From 728fd0b1b8e1c80f6961ec06efb34727645fdc3e Mon Sep 17 00:00:00 2001
From: Justin Clark-Casey (justincc)
Date: Sat, 10 Sep 2011 01:09:17 +0100
Subject: lock attachments when enumerating through them in
 ScenePresence.CopyTo().

May have some effect on http://opensimulator.org/mantis/view.php?id=5644
---
 OpenSim/Region/Framework/Scenes/ScenePresence.cs | 44 +++++++++++++-----------
 1 file changed, 24 insertions(+), 20 deletions(-)

(limited to 'OpenSim/Region')

diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 18ad715..d65d78d 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -3141,26 +3141,30 @@ namespace OpenSim.Region.Framework.Scenes
             catch { }
 
             // Attachment objects
-            if (m_attachments != null && m_attachments.Count > 0)
-            {
-                cAgent.AttachmentObjects = new List<ISceneObject>();
-                cAgent.AttachmentObjectStates = new List<string>();
-//                IScriptModule se = m_scene.RequestModuleInterface<IScriptModule>();
-                m_InTransitScriptStates.Clear();
-                foreach (SceneObjectGroup sog in m_attachments)
-                {
-                    // We need to make a copy and pass that copy
-                    // because of transfers withn the same sim
-                    ISceneObject clone = sog.CloneForNewScene();
-                    // Attachment module assumes that GroupPosition holds the offsets...!
-                    ((SceneObjectGroup)clone).RootPart.GroupPosition = sog.RootPart.AttachedPos;
-                    ((SceneObjectGroup)clone).IsAttachment = false;
-                    cAgent.AttachmentObjects.Add(clone);
-                    string state = sog.GetStateSnapshot();
-                    cAgent.AttachmentObjectStates.Add(state);
-                    m_InTransitScriptStates.Add(state);
-                    // Let's remove the scripts of the original object here
-                    sog.RemoveScriptInstances(true);
+            lock (m_attachments)
+            {
+                if (m_attachments.Count > 0)
+                {
+                    cAgent.AttachmentObjects = new List<ISceneObject>();
+                    cAgent.AttachmentObjectStates = new List<string>();
+    //                IScriptModule se = m_scene.RequestModuleInterface<IScriptModule>();
+                    m_InTransitScriptStates.Clear();
+
+                    foreach (SceneObjectGroup sog in m_attachments)
+                    {
+                        // We need to make a copy and pass that copy
+                        // because of transfers withn the same sim
+                        ISceneObject clone = sog.CloneForNewScene();
+                        // Attachment module assumes that GroupPosition holds the offsets...!
+                        ((SceneObjectGroup)clone).RootPart.GroupPosition = sog.RootPart.AttachedPos;
+                        ((SceneObjectGroup)clone).IsAttachment = false;
+                        cAgent.AttachmentObjects.Add(clone);
+                        string state = sog.GetStateSnapshot();
+                        cAgent.AttachmentObjectStates.Add(state);
+                        m_InTransitScriptStates.Add(state);
+                        // Let's remove the scripts of the original object here
+                        sog.RemoveScriptInstances(true);
+                    }
                 }
             }
         }
-- 
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