c73dd07384
Motivation: When Unsafe is available, we can supposedly do certain things faster than when it is not. Modification: Add a Buffer implementation that take advantage of sun.misc.Unsafe. It has not yet been verified if this is faster in any way than, say the ByteBuffer implementation or the MemorySegment implementation. Result: Another Buffer implementation that can be used when Unsafe is available.
47 lines
1.5 KiB
Java
47 lines
1.5 KiB
Java
/*
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* Copyright 2021 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.unsafe;
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import io.netty.buffer.api.MemoryManager;
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import io.netty.buffer.api.MemoryManagers;
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import io.netty.util.internal.PlatformDependent;
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public class UnsafeMemoryManagers implements MemoryManagers {
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public UnsafeMemoryManagers() {
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if (!PlatformDependent.hasUnsafe()) {
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throw new UnsupportedOperationException("Unsafe is not available.");
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}
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if (!PlatformDependent.hasDirectBufferNoCleanerConstructor()) {
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throw new UnsupportedOperationException("DirectByteBuffer internal constructor is not available.");
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}
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}
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@Override
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public MemoryManager getHeapMemoryManager() {
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return new UnsafeMemoryManager(false);
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}
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@Override
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public MemoryManager getNativeMemoryManager() {
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return new UnsafeMemoryManager(true);
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}
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@Override
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public String toString() {
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return "US";
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}
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}
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