599c01b762
This greatly simplifies the semantics around the const buffers. When they can no longer be made writable, there is no longer any need for "deconstification". I decided to call the method "makeReadOnly" to distinguish it from "asReadOnly" that is seen in ByteBuf and ByteBuffer. The latter two return read-only _views_ of the buffer, while makeReadOnly changes the state of the buffer in-place.
57 lines
1.9 KiB
Java
57 lines
1.9 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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import io.netty.buffer.api.internal.Statics;
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import java.util.function.Supplier;
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import static io.netty.buffer.api.internal.Statics.NO_OP_DROP;
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class ManagedBufferAllocator implements BufferAllocator, AllocatorControl {
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private final MemoryManager manager;
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ManagedBufferAllocator(MemoryManager manager) {
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this.manager = manager;
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}
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@Override
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public Buffer allocate(int size) {
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BufferAllocator.checkSize(size);
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return manager.allocateShared(this, size, manager.drop(), Statics.CLEANER);
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}
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@Override
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public Supplier<Buffer> constBufferSupplier(byte[] bytes) {
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Buffer constantBuffer = manager.allocateShared(this, bytes.length, manager.drop(), Statics.CLEANER);
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constantBuffer.writeBytes(bytes).makeReadOnly();
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return () -> manager.allocateConstChild(constantBuffer);
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}
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@Override
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public Object allocateUntethered(Buffer originator, int size) {
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BufferAllocator.checkSize(size);
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var buf = manager.allocateShared(this, size, NO_OP_DROP, Statics.CLEANER);
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return manager.unwrapRecoverableMemory(buf);
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}
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@Override
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public void recoverMemory(Object memory) {
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// Free the recovered memory.
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manager.recoverMemory(this, memory, manager.drop()).close();
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}
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}
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