69 lines
2.3 KiB
C#
69 lines
2.3 KiB
C#
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/*
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* Copyright (c) 2018 Stanislav Denisov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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using System.Threading;
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using System.Runtime.CompilerServices;
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namespace NetStack.Buffers {
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public abstract class ArrayPool<T> {
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#if NET_4_6 || NET_STANDARD_2_0
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private static ArrayPool<T> s_sharedInstance = null;
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#else
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private static volatile ArrayPool<T> s_sharedInstance = null;
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#endif
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public static ArrayPool<T> Shared {
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#if NET_4_6 || NET_STANDARD_2_0
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[MethodImpl(256)]
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get {
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return Volatile.Read(ref s_sharedInstance) ?? EnsureSharedCreated();
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}
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#else
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[MethodImpl(256)]
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get {
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return s_sharedInstance ?? EnsureSharedCreated();
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}
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#endif
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}
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#pragma warning disable 420
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[MethodImpl(MethodImplOptions.NoInlining)]
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private static ArrayPool<T> EnsureSharedCreated() {
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Interlocked.CompareExchange(ref s_sharedInstance, Create(), null);
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return s_sharedInstance;
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}
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public static ArrayPool<T> Create() {
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return new DefaultArrayPool<T>();
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}
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public static ArrayPool<T> Create(int maxArrayLength, int maxArraysPerBucket) {
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return new DefaultArrayPool<T>(maxArrayLength, maxArraysPerBucket);
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}
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public abstract T[] Rent(int minimumLength);
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public abstract void Return(T[] array, bool clearArray = false);
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}
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}
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