void LLTextureCache::purgeCache(ELLPath location)
{
if (!mReadOnly)
{
setDirNames(location);
ll_apr_file_remove(mHeaderEntriesFileName, NULL);
ll_apr_file_remove(mHeaderDataFileName, NULL);
}
purgeAllTextures(true);
}
void LLTextureCache::purgeCache(ELLPath location)
{
LLMutexLock lock(&mHeaderMutex);
if (!mReadOnly)
{
setDirNames(location);
llassert_always(mHeaderAPRFile == NULL);
LLAPRFile::remove(mHeaderEntriesFileName);
LLAPRFile::remove(mHeaderDataFileName);
}
purgeAllTextures(true);
}
U32 LLTextureCache::openAndReadEntries(std::vector<Entry>& entries)
{
U32 num_entries = mHeaderEntriesInfo.mEntries;
mHeaderIDMap.clear();
mTexturesSizeMap.clear();
mFreeList.clear();
mTexturesSizeTotal = 0;
LLAPRFile* aprfile = openHeaderEntriesFile(false, (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 < 0)
{
mFreeList.insert(idx);
}
else
{
mHeaderIDMap[entry.mID] = idx;
if (entry.mBodySize > 0)
{
mTexturesSizeMap[entry.mID] = entry.mBodySize;
mTexturesSizeTotal += entry.mBodySize;
}
llassert_always(entry.mImageSize == 0 || entry.mImageSize > entry.mBodySize);
}
}
closeHeaderEntriesFile();
return num_entries;
}
void LLTextureCache::purgeTextures(bool validate)
{
if (mReadOnly)
{
return;
}
// *FIX:Mani - watchdog off.
LLAppViewer::instance()->pauseMainloopTimeout();
LLMutexLock lock(&mHeaderMutex);
S32 filesize = ll_apr_file_size(mTexturesDirEntriesFileName, NULL);
S32 num_entries = filesize / sizeof(Entry);
if (num_entries * (S32)sizeof(Entry) != filesize)
{
LL_WARNS("TextureCache") << "Bad cache file: " << mTexturesDirEntriesFileName << " Purging." << LL_ENDL;
purgeAllTextures(false);
return;
}
if (num_entries == 0)
{
return; // nothing to do
}
Entry* entries = new Entry[num_entries];
S32 bytes_read = ll_apr_file_read_ex(mTexturesDirEntriesFileName, NULL,
(U8*)entries, 0, num_entries*sizeof(Entry));
if (bytes_read != filesize)
{
LL_WARNS("TextureCache") << "Bad cache file (2): " << mTexturesDirEntriesFileName << " Purging." << LL_ENDL;
purgeAllTextures(false);
return;
}
LL_DEBUGS("TextureCache") << "TEXTURE CACHE: Reading " << num_entries << " Entries from " << mTexturesDirEntriesFileName << LL_ENDL;
std::map<LLUUID, S32> entry_idx_map;
S64 total_size = 0;
for (S32 idx=0; idx<num_entries; idx++)
{
const LLUUID& id = entries[idx].mID;
LL_DEBUGS("TextureCache") << "Entry: " << id << " Size: " << entries[idx].mSize << " Time: " << entries[idx].mTime << LL_ENDL;
std::map<LLUUID, S32>::iterator iter = entry_idx_map.find(id);
if (iter != entry_idx_map.end())
{
// Newer entry replacing older entry
S32 pidx = iter->second;
total_size -= entries[pidx].mSize;
entries[pidx].mSize = 0; // flag: skip older entry
}
entry_idx_map[id] = idx;
total_size += entries[idx].mSize;
}
U32 validate_idx = 0;
if (validate)
{
validate_idx = gSavedSettings.getU32("CacheValidateCounter");
U32 next_idx = (++validate_idx) % 256;
gSavedSettings.setU32("CacheValidateCounter", next_idx);
LL_DEBUGS("TextureCache") << "TEXTURE CACHE: Validating: " << validate_idx << LL_ENDL;
}
S64 min_cache_size = sCacheMaxTexturesSize / 100 * 95;
S32 purge_count = 0;
S32 next_idx = 0;
for (S32 idx=0; idx<num_entries; idx++)
{
if (entries[idx].mSize == 0)
{
continue;
}
bool purge_entry = false;
std::string filename = getTextureFileName(entries[idx].mID);
if (total_size >= min_cache_size)
{
purge_entry = true;
}
else if (validate)
{
// make sure file exists and is the correct size
S32 uuididx = entries[idx].mID.mData[0];
if (uuididx == validate_idx)
{
LL_DEBUGS("TextureCache") << "Validating: " << filename << "Size: " << entries[idx].mSize << LL_ENDL;
S32 bodysize = ll_apr_file_size(filename, NULL);
if (bodysize != entries[idx].mSize)
{
LL_WARNS("TextureCache") << "TEXTURE CACHE BODY HAS BAD SIZE: " << bodysize << " != " << entries[idx].mSize
<< filename << LL_ENDL;
purge_entry = true;
}
}
}
if (purge_entry)
{
purge_count++;
LL_DEBUGS("TextureCache") << "PURGING: " << filename << LL_ENDL;
mFilesToDelete.push_back(filename);
total_size -= entries[idx].mSize;
entries[idx].mSize = 0;
}
else
{
if (next_idx != idx)
{
entries[next_idx] = entries[idx];
}
++next_idx;
}
}
num_entries = next_idx;
mTimeLastFileDelete.reset();
LL_DEBUGS("TextureCache") << "TEXTURE CACHE: Writing Entries: "
<< num_entries << " (" << num_entries*sizeof(Entry)/1024 << "KB)"
<< LL_ENDL;
ll_apr_file_remove(mTexturesDirEntriesFileName, NULL);
ll_apr_file_write_ex(mTexturesDirEntriesFileName, NULL,
(U8*)&entries[0], 0, num_entries*sizeof(Entry));
mTexturesSizeTotal = 0;
mTexturesSizeMap.clear();
for (S32 idx=0; idx<num_entries; idx++)
{
mTexturesSizeMap[entries[idx].mID] = entries[idx].mSize;
mTexturesSizeTotal += entries[idx].mSize;
}
llassert(mTexturesSizeTotal == total_size);
delete[] entries;
// *FIX:Mani - watchdog back on.
LLAppViewer::instance()->resumeMainloopTimeout();
LL_INFOS("TextureCache") << "TEXTURE CACHE:"
<< " PURGED: " << purge_count
<< " ENTRIES: " << num_entries
<< " CACHE SIZE: " << total_size/1024/1024 << " MB"
<< llendl;
}
// 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, LLUUID> lru_data_t;
std::set<lru_data_t> lru;
std::set<LLUUID> purge_list;
for (U32 i=0; i<num_entries; i++)
{
Entry& entry = entries[i];
const LLUUID& id = entry.mID;
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, id));
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(id);
}
}
}
}
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
for (std::set<lru_data_t>::iterator iter = lru.begin(); purge_list.size() < entries_to_purge; ++iter)
{
purge_list.insert(iter->second);
}
llassert_always(purge_list.size() >= entries_to_purge);
}
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(iter->second);
// llinfos << "LRU: " << iter->first << " : " << iter->second << llendl;
if (--lru_entries <= 0)
break;
}
}
if (purge_list.size() > 0)
{
for (std::set<LLUUID>::iterator iter = purge_list.begin(); iter != purge_list.end(); ++iter)
{
removeFromCacheLocked(*iter);
}
// 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
return;
}
else
{
//entries are not changed, nothing here.
}
}
}
mHeaderMutex.unlock();
}