2 // System.Threading.AsyncFlowControl structure
5 // Sebastien Pouliot <sebastien@ximian.com>
7 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 using System.Globalization;
30 using System.Runtime.InteropServices;
31 using System.Security;
33 namespace System.Threading {
35 internal enum AsyncFlowControlType {
42 public struct AsyncFlowControl : IDisposable {
44 internal struct AsyncFlowControl : IDisposable {
47 private AsyncFlowControlType _type;
49 internal AsyncFlowControl (Thread t, AsyncFlowControlType type)
58 throw new InvalidOperationException (Locale.GetText (
59 "Can only be called once."));
62 case AsyncFlowControlType.Execution:
63 ExecutionContext.RestoreFlow ();
65 case AsyncFlowControlType.Security:
66 SecurityContext.RestoreFlow ();
72 void IDisposable.Dispose ()
77 _type = AsyncFlowControlType.None;