1 files changed, 30 insertions, 8 deletions

diff --git a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
index b7030f1..80d7598 100644
--- a/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
+++ b/OpenSim/Region/Physics/OdePlugin/OdePlugin.cs
@@ -156,10 +156,10 @@ namespace OpenSim.Region.Physics.OdePlugin
 
         private const uint m_regionWidth = Constants.RegionSize;
         private const uint m_regionHeight = Constants.RegionSize;
-
+        private bool IsLocked = false;
         private float ODE_STEPSIZE = 0.020f;
         private float metersInSpace = 29.9f;
-
+        private List<PhysicsActor> RemoveQueue;
         public float gravityx = 0f;
         public float gravityy = 0f;
         public float gravityz = -9.8f;
@@ -376,6 +376,7 @@ namespace OpenSim.Region.Physics.OdePlugin
         // Initialize the mesh plugin
         public override void Initialise(IMesher meshmerizer, IConfigSource config)
         {
+            RemoveQueue = new List<PhysicsActor>();
             mesher = meshmerizer;
             m_config = config;
             // Defaults
@@ -2047,13 +2048,21 @@ namespace OpenSim.Region.Physics.OdePlugin
         {
             if (prim is OdePrim)
             {
-                lock (OdeLock)
+                if (!IsLocked) //Fix a deadlock situation.. have we been locked by Simulate?
                 {
-                    OdePrim p = (OdePrim) prim;
+                    lock (OdeLock)
+                    {
+                        OdePrim p = (OdePrim)prim;
 
-                    p.setPrimForRemoval();
-                    AddPhysicsActorTaint(prim);
-                    //RemovePrimThreadLocked(p);
+                        p.setPrimForRemoval();
+                        AddPhysicsActorTaint(prim);
+                        //RemovePrimThreadLocked(p);
+                    }
+                }
+                else
+                {
+                    //Add the prim to a queue which will be removed when Simulate has finished what it's doing.
+                    RemoveQueue.Add(prim);
                 }
             }
         }
@@ -2575,7 +2584,7 @@ namespace OpenSim.Region.Physics.OdePlugin
                 DeleteRequestedJoints(); // this must be outside of the lock (OdeLock) to avoid deadlocks
                 CreateRequestedJoints(); // this must be outside of the lock (OdeLock) to avoid deadlocks
             }
-
+            IsLocked = true;
             lock (OdeLock)
             {
                 // Process 10 frames if the sim is running normal..
@@ -2988,6 +2997,19 @@ namespace OpenSim.Region.Physics.OdePlugin
                     d.WorldExportDIF(world, fname, physics_logging_append_existing_logfile, prefix);
                 }
             }
+            IsLocked = false;
+            if (RemoveQueue.Count > 0)
+            {
+                do
+                {
+                    if (RemoveQueue[0] != null)
+                    {
+                        RemovePrimThreadLocked((OdePrim)RemoveQueue[0]);
+                    }
+                    RemoveQueue.RemoveAt(0);
+                } 
+                while (RemoveQueue.Count > 0);
+            }
 
             return fps;
         }