2 // System.Threading.Thread.cs
5 // Zoltan Varga (vargaz@freemail.hu)
6 // Sebastien Pouliot <sebastien@ximian.com>
8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Collections;
31 using System.Diagnostics;
32 using System.Reflection;
33 using System.Runtime.InteropServices;
34 using System.Runtime.Serialization;
35 using System.Security;
36 using System.Security.Permissions;
38 namespace System.Threading {
41 public sealed class CompressedStack : ISerializable {
42 private ArrayList _list;
44 internal CompressedStack (int length)
47 _list = new ArrayList (length);
50 internal CompressedStack (CompressedStack cs)
52 if ((cs != null) && (cs._list != null))
53 _list = (ArrayList) cs._list.Clone ();
56 [ComVisibleAttribute (false)]
57 public CompressedStack CreateCopy ()
59 return new CompressedStack (this);
62 public static CompressedStack Capture ()
65 throw new NotSupportedException ();
67 CompressedStack cs = new CompressedStack (0);
68 cs._list = SecurityFrame.GetStack (1);
70 // include any current CompressedStack inside the new Capture
71 CompressedStack currentCs = Thread.CurrentThread.ExecutionContext.SecurityContext.CompressedStack;
72 if (currentCs != null) {
73 for (int i=0; i < currentCs._list.Count; i++)
74 cs._list.Add (currentCs._list [i]);
80 // NOTE: This method doesn't show in the class library status page because
81 // it cannot be "found" with the StrongNameIdentityPermission for ECMA key.
84 static public CompressedStack GetCompressedStack ()
87 throw new NotSupportedException ();
89 // Note: CompressedStack.GetCompressedStack doesn't return null
90 // like Thread.CurrentThread.GetCompressedStack if no compressed
93 CompressedStack cs = Thread.CurrentThread.ExecutionContext.SecurityContext.CompressedStack;
94 if (cs == null || cs.IsEmpty ()) {
95 cs = CompressedStack.Capture ();
97 cs = cs.CreateCopy ();
98 // merge the existing compressed stack (from a previous Thread) with the current
99 // Thread stack so we can assign "all of it" to yet another Thread
100 CompressedStack newstack = CompressedStack.Capture ();
101 for (int i=0; i < newstack._list.Count; i++)
102 cs._list.Add (newstack._list [i]);
108 [MonoTODO ("incomplete")]
110 public void GetObjectData (SerializationInfo info, StreamingContext context)
113 throw new ArgumentNullException ("info");
117 static public void Run (CompressedStack compressedStack, ContextCallback callback, object state)
120 throw new NotSupportedException ();
122 if (compressedStack == null)
123 throw new ArgumentException ("compressedStack");
125 Thread t = Thread.CurrentThread;
126 CompressedStack original = null;
128 original = t.ExecutionContext.SecurityContext.CompressedStack;
129 t.ExecutionContext.SecurityContext.CompressedStack = compressedStack;
133 if (original != null)
134 t.ExecutionContext.SecurityContext.CompressedStack = original;
140 internal bool Equals (CompressedStack cs)
143 return cs.IsEmpty ();
146 if (_list.Count != cs._list.Count)
149 for (int i=0; i < _list.Count; i++) {
150 SecurityFrame sf1 = (SecurityFrame) _list [i];
151 SecurityFrame sf2 = (SecurityFrame) cs._list [i];
152 if (!sf1.Equals (sf2))
158 internal bool IsEmpty ()
160 return ((_list == null) || (_list.Count == 0));
163 internal IList List {
164 get { return _list; }