63 lines
2.2 KiB
C#
63 lines
2.2 KiB
C#
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//
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// StripPartitioner.cs
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//
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// Author:
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// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
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//
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// Copyright (c) 2010 Jérémie "Garuma" Laval
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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
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// all 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
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// THE SOFTWARE.
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#if NET_4_0
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using System;
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using System.Threading;
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using System.Collections.Generic;
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using System.Collections.Concurrent;
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namespace System.Linq.Parallel
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{
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internal class StripPartitioner<T> : OrderablePartitioner<T>
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{
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IList<T> source;
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public StripPartitioner (IList<T> source) : base (true, false, true)
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{
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this.source = source;
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}
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public override IList<IEnumerator<KeyValuePair<long, T>>> GetOrderablePartitions (int partitionCount)
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{
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IEnumerator<KeyValuePair<long, T>>[] array = new IEnumerator<KeyValuePair<long, T>>[partitionCount];
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for (int i = 0; i < array.Length; i++)
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array[i] = GetStripEnumerator (i, partitionCount);
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return array;
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}
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IEnumerator<KeyValuePair<long, T>> GetStripEnumerator (int start, int partitionCount)
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{
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for (int i = start; i < source.Count; i += partitionCount) {
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//Console.WriteLine ("Num {0} yielding [{1} : {2}]", start, i, source[i]);
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yield return new KeyValuePair<long, T> (i, source [i]);
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}
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}
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}
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}
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#endif
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