1 // DataflowMessageHeader.cs
3 // Copyright (c) 2011 Jérémie "garuma" Laval
5 // Permission is hereby granted, free of charge, to any person obtaining a copy
6 // of this software and associated documentation files (the "Software"), to deal
7 // in the Software without restriction, including without limitation the rights
8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 // copies of the Software, and to permit persons to whom the Software is
10 // furnished to do so, subject to the following conditions:
12 // The above copyright notice and this permission notice shall be included in
13 // all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 using System.Threading.Tasks;
29 namespace System.Threading.Tasks.Dataflow
31 public struct DataflowMessageHeader : IEquatable<DataflowMessageHeader>
35 public DataflowMessageHeader (long id)
48 // Check that id isn't zero (as it would be with an empty struct ctor)
53 internal DataflowMessageHeader Increment ()
55 return new DataflowMessageHeader (Interlocked.Increment (ref id));
58 internal static DataflowMessageHeader NewValid ()
60 return new DataflowMessageHeader (1);
63 public override bool Equals (object obj)
65 return obj is DataflowMessageHeader ? Equals ((DataflowMessageHeader)obj) : false;
68 public bool Equals (DataflowMessageHeader other)
70 return other.id == id;
73 public override int GetHashCode ()
75 return id.GetHashCode ();
78 public static bool operator== (DataflowMessageHeader left, DataflowMessageHeader right)
80 return left.Equals (right);
83 public static bool operator!= (DataflowMessageHeader left, DataflowMessageHeader right)
85 return !left.Equals (right);