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package com.koushikdutta.async;
import java.util.LinkedList;
import java.util.WeakHashMap;
import java.util.concurrent.Semaphore;
public class ThreadQueue extends LinkedList<Runnable> {
final private static WeakHashMap<Thread, ThreadQueue> mThreadQueues = new WeakHashMap<Thread, ThreadQueue>();
static ThreadQueue getOrCreateThreadQueue(Thread thread) {
ThreadQueue queue;
synchronized (mThreadQueues) {
queue = mThreadQueues.get(thread);
if (queue == null) {
queue = new ThreadQueue();
mThreadQueues.put(thread, queue);
}
}
return queue;
}
static void release(AsyncSemaphore semaphore) {
synchronized (mThreadQueues) {
for (ThreadQueue threadQueue: mThreadQueues.values()) {
if (threadQueue.waiter == semaphore)
threadQueue.queueSemaphore.release();
}
}
}
AsyncSemaphore waiter;
Semaphore queueSemaphore = new Semaphore(0);
@Override
public boolean add(Runnable object) {
synchronized (this) {
return super.add(object);
}
}
@Override
public boolean remove(Object object) {
synchronized (this) {
return super.remove(object);
}
}
@Override
public Runnable remove() {
synchronized (this) {
if (this.isEmpty())
return null;
return super.remove();
}
}
}
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