* Restaring the sim works fine in grid mode now. Sims announce themselves to their neighbors when they start up. Neighbors get this message and tell their agents that there's a new sim up.

* Certain unrecoverable physics based crashes in ODE are now hooked up to the 'restart the sim' routine.

OpenSim/Region/Environment/Scenes/InnerScene.cs

@@ -11,8 +11,14 @@ using OpenSim.Region.Physics.Manager;
 
 namespace OpenSim.Region.Environment.Scenes
 {
+    public delegate void PhysicsCrash();
+
     public class InnerScene
     {
+        #region Events
+        public event PhysicsCrash UnRecoverableError;
+        #endregion
+
         #region Fields
         public Dictionary<LLUUID, ScenePresence> ScenePresences;
         public Dictionary<LLUUID, SceneObjectGroup> SceneObjects;
@@ -26,17 +32,47 @@ namespace OpenSim.Region.Environment.Scenes
 
         internal object m_syncRoot = new object();
 
-        public PhysicsScene PhyScene;
+        public PhysicsScene _PhyScene;
         #endregion
 
         public InnerScene(Scene parent, RegionInfo regInfo, PermissionManager permissionsMngr)
         {
+
             m_parentScene = parent;
             m_regInfo = regInfo;
             PermissionsMngr = permissionsMngr;
             QuadTree = new BasicQuadTreeNode(null, "/0/", 0, 0, 256, 256);
             QuadTree.Subdivide();
             QuadTree.Subdivide();
+            
+
+        }
+        public PhysicsScene PhyScene
+        {
+            get
+            { return _PhyScene; }
+            set
+            {
+                // If we're not doing the initial set
+                // Then we've got to remove the previous 
+                // event handler
+                    try
+                    {
+                        _PhyScene.OnPhysicsCrash -= physicsBasedCrash;
+                    }
+                    catch (System.NullReferenceException)
+                    {
+                        // This occurs when storing to _PhyScene the first time.
+                        // Is there a better way to check the event handler before
+                        // getting here
+                        // This can be safely ignored.  We're setting the first inital 
+                        // there are no event handler's registered.
+                    }
+                
+                _PhyScene = value;
+                
+                _PhyScene.OnPhysicsCrash += physicsBasedCrash;
+            }
         }
 
         public void Close()
@@ -55,9 +91,9 @@ namespace OpenSim.Region.Environment.Scenes
 
             // PhysX does this (runs in the background).
 
-            if (PhyScene.IsThreaded)
+            if (_PhyScene.IsThreaded)
             {
-                PhyScene.GetResults();
+                _PhyScene.GetResults();
             }
         }
 
@@ -75,7 +111,7 @@ namespace OpenSim.Region.Environment.Scenes
         {
             lock (m_syncRoot)
             {
-                PhyScene.Simulate((float)elapsed);
+                _PhyScene.Simulate((float)elapsed);
             }
         }
 
@@ -338,6 +374,15 @@ namespace OpenSim.Region.Environment.Scenes
 
         #region Other Methods
 
+
+        public void physicsBasedCrash()
+        {
+            if (UnRecoverableError != null)
+            {
+                UnRecoverableError();
+            }
+        }
+
         public LLUUID ConvertLocalIDToFullID(uint localID)
         {
             SceneObjectGroup group = GetGroupByPrim(localID);

OpenSim/Region/Environment/Scenes/Scene.cs

@@ -232,6 +232,15 @@ namespace OpenSim.Region.Environment.Scenes
             m_permissionManager.Initialise(this);
 
             m_innerScene = new InnerScene(this, m_regInfo, m_permissionManager);
+            
+            // If the Inner scene has an Unrecoverable error, restart this sim.
+            // Currently the only thing that causes it to happen is two kinds of specific
+            // Physics based crashes.
+            //
+            // Out of memory
+            // Operating system has killed the plugin
+            m_innerScene.UnRecoverableError += restartNOW;
+
             m_sceneXmlLoader = new SceneXmlLoader(this, m_innerScene, m_regInfo);
 
             RegisterDefaultSceneEvents();
@@ -315,13 +324,17 @@ namespace OpenSim.Region.Environment.Scenes
             {
                 t_restartTimer.Stop();
                 t_restartTimer.AutoReset = false;
-                MainLog.Instance.Error("REGION", "Closing");
-                Close();
-                MainLog.Instance.Error("REGION", "Firing Region Restart Message");
-                base.Restart(0);
+                restartNOW();
             }
             
         }
+        public void restartNOW()
+        {
+            MainLog.Instance.Error("REGION", "Closing");
+            Close();
+            MainLog.Instance.Error("REGION", "Firing Region Restart Message");
+            base.Restart(0);
+        }
         public void restart_Notify_Wait_Elapsed(object sender, ElapsedEventArgs e)
         { 
             m_restartWaitTimer.Stop();

OpenSim/Region/Environment/Scenes/SceneCommunicationService.cs

@@ -171,6 +171,18 @@ namespace OpenSim.Region.Environment.Scenes
             }
         }
 
+        public void RequestNeighbors(RegionInfo region)
+        {
+            List<SimpleRegionInfo> neighbours =
+                m_commsProvider.GridService.RequestNeighbours(m_regionInfo.RegionLocX, m_regionInfo.RegionLocY);
+            //IPEndPoint blah = new IPEndPoint();
+            
+            //blah.Address = region.RemotingAddress;
+            //blah.Port = region.RemotingPort;
+           
+
+        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -311,7 +323,7 @@ namespace OpenSim.Region.Environment.Scenes
         public void InformNeighborsThatRegionisUp(RegionInfo region)
         {
             //MainLog.Instance.Verbose("INTER", debugRegionName + ": SceneCommunicationService: Sending InterRegion Notification that region is up " + region.RegionName);
-            bool val = m_commsProvider.InterRegion.RegionUp(region);
+            bool val = m_commsProvider.InterRegion.RegionUp(new SearializableRegionInfo(region));
         }
 
         public bool PrimCrossToNeighboringRegion(ulong regionhandle, LLUUID primID, LLVector3 position, bool isPhysical)

OpenSim/Region/Environment/Scenes/SceneManager.cs

@@ -216,7 +216,7 @@ namespace OpenSim.Region.Environment.Scenes
 
         public void RestartCurrentScene()
         {
-            ForEachCurrentScene(delegate(Scene scene) { scene.Restart(15); });
+            ForEachCurrentScene(delegate(Scene scene) { scene.restartNOW(); });
 
         }