blob: 63e18447fd5c09cf3511f584116988cd59f64a43 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.Threading;
using System.Runtime.Remoting;
using System.IO;
using OpenSim.Region.Environment.Scenes;
using OpenSim.Region.Environment.Scenes.Scripting;
using OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.LSL;
using OpenSim.Region.ScriptEngine.Common;
using libsecondlife;
namespace OpenSim.Region.ScriptEngine.DotNetEngine
{
public class AppDomainManager
{
private int MaxScriptsPerAppDomain = 1;
/// <summary>
/// Internal list of all AppDomains
/// </summary>
private List<AppDomainStructure> AppDomains = new List<AppDomainStructure>();
/// <summary>
/// Structure to keep track of data around AppDomain
/// </summary>
private class AppDomainStructure
{
/// <summary>
/// The AppDomain itself
/// </summary>
public AppDomain CurrentAppDomain;
/// <summary>
/// Number of scripts loaded into AppDomain
/// </summary>
public int ScriptsLoaded;
/// <summary>
/// Number of dead scripts
/// </summary>
public int ScriptsWaitingUnload;
}
/// <summary>
/// Current AppDomain
/// </summary>
private AppDomainStructure CurrentAD;
private object GetLock = new object(); // Mutex
private object FreeLock = new object(); // Mutex
//private ScriptEngine m_scriptEngine;
//public AppDomainManager(ScriptEngine scriptEngine)
public AppDomainManager()
{
//m_scriptEngine = scriptEngine;
}
/// <summary>
/// Find a free AppDomain, creating one if necessary
/// </summary>
/// <returns>Free AppDomain</returns>
private AppDomainStructure GetFreeAppDomain()
{
Console.WriteLine("Finding free AppDomain");
lock (GetLock)
{
// Current full?
if (CurrentAD != null && CurrentAD.ScriptsLoaded >= MaxScriptsPerAppDomain)
{
// Add it to AppDomains list and empty current
AppDomains.Add(CurrentAD);
CurrentAD = null;
}
// No current
if (CurrentAD == null)
{
// Create a new current AppDomain
CurrentAD = new AppDomainStructure();
CurrentAD.CurrentAppDomain = PrepareNewAppDomain();
}
Console.WriteLine("Scripts loaded in this Appdomain: " + CurrentAD.ScriptsLoaded);
return CurrentAD;
} // lock
}
private int AppDomainNameCount;
/// <summary>
/// Create and prepare a new AppDomain for scripts
/// </summary>
/// <returns>The new AppDomain</returns>
private AppDomain PrepareNewAppDomain()
{
// Create and prepare a new AppDomain
AppDomainNameCount++;
// TODO: Currently security match current appdomain
// Construct and initialize settings for a second AppDomain.
AppDomainSetup ads = new AppDomainSetup();
ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;
ads.DisallowBindingRedirects = false;
ads.DisallowCodeDownload = true;
ads.ShadowCopyFiles = "true"; // Enabled shadowing
ads.ConfigurationFile = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
AppDomain AD = AppDomain.CreateDomain("ScriptAppDomain_" + AppDomainNameCount, null, ads);
// Return the new AppDomain
return AD;
}
/// <summary>
/// Unload appdomains that are full and have only dead scripts
/// </summary>
private void UnloadAppDomains()
{
lock (FreeLock)
{
// Go through all
foreach (AppDomainStructure ads in new System.Collections.ArrayList(AppDomains))
{
// Don't process current AppDomain
if (ads.CurrentAppDomain != CurrentAD.CurrentAppDomain)
{
// Not current AppDomain
// Is number of unloaded bigger or equal to number of loaded?
if (ads.ScriptsLoaded <= ads.ScriptsWaitingUnload)
{
Console.WriteLine("Found empty AppDomain, unloading");
// Remove from internal list
AppDomains.Remove(ads);
#if DEBUG
long m = GC.GetTotalMemory(true);
#endif
// Unload
AppDomain.Unload(ads.CurrentAppDomain);
#if DEBUG
Console.WriteLine("AppDomain unload freed " + (m - GC.GetTotalMemory(true)) + " bytes of memory");
#endif
}
}
} // foreach
} // lock
}
public OpenSim.Region.ScriptEngine.DotNetEngine.Compiler.LSL.LSL_BaseClass LoadScript(string FileName)
{
// Find next available AppDomain to put it in
AppDomainStructure FreeAppDomain = GetFreeAppDomain();
Console.WriteLine("Loading into AppDomain: " + FileName);
LSL_BaseClass mbrt = (LSL_BaseClass)FreeAppDomain.CurrentAppDomain.CreateInstanceFromAndUnwrap(FileName, "SecondLife.Script");
//Console.WriteLine("ScriptEngine AppDomainManager: is proxy={0}", RemotingServices.IsTransparentProxy(mbrt));
FreeAppDomain.ScriptsLoaded++;
return mbrt;
}
/// <summary>
/// Increase "dead script" counter for an AppDomain
/// </summary>
/// <param name="ad"></param>
//[Obsolete("Needs fixing, needs a real purpose in life!!!")]
public void StopScript(AppDomain ad)
{
lock (FreeLock)
{
Console.WriteLine("Stopping script in AppDomain");
// Check if it is current AppDomain
if (CurrentAD.CurrentAppDomain == ad)
{
// Yes - increase
CurrentAD.ScriptsWaitingUnload++;
return;
}
// Lopp through all AppDomains
foreach (AppDomainStructure ads in new System.Collections.ArrayList(AppDomains))
{
if (ads.CurrentAppDomain == ad)
{
// Found it
ads.ScriptsWaitingUnload++;
break;
}
} // foreach
} // lock
UnloadAppDomains(); // Outsite lock, has its own GetLock
}
}
}
|
