98 lines
2.7 KiB
C#
98 lines
2.7 KiB
C#
// ParallelState.cs
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//
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// Copyright (c) 2008 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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//
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//
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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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namespace System.Threading.Tasks
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{
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[System.Diagnostics.DebuggerDisplayAttribute ("ShouldExitCurrentIteration = {ShouldExitCurrentIteration}")]
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public class ParallelLoopState
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{
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internal class ExternalInfos
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{
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public bool IsStopped;
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public AtomicBooleanValue IsBroken = new AtomicBooleanValue ();
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public volatile bool IsExceptional;
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public long? LowestBreakIteration;
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}
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ExternalInfos extInfos;
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internal ParallelLoopState (ExternalInfos extInfos)
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{
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this.extInfos = extInfos;
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}
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public bool IsStopped {
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get {
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return extInfos.IsStopped;
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}
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}
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public bool IsExceptional {
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get {
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return extInfos.IsExceptional;
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}
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}
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public long? LowestBreakIteration {
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get {
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return extInfos.LowestBreakIteration;
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}
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}
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internal int CurrentIteration {
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get;
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set;
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}
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public bool ShouldExitCurrentIteration {
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get {
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return IsExceptional || IsStopped;
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}
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}
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public void Break ()
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{
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if (extInfos.IsStopped)
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throw new InvalidOperationException ("The Stop method was previously called. Break and Stop may not be used in combination by iterations of the same loop.");
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bool result = extInfos.IsBroken.Exchange (true);
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if (!result)
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extInfos.LowestBreakIteration = CurrentIteration;
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}
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public void Stop ()
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{
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if (extInfos.IsBroken.Value)
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throw new InvalidOperationException ("The Break method was previously called. Break and Stop may not be used in combination by iterations of the same loop.");
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extInfos.IsStopped = true;
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}
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}
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}
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#endif
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