diff options
Diffstat (limited to 'indra/llfilesystem')
| -rw-r--r-- | indra/llfilesystem/lldir.cpp | 8 | ||||
| -rw-r--r-- | indra/llfilesystem/lldiskcache.cpp | 176 | ||||
| -rw-r--r-- | indra/llfilesystem/lldiskcache.h | 33 | ||||
| -rw-r--r-- | indra/llfilesystem/llfilesystem.cpp | 139 | ||||
| -rw-r--r-- | indra/llfilesystem/llfilesystem.h | 21 |
5 files changed, 135 insertions, 242 deletions
diff --git a/indra/llfilesystem/lldir.cpp b/indra/llfilesystem/lldir.cpp index 42e91963c1..7b03143053 100644 --- a/indra/llfilesystem/lldir.cpp +++ b/indra/llfilesystem/lldir.cpp @@ -201,15 +201,15 @@ U32 LLDir::deleteDirAndContents(const std::string& dir_name) boost::filesystem::path dir_path(dir_name); #endif - if (boost::filesystem::exists (dir_path)) + if (boost::filesystem::exists(dir_path)) { - if (!boost::filesystem::is_empty (dir_path)) + if (!boost::filesystem::is_empty(dir_path)) { // Directory has content - num_deleted = boost::filesystem::remove_all (dir_path); + num_deleted = (U32)boost::filesystem::remove_all(dir_path); } else { // Directory is empty - boost::filesystem::remove (dir_path); + boost::filesystem::remove(dir_path); } } } diff --git a/indra/llfilesystem/lldiskcache.cpp b/indra/llfilesystem/lldiskcache.cpp index da2e960ed3..49904911a9 100644 --- a/indra/llfilesystem/lldiskcache.cpp +++ b/indra/llfilesystem/lldiskcache.cpp @@ -39,15 +39,25 @@ #include "lldiskcache.h" -LLDiskCache::LLDiskCache(const std::string cache_dir, + /** + * The prefix inserted at the start of a cache file filename to + * help identify it as a cache file. It's probably not required + * (just the presence in the cache folder is enough) but I am + * paranoid about the cache folder being set to something bad + * like the users' OS system dir by mistake or maliciously and + * this will help to offset any damage if that happens. + */ +static const std::string CACHE_FILENAME_PREFIX("sl_cache"); + +std::string LLDiskCache::sCacheDir; + +LLDiskCache::LLDiskCache(const std::string& cache_dir, const uintmax_t max_size_bytes, const bool enable_cache_debug_info) : - mCacheDir(cache_dir), mMaxSizeBytes(max_size_bytes), mEnableCacheDebugInfo(enable_cache_debug_info) { - mCacheFilenamePrefix = "sl_cache"; - + sCacheDir = cache_dir; LLFile::mkdir(cache_dir); } @@ -83,7 +93,7 @@ void LLDiskCache::purge() { if (mEnableCacheDebugInfo) { - LL_INFOS() << "Total dir size before purge is " << dirFileSize(mCacheDir) << LL_ENDL; + LL_INFOS() << "Total dir size before purge is " << dirFileSize(sCacheDir) << LL_ENDL; } boost::system::error_code ec; @@ -93,9 +103,9 @@ void LLDiskCache::purge() std::vector<file_info_t> file_info; #if LL_WINDOWS - std::wstring cache_path(utf8str_to_utf16str(mCacheDir)); + std::wstring cache_path(utf8str_to_utf16str(sCacheDir)); #else - std::string cache_path(mCacheDir); + std::string cache_path(sCacheDir); #endif if (boost::filesystem::is_directory(cache_path, ec) && !ec.failed()) { @@ -104,7 +114,7 @@ void LLDiskCache::purge() { if (boost::filesystem::is_regular_file(*iter, ec) && !ec.failed()) { - if ((*iter).path().string().find(mCacheFilenamePrefix) != std::string::npos) + if ((*iter).path().string().find(CACHE_FILENAME_PREFIX) != std::string::npos) { uintmax_t file_size = boost::filesystem::file_size(*iter, ec); if (ec.failed()) @@ -181,152 +191,22 @@ void LLDiskCache::purge() LL_INFOS() << line.str() << LL_ENDL; } - LL_INFOS() << "Total dir size after purge is " << dirFileSize(mCacheDir) << LL_ENDL; + LL_INFOS() << "Total dir size after purge is " << dirFileSize(sCacheDir) << LL_ENDL; LL_INFOS() << "Cache purge took " << execute_time << " ms to execute for " << file_info.size() << " files" << LL_ENDL; } } -const std::string LLDiskCache::assetTypeToString(LLAssetType::EType at) -{ - /** - * Make use of the handy C++17 feature that allows - * for inline initialization of an std::map<> - */ - typedef std::map<LLAssetType::EType, std::string> asset_type_to_name_t; - asset_type_to_name_t asset_type_to_name = - { - { LLAssetType::AT_TEXTURE, "TEXTURE" }, - { LLAssetType::AT_SOUND, "SOUND" }, - { LLAssetType::AT_CALLINGCARD, "CALLINGCARD" }, - { LLAssetType::AT_LANDMARK, "LANDMARK" }, - { LLAssetType::AT_SCRIPT, "SCRIPT" }, - { LLAssetType::AT_CLOTHING, "CLOTHING" }, - { LLAssetType::AT_OBJECT, "OBJECT" }, - { LLAssetType::AT_NOTECARD, "NOTECARD" }, - { LLAssetType::AT_CATEGORY, "CATEGORY" }, - { LLAssetType::AT_LSL_TEXT, "LSL_TEXT" }, - { LLAssetType::AT_LSL_BYTECODE, "LSL_BYTECODE" }, - { LLAssetType::AT_TEXTURE_TGA, "TEXTURE_TGA" }, - { LLAssetType::AT_BODYPART, "BODYPART" }, - { LLAssetType::AT_SOUND_WAV, "SOUND_WAV" }, - { LLAssetType::AT_IMAGE_TGA, "IMAGE_TGA" }, - { LLAssetType::AT_IMAGE_JPEG, "IMAGE_JPEG" }, - { LLAssetType::AT_ANIMATION, "ANIMATION" }, - { LLAssetType::AT_GESTURE, "GESTURE" }, - { LLAssetType::AT_SIMSTATE, "SIMSTATE" }, - { LLAssetType::AT_LINK, "LINK" }, - { LLAssetType::AT_LINK_FOLDER, "LINK_FOLDER" }, - { LLAssetType::AT_MARKETPLACE_FOLDER, "MARKETPLACE_FOLDER" }, - { LLAssetType::AT_WIDGET, "WIDGET" }, - { LLAssetType::AT_PERSON, "PERSON" }, - { LLAssetType::AT_MESH, "MESH" }, - { LLAssetType::AT_SETTINGS, "SETTINGS" }, - { LLAssetType::AT_MATERIAL, "MATERIAL" }, - { LLAssetType::AT_GLTF, "GLTF" }, - { LLAssetType::AT_GLTF_BIN, "GLTF_BIN" }, - { LLAssetType::AT_UNKNOWN, "UNKNOWN" } - }; - - asset_type_to_name_t::iterator iter = asset_type_to_name.find(at); - if (iter != asset_type_to_name.end()) - { - return iter->second; - } - - return std::string("UNKNOWN"); -} - -const std::string LLDiskCache::metaDataToFilepath(const std::string id, - LLAssetType::EType at, - const std::string extra_info) +const std::string LLDiskCache::metaDataToFilepath(const LLUUID& id, LLAssetType::EType at) { - std::ostringstream file_path; - - file_path << mCacheDir; - file_path << gDirUtilp->getDirDelimiter(); - file_path << mCacheFilenamePrefix; - file_path << "_"; - file_path << id; - file_path << "_"; - file_path << (extra_info.empty() ? "0" : extra_info); - //file_path << "_"; - //file_path << assetTypeToString(at); // see SL-14210 Prune descriptive tag from new cache filenames - // for details of why it was removed. Note that if you put it - // back or change the format of the filename, the cache files - // files will be invalidated (and perhaps, more importantly, - // never deleted unless you delete them manually). - file_path << ".asset"; - - return file_path.str(); -} - -void LLDiskCache::updateFileAccessTime(const std::string file_path) -{ - /** - * Threshold in time_t units that is used to decide if the last access time - * time of the file is updated or not. Added as a precaution for the concern - * outlined in SL-14582 about frequent writes on older SSDs reducing their - * lifespan. I think this is the right place for the threshold value - rather - * than it being a pref - do comment on that Jira if you disagree... - * - * Let's start with 1 hour in time_t units and see how that unfolds - */ - const std::time_t time_threshold = 1 * 60 * 60; - - // current time - const std::time_t cur_time = std::time(nullptr); - - boost::system::error_code ec; -#if LL_WINDOWS - // file last write time - const std::time_t last_write_time = boost::filesystem::last_write_time(utf8str_to_utf16str(file_path), ec); - if (ec.failed()) - { - LL_WARNS() << "Failed to read last write time for cache file " << file_path << ": " << ec.message() << LL_ENDL; - return; - } - - // delta between cur time and last time the file was written - const std::time_t delta_time = cur_time - last_write_time; - - // we only write the new value if the time in time_threshold has elapsed - // before the last one - if (delta_time > time_threshold) - { - boost::filesystem::last_write_time(utf8str_to_utf16str(file_path), cur_time, ec); - } -#else - // file last write time - const std::time_t last_write_time = boost::filesystem::last_write_time(file_path, ec); - if (ec.failed()) - { - LL_WARNS() << "Failed to read last write time for cache file " << file_path << ": " << ec.message() << LL_ENDL; - return; - } - - // delta between cur time and last time the file was written - const std::time_t delta_time = cur_time - last_write_time; - - // we only write the new value if the time in time_threshold has elapsed - // before the last one - if (delta_time > time_threshold) - { - boost::filesystem::last_write_time(file_path, cur_time, ec); - } -#endif - - if (ec.failed()) - { - LL_WARNS() << "Failed to update last write time for cache file " << file_path << ": " << ec.message() << LL_ENDL; - } + return llformat("%s%s%s_%s_0.asset", sCacheDir.c_str(), gDirUtilp->getDirDelimiter().c_str(), CACHE_FILENAME_PREFIX.c_str(), id.asString().c_str()); } const std::string LLDiskCache::getCacheInfo() { std::ostringstream cache_info; - F32 max_in_mb = (F32)mMaxSizeBytes / (1024.0 * 1024.0); - F32 percent_used = ((F32)dirFileSize(mCacheDir) / (F32)mMaxSizeBytes) * 100.0; + F32 max_in_mb = (F32)mMaxSizeBytes / (1024.0f * 1024.0f); + F32 percent_used = ((F32)dirFileSize(sCacheDir) / (F32)mMaxSizeBytes) * 100.0f; cache_info << std::fixed; cache_info << std::setprecision(1); @@ -346,9 +226,9 @@ void LLDiskCache::clearCache() */ boost::system::error_code ec; #if LL_WINDOWS - std::wstring cache_path(utf8str_to_utf16str(mCacheDir)); + std::wstring cache_path(utf8str_to_utf16str(sCacheDir)); #else - std::string cache_path(mCacheDir); + std::string cache_path(sCacheDir); #endif if (boost::filesystem::is_directory(cache_path, ec) && !ec.failed()) { @@ -357,7 +237,7 @@ void LLDiskCache::clearCache() { if (boost::filesystem::is_regular_file(*iter, ec) && !ec.failed()) { - if ((*iter).path().string().find(mCacheFilenamePrefix) != std::string::npos) + if ((*iter).path().string().find(CACHE_FILENAME_PREFIX) != std::string::npos) { boost::filesystem::remove(*iter, ec); if (ec.failed()) @@ -405,7 +285,7 @@ void LLDiskCache::removeOldVFSFiles() } } -uintmax_t LLDiskCache::dirFileSize(const std::string dir) +uintmax_t LLDiskCache::dirFileSize(const std::string& dir) { uintmax_t total_file_size = 0; @@ -431,7 +311,7 @@ uintmax_t LLDiskCache::dirFileSize(const std::string dir) { if (boost::filesystem::is_regular_file(*iter, ec) && !ec.failed()) { - if ((*iter).path().string().find(mCacheFilenamePrefix) != std::string::npos) + if ((*iter).path().string().find(CACHE_FILENAME_PREFIX) != std::string::npos) { uintmax_t file_size = boost::filesystem::file_size(*iter, ec); if (!ec.failed()) diff --git a/indra/llfilesystem/lldiskcache.h b/indra/llfilesystem/lldiskcache.h index b60e74f8c9..f07b26c2d7 100644 --- a/indra/llfilesystem/lldiskcache.h +++ b/indra/llfilesystem/lldiskcache.h @@ -81,7 +81,7 @@ class LLDiskCache : * a child of the main Viewer cache directory. Defined * by the setting at 'DiskCacheDirName' */ - const std::string cache_dir, + const std::string& cache_dir, /** * The maximum size of the cache in bytes - Based on the * setting at 'CacheSize' and 'DiskCachePercentOfTotal' @@ -104,16 +104,7 @@ class LLDiskCache : * so many things had to be pushed back there to accomodate it, that I * decided to move it here. Still not sure that's completely right. */ - const std::string metaDataToFilepath(const std::string id, - LLAssetType::EType at, - const std::string extra_info); - - /** - * Update the "last write time" of a file to "now". This must be called whenever a - * file in the cache is read (not written) so that the last time the file was - * accessed is up to date (This is used in the mechanism for purging the cache) - */ - void updateFileAccessTime(const std::string file_path); + static const std::string metaDataToFilepath(const LLUUID& id, LLAssetType::EType at); /** * Purge the oldest items in the cache so that the combined size of all files @@ -148,13 +139,7 @@ class LLDiskCache : * directory. Primarily used here to determine the directory size * before and after the cache purge */ - uintmax_t dirFileSize(const std::string dir); - - /** - * Utility function to convert an LLAssetType enum into a - * string that we use as part of the cache file filename - */ - const std::string assetTypeToString(LLAssetType::EType at); + uintmax_t dirFileSize(const std::string& dir); private: /** @@ -170,17 +155,7 @@ class LLDiskCache : * setting could potentially point it at a non-cache directory (for example, * the Windows System dir) with disastrous results. */ - std::string mCacheDir; - - /** - * The prefix inserted at the start of a cache file filename to - * help identify it as a cache file. It's probably not required - * (just the presence in the cache folder is enough) but I am - * paranoid about the cache folder being set to something bad - * like the users' OS system dir by mistake or maliciously and - * this will help to offset any damage if that happens. - */ - std::string mCacheFilenamePrefix; + static std::string sCacheDir; /** * When enabled, displays additional debugging information in diff --git a/indra/llfilesystem/llfilesystem.cpp b/indra/llfilesystem/llfilesystem.cpp index 235aae0be3..c8ce9531c2 100644 --- a/indra/llfilesystem/llfilesystem.cpp +++ b/indra/llfilesystem/llfilesystem.cpp @@ -34,10 +34,12 @@ #include "llfasttimer.h" #include "lldiskcache.h" -const S32 LLFileSystem::READ = 0x00000001; -const S32 LLFileSystem::WRITE = 0x00000002; -const S32 LLFileSystem::READ_WRITE = 0x00000003; // LLFileSystem::READ & LLFileSystem::WRITE -const S32 LLFileSystem::APPEND = 0x00000006; // 0x00000004 & LLFileSystem::WRITE +#include "boost/filesystem.hpp" + +constexpr S32 LLFileSystem::READ = 0x00000001; +constexpr S32 LLFileSystem::WRITE = 0x00000002; +constexpr S32 LLFileSystem::READ_WRITE = 0x00000003; // LLFileSystem::READ & LLFileSystem::WRITE +constexpr S32 LLFileSystem::APPEND = 0x00000006; // 0x00000004 & LLFileSystem::WRITE static LLTrace::BlockTimerStatHandle FTM_VFILE_WAIT("VFile Wait"); @@ -55,10 +57,7 @@ LLFileSystem::LLFileSystem(const LLUUID& file_id, const LLAssetType::EType file_ if (mode == LLFileSystem::READ) { // build the filename (TODO: we do this in a few places - perhaps we should factor into a single function) - std::string id; - mFileID.toString(id); - const std::string extra_info = ""; - const std::string filename = LLDiskCache::getInstance()->metaDataToFilepath(id, mFileType, extra_info); + const std::string filename = LLDiskCache::metaDataToFilepath(mFileID, mFileType); // update the last access time for the file if it exists - this is required // even though we are reading and not writing because this is the @@ -67,22 +66,16 @@ LLFileSystem::LLFileSystem(const LLUUID& file_id, const LLAssetType::EType file_ bool exists = gDirUtilp->fileExists(filename); if (exists) { - LLDiskCache::getInstance()->updateFileAccessTime(filename); + updateFileAccessTime(filename); } } } -LLFileSystem::~LLFileSystem() -{ -} - // static bool LLFileSystem::getExists(const LLUUID& file_id, const LLAssetType::EType file_type) { - std::string id_str; - file_id.toString(id_str); - const std::string extra_info = ""; - const std::string filename = LLDiskCache::getInstance()->metaDataToFilepath(id_str, file_type, extra_info); + LL_PROFILE_ZONE_SCOPED; + const std::string filename = LLDiskCache::metaDataToFilepath(file_id, file_type); llifstream file(filename, std::ios::binary); if (file.is_open()) @@ -96,10 +89,7 @@ bool LLFileSystem::getExists(const LLUUID& file_id, const LLAssetType::EType fil // static bool LLFileSystem::removeFile(const LLUUID& file_id, const LLAssetType::EType file_type, int suppress_error /*= 0*/) { - std::string id_str; - file_id.toString(id_str); - const std::string extra_info = ""; - const std::string filename = LLDiskCache::getInstance()->metaDataToFilepath(id_str, file_type, extra_info); + const std::string filename = LLDiskCache::metaDataToFilepath(file_id, file_type); LLFile::remove(filename.c_str(), suppress_error); @@ -110,14 +100,8 @@ bool LLFileSystem::removeFile(const LLUUID& file_id, const LLAssetType::EType fi bool LLFileSystem::renameFile(const LLUUID& old_file_id, const LLAssetType::EType old_file_type, const LLUUID& new_file_id, const LLAssetType::EType new_file_type) { - std::string old_id_str; - old_file_id.toString(old_id_str); - const std::string extra_info = ""; - const std::string old_filename = LLDiskCache::getInstance()->metaDataToFilepath(old_id_str, old_file_type, extra_info); - - std::string new_id_str; - new_file_id.toString(new_id_str); - const std::string new_filename = LLDiskCache::getInstance()->metaDataToFilepath(new_id_str, new_file_type, extra_info); + const std::string old_filename = LLDiskCache::metaDataToFilepath(old_file_id, old_file_type); + const std::string new_filename = LLDiskCache::metaDataToFilepath(new_file_id, new_file_type); // Rename needs the new file to not exist. LLFileSystem::removeFile(new_file_id, new_file_type, ENOENT); @@ -128,7 +112,7 @@ bool LLFileSystem::renameFile(const LLUUID& old_file_id, const LLAssetType::ETyp // failed but the original code does not and doing so seems to // break a lot of things so we go with the flow... //return false; - LL_WARNS() << "Failed to rename " << old_file_id << " to " << new_id_str << " reason: " << strerror(errno) << LL_ENDL; + LL_WARNS() << "Failed to rename " << old_file_id << " to " << new_file_id << " reason: " << strerror(errno) << LL_ENDL; } return true; @@ -137,17 +121,14 @@ bool LLFileSystem::renameFile(const LLUUID& old_file_id, const LLAssetType::ETyp // static S32 LLFileSystem::getFileSize(const LLUUID& file_id, const LLAssetType::EType file_type) { - std::string id_str; - file_id.toString(id_str); - const std::string extra_info = ""; - const std::string filename = LLDiskCache::getInstance()->metaDataToFilepath(id_str, file_type, extra_info); + const std::string filename = LLDiskCache::metaDataToFilepath(file_id, file_type); S32 file_size = 0; llifstream file(filename, std::ios::binary); if (file.is_open()) { file.seekg(0, std::ios::end); - file_size = file.tellg(); + file_size = (S32)file.tellg(); } return file_size; @@ -157,10 +138,7 @@ bool LLFileSystem::read(U8* buffer, S32 bytes) { bool success = false; - std::string id; - mFileID.toString(id); - const std::string extra_info = ""; - const std::string filename = LLDiskCache::getInstance()->metaDataToFilepath(id, mFileType, extra_info); + const std::string filename = LLDiskCache::metaDataToFilepath(mFileID, mFileType); llifstream file(filename, std::ios::binary); if (file.is_open()) @@ -175,7 +153,7 @@ bool LLFileSystem::read(U8* buffer, S32 bytes) } else { - mBytesRead = file.gcount(); + mBytesRead = (S32)file.gcount(); } file.close(); @@ -190,22 +168,19 @@ bool LLFileSystem::read(U8* buffer, S32 bytes) return success; } -S32 LLFileSystem::getLastBytesRead() +S32 LLFileSystem::getLastBytesRead() const { return mBytesRead; } -bool LLFileSystem::eof() +bool LLFileSystem::eof() const { return mPosition >= getSize(); } bool LLFileSystem::write(const U8* buffer, S32 bytes) { - std::string id_str; - mFileID.toString(id_str); - const std::string extra_info = ""; - const std::string filename = LLDiskCache::getInstance()->metaDataToFilepath(id_str, mFileType, extra_info); + const std::string filename = LLDiskCache::metaDataToFilepath(mFileID, mFileType); bool success = false; @@ -216,12 +191,11 @@ bool LLFileSystem::write(const U8* buffer, S32 bytes) { ofs.write((const char*)buffer, bytes); - mPosition = ofs.tellp(); // <FS:Ansariel> Fix asset caching + mPosition = (S32)ofs.tellp(); success = true; } } - // <FS:Ansariel> Fix asset caching else if (mMode == READ_WRITE) { // Don't truncate if file already exists @@ -245,7 +219,6 @@ bool LLFileSystem::write(const U8* buffer, S32 bytes) } } } - // </FS:Ansariel> else { llofstream ofs(filename, std::ios::binary); @@ -297,12 +270,12 @@ S32 LLFileSystem::tell() const return mPosition; } -S32 LLFileSystem::getSize() +S32 LLFileSystem::getSize() const { return LLFileSystem::getFileSize(mFileID, mFileType); } -S32 LLFileSystem::getMaxSize() +S32 LLFileSystem::getMaxSize() const { // offer up a huge size since we don't care what the max is return INT_MAX; @@ -318,9 +291,69 @@ bool LLFileSystem::rename(const LLUUID& new_id, const LLAssetType::EType new_typ return true; } -bool LLFileSystem::remove() +bool LLFileSystem::remove() const { LLFileSystem::removeFile(mFileID, mFileType); - return true; } + +void LLFileSystem::updateFileAccessTime(const std::string& file_path) +{ + /** + * Threshold in time_t units that is used to decide if the last access time + * time of the file is updated or not. Added as a precaution for the concern + * outlined in SL-14582 about frequent writes on older SSDs reducing their + * lifespan. I think this is the right place for the threshold value - rather + * than it being a pref - do comment on that Jira if you disagree... + * + * Let's start with 1 hour in time_t units and see how that unfolds + */ + constexpr std::time_t time_threshold = 1 * 60 * 60; + + // current time + const std::time_t cur_time = std::time(nullptr); + + boost::system::error_code ec; +#if LL_WINDOWS + // file last write time + const std::time_t last_write_time = boost::filesystem::last_write_time(utf8str_to_utf16str(file_path), ec); + if (ec.failed()) + { + LL_WARNS() << "Failed to read last write time for cache file " << file_path << ": " << ec.message() << LL_ENDL; + return; + } + + // delta between cur time and last time the file was written + const std::time_t delta_time = cur_time - last_write_time; + + // we only write the new value if the time in time_threshold has elapsed + // before the last one + if (delta_time > time_threshold) + { + boost::filesystem::last_write_time(utf8str_to_utf16str(file_path), cur_time, ec); + } +#else + // file last write time + const std::time_t last_write_time = boost::filesystem::last_write_time(file_path, ec); + if (ec.failed()) + { + LL_WARNS() << "Failed to read last write time for cache file " << file_path << ": " << ec.message() << LL_ENDL; + return; + } + + // delta between cur time and last time the file was written + const std::time_t delta_time = cur_time - last_write_time; + + // we only write the new value if the time in time_threshold has elapsed + // before the last one + if (delta_time > time_threshold) + { + boost::filesystem::last_write_time(file_path, cur_time, ec); + } +#endif + + if (ec.failed()) + { + LL_WARNS() << "Failed to update last write time for cache file " << file_path << ": " << ec.message() << LL_ENDL; + } +} diff --git a/indra/llfilesystem/llfilesystem.h b/indra/llfilesystem/llfilesystem.h index ea1b9cf3a1..10649b6920 100644 --- a/indra/llfilesystem/llfilesystem.h +++ b/indra/llfilesystem/llfilesystem.h @@ -38,20 +38,27 @@ class LLFileSystem { public: LLFileSystem(const LLUUID& file_id, const LLAssetType::EType file_type, S32 mode = LLFileSystem::READ); - ~LLFileSystem(); + ~LLFileSystem() = default; bool read(U8* buffer, S32 bytes); - S32 getLastBytesRead(); - bool eof(); + S32 getLastBytesRead() const; + bool eof() const; bool write(const U8* buffer, S32 bytes); bool seek(S32 offset, S32 origin = -1); S32 tell() const; - S32 getSize(); - S32 getMaxSize(); + S32 getSize() const; + S32 getMaxSize() const; bool rename(const LLUUID& new_id, const LLAssetType::EType new_type); - bool remove(); + bool remove() const; + + /** + * Update the "last write time" of a file to "now". This must be called whenever a + * file in the cache is read (not written) so that the last time the file was + * accessed is up to date (This is used in the mechanism for purging the cache) + */ + void updateFileAccessTime(const std::string& file_path); static bool getExists(const LLUUID& file_id, const LLAssetType::EType file_type); static bool removeFile(const LLUUID& file_id, const LLAssetType::EType file_type, int suppress_error = 0); @@ -71,8 +78,6 @@ class LLFileSystem S32 mPosition; S32 mMode; S32 mBytesRead; -//private: -// static const std::string idToFilepath(const std::string id, LLAssetType::EType at); }; #endif // LL_FILESYSTEM_H |