| | | 1 | | // Copyright (c) Microsoft Corporation. All rights reserved. |
| | | 2 | | // Licensed under the MIT License. |
| | | 3 | | |
| | | 4 | | using System.Collections.Generic; |
| | | 5 | | using System.Diagnostics; |
| | | 6 | | |
| | | 7 | | namespace Azure.Data.Tables.Queryable |
| | | 8 | | { |
| | | 9 | | |
| | | 10 | | internal sealed class ReferenceEqualityComparer<T> : ReferenceEqualityComparer, IEqualityComparer<T> |
| | | 11 | | { |
| | | 12 | | private static ReferenceEqualityComparer<T> s_instance; |
| | | 13 | | |
| | | 14 | | private ReferenceEqualityComparer() |
| | 2 | 15 | | : base() |
| | | 16 | | { |
| | 2 | 17 | | } |
| | | 18 | | |
| | | 19 | | internal static ReferenceEqualityComparer<T> Instance |
| | | 20 | | { |
| | | 21 | | get |
| | | 22 | | { |
| | 920 | 23 | | if (s_instance == null) |
| | | 24 | | { |
| | | 25 | | Debug.Assert(!typeof(T).IsValueType, "!typeof(T).IsValueType -- can't use reference equality in a me |
| | 2 | 26 | | ReferenceEqualityComparer<T> newInstance = new ReferenceEqualityComparer<T>(); |
| | 2 | 27 | | System.Threading.Interlocked.CompareExchange(ref s_instance, newInstance, null); |
| | | 28 | | } |
| | | 29 | | |
| | 920 | 30 | | return s_instance; |
| | | 31 | | } |
| | | 32 | | } |
| | | 33 | | |
| | | 34 | | public bool Equals(T x, T y) |
| | | 35 | | { |
| | 64 | 36 | | return object.ReferenceEquals(x, y); |
| | | 37 | | } |
| | | 38 | | |
| | | 39 | | public int GetHashCode(T obj) |
| | | 40 | | { |
| | 670 | 41 | | if (obj == null) |
| | | 42 | | { |
| | 0 | 43 | | return 0; |
| | | 44 | | } |
| | | 45 | | |
| | 670 | 46 | | return obj.GetHashCode(); |
| | | 47 | | } |
| | | 48 | | |
| | | 49 | | } |
| | | 50 | | } |