From e6ddb5de7de4ed61fa19b3805cd77104328eb20a Mon Sep 17 00:00:00 2001
From: Tedd Hansen
Date: Wed, 26 Nov 2008 11:12:57 +0000
Subject: Attempt to give script objects a proper lease time (DNE and xengine).
 Relies on GC. Also removed lease for LSL_Api as it strictly speaking should
 not be MarshalByRef. Or should it? If so I broke scripting! :)

---
 .../ScriptEngine/Shared/Api/Implementation/LSL_Api.cs   | 14 +++-----------
 .../ScriptEngine/Shared/Api/Runtime/ScriptBase.cs       | 13 ++++++++-----
 .../ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs    | 17 +++++++++++++++++
 .../ScriptEngine/Shared/Instance/ScriptInstance.cs      | 11 +++++++++++
 4 files changed, 39 insertions(+), 16 deletions(-)
 create mode 100644 OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs

(limited to 'OpenSim/Region/ScriptEngine/Shared')

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 17dca98..cbd99bb 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -29,6 +29,7 @@ using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Runtime.Remoting.Lifetime;
+using System.Security.Permissions;
 using System.Text;
 using System.Threading;
 using Nini.Config;
@@ -64,7 +65,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
     /// <summary>
     /// Contains all LSL ll-functions. This class will be in Default AppDomain.
     /// </summary>
-    public class LSL_Api : MarshalByRefObject, ILSL_Api, IScriptApi
+    public class LSL_Api : ILSL_Api, IScriptApi
     {
         protected IScriptEngine m_ScriptEngine;
         protected SceneObjectPart m_host;
@@ -98,17 +99,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             AsyncCommands = new AsyncCommandManager(ScriptEngine);
         }
 
-        // Object never expires
-        public override Object InitializeLifetimeService()
-        {
-            ILease lease = (ILease)base.InitializeLifetimeService();
 
-            if (lease.CurrentState == LeaseState.Initial)
-            {
-                lease.InitialLeaseTime = TimeSpan.Zero;
-            }
-            return lease;
-        }
+
 
         protected void ScriptSleep(int delay)
         {
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptBase.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptBase.cs
index 25c823d..06307bb 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptBase.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptBase.cs
@@ -27,6 +27,7 @@
 
 using System;
 using System.Runtime.Remoting.Lifetime;
+using System.Security.Permissions;
 using System.Threading;
 using System.Reflection;
 using System.Collections;
@@ -40,16 +41,18 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
     {
         private Dictionary<string,MethodInfo> inits = new Dictionary<string,MethodInfo>();
 
-        //
-        // Never expire this object
-        //
+        // Object expires if we don't keep it alive
+        // sponsor will be added on object load
+        [SecurityPermissionAttribute(SecurityAction.Demand,
+                             Flags = SecurityPermissionFlag.Infrastructure)]
         public override Object InitializeLifetimeService()
         {
             ILease lease = (ILease)base.InitializeLifetimeService();
-
             if (lease.CurrentState == LeaseState.Initial)
             {
-                lease.InitialLeaseTime = TimeSpan.Zero;
+                lease.InitialLeaseTime = TimeSpan.FromMinutes(1);
+                lease.SponsorshipTimeout = TimeSpan.FromMinutes(2);
+                lease.RenewOnCallTime = TimeSpan.FromSeconds(2);
             }
             return lease;
         }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
new file mode 100644
index 0000000..87401bb
--- /dev/null
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/ScriptSponsor.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.Remoting.Lifetime;
+using System.Text;
+
+namespace OpenSim.Region.ScriptEngine.Shared.Api.Runtime
+{
+    public class ScriptSponsor: ISponsor
+    {
+        // In theory: I execute, therefore I am.
+        // If GC collects this class then sponsorship will expire
+        public TimeSpan Renewal(ILease lease)
+        {
+            return TimeSpan.FromMinutes(2);
+        }
+    }
+}
diff --git a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
index ad86494..2a8bba8 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
@@ -27,6 +27,8 @@
 
 using System;
 using System.IO;
+using System.Runtime.Remoting;
+using System.Runtime.Remoting.Lifetime;
 using System.Threading;
 using System.Collections;
 using System.Collections.Generic;
@@ -44,6 +46,7 @@ using OpenSim.Region.Environment.Scenes;
 using OpenSim.Region.Environment.Interfaces;
 using OpenSim.Region.ScriptEngine.Shared;
 using OpenSim.Region.ScriptEngine.Shared.Api;
+using OpenSim.Region.ScriptEngine.Shared.Api.Runtime;
 using OpenSim.Region.ScriptEngine.Shared.ScriptBase;
 using OpenSim.Region.ScriptEngine.Shared.CodeTools;
 using OpenSim.Region.ScriptEngine.Interfaces;
@@ -80,6 +83,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
         private int m_ControlEventsInQueue = 0;
         private int m_LastControlLevel = 0;
         private bool m_CollisionInQueue = false;
+        private ISponsor m_ScriptSponsor;
         private Dictionary<KeyValuePair<int, int>, KeyValuePair<int, int>>
                 m_LineMap;
 
@@ -204,6 +208,13 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
                 m_Script = (IScript)dom.CreateInstanceAndUnwrap(
                     Path.GetFileNameWithoutExtension(assembly),
                     "SecondLife.Script");
+
+                // Add a sponsor to the script
+                ISponsor scriptSponsor = new ScriptSponsor();
+                ILease lease = (ILease)RemotingServices.GetLifetimeService(m_Script as MarshalByRefObject);
+                lease.Register(scriptSponsor);
+                m_ScriptSponsor = scriptSponsor;
+
             }
             catch (Exception e)
             {
-- 
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