86c929dd5a
This abstraction was only used to allow composing over both buffers and sends of buffers, but we can also do that with method overloads. The Deref had weird semantics and consequences that didn't make much sense. In other words, it did not pay a return on its complexity cost.
66 lines
2.1 KiB
Java
66 lines
2.1 KiB
Java
/*
|
|
* Copyright 2020 The Netty Project
|
|
*
|
|
* The Netty Project licenses this file to you under the Apache License,
|
|
* version 2.0 (the "License"); you may not use this file except in compliance
|
|
* with the License. You may obtain a copy of the License at:
|
|
*
|
|
* https://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
package io.netty.buffer.api;
|
|
|
|
import java.lang.invoke.VarHandle;
|
|
|
|
import static io.netty.buffer.api.internal.Statics.findVarHandle;
|
|
import static java.lang.invoke.MethodHandles.lookup;
|
|
|
|
class TransferSend<I extends Rc<I>, T extends Rc<I>> implements Send<I> {
|
|
private static final VarHandle RECEIVED = findVarHandle(lookup(), TransferSend.class, "received", boolean.class);
|
|
private final Owned<T> outgoing;
|
|
private final Drop<T> drop;
|
|
private final Class<?> concreteType;
|
|
@SuppressWarnings("unused")
|
|
private volatile boolean received; // Accessed via VarHandle
|
|
|
|
TransferSend(Owned<T> outgoing, Drop<T> drop, Class<?> concreteType) {
|
|
this.outgoing = outgoing;
|
|
this.drop = drop;
|
|
this.concreteType = concreteType;
|
|
}
|
|
|
|
@SuppressWarnings("unchecked")
|
|
@Override
|
|
public I receive() {
|
|
gateReception();
|
|
var copy = outgoing.transferOwnership(drop);
|
|
drop.attach(copy);
|
|
return (I) copy;
|
|
}
|
|
|
|
private void gateReception() {
|
|
if ((boolean) RECEIVED.getAndSet(this, true)) {
|
|
throw new IllegalStateException("This object has already been received.");
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean referentIsInstanceOf(Class<?> cls) {
|
|
return cls.isAssignableFrom(concreteType);
|
|
}
|
|
|
|
@Override
|
|
public void discard() {
|
|
if (!(boolean) RECEIVED.getAndSet(this, true)) {
|
|
var copy = outgoing.transferOwnership(drop);
|
|
drop.attach(copy);
|
|
copy.close();
|
|
}
|
|
}
|
|
}
|