66 lines
2.5 KiB
C#
66 lines
2.5 KiB
C#
// This file is part of YamlDotNet - A .NET library for YAML.
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// Copyright (c) Antoine Aubry and contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// 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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using System;
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using System.Collections.Concurrent;
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namespace YamlDotNet.Helpers
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{
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internal static class DictionaryExtensions
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{
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#if NETSTANDARD || NETFRAMEWORK
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public static bool TryAdd<T, V>(this System.Collections.Generic.Dictionary<T, V> dictionary, T key, V value)
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{
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if (dictionary.ContainsKey(key))
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{
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return false;
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}
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dictionary.Add(key, value);
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return true;
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}
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#endif
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#if NETSTANDARD || NETFRAMEWORK
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public static TValue GetOrAdd<TKey, TValue, TArg>(this ConcurrentDictionary<TKey, TValue> dictionary, TKey key, Func<TKey, TArg, TValue> valueFactory, TArg arg)
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{
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if (dictionary == null) { throw new ArgumentNullException(nameof(dictionary)); }
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if (key == null) { throw new ArgumentNullException(nameof(key)); }
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if (valueFactory == null) { throw new ArgumentNullException(nameof(valueFactory)); }
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while (true)
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{
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if (dictionary.TryGetValue(key, out var value))
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{
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return value;
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}
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value = valueFactory(key, arg);
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if (dictionary.TryAdd(key, value))
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{
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return value;
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}
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}
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}
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#endif
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}
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}
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