130 lines
3.6 KiB
C#
130 lines
3.6 KiB
C#
//
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// QueryOptions.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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namespace System.Linq.Parallel
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{
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internal class QueryOptions
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{
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public ParallelMergeOptions? Options {
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get;
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private set;
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}
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public ParallelExecutionMode? Mode {
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get;
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private set;
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}
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public CancellationToken Token {
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get;
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private set;
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}
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/* This token is to be used by some operator (like Take) to tell that
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* the execution of the query can be prematurly stopped
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*
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* It is set when passing QueryOptions to the different node's Get method
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* and ParallelExecuter should check after the call to this method is this guy has been
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* set. Operator may chain up multiple cancellation token that way.
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* When checking for this token, the task body should simply return.
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*/
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public CancellationToken ImplementerToken {
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get;
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private set;
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}
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public bool UseStrip {
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get;
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private set;
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}
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public bool? BehindOrderGuard {
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get;
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private set;
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}
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public int PartitionCount {
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get;
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private set;
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}
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public Tuple<bool, bool, bool> PartitionerSettings {
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get;
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internal set;
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}
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public CancellationToken MergedToken {
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get;
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private set;
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}
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public bool ShouldBeSequential {
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get;
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private set;
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}
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public QueryOptions (ParallelMergeOptions? options,
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ParallelExecutionMode? mode,
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CancellationToken token,
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bool useStrip,
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bool? behindOrderGuard,
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int partitionCount,
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CancellationToken implementerToken,
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bool shouldBeSequential)
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{
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Options = options;
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Mode = mode;
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Token = token;
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UseStrip = useStrip;
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BehindOrderGuard = behindOrderGuard;
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PartitionCount = partitionCount;
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PartitionerSettings = null;
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ImplementerToken = implementerToken;
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ShouldBeSequential = shouldBeSequential;
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MergeTokens (token, implementerToken);
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}
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void MergeTokens (CancellationToken token, CancellationToken implementerToken)
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{
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bool implementedNone = implementerToken == CancellationToken.None;
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bool tokenNone = token == CancellationToken.None;
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if (!implementedNone && !tokenNone)
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MergedToken = CancellationTokenSource.CreateLinkedTokenSource (implementerToken, token).Token;
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else if (implementedNone && !tokenNone)
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MergedToken = token;
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else if (!implementedNone && tokenNone)
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MergedToken = implementerToken;
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else
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MergedToken = CancellationToken.None;
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}
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}
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}
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#endif
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