/*
* Overchan Android (Meta Imageboard Client)
* Copyright (C) 2014-2016 miku-nyan <https://github.com/miku-nyan>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package nya.miku.wishmaster.ui.downloading;
import java.util.HashSet;
import java.util.Set;
/**
* Синхронизация загрузок (блокировка загружающихся в данный момент файлов)
* @author miku-nyan
*
*/
public class DownloadingLocker {
private Set<String> currentDownloads;
public DownloadingLocker() {
currentDownloads = new HashSet<String>();
}
public boolean lock(String filename) {
synchronized (currentDownloads) {
if (currentDownloads.contains(filename)) return false;
currentDownloads.add(filename);
return true;
}
}
public void unlock(String filename) {
synchronized (currentDownloads) {
currentDownloads.remove(filename);
currentDownloads.notifyAll();
}
}
public boolean isLocked(String filename) {
synchronized (currentDownloads) {
return currentDownloads.contains(filename);
}
}
public void waitUnlock(String filename) {
synchronized (currentDownloads) {
while (currentDownloads.contains(filename)) {
try {
currentDownloads.wait();
} catch (Exception e) {
}
}
}
}
}