78 lines
2.7 KiB
Java
78 lines
2.7 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.netty5.buffer.api;
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import io.netty5.buffer.api.internal.Statics;
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import java.util.function.Supplier;
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import static io.netty5.buffer.api.internal.Statics.NO_OP_DROP;
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import static io.netty5.buffer.api.internal.Statics.allocatorClosedException;
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class ManagedBufferAllocator implements BufferAllocator, AllocatorControl {
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private final MemoryManager manager;
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private final AllocationType allocationType;
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private volatile boolean closed;
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ManagedBufferAllocator(MemoryManager manager, boolean direct) {
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this.manager = manager;
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allocationType = direct? StandardAllocationTypes.OFF_HEAP : StandardAllocationTypes.ON_HEAP;
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}
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@Override
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public Buffer allocate(int size) {
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if (closed) {
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throw allocatorClosedException();
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}
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Statics.assertValidBufferSize(size);
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return manager.allocateShared(this, size, manager.drop(), Statics.CLEANER, allocationType);
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}
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@Override
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public Supplier<Buffer> constBufferSupplier(byte[] bytes) {
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if (closed) {
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throw allocatorClosedException();
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}
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Buffer constantBuffer = manager.allocateShared(
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this, bytes.length, manager.drop(), Statics.CLEANER, allocationType);
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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 void close() {
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closed = true;
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}
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@SuppressWarnings("unchecked")
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@Override
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public UntetheredMemory allocateUntethered(Buffer originator, int size) {
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Statics.assertValidBufferSize(size);
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var buf = manager.allocateShared(this, size, NO_OP_DROP, Statics.CLEANER, allocationType);
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return new UntetheredMemory() {
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@Override
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public <Memory> Memory memory() {
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return (Memory) manager.unwrapRecoverableMemory(buf);
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}
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@Override
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public <BufferType extends Buffer> Drop<BufferType> drop() {
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return (Drop<BufferType>) manager.drop();
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}
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};
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}
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}
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