f0ee2e1467
This is a step toward effectively eliminating reference counting. Reference counting is only needed when the memory in buffers can be shared. If we remove all forms of sharing, then the buffers would be in an owned state at all times. Then we would no longer need to worry about the state of the buffers before calling, e.g. `ensureWritable` and methods like that. Just removing `acquire` is not enough; we also need to remove the `slice` method. In this commit we are, however, starting with `acquire` because doing so requires rearranging the type hierarchy and the generics we have in play. This was not an easy exercise, but for the purpose of record keeping, it's useful to have that work separate from the work of removing `slice`.
41 lines
1.3 KiB
Java
41 lines
1.3 KiB
Java
/*
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* Copyright 2020 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.buffer.api;
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/**
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* The Drop interface is used by {@link Resource} instances to implement their resource disposal mechanics.
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* The {@link #drop(Object)} method will be called by the resource when they are closed.
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*
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* @param <T>
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*/
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@FunctionalInterface
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public interface Drop<T> {
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/**
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* Dispose of the resources in the given {@link Resource} instance.
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*
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* @param obj The {@link Resource} instance being dropped.
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*/
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void drop(T obj);
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/**
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* Called when the resource changes owner.
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*
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* @param obj The new {@link Resource} instance with the new owner.
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*/
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default void attach(T obj) {
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}
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}
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