Exemplo n.º 1
0
 /**
  * @return if <0, then this pipe should be stopped. If ==0, it should not wait. If >0, if it
  *     should wait
  */
 int execute() {
   if (!lock.tryAcquire()) return 1; // currently being accessed
   Thread myThread = Thread.currentThread();
   int threadIndex = -1;
   for (int i = 0; i < threads.length; i++) {
     if (threads[i] == null) {
       threads[i] = myThread;
       threadIndex = i;
       break;
     }
     if (myThread != threads[i]) continue;
     threadIndex = i;
     break;
   }
   Signal signal;
   if (threadIndex < 0) {
     signal = dummySignal;
   } else {
     SignalImpl s = signals[threadIndex];
     s.threadIndex = threadIndex;
     s.signaled = false;
     signal = s;
   }
   boolean hasData;
   try {
     hasData = poll(signal, null);
   } finally {
     signal.signal();
     if (threadIndex < 0) lock.release();
   }
   return 0;
 }
Exemplo n.º 2
0
 /**
  * Look for data from all the inputs
  *
  * @return true if data was consumed
  */
 private boolean poll(Signal signal, Signal parent) {
   AtomicReferenceArray<T> o = outputs;
   for (int i = 0; i < o.length(); i++) {
     T input = o.getAndSet(i, null);
     if (input == null) continue;
     long seq = ++sequence;
     if (parent != null) parent.signal();
     S product = producer.execute(input, reuseReceptors.get(i), signal);
     signal.signal();
     if (!consume(product, seq, 0)) {
       Thread.yield();
       if (!consume(product, seq, 0))
         logger.info(
             "failed to consume product (" + product + ") from producer (" + producer + ")");
     }
     producer.complete(product);
     return product != null;
   }
   return false;
 }
Exemplo n.º 3
0
 @Override
 public Boolean execute(Object d, Receptor<Object> r, Signal parent) {
   r.lazySet(d); // put the data back in for polling
   boolean data = false;
   for (int i = 0; i < children.length; i++) {
     AtomicIntegerArray inUse = this.inUse;
     if (!inUse.compareAndSet(i, 0, 1)) {
       if (inUse.get(i) == 2) sleep();
       continue;
     }
     PooledFatPipe child = children[i];
     if (child == null) {
       inUse.set(i, 0);
       continue;
     }
     Signal signal;
     if (parent.getThreadIndex() < 0) {
       signal = new ChildSignalImpl(inUse, i);
     } else {
       ChildSignalImpl s = signals[i * poolSize + parent.getThreadIndex()];
       if (s == null || s.inUse != inUse) {
         sleep();
         inUse.set(i, 0);
         continue;
       }
       s.index = i;
       s.notified = false;
       signal = s;
     }
     try {
       data |= child.poll(signal, parent);
     } catch (Exception e) {
       if (listener == null) logger.error("poll", e);
       else listener.exceptionThrown(e);
     } finally {
       signal.signal();
     }
   }
   return data ? Boolean.TRUE : null;
 }