1 // ***********************************************************************
2 // Copyright (c) 2012 Charlie Poole
4 // Permission is hereby granted, free of charge, to any person obtaining
5 // a copy of this software and associated documentation files (the
6 // "Software"), to deal in the Software without restriction, including
7 // without limitation the rights to use, copy, modify, merge, publish,
8 // distribute, sublicense, and/or sell copies of the Software, and to
9 // permit persons to whom the Software is furnished to do so, subject to
10 // the following conditions:
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 // ***********************************************************************
25 #define NUNIT_FRAMEWORK
29 #if !NET_4_0 && !NET_4_5 || SILVERLIGHT
30 using System.Threading;
32 namespace NUnit.Framework.Internal.Execution
35 /// A simplified implementation of .NET 4 CountdownEvent
36 /// for use in earlier versions of .NET. Only the methods
37 /// used by NUnit are implemented.
39 public class CountdownEvent
43 object _lock = new object();
44 ManualResetEvent _event = new ManualResetEvent(false);
47 /// Construct a CountdownEvent
49 /// <param name="initialCount">The initial count</param>
50 public CountdownEvent(int initialCount)
52 _initialCount = _remainingCount = initialCount;
56 /// Gets the initial count established for the CountdownEvent
58 public int InitialCount
60 get { return _initialCount; }
64 /// Gets the current count remaining for the CountdownEvent
66 public int CurrentCount
68 get { return _remainingCount; }
72 /// Decrement the count by one
78 if (--_remainingCount == 0)
84 /// Block the thread until the count reaches zero