1  // Copyright (c) Microsoft Corporation
 2  // The Microsoft Corporation licenses this file to you under the MIT license.
 3  // See the LICENSE file in the project root for more information.
 4  
 5  using System.Threading;
 6  
 7  namespace Microsoft.CmdPal.Core.Common.Helpers;
 8  
 9  /// <summary>
10  /// Thread-safe boolean implementation using atomic operations
11  /// </summary>
12  public struct InterlockedBoolean(bool initialValue = false)
13  {
14      private int _value = initialValue ? 1 : 0;
15  
16      /// <summary>
17      /// Gets or sets the boolean value atomically
18      /// </summary>
19      public bool Value
20      {
21          get => Volatile.Read(ref _value) == 1;
22          set => Interlocked.Exchange(ref _value, value ? 1 : 0);
23      }
24  
25      /// <summary>
26      /// Atomically sets the value to true
27      /// </summary>
28      /// <returns>True if the value was previously false, false if it was already true</returns>
29      public bool Set()
30      {
31          return Interlocked.Exchange(ref _value, 1) == 0;
32      }
33  
34      /// <summary>
35      /// Atomically sets the value to false
36      /// </summary>
37      /// <returns>True if the value was previously true, false if it was already false</returns>
38      public bool Clear()
39      {
40          return Interlocked.Exchange(ref _value, 0) == 1;
41      }
42  
43      public override int GetHashCode() => Value.GetHashCode();
44  
45      public override string ToString() => Value.ToString();
46  }