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Change thumbnail cache eviction strategy

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This commit is contained in:
heckflosse
2019-06-01 16:56:10 +02:00
parent 2bed5dc522
commit 25fdf2114e
1 changed files with 34 additions and 36 deletions
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70
rtgui/cachemanager.cc
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@@ -16,18 +16,19 @@
* You should have received a copy of the GNU General Public License
* along with RawTherapee. If not, see <http://www.gnu.org/licenses/>.
*/
#include "cachemanager.h"
#include <memory>
#include <iostream>
#include <glib/gstdio.h>
#include <dirent.h>
#include <giomm.h>
#ifdef WIN32
#include <windows.h>
#endif
#include "cachemanager.h"
#include "guiutils.h"
#include "options.h"
#include "procparamchangers.h"
@@ -340,66 +341,63 @@ Glib::ustring CacheManager::getCacheFileName (const Glib::ustring& subDir,
void CacheManager::applyCacheSizeLimitation () const
{
// first count files without fetching file name and timestamp.
auto cachedir = opendir(Glib::build_filename(baseDir, "data").c_str());
if (!cachedir) {
return;
}
std::size_t numFiles = 0;
try {
while (readdir(cachedir)) {
++numFiles;
}
const auto dirName = Glib::build_filename (baseDir, "data");
const auto dir = Gio::File::create_for_path (dirName);
auto enumerator = dir->enumerate_children ("");
while (numFiles <= options.maxCacheEntries && enumerator->next_file ()) {
++numFiles;
}
} catch (Glib::Exception&) {}
closedir(cachedir);
numFiles -= 2; // because . and .. are counted
if (numFiles <= options.maxCacheEntries) {
return;
}
using FNameMTime = std::pair<Glib::ustring, Glib::TimeVal>;
std::vector<FNameMTime> files;
files.reserve(numFiles);
constexpr auto md5_size = 32;
// get filenames and timestamps
try {
const auto dir = Gio::File::create_for_path(Glib::build_filename(baseDir, "data"));
const auto enumerator = dir->enumerate_children("standard::name,time::modified");
const auto dirName = Glib::build_filename (baseDir, "data");
const auto dir = Gio::File::create_for_path (dirName);
auto enumerator = dir->enumerate_children ("standard::name,time::modified");
while (auto file = enumerator->next_file ()) {
files.emplace_back (file->get_name (), file->modification_time ());
while (const auto file = enumerator->next_file()) {
const auto name = file->get_name();
if (name.size() >= md5_size + 5) {
files.emplace_back(name, file->modification_time());
}
}
} catch (Glib::Exception&) {}
if (files.size () <= options.maxCacheEntries) {
if (files.size() <= options.maxCacheEntries) {
// limit not reached
return;
}
std::sort (files.begin (), files.end (), [] (const FNameMTime& lhs, const FNameMTime& rhs)
constexpr auto reserve = 0.05f; // reserve 5% free cache space
const size_t toDelete = files.size() - options.maxCacheEntries + options.maxCacheEntries * reserve;
std::nth_element(files.begin(), files.begin() + toDelete, files.end(), [] (const FNameMTime& lhs, const FNameMTime& rhs)
{
return lhs.second < rhs.second;
});
auto cacheEntries = files.size ();
for (auto entry = files.begin (); cacheEntries-- > options.maxCacheEntries; ++entry) {
for (auto entry = files.begin(); entry < files.begin() + toDelete; ++entry) {
const auto& name = entry->first;
const auto name_size = name.size() - md5_size;
const auto fname = name.substr(0, name_size - 5);
const auto md5 = name.substr(name_size - 4, md5_size);
constexpr auto md5_size = 32;
const auto name_size = name.size();
if (name_size < md5_size + 5) {
continue;
}
const auto fname = name.substr (0, name_size - md5_size - 5);
const auto md5 = name.substr (name_size - md5_size - 4, md5_size);
deleteFiles (fname, md5, true, false);
deleteFiles(fname, md5, true, false);
}
}