3 files changed, 79 insertions, 55 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index c12c81b..f5a1e74 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -310,7 +310,7 @@ namespace OpenSim.Region.Framework.Scenes
         private Thread HeartbeatThread;
         private volatile bool shuttingdown;
 
-        private int m_lastUpdate = Environment.TickCount;
+        private int m_lastUpdate;
         private bool m_firstHeartbeat = true;
 
         private UpdatePrioritizationSchemes m_update_prioritization_scheme = UpdatePrioritizationSchemes.Time;
@@ -526,6 +526,7 @@ namespace OpenSim.Region.Framework.Scenes
             m_regionHandle = m_regInfo.RegionHandle;
             m_regionName = m_regInfo.RegionName;
             m_datastore = m_regInfo.DataStore;
+            m_lastUpdate = Util.EnvironmentTickCount();
 
             m_physicalPrim = physicalPrim;
             m_seeIntoRegionFromNeighbor = SeeIntoRegionFromNeighbor;
@@ -735,6 +736,8 @@ namespace OpenSim.Region.Framework.Scenes
 
             m_regInfo = regInfo;
             m_eventManager = new EventManager();
+
+            m_lastUpdate = Util.EnvironmentTickCount();
         }
 
         #endregion
@@ -1101,7 +1104,7 @@ namespace OpenSim.Region.Framework.Scenes
                 HeartbeatThread.Abort();
                 HeartbeatThread = null;
             }
-            m_lastUpdate = Environment.TickCount;
+            m_lastUpdate = Util.EnvironmentTickCount();
 
             HeartbeatThread = Watchdog.StartThread(Heartbeat, "Heartbeat for region " + RegionInfo.RegionName, ThreadPriority.Normal, false);
         }
@@ -1142,7 +1145,7 @@ namespace OpenSim.Region.Framework.Scenes
             {
                 Update();
 
-                m_lastUpdate = Environment.TickCount;
+                m_lastUpdate = Util.EnvironmentTickCount();
                 m_firstHeartbeat = false;
             }
             catch (ThreadAbortException)
@@ -1170,8 +1173,9 @@ namespace OpenSim.Region.Framework.Scenes
                 TimeSpan SinceLastFrame = DateTime.UtcNow - m_lastupdate;
                 physicsFPS = 0f;
 
-                maintc = otherMS = Environment.TickCount;
+                maintc = Util.EnvironmentTickCount();
                 int tmpFrameMS = maintc;
+                tempOnRezMS = eventMS = backupMS = terrainMS = landMS = 0;
 
                 // Increment the frame counter
                 ++m_frame;
@@ -1191,16 +1195,15 @@ namespace OpenSim.Region.Framework.Scenes
                     if (m_frame % m_update_objects == 0)
                         m_sceneGraph.UpdateObjectGroups();
 
-                    int TempPhysicsMS2 = Environment.TickCount;
+                    int tmpPhysicsMS2 = Util.EnvironmentTickCount();
                     if ((m_frame % m_update_physics == 0) && m_physics_enabled)
                         m_sceneGraph.UpdatePreparePhysics();
-                    TempPhysicsMS2 = Environment.TickCount - TempPhysicsMS2;
-                    physicsMS2 = TempPhysicsMS2;
+                    physicsMS2 = Util.EnvironmentTickCountSubtract(tmpPhysicsMS2);
 
                     if (m_frame % m_update_entitymovement == 0)
                         m_sceneGraph.UpdateScenePresenceMovement();
 
-                    int TempPhysicsMS = Environment.TickCount;
+                    int tmpPhysicsMS = Util.EnvironmentTickCount();
                     if (m_frame % m_update_physics == 0)
                     {
                         if (m_physics_enabled)
@@ -1208,57 +1211,49 @@ namespace OpenSim.Region.Framework.Scenes
                         if (SynchronizeScene != null)
                             SynchronizeScene(this);
                     }
-                    TempPhysicsMS = Environment.TickCount - TempPhysicsMS;
-                    physicsMS = TempPhysicsMS;
+                    physicsMS = Util.EnvironmentTickCountSubtract(tmpPhysicsMS);
 
                     // Delete temp-on-rez stuff
                     if (m_frame % m_update_backup == 0)
                     {
-                        int tozMS = Environment.TickCount;
+                        int tmpTempOnRezMS = Util.EnvironmentTickCount();
                         CleanTempObjects();
-                        tozMS -= Environment.TickCount;
-                        tempOnRezMS = tozMS;
+                        tempOnRezMS = Util.EnvironmentTickCountSubtract(tmpTempOnRezMS);
                     }
 
                     if (RegionStatus != RegionStatus.SlaveScene)
                     {
                         if (m_frame % m_update_events == 0)
                         {
-                            int evMS = Environment.TickCount;
+                            int evMS = Util.EnvironmentTickCount();
                             UpdateEvents();
-                            evMS -= Environment.TickCount;
-                            eventMS = evMS;
+                            eventMS = Util.EnvironmentTickCountSubtract(evMS); ;
                         }
 
                         if (m_frame % m_update_backup == 0)
                         {
-                            int backMS = Environment.TickCount;
+                            int backMS = Util.EnvironmentTickCount();
                             UpdateStorageBackup();
-                            backMS -= Environment.TickCount;
-                            backupMS = backMS;
+                            backupMS = Util.EnvironmentTickCountSubtract(backMS);
                         }
 
                         if (m_frame % m_update_terrain == 0)
                         {
-                            int terMS = Environment.TickCount;
+                            int terMS = Util.EnvironmentTickCount();
                             UpdateTerrain();
-                            terMS -= Environment.TickCount;
-                            terrainMS = terMS;
+                            terrainMS = Util.EnvironmentTickCountSubtract(terMS);
                         }
 
                         if (m_frame % m_update_land == 0)
                         {
-                            int ldMS = Environment.TickCount;
+                            int ldMS = Util.EnvironmentTickCount();
                             UpdateLand();
-                            ldMS -= Environment.TickCount;
-                            landMS = ldMS;
+                            landMS = Util.EnvironmentTickCountSubtract(ldMS);
                         }
 
-                        int tickCount = Environment.TickCount;
-                        otherMS = tickCount - otherMS;
-                        tmpFrameMS -= tickCount;
-                        frameMS = tmpFrameMS;
-                        lastCompletedFrame = tickCount;
+                        frameMS = Util.EnvironmentTickCountSubtract(tmpFrameMS);
+                        otherMS = tempOnRezMS + eventMS + backupMS + terrainMS + landMS;
+                        lastCompletedFrame = Util.EnvironmentTickCount();
 
                         // if (m_frame%m_update_avatars == 0)
                         //   UpdateInWorldTime();
@@ -1311,8 +1306,8 @@ namespace OpenSim.Region.Framework.Scenes
                 {
                     m_lastupdate = DateTime.UtcNow;
                 }
-                
-                maintc = Environment.TickCount - maintc;
+
+                maintc = Util.EnvironmentTickCountSubtract(maintc);
                 maintc = (int)(m_timespan * 1000) - maintc;
 
                 if ((maintc < (m_timespan * 1000)) && maintc > 0)
@@ -1323,6 +1318,7 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        
 
         public void AddGroupTarget(SceneObjectGroup grp)
         {
@@ -2599,7 +2595,7 @@ namespace OpenSim.Region.Framework.Scenes
                 }
             }
 
-            m_LastLogin = Environment.TickCount;
+            m_LastLogin = Util.EnvironmentTickCount();
             EventManager.TriggerOnNewClient(client);
         }
 
@@ -4668,14 +4664,14 @@ namespace OpenSim.Region.Framework.Scenes
             //
             int health=1; // Start at 1, means we're up
 
-            if ((Environment.TickCount - m_lastUpdate) < 1000)
+            if ((Util.EnvironmentTickCountSubtract(m_lastUpdate)) < 1000)
                 health+=1;
             else
                 return health;
 
             // A login in the last 4 mins? We can't be doing too badly
             //
-            if ((Environment.TickCount - m_LastLogin) < 240000)
+            if ((Util.EnvironmentTickCountSubtract(m_LastLogin)) < 240000)
                 health++;
             else
                 return health;
@@ -4873,7 +4869,7 @@ namespace OpenSim.Region.Framework.Scenes
             if (m_firstHeartbeat)
                 return;
 
-            if (System.Environment.TickCount - m_lastUpdate > 2000)
+            if (Util.EnvironmentTickCountSubtract(m_lastUpdate) > 2000)
                 StartTimer();
         }
     }
diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index cebd108..6812914 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -790,13 +790,37 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void SendPrimUpdates()
         {
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
 
             m_sceneViewer.SendPrimUpdates();
 
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
+        /// <summary>
+        /// Environment.TickCount is an int but it counts all 32 bits so it goes positive
+        /// and negative every 24.9 days. This trims down TickCount so it doesn't wrap
+        /// for the callers. 
+        /// This trims it to a 12 day interval so don't let your frame time get too long.
+        /// </summary>
+        /// <returns></returns>
+        const Int32 EnvironmentTickCountMask = 0x3fffffff;
+        private static Int32 EnvironmentTickCount() {
+            return Environment.TickCount & EnvironmentTickCountMask;
+        }
+
+        /// <summary>
+        /// Environment.TickCount is an int but it counts all 32 bits so it goes positive
+        /// and negative every 24.9 days. Subtracts the passed value (previously fetched by
+        /// 'EnvironmentTickCount()') and accounts for any wrapping.
+        /// </summary>
+        /// <returns>subtraction of passed prevValue from current Environment.TickCount</returns>
+        private static Int32 EnvironmentTickCountSubtract(Int32 prevValue) {
+            Int32 diff = EnvironmentTickCount() - prevValue;
+            return (diff >= 0) ? diff : (diff + EnvironmentTickCountMask + 1);
+        }
+
+
         #region Status Methods
 
         /// <summary>
@@ -1184,7 +1208,8 @@ namespace OpenSim.Region.Framework.Scenes
             //    // m_log.Debug("DEBUG: HandleAgentUpdate: child agent");
             //    return;
             //}
-            m_perfMonMS = Environment.TickCount;
+
+            m_perfMonMS = EnvironmentTickCount();
 
             ++m_movementUpdateCount;
             if (m_movementUpdateCount < 1)
@@ -1514,7 +1539,7 @@ namespace OpenSim.Region.Framework.Scenes
 
             m_scene.EventManager.TriggerOnClientMovement(this);
 
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
         public void DoAutoPilot(uint not_used, Vector3 Pos, IClientAPI remote_client)
@@ -2032,7 +2057,7 @@ namespace OpenSim.Region.Framework.Scenes
                 return;
             }
 
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
 
             Rotation = rotation;
             Vector3 direc = vec * rotation;
@@ -2074,7 +2099,7 @@ namespace OpenSim.Region.Framework.Scenes
             // TODO: Add the force instead of only setting it to support multiple forces per frame?
             m_forceToApply = direc;
             m_isNudging = Nudging;
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCount() - m_perfMonMS);
         }
 
         #endregion
@@ -2143,7 +2168,7 @@ namespace OpenSim.Region.Framework.Scenes
             // server.
             if (remoteClient.IsActive)
             {
-                m_perfMonMS = Environment.TickCount;
+                m_perfMonMS = EnvironmentTickCount();
 
                 PhysicsActor actor = m_physicsActor;
                 Vector3 velocity = (actor != null) ? actor.Velocity : Vector3.Zero;
@@ -2156,7 +2181,7 @@ namespace OpenSim.Region.Framework.Scenes
                 remoteClient.SendAvatarTerseUpdate(new SendAvatarTerseData(m_rootRegionHandle, (ushort)(m_scene.TimeDilation * ushort.MaxValue), LocalId,
                     pos, velocity, Vector3.Zero, m_bodyRot, CollisionPlane, m_uuid, null, GetUpdatePriority(remoteClient)));
 
-                m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+                m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
                 m_scene.StatsReporter.AddAgentUpdates(1);
             }
         }
@@ -2166,11 +2191,11 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void SendTerseUpdateToAllClients()
         {
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
             
             m_scene.ForEachClient(SendTerseUpdateToClient);
 
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
         public void SendCoarseLocations()
@@ -2190,7 +2215,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void SendCoarseLocationsDefault(UUID sceneId, ScenePresence p)
         {
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
 
             List<Vector3> CoarseLocations = new List<Vector3>();
             List<UUID> AvatarUUIDs = new List<UUID>();
@@ -2226,7 +2251,7 @@ namespace OpenSim.Region.Framework.Scenes
 
             m_controllingClient.SendCoarseLocationUpdate(AvatarUUIDs, CoarseLocations);
 
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
         public void CoarseLocationChange()
@@ -2263,7 +2288,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void SendInitialFullUpdateToAllClients()
         {
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
 
             ScenePresence[] avatars = m_scene.GetScenePresences();
 
@@ -2289,14 +2314,14 @@ namespace OpenSim.Region.Framework.Scenes
             }
 
             m_scene.StatsReporter.AddAgentUpdates(avatars.Length);
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
 
             //Animator.SendAnimPack();
         }
 
         public void SendFullUpdateToAllClients()
         {
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
 
             // only send update from root agents to other clients; children are only "listening posts"
             List<ScenePresence> avatars = m_scene.GetAvatars();
@@ -2306,7 +2331,7 @@ namespace OpenSim.Region.Framework.Scenes
 
             }
             m_scene.StatsReporter.AddAgentUpdates(avatars.Count);
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
 
             Animator.SendAnimPack();
         }
@@ -2348,7 +2373,7 @@ namespace OpenSim.Region.Framework.Scenes
         /// </summary>
         public void SendAppearanceToAllOtherAgents()
         {
-            m_perfMonMS = Environment.TickCount;
+            m_perfMonMS = EnvironmentTickCount();
 
             m_scene.ForEachScenePresence(delegate(ScenePresence scenePresence)
                                          {
@@ -2358,7 +2383,7 @@ namespace OpenSim.Region.Framework.Scenes
                                              }
                                          });
             
-            m_scene.StatsReporter.AddAgentTime(Environment.TickCount - m_perfMonMS);
+            m_scene.StatsReporter.AddAgentTime(EnvironmentTickCountSubtract(m_perfMonMS));
         }
 
         /// <summary>
diff --git a/OpenSim/Region/Framework/Scenes/SimStatsReporter.cs b/OpenSim/Region/Framework/Scenes/SimStatsReporter.cs
index 3b5455f..f92f440 100644
--- a/OpenSim/Region/Framework/Scenes/SimStatsReporter.cs
+++ b/OpenSim/Region/Framework/Scenes/SimStatsReporter.cs
@@ -193,6 +193,9 @@ namespace OpenSim.Region.Framework.Scenes
                 // / 10 divides the value by the number of times the sim heartbeat runs (10fps)
                 // Then we divide the whole amount by the amount of seconds pass in between stats updates.
 
+                // 'statsUpdateFactor' is how often stats packets are sent in seconds. Used below to change
+                // values to X-per-second values.
+
                 for (int i = 0; i<21;i++)
                 {
                     sb[i] = new SimStatsPacket.StatBlock();
@@ -237,7 +240,7 @@ namespace OpenSim.Region.Framework.Scenes
                 sb[12].StatID = (uint)Stats.OtherMS;
                 sb[12].StatValue = m_otherMS / statsUpdateFactor;
 
-                sb[13].StatID = (uint)Stats.InPacketsPerSecond;
+                sb[13].StatID = (uint)Stats.InPacketsPerSecond;

                 sb[13].StatValue = (m_inPacketsPerSecond / statsUpdateFactor);
 
                 sb[14].StatID = (uint)Stats.OutPacketsPerSecond;