public final class FFBuffer<E> extends FFBufferL3Pad<E> implements java.util.Queue<E>
MessagePassingQueue.Consumer<T>, MessagePassingQueue.ExitCondition, MessagePassingQueue.Supplier<T>, MessagePassingQueue.WaitStrategy| Modifier and Type | Field and Description |
|---|---|
private static long |
HEAD_OFFSET |
private static long |
TAIL_OFFSET |
p30, p31, p32, p33, p34, p35, p36, p37, p40, p41, p42, p43, p44, p45, p46headtailbuffer, maskp01, p02, p03, p04, p05, p06, p07, p17UNBOUNDED_CAPACITY| Constructor and Description |
|---|
FFBuffer(int capacity) |
| Modifier and Type | Method and Description |
|---|---|
int |
drain(MessagePassingQueue.Consumer<E> c)
Remove all available item from the queue and hand to consume.
|
int |
drain(MessagePassingQueue.Consumer<E> c,
int limit)
Remove up to limit elements from the queue and hand to consume.
|
void |
drain(MessagePassingQueue.Consumer<E> c,
MessagePassingQueue.WaitStrategy wait,
MessagePassingQueue.ExitCondition exit)
Remove elements from the queue and hand to consume forever.
|
int |
fill(MessagePassingQueue.Supplier<E> s)
Stuff the queue with elements from the supplier.
|
int |
fill(MessagePassingQueue.Supplier<E> s,
int limit)
Stuff the queue with up to limit elements from the supplier.
|
void |
fill(MessagePassingQueue.Supplier<E> s,
MessagePassingQueue.WaitStrategy wait,
MessagePassingQueue.ExitCondition exit)
Stuff the queue with elements from the supplier forever.
|
private long |
getHead() |
private long |
getTail() |
boolean |
isEmpty()
This method's accuracy is subject to concurrent modifications happening as the observation is carried
out.
|
boolean |
offer(E e)
Called from a producer thread subject to the restrictions appropriate to the implementation and
according to the
Queue.offer(Object) interface. |
E |
peek()
Called from the consumer thread subject to the restrictions appropriate to the implementation and
according to the
Queue.peek() interface. |
E |
poll()
Called from the consumer thread subject to the restrictions appropriate to the implementation and
according to the
Queue.poll() interface. |
boolean |
relaxedOffer(E message)
Called from a producer thread subject to the restrictions appropriate to the implementation.
|
E |
relaxedPeek()
Called from the consumer thread subject to the restrictions appropriate to the implementation.
|
E |
relaxedPoll()
Called from the consumer thread subject to the restrictions appropriate to the implementation.
|
int |
size()
This method's accuracy is subject to concurrent modifications happening as the size is estimated and as
such is a best effort rather than absolute value.
|
calcElementOffset, calcElementOffset, capacity, clear, iteratorcontains, containsAll, remove, removeAll, retainAll, toArray, toArray, toStringclone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, waitprivate static final long TAIL_OFFSET
private static final long HEAD_OFFSET
private long getHead()
private long getTail()
public boolean offer(E e)
MessagePassingQueueQueue.offer(Object) interface.offer in interface java.util.Queue<E>offer in interface MessagePassingQueue<E>e - not null, will throw NPE if it ispublic E poll()
MessagePassingQueueQueue.poll() interface.poll in interface java.util.Queue<E>poll in interface MessagePassingQueue<E>public E peek()
MessagePassingQueueQueue.peek() interface.peek in interface java.util.Queue<E>peek in interface MessagePassingQueue<E>public int size()
MessagePassingQueuesize in interface java.util.Collection<E>size in interface MessagePassingQueue<E>size in class java.util.AbstractCollection<E>Integer.MAX_VALUE but less or equals to
capacity (if bounded).public boolean isEmpty()
MessagePassingQueueisEmpty in interface java.util.Collection<E>isEmpty in interface MessagePassingQueue<E>isEmpty in class java.util.AbstractCollection<E>public boolean relaxedOffer(E message)
MessagePassingQueueQueue.offer(Object) this method may return false without the queue being full.relaxedOffer in interface MessagePassingQueue<E>message - not null, will throw NPE if it ispublic E relaxedPoll()
MessagePassingQueueQueue.poll() this method may return null without the queue being empty.relaxedPoll in interface MessagePassingQueue<E>public E relaxedPeek()
MessagePassingQueueQueue.peek() this method may return null without the queue being empty.relaxedPeek in interface MessagePassingQueue<E>public int drain(MessagePassingQueue.Consumer<E> c)
MessagePassingQueue
M m;
while((m = relaxedPoll()) != null){
c.accept(m);
}
drain in interface MessagePassingQueue<E>public int fill(MessagePassingQueue.Supplier<E> s)
MessagePassingQueue
while(relaxedOffer(s.get());
fill in interface MessagePassingQueue<E>public int drain(MessagePassingQueue.Consumer<E> c, int limit)
MessagePassingQueue
M m;
while((m = relaxedPoll()) != null){
c.accept(m);
}
There's no strong commitment to the queue being empty at the end of a drain. Called from a consumer
thread subject to the restrictions appropriate to the implementation.drain in interface MessagePassingQueue<E>public int fill(MessagePassingQueue.Supplier<E> s, int limit)
MessagePassingQueue
for(int i=0; i < limit && relaxedOffer(s.get(); i++);
There's no strong commitment to the queue being full at the end of a fill. Called from a producer
thread subject to the restrictions appropriate to the implementation.fill in interface MessagePassingQueue<E>public void drain(MessagePassingQueue.Consumer<E> c, MessagePassingQueue.WaitStrategy wait, MessagePassingQueue.ExitCondition exit)
MessagePassingQueue
int idleCounter = 0;
while (exit.keepRunning()) {
E e = relaxedPoll();
if(e==null){
idleCounter = wait.idle(idleCounter);
continue;
}
idleCounter = 0;
c.accept(e);
}
Called from a consumer thread subject to the restrictions appropriate to the implementation.drain in interface MessagePassingQueue<E>public void fill(MessagePassingQueue.Supplier<E> s, MessagePassingQueue.WaitStrategy wait, MessagePassingQueue.ExitCondition exit)
MessagePassingQueue
int idleCounter = 0;
while (exit.keepRunning()) {
E e = s.get();
while (!relaxedOffer(e)) {
idleCounter = wait.idle(idleCounter);
continue;
}
idleCounter = 0;
}
Called from a producer thread subject to the restrictions appropriate to the implementation.fill in interface MessagePassingQueue<E>