From fc3e7fe700dc30f46db9ded05e2e6ab75e6e81e4 Mon Sep 17 00:00:00 2001
From: Marck <marck00@nexgo.de>
Date: Mon, 1 Nov 2010 13:07:24 +0100
Subject: [PATCH] Fix HypergridLinker.Check4096()

Make the optimization with IEnumerable.Except() in Check4096 actually work by providing an appropriate equality definition for GridRegion objects.
---
 OpenSim/Services/Interfaces/IGridService.cs | 29 ++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/OpenSim/Services/Interfaces/IGridService.cs b/OpenSim/Services/Interfaces/IGridService.cs
index 77230a33d7..ee062256c5 100644
--- a/OpenSim/Services/Interfaces/IGridService.cs
+++ b/OpenSim/Services/Interfaces/IGridService.cs
@@ -97,7 +97,7 @@ namespace OpenSim.Services.Interfaces
         int GetRegionFlags(UUID scopeID, UUID regionID);
     }
 
-    public class GridRegion
+    public class GridRegion : Object
     {
 
         /// <summary>
@@ -225,6 +225,33 @@ namespace OpenSim.Services.Interfaces
             EstateOwner = ConvertFrom.EstateOwner;
         }
 
+        # region Definition of equality
+
+        /// <summary>
+        /// Define equality as two regions having the same, non-zero UUID.
+        /// </summary>
+        public bool Equals(GridRegion region)
+        {
+            if ((object)region == null)
+                return false;
+            // Return true if the non-zero UUIDs are equal:
+            return (RegionID != UUID.Zero) && RegionID.Equals(region.RegionID);
+        }
+
+        public override bool Equals(Object obj)
+        {
+            if (obj == null)
+                return false;
+            return Equals(obj as GridRegion);
+        }
+
+        public override int GetHashCode()
+        {
+            return RegionID.GetHashCode() ^ TerrainImage.GetHashCode();
+        }
+
+        #endregion
+
         /// <value>
         /// This accessor can throw all the exceptions that Dns.GetHostAddresses can throw.
         ///