From e2ab576572a3ca7ab1f29fc142624ae257f5289d Mon Sep 17 00:00:00 2001
From: Justin Clarke Casey
Date: Wed, 12 Nov 2008 18:12:18 +0000
Subject: * Stop locking the scene presences dictionary for the entire agent
 crossing part of the login sequence * This may alleviate a little the
 freezing experienced by existing avatars when a new client logs in * Race
 condition risks look minimal since one wouldn't expect another thread to
 start fiddling with that presence

---
 OpenSim/Region/Environment/Scenes/Scene.cs | 32 +++++++++++++++++++-----------
 1 file changed, 20 insertions(+), 12 deletions(-)

(limited to 'OpenSim/Region/Environment/Scenes')

diff --git a/OpenSim/Region/Environment/Scenes/Scene.cs b/OpenSim/Region/Environment/Scenes/Scene.cs
index 326380b..ceadf7a 100644
--- a/OpenSim/Region/Environment/Scenes/Scene.cs
+++ b/OpenSim/Region/Environment/Scenes/Scene.cs
@@ -2863,7 +2863,7 @@ namespace OpenSim.Region.Environment.Scenes
         }
 
         /// <summary>
-        ///
+        /// Triggered when an agent crosses into this sim.  Also happens on initial login.
         /// </summary>
         /// <param name="regionHandle"></param>
         /// <param name="agentID"></param>
@@ -2873,22 +2873,30 @@ namespace OpenSim.Region.Environment.Scenes
         {
             if (regionHandle == m_regInfo.RegionHandle)
             {
+                ScenePresence presence;
+                
                 lock (m_scenePresences)
                 {
-                    if (m_scenePresences.ContainsKey(agentID))
+                    m_scenePresences.TryGetValue(agentID, out presence);
+                }
+                
+                if (presence != null)
+                {
+                    try
                     {
-                        try
-                        {
-                            m_scenePresences[agentID].MakeRootAgent(position, isFlying);
-                        }
-                        catch (Exception e)
-                        {
-                            m_log.Info("[SCENE]: Unable to do Agent Crossing.");
-                            m_log.Debug("[SCENE]: " + e.ToString());
-                        }
-                        //m_innerScene.SwapRootChildAgent(false);
+                        presence.MakeRootAgent(position, isFlying);
+                    }
+                    catch (Exception e)
+                    {
+                        m_log.ErrorFormat("[SCENE]: Unable to do agent crossing, exception {0}", e);
                     }
                 }
+                else
+                {
+                    m_log.ErrorFormat(
+                        "[SCENE]: Could not find presence for agent {0} crossing into scene {1}",
+                        agentID, RegionInfo.RegionName);
+                }
             }
         }
 
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