48 lines
2.0 KiB
C#
48 lines
2.0 KiB
C#
// Copyright (c) Microsoft. All rights reserved.
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// Licensed under the MIT license. See LICENSE file in the project root for full license information.
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// =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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//
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// DataflowMessageStatus.cs
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//
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//
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// Status about the propagation of a message.
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//
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// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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namespace System.Threading.Tasks.Dataflow
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{
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/// <summary>Represents the status of a <see cref="DataflowMessageHeader"/> when passed between dataflow blocks.</summary>
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public enum DataflowMessageStatus
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{
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/// <summary>
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/// Indicates that the <see cref="ITargetBlock{TInput}"/> accepted the message. Once a target has accepted a message,
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/// it is wholly owned by the target.
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/// </summary>
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Accepted = 0x0,
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/// <summary>
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/// Indicates that the <see cref="ITargetBlock{TInput}"/> declined the message. The <see cref="ISourceBlock{TOutput}"/> still owns the message.
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/// </summary>
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Declined = 0x1,
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/// <summary>
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/// Indicates that the <see cref="ITargetBlock{TInput}"/> postponed the message for potential consumption at a later time.
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/// The <see cref="ISourceBlock{TOutput}"/> still owns the message.
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/// </summary>
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Postponed = 0x2,
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/// <summary>
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/// Indicates that the <see cref="ITargetBlock{TInput}"/> tried to accept the message from the <see cref="ISourceBlock{TOutput}"/>, but the
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/// message was no longer available.
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/// </summary>
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NotAvailable = 0x3,
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/// <summary>
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/// Indicates that the <see cref="ITargetBlock{TInput}"/> declined the message. The <see cref="ISourceBlock{TOutput}"/> still owns the message.
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/// Additionally, the <see cref="ITargetBlock{TInput}"/> will decline all future messages sent by the source.
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/// </summary>
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DecliningPermanently = 0x4
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}
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}
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