5 // Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
7 // Copyright (c) 2010 Jérémie "Garuma" Laval
9 // Permission is hereby granted, free of charge, to any person obtaining a copy
10 // of this software and associated documentation files (the "Software"), to deal
11 // in the Software without restriction, including without limitation the rights
12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 // copies of the Software, and to permit persons to whom the Software is
14 // furnished to do so, subject to the following conditions:
16 // The above copyright notice and this permission notice shall be included in
17 // all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 using System.Threading;
30 using System.Collections.Generic;
31 using System.Collections.Concurrent;
33 namespace System.Linq.Parallel
35 internal class StripPartitioner<T> : OrderablePartitioner<T>
39 public StripPartitioner (IList<T> source) : base (true, false, true)
44 public override IList<IEnumerator<KeyValuePair<long, T>>> GetOrderablePartitions (int partitionCount)
46 IEnumerator<KeyValuePair<long, T>>[] array = new IEnumerator<KeyValuePair<long, T>>[partitionCount];
47 for (int i = 0; i < array.Length; i++)
48 array[i] = GetStripEnumerator (i, partitionCount);
53 IEnumerator<KeyValuePair<long, T>> GetStripEnumerator (int start, int partitionCount)
55 for (int i = start; i < source.Count; i += partitionCount) {
56 //Console.WriteLine ("Num {0} yielding [{1} : {2}]", start, i, source[i]);
57 yield return new KeyValuePair<long, T> (i, source [i]);