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GetMainWindowTask.java
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55 lines (46 loc) · 1.83 KB
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// This file is part of the "IBController".
// Copyright (C) 2004 Steven M. Kearns (skearns23@yahoo.com )
// Copyright (C) 2004 - 2011 Richard L King (rlking@aultan.com)
// For conditions of distribution and use, see copyright notice in COPYING.txt
// IBController 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.
// IBController 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 IBController. If not, see <http://www.gnu.org/licenses/>.
package ibcontroller;
import java.util.concurrent.Callable;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import javax.swing.JFrame;
class GetMainWindowTask implements Callable<JFrame>{
private volatile JFrame mMainWindow;
private final Lock lock = new ReentrantLock();
private final Condition gotFrame = lock.newCondition();
@Override
public JFrame call() throws InterruptedException {
lock.lock();
try {
while (mMainWindow == null) {
gotFrame.await();
}
} finally {
lock.unlock();
}
return mMainWindow;
}
void setMainWindow(JFrame window) {
lock.lock();
try {
mMainWindow = window;
gotFrame.signal();
} finally {
lock.unlock();
}
}
}