From 1284369a329d3ae621c0ef0596d01d67e8c70e62 Mon Sep 17 00:00:00 2001
From: Tedd Hansen
Date: Sat, 18 Aug 2007 18:18:14 +0000
Subject: Started on AppDomains for ScriptEngine. Moved llFunctions in
 LSL_BaseClass.cs to LSL_BuiltIn_Commands.cs. Changed how scripts are loaded.

---
 .../ScriptEngine/DotNetEngine/AppDomainManager.cs  | 115 +++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 OpenSim/Region/ScriptEngine/DotNetEngine/AppDomainManager.cs

(limited to 'OpenSim/Region/ScriptEngine/DotNetEngine/AppDomainManager.cs')

diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/AppDomainManager.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/AppDomainManager.cs
new file mode 100644
index 0000000..1e20547
--- /dev/null
+++ b/OpenSim/Region/ScriptEngine/DotNetEngine/AppDomainManager.cs
@@ -0,0 +1,115 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Reflection;
+using System.Threading;
+using System.Runtime.Remoting;
+using System.IO;
+
+namespace OpenSim.Region.ScriptEngine.DotNetEngine
+{
+    public class AppDomainManager
+    {
+        private int MaxScriptsPerAppDomain = 10;
+        private List<AppDomainStructure> AppDomains = new List<AppDomainStructure>();
+        private struct 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;
+        }
+        private AppDomainStructure CurrentAD;
+        private object GetLock = new object();
+
+                private ScriptEngine m_scriptEngine;
+        public AppDomainManager(ScriptEngine scriptEngine)
+        {
+            m_scriptEngine = scriptEngine;
+        }
+
+        internal AppDomain GetFreeAppDomain()
+        {
+            lock(GetLock) {
+                // No current or current full?
+                if (CurrentAD.CurrentAppDomain == null || CurrentAD.ScriptsLoaded >= MaxScriptsPerAppDomain)
+                {
+                    // Create a new current AppDomain
+                    CurrentAD = new AppDomainStructure();
+                    CurrentAD.ScriptsWaitingUnload = 0; // to avoid compile warning for not in use
+                    CurrentAD.CurrentAppDomain = PrepareNewAppDomain();
+                    AppDomains.Add(CurrentAD);
+
+                }
+
+                // Increase number of scripts loaded
+                CurrentAD.ScriptsLoaded++;
+                // Return AppDomain
+                return CurrentAD.CurrentAppDomain;
+            } // lock
+        }
+
+        private int AppDomainNameCount;
+        private AppDomain PrepareNewAppDomain()
+        {
+            // Create and prepare a new AppDomain
+            AppDomainNameCount++;
+            // TODO: Currently security and configuration match current appdomain
+
+            // Construct and initialize settings for a second AppDomain.
+            AppDomainSetup ads = new AppDomainSetup();
+            ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;
+                //Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "ScriptEngines");
+            //ads.ApplicationName = "DotNetScriptEngine";
+            //ads.DynamicBase = ads.ApplicationBase;
+            
+            Console.WriteLine("AppDomain BaseDirectory: " + ads.ApplicationBase);
+            ads.DisallowBindingRedirects = false;
+            ads.DisallowCodeDownload = true;
+            ads.ShadowCopyFiles = "true";
+            
+            ads.ConfigurationFile =
+                AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
+
+            AppDomain AD = AppDomain.CreateDomain("ScriptAppDomain_" + AppDomainNameCount, null, ads);
+            foreach (Assembly a in AppDomain.CurrentDomain.GetAssemblies())
+            {
+                //Console.WriteLine("Loading: " + a.GetName(true));
+                try
+                {
+                    AD.Load(a.GetName(true));
+                    
+                }
+                catch (Exception e)
+                {
+                    //Console.WriteLine("FAILED load");
+                }
+                
+            }
+
+            Console.WriteLine("Assembly file: " + this.GetType().Assembly.CodeBase);
+            Console.WriteLine("Assembly name: " + this.GetType().ToString());
+            //AD.CreateInstanceFrom(this.GetType().Assembly.CodeBase, "OpenSim.Region.ScriptEngine.DotNetEngine.ScriptEngine");
+
+            //AD.Load(this.GetType().Assembly.CodeBase);
+
+            Console.WriteLine("Done preparing new appdomain.");
+            return AD;
+
+        }
+
+        public class NOOP : MarshalByRefType
+        {
+            public NOOP() {
+            }
+        }
+    }
+}
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