << "mTexturesSizeMap / mHeaderIDMap corrupted." << llendl ; } } } // Validate 1/256th of the files on startup U32 validate_idx = 0; if (validate) { validate_idx = gSavedSettings.getU32("CacheValidateCounter"); U32 next_idx = (validate_idx + 1) % 256; gSavedSettings.setU32("CacheValidateCounter", next_idx); LL_DEBUGS("TextureCache") << "TEXTURE CACHE: Validating: " << validate_idx << LL_ENDL; } S64 cache_size = mTexturesSizeTotal; S64 purged_cache_size = (sCacheMaxTexturesSize * (S64)((1.f-TEXTURE_CACHE_PURGE_AMOUNT)*100)) / 100; S32 purge_count = 0; for (time_idx_set_t::iterator iter = time_idx_set.begin(); iter != time_idx_set.end(); ++iter) { S32 idx = iter->second; bool purge_entry = false; std::string filename = getTextureFileName(entries[idx].mID); if (cache_size >= purged_cache_size) { purge_entry = true; } else if (validate) { // make sure file exists and is the correct size U32 uuididx = entries[idx].mID.mData[0]; if (uuididx == validate_idx) { LL_DEBUGS("TextureCache") << "Validating: " << filename << "Size: " << entries[idx].mBodySize << LL_ENDL; S32 bodysize = LLAPRFile::size(filename, getLocalAPRFilePool()); if (bodysize != entries[idx].mBodySize) { LL_WARNS("TextureCache") << "TEXTURE CACHE BODY HAS BAD SIZE: " << bodysize << " != " << entries[idx].mBodySize << filename << LL_ENDL; purge_entry = true; } } } else { break; } if (purge_entry) { purge_count++; LL_DEBUGS("TextureCache") << "PURGING: " << filename << LL_ENDL; removeEntry(idx, entries[idx], filename) ; cache_size -= entries[idx].mBodySize; } } LL_DEBUGS("TextureCache") << "TEXTURE CACHE: Writing Entries: " << num_entries << LL_ENDL; writeEntriesAndClose(entries); // *FIX:Mani - watchdog back on. LLAppViewer::instance()->resumeMainloopTimeout(); LL_INFOS("TextureCache") << "TEXTURE CACHE:" << " PURGED: " << purge_count << " ENTRIES: " << num_entries << " CACHE SIZE: " << mTexturesSizeTotal / (1024 * 1024) << " MB" << llendl; } ////////////////////////////////////////////////////////////////////////////// // call lockWorkers() first! LLTextureCacheWorker* LLTextureCache::getReader(handle_t handle) { LLTextureCacheWorker* res = NULL; handle_map_t::iterator iter = mReaders.find(handle); if (iter != mReaders.end()) { res = iter->second; } return res; } LLTextureCacheWorker* LLTextureCache::getWriter(handle_t handle) { LLTextureCacheWorker* res = NULL; handle_map_t::iterator iter = mWriters.find(handle); if (iter != mWriters.end()) { res = iter->second; } return res; } ////////////////////////////////////////////////////////////////////////////// // Called from work thread // Reads imagesize from the header, updates timestamp S32 LLTextureCache::getHeaderCacheEntry(const LLUUID& id, Entry& entry) { LLMutexLock lock(&mHeaderMutex); S32 idx = openAndReadEntry(id, entry, false); if (idx >= 0) { updateEntryTimeStamp(idx, entry); // updates time } return idx; } // Writes imagesize to the header, updates timestamp S32 LLTextureCache::setHeaderCacheEntry(const LLUUID& id, Entry& entry, S32 imagesize, S32 datasize) { mHeaderMutex.lock(); S32 idx = openAndReadEntry(id, entry, true); mHeaderMutex.unlock(); if (idx >= 0) { updateEntry(idx, entry, imagesize, datasize); } if(idx < 0) // retry { readHeaderCache(); // We couldn't write an entry, so refresh the LRU mHeaderMutex.lock(); llassert_always(!mLRU.empty() || mHeaderEntriesInfo.mEntries < sCacheMaxEntries); mHeaderMutex.unlock(); idx = setHeaderCacheEntry(id, entry, imagesize, datasize); // assert above ensures no inf. recursion } return idx; } ////////////////////////////////////////////////////////////////////////////// // Calls from texture pipeline thread (i.e. LLTextureFetch) LLTextureCache::handle_t LLTextureCache::readFromCache(const std::string& filename, const LLUUID& id, U32 priority, S32 offset, S32 size, ReadResponder* responder) { // Note: checking to see if an entry exists can cause a stall, // so let the thread handle it LLMutexLock lock(&mWorkersMutex); LLTextureCacheWorker* worker = new LLTextureCacheLocalFileWorker(this, priority, filename, id, NULL, size, offset, 0, responder); handle_t handle = worker->read(); mReaders[handle] = worker; return handle; } LLTextureCache::handle_t LLTextureCache::readFromCache(const LLUUID& id, U32 priority, S32 offset, S32 size, ReadResponder* responder) { // Note: checking to see if an entry exists can cause a stall, // so let the thread handle it LLMutexLock lock(&mWorkersMutex); LLTextureCacheWorker* worker = new LLTextureCacheRemoteWorker(this, priority, id, NULL, size, offset, 0, responder); handle_t handle = worker->read(); mReaders[handle] = worker; return handle; } bool LLTextureCache::readComplete(handle_t handle, bool abort) { lockWorkers(); handle_map_t::iterator iter = mReaders.find(handle); LLTextureCacheWorker* worker = NULL; bool complete = false; if (iter != mReaders.end()) { worker = iter->second; complete = worker->complete(); if(!complete && abort) { abortRequest(handle, true) ; } } if (worker && (complete || abort)) { mReaders.erase(iter); unlockWorkers(); worker->scheduleDelete(); } else { unlockWorkers(); } return (complete || abort); } LLTextureCache::handle_t LLTextureCache::writeToCache(const LLUUID& id, U32 priority, U8* data, S32 datasize, S32 imagesize, WriteResponder* responder) { if (mReadOnly) { delete responder; return LLWorkerThread::nullHandle(); } if (mDoPurge) { // NOTE: This may cause an occasional hiccup, // but it really needs to be done on the control thread // (i.e. here) purgeTextures(false); mDoPurge = FALSE; } LLMutexLock lock(&mWorkersMutex); LLTextureCacheWorker* worker = new LLTextureCacheRemoteWorker(this, priority, id, data, datasize, 0, imagesize, responder); handle_t handle = worker->write(); mWriters[handle] = worker; return handle; } bool LLTextureCache::writeComplete(handle_t handle, bool abort) { lockWorkers(); handle_map_t::iterator iter = mWriters.find(handle); llassert(iter != mWriters.end()); if (iter != mWriters.end()) { LLTextureCacheWorker* worker = iter->second; if (worker->complete() || abort) { mWriters.erase(handle); unlockWorkers(); worker->scheduleDelete(); return true; } } unlockWorkers(); return false; } void LLTextureCache::prioritizeWrite(handle_t handle) { // Don't prioritize yet, we might be working on this now // which could create a deadlock LLMutexLock lock(&mListMutex); mPrioritizeWriteList.push_back(handle); } void LLTextureCache::addCompleted(Responder* responder, bool success) { LLMutexLock lock(&mListMutex); mCompletedList.push_back(std::make_pair(responder,success)); } ////////////////////////////////////////////////////////////////////////////// //called after mHeaderMutex is locked. void LLTextureCache::removeCachedTexture(const LLUUID& id) { if(mTexturesSizeMap.find(id) != mTexturesSizeMap.end()) { mTexturesSizeTotal -= mTexturesSizeMap[id] ; mTexturesSizeMap.erase(id); } mHeaderIDMap.erase(id); LLAPRFile::remove(getTextureFileName(id), getLocalAPRFilePool()); } //called after mHeaderMutex is locked. void LLTextureCache::removeEntry(S32 idx, Entry& entry, std::string& filename) { bool file_maybe_exists = true; // Always attempt to remove when idx is invalid. if(idx >= 0) //valid entry { if (entry.mBodySize == 0) // Always attempt to remove when mBodySize > 0. { if (LLAPRFile::isExist(filename, getLocalAPRFilePool())) // Sanity check. Shouldn't exist when body size is 0. { LL_WARNS("TextureCache") << "Entry has body size of zero but file " << filename << " exists. Deleting this file, too." << LL_ENDL; } else { file_maybe_exists = false; } } entry.mImageSize = -1; entry.mBodySize = 0; mHeaderIDMap.erase(entry.mID); mTexturesSizeMap.erase(entry.mID); mTexturesSizeTotal -= entry.mBodySize; mFreeList.insert(idx); } if (file_maybe_exists) { LLAPRFile::remove(filename, getLocalAPRFilePool()); } } bool LLTextureCache::removeFromCache(const LLUUID& id) { //llwarns << "Removing texture from cache: " << id << llendl; bool ret = false ; if (!mReadOnly) { lockHeaders() ; Entry entry; S32 idx = openAndReadEntry(id, entry, false); std::string tex_filename = getTextureFileName(id); removeEntry(idx, entry, tex_filename) ; if (idx >= 0) { writeEntryToHeaderImmediately(idx, entry); ret = true; } unlockHeaders() ; } return ret ; } ////////////////////////////////////////////////////////////////////////////// LLTextureCache::ReadResponder::ReadResponder() : mImageSize(0), mImageLocal(FALSE) { } void LLTextureCache::ReadResponder::setData(U8* data, S32 datasize, S32 imagesize, S32 imageformat, BOOL imagelocal) { if (mFormattedImage.notNull()) { llassert_always(mFormattedImage->getCodec() == imageformat); mFormattedImage->appendData(data, datasize); } else { mFormattedImage = LLImageFormatted::createFromType(imageformat); mFormattedImage->setData(data,datasize); } mImageSize = imagesize; mImageLocal = imagelocal; } //////////////////////////////////////////////////////////////////////////////