Inconsistent locking of ScenePresence array in SceneGraph. Fixed by eliminating option to return the actual list. Callers can now either request a copy of the array as a new List or ask the SceneGraph to call a delegate function on every ScenePresence. Iteration and locking of the ScenePresences now takes place only within the SceneGraph class.

This patch also applies a fix to Combat/CombatModule.cs which had unlocked iteration of the ScenePresences and inconsistent try/catch around the use of those ScenePresences.

1 files changed, 5 insertions, 12 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneManager.cs b/OpenSim/Region/Framework/Scenes/SceneManager.cs
index 680c39a..a955532 100644
--- a/OpenSim/Region/Framework/Scenes/SceneManager.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneManager.cs
@@ -414,12 +414,8 @@ namespace OpenSim.Region.Framework.Scenes
             ForEachCurrentScene(
                 delegate(Scene scene)
                 {
-                    ScenePresence[] scenePresences = scene.GetScenePresences();
-
-                    for (int i = 0; i < scenePresences.Length; i++)
+                    scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
                     {
-                        ScenePresence scenePresence = scenePresences[i];
-
                         if (!scenePresence.IsChildAgent)
                         {
                             m_log.DebugFormat("Packet debug for {0} {1} set to {2}",
@@ -429,7 +425,7 @@ namespace OpenSim.Region.Framework.Scenes
 
                             scenePresence.ControllingClient.SetDebugPacketLevel(newDebug);
                         }
-                    }
+                    });
                 }
             );
         }
@@ -441,14 +437,11 @@ namespace OpenSim.Region.Framework.Scenes
             ForEachCurrentScene(
                 delegate(Scene scene)
                 {
-                    ScenePresence[] scenePresences = scene.GetScenePresences();
-
-                    for (int i = 0; i < scenePresences.Length; i++)
+                    scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
                     {
-                        ScenePresence scenePresence = scenePresences[i];
                         if (!scenePresence.IsChildAgent)
                             avatars.Add(scenePresence);
-                    }
+                    });
                 }
             );
 
@@ -461,7 +454,7 @@ namespace OpenSim.Region.Framework.Scenes
 
             ForEachCurrentScene(delegate(Scene scene)
             {
-                ScenePresence[] scenePresences = scene.GetScenePresences();
+                List<ScenePresence> scenePresences = scene.GetScenePresences();
                 presences.AddRange(scenePresences);
             });