2 // System.Runtime.Remoting.Messaging.CallContext.cs
4 // Author: Jaime Anguiano Olarra (jaime@gnome.org)
5 // Lluis Sanchez Gual (lluis@ximian.com)
7 // (c) 2002, Jaime Anguiano Olarra
10 ///Provides several properties that come with the execution code path.
11 ///This class is sealed.
15 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
17 // Permission is hereby granted, free of charge, to any person obtaining
18 // a copy of this software and associated documentation files (the
19 // "Software"), to deal in the Software without restriction, including
20 // without limitation the rights to use, copy, modify, merge, publish,
21 // distribute, sublicense, and/or sell copies of the Software, and to
22 // permit persons to whom the Software is furnished to do so, subject to
23 // the following conditions:
25 // The above copyright notice and this permission notice shall be
26 // included in all copies or substantial portions of the Software.
28 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
29 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
30 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
31 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
32 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
33 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
34 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 using System.Threading;
39 using System.Collections;
41 namespace System.Runtime.Remoting.Messaging
45 public sealed class CallContext
47 internal const string HeadersKey = "__Headers";
48 internal const string ContextKey = "__CallContext";
50 private CallContext ()
55 public static void FreeNamedDataSlot (string name)
57 Datastore.Remove (name);
60 public static object GetData (string name)
62 return Datastore [name];
65 public static Header[] GetHeaders ()
67 return (Header[]) Datastore [HeadersKey];
70 public static void SetData (string name, object data)
72 Datastore [name] = data;
75 public static void SetHeaders (Header[] headers)
77 Datastore [HeadersKey] = headers;
80 internal static LogicalCallContext CreateLogicalCallContext ()
82 LocalDataStoreSlot ds = Thread.GetNamedDataSlot (ContextKey);
83 Hashtable res = (Hashtable) Thread.GetData (ds);
85 LogicalCallContext ctx = new LogicalCallContext();
86 if (res == null) return ctx;
88 foreach (DictionaryEntry entry in res)
89 if (entry.Value is ILogicalThreadAffinative)
90 ctx.SetData ((string)entry.Key, entry.Value);
95 internal static object SetCurrentCallContext (LogicalCallContext ctx)
97 LocalDataStoreSlot ds = Thread.GetNamedDataSlot (ContextKey);
98 object oldData = Thread.GetData (ds);
100 if (ctx != null && ctx.HasInfo)
102 Hashtable newData = new Hashtable();
103 Hashtable data = ctx.Datastore;
105 foreach (DictionaryEntry entry in data)
106 newData [(string)entry.Key] = entry.Value;
108 Thread.SetData (ds, newData);
111 Thread.SetData (ds, null);
116 internal static void UpdateCurrentCallContext (LogicalCallContext ctx)
118 Hashtable data = ctx.Datastore;
119 foreach (DictionaryEntry entry in data)
120 SetData ((string)entry.Key, entry.Value);
123 internal static void RestoreCallContext (object oldContext)
125 LocalDataStoreSlot ds = Thread.GetNamedDataSlot (ContextKey);
126 Thread.SetData (ds, oldContext);
129 private static Hashtable Datastore
133 LocalDataStoreSlot ds = Thread.GetNamedDataSlot (ContextKey);
134 Hashtable res = (Hashtable) Thread.GetData (ds);
136 res = new Hashtable ();
137 Thread.SetData (ds, res);
144 public interface ILogicalThreadAffinative