Fix to existing ReaderWriterLockSlim implementations

2 files changed, 10 insertions, 3 deletions

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index 93888f1..eacd219 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -126,7 +126,10 @@ namespace OpenSim.Region.Framework.Scenes
             }
             else
             {
-                m_partsLock.ExitReadLock();
+                if (m_partsLock.RecursiveReadCount > 0)
+                {
+                    m_partsLock.ExitReadLock();
+                }
             }
         }
         public void lockPartsForWrite(bool locked)
@@ -155,7 +158,10 @@ namespace OpenSim.Region.Framework.Scenes
             }
             else
             {
-                m_partsLock.ExitWriteLock();
+                if (m_partsLock.RecursiveWriteCount > 0)
+                {
+                    m_partsLock.ExitWriteLock();
+                }
             }
         }
 
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
index 4780ff2..b57d912 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPartInventory.cs
@@ -320,17 +320,18 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 if (m_items.ContainsKey(itemId))
                 {
+                    m_items.LockItemsForRead(false);
                     CreateScriptInstance(m_items[itemId], startParam, postOnRez, engine, stateSource);
                 }
                 else
                 {
+                    m_items.LockItemsForRead(false);
                     m_log.ErrorFormat(
                         "[PRIM INVENTORY]: " +
                         "Couldn't start script with ID {0} since it couldn't be found for prim {1}, {2} at {3} in {4}",
                         itemId, m_part.Name, m_part.UUID, 
                         m_part.AbsolutePosition, m_part.ParentGroup.Scene.RegionInfo.RegionName);
                 }
-                m_items.LockItemsForRead(false);
             }
             else
             {