Revert "Implement co-operative script termination if termination comes during a script wait event (llSleep(), etc.)"

Doing this as a favour to Melanie.  This will be back with passing the wait handles directly to the api.

This reverts commit 1b5c41c14ad11325be249ea1cce3c65d4d6a89be.

6 files changed, 10 insertions, 266 deletions

diff --git a/OpenSim/Region/ScriptEngine/Interfaces/IScriptInstance.cs b/OpenSim/Region/ScriptEngine/Interfaces/IScriptInstance.cs
index 38fff52..9de2d72 100644
--- a/OpenSim/Region/ScriptEngine/Interfaces/IScriptInstance.cs
+++ b/OpenSim/Region/ScriptEngine/Interfaces/IScriptInstance.cs
@@ -28,7 +28,6 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Threading;
 using OpenMetaverse;
 using log4net;
 using OpenSim.Framework;
@@ -182,18 +181,6 @@ namespace OpenSim.Region.ScriptEngine.Interfaces
         void Resume();
 
         /// <summary>
-        /// If true then scripts should look to terminate their threads in co-operation with the script engine rather
-        /// than through Thread.Abort()
-        /// </summary>
-        bool CoopTermination { get; }
-
-        /// <summary>
-        /// Used for script sleeps when we are using co-operative script termination.
-        /// </summary>
-        /// <remarks>null if CoopTermination is not active</remarks>  
-        EventWaitHandle CoopSleepHandle { get; }
-
-        /// <summary>
         /// Process the next event queued for this script instance.
         /// </summary>
         /// <returns></returns>
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index b992efa..44072c6 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -83,12 +83,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
     public class LSL_Api : MarshalByRefObject, ILSL_Api, IScriptApi
     {
         private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
-
-        /// <summary>
-        /// Instance of this script.
-        /// </summary>
-        protected IScriptInstance m_scriptInstance;
-
         protected IScriptEngine m_ScriptEngine;
         protected SceneObjectPart m_host;
 
@@ -118,12 +112,11 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
         public void Initialize(IScriptInstance scriptInstance)
         {
-            m_scriptInstance = scriptInstance;
-            m_ScriptEngine = m_scriptInstance.Engine;
-            m_host = m_scriptInstance.Part;
-            m_item = m_scriptInstance.ScriptTask;
+            m_ScriptEngine = scriptInstance.Engine;
+            m_host = scriptInstance.Part;
+            m_item = scriptInstance.ScriptTask;
 
-            LoadConfig();
+            LoadLimits();  // read script limits from config.
 
             m_TransferModule =
                     m_ScriptEngine.World.RequestModuleInterface<IMessageTransferModule>();
@@ -136,7 +129,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         /// <summary>
         /// Load configuration items that affect script, object and run-time behavior. */
         /// </summary>
-        private void LoadConfig()
+        private void LoadLimits()
         {
             m_ScriptDelayFactor =
                 m_ScriptEngine.Config.GetFloat("ScriptDelayFactor", 1.0f);
@@ -182,16 +175,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             delay = (int)((float)delay * m_ScriptDelayFactor);
             if (delay == 0)
                 return;
-
-            Sleep(delay);
-        }
-
-        protected virtual void Sleep(int delay)
-        {
-            if (!m_scriptInstance.CoopTermination)
-                System.Threading.Thread.Sleep(delay);
-            else if (m_scriptInstance.CoopSleepHandle.WaitOne(delay))
-                throw new ScriptCoopStopException();
+            System.Threading.Thread.Sleep(delay);
         }
 
         public Scene World
@@ -2930,8 +2914,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         {
 //            m_log.Info("llSleep snoozing " + sec + "s.");
             m_host.AddScriptLPS(1);
-
-            Sleep((int)(sec * 1000));
+            Thread.Sleep((int)(sec * 1000));
         }
 
         public LSL_Float llGetMass()
diff --git a/OpenSim/Region/ScriptEngine/Shared/Helpers.cs b/OpenSim/Region/ScriptEngine/Shared/Helpers.cs
index e02d35e..5a58f73 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Helpers.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Helpers.cs
@@ -81,24 +81,6 @@ namespace OpenSim.Region.ScriptEngine.Shared
         }
     }
 
-    /// <summary>
-    /// Used to signal when the script is stopping in co-operation with the script engine 
-    /// (instead of through Thread.Abort()).
-    /// </summary>
-    [Serializable]
-    public class ScriptCoopStopException : Exception
-    {
-        public ScriptCoopStopException()
-        {
-        }
-
-        protected ScriptCoopStopException(
-                SerializationInfo info, 
-                StreamingContext context)
-        {
-        }
-    }
-
     public class DetectParams
     {
         public const int AGENT = 1;
diff --git a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
index 00048a1..a2ff51b 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs
@@ -200,10 +200,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
 
         public static readonly long MaxMeasurementPeriod = 30 * TimeSpan.TicksPerMinute;
 
-        public bool CoopTermination { get; private set; }
- 
-        public EventWaitHandle CoopSleepHandle { get; private set; }
-
         public void ClearQueue()
         {
             m_TimerQueued = false;
@@ -237,12 +233,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
             m_postOnRez = postOnRez;
             m_AttachedAvatar = Part.ParentGroup.AttachedAvatar;
             m_RegionID = Part.ParentGroup.Scene.RegionInfo.RegionID;
-
-            if (Engine.Config.GetString("ScriptStopStrategy", "abort") == "co-op")
-            {
-                CoopTermination = true;
-                CoopSleepHandle = new AutoResetEvent(false);
-            }
         }
 
         /// <summary>
@@ -542,34 +532,9 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
             }
 
             // Wait for the current event to complete.
-            if (!m_InSelfDelete)
+            if (!m_InSelfDelete && workItem.Wait(new TimeSpan((long)timeout * 100000)))
             {
-                if (!CoopTermination)
-                {
-                    // If we're not co-operative terminating then try and wait for the event to complete before stopping
-                    if (workItem.Wait(new TimeSpan((long)timeout * 100000)))
-                        return true;
-                }
-                else
-                {
-                    m_log.DebugFormat(
-                        "[SCRIPT INSTANCE]: Co-operatively stopping script {0} {1} in {2} {3}",
-                        ScriptName, ItemID, PrimName, ObjectID);
-
-                    // This will terminate the event on next handle check by the script.
-                    CoopSleepHandle.Set();
-
-                    // For now, we will wait forever since the event should always cleanly terminate once LSL loop
-                    // checking is implemented.  May want to allow a shorter timeout option later.
-                    if (workItem.Wait(TimeSpan.MaxValue))
-                    {
-                        m_log.DebugFormat(
-                            "[SCRIPT INSTANCE]: Co-operatively stopped script {0} {1} in {2} {3}",
-                            ScriptName, ItemID, PrimName, ObjectID);
-
-                        return true;
-                    }
-                }
+                return true;
             }
 
             lock (EventQueue)
@@ -582,7 +547,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
 
             // If the event still hasn't stopped and we the stop isn't the result of script or object removal, then
             // forcibly abort the work item (this aborts the underlying thread).
-            // Co-operative termination should never reach this point.
             if (!m_InSelfDelete)
             {
                 m_log.DebugFormat(
@@ -822,11 +786,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
                             m_InEvent = false;
                             m_CurrentEvent = String.Empty;
 
-                            if ((!(e is TargetInvocationException) 
-                                || (!(e.InnerException is SelfDeleteException) 
-                                    && !(e.InnerException is ScriptDeleteException)
-                                    && !(e.InnerException is ScriptCoopStopException))) 
-                                && !(e is ThreadAbortException))
+                            if ((!(e is TargetInvocationException) || (!(e.InnerException is SelfDeleteException) && !(e.InnerException is ScriptDeleteException))) && !(e is ThreadAbortException))
                             {
                                 try
                                 {
@@ -874,12 +834,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
                                 m_InSelfDelete = true;
                                 Part.Inventory.RemoveInventoryItem(ItemID);
                             }
-                            else if ((e is TargetInvocationException) && (e.InnerException is ScriptCoopStopException))
-                            {
-                                m_log.DebugFormat(
-                                    "[SCRIPT INSTANCE]: Script {0}.{1} in event {2}, state {3} stopped co-operatively.",
-                                    PrimName, ScriptName, data.EventName, State);
-                            }
                         }
                     }
                 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Instance/Tests/CoopTerminationTests.cs b/OpenSim/Region/ScriptEngine/Shared/Instance/Tests/CoopTerminationTests.cs
deleted file mode 100644
index f3a6cc9..0000000
--- a/OpenSim/Region/ScriptEngine/Shared/Instance/Tests/CoopTerminationTests.cs
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright (c) Contributors, http://opensimulator.org/
- * See CONTRIBUTORS.TXT for a full list of copyright holders.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in the
- *       documentation and/or other materials provided with the distribution.
- *     * Neither the name of the OpenSimulator Project nor the
- *       names of its contributors may be used to endorse or promote products
- *       derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-using System;
-using System.Collections.Generic;
-using System.Threading;
-using Nini.Config;
-using NUnit.Framework;
-using OpenMetaverse;
-using OpenSim.Framework;
-using OpenSim.Region.CoreModules.Scripting.WorldComm;
-using OpenSim.Region.Framework.Scenes;
-using OpenSim.Region.Framework.Interfaces;
-using OpenSim.Region.ScriptEngine.XEngine;
-using OpenSim.Tests.Common;
-using OpenSim.Tests.Common.Mock;
-
-namespace OpenSim.Region.ScriptEngine.Shared.Instance.Tests
-{
-    /// <summary>
-    /// Test that co-operative script thread termination is working correctly.
-    /// </summary>
-    [TestFixture]
-    public class CoopTerminationTests : OpenSimTestCase
-    {
-        private TestScene m_scene;
-        private OpenSim.Region.ScriptEngine.XEngine.XEngine m_xEngine;
-
-        private AutoResetEvent m_chatEvent = new AutoResetEvent(false);
-        private AutoResetEvent m_stoppedEvent = new AutoResetEvent(false);
-
-        private OSChatMessage m_osChatMessageReceived;
-
-        [TestFixtureSetUp]
-        public void Init()
-        {
-            //AppDomain.CurrentDomain.SetData("APPBASE", Environment.CurrentDirectory + "/bin");
-//            Console.WriteLine(AppDomain.CurrentDomain.BaseDirectory);
-            m_xEngine = new OpenSim.Region.ScriptEngine.XEngine.XEngine();
-
-            IniConfigSource configSource = new IniConfigSource();
-            
-            IConfig startupConfig = configSource.AddConfig("Startup");
-            startupConfig.Set("DefaultScriptEngine", "XEngine");
-
-            IConfig xEngineConfig = configSource.AddConfig("XEngine");
-            xEngineConfig.Set("Enabled", "true");
-            xEngineConfig.Set("StartDelay", "0");
-
-            // These tests will not run with AppDomainLoading = true, at least on mono.  For unknown reasons, the call
-            // to AssemblyResolver.OnAssemblyResolve fails.
-            xEngineConfig.Set("AppDomainLoading", "false");
-
-            xEngineConfig.Set("ScriptStopStrategy", "co-op");
-
-            m_scene = new SceneHelpers().SetupScene("My Test", UUID.Random(), 1000, 1000, configSource);
-            SceneHelpers.SetupSceneModules(m_scene, configSource, m_xEngine);
-            m_scene.StartScripts();
-        }
-
-        /// <summary>
-        /// Test co-operative termination on derez of an object containing a script with a long-running event.
-        /// </summary>
-        /// <remarks>
-        /// TODO: Actually compiling the script is incidental to this test.  Really want a way to compile test scripts
-        /// within the build itself.
-        /// </remarks>
-        [Test]
-        public void TestStopOnLongSleep()
-        {
-            TestHelpers.InMethod();
-            TestHelpers.EnableLogging();
-
-            UUID userId = TestHelpers.ParseTail(0x1);
-//            UUID objectId = TestHelpers.ParseTail(0x100);
-//            UUID itemId = TestHelpers.ParseTail(0x3);
-            string itemName = "TestStopOnObjectDerezLongSleep() Item";
-
-            SceneObjectGroup so = SceneHelpers.CreateSceneObject(1, userId, "TestStopOnObjectDerezLongSleep", 0x100);
-            m_scene.AddNewSceneObject(so, true);
-
-            InventoryItemBase itemTemplate = new InventoryItemBase();
-//            itemTemplate.ID = itemId;
-            itemTemplate.Name = itemName;
-            itemTemplate.Folder = so.UUID;
-            itemTemplate.InvType = (int)InventoryType.LSL;
-
-            m_scene.EventManager.OnChatFromWorld += OnChatFromWorld;
-
-            SceneObjectPart partWhereRezzed = m_scene.RezNewScript(userId, itemTemplate, 
-@"default
-{    
-    state_entry()
-    {
-        llSay(0, ""Thin Lizzy"");
-        llSleep(60);
-    }
-}");
-
-            TaskInventoryItem rezzedItem = partWhereRezzed.Inventory.GetInventoryItem(itemName);
-
-            // Wait for the script to start the event before we try stopping it.
-            m_chatEvent.WaitOne(60000);
-
-            Console.WriteLine("Script started with message [{0}]", m_osChatMessageReceived.Message);
-
-            // FIXME: This is a very poor way of trying to avoid a low-probability race condition where the script
-            // executes llSay() but has not started the sleep before we try to stop it.
-            Thread.Sleep(1000);
-
-            // We need a way of carrying on if StopScript() fail, since it won't return if the script isn't actually
-            // stopped.  This kind of multi-threading is far from ideal in a regression test.
-            new Thread(() => { m_xEngine.StopScript(rezzedItem.ItemID); m_stoppedEvent.Set(); }).Start();
-
-            if (!m_stoppedEvent.WaitOne(30000))
-                Assert.Fail("Script did not co-operatively stop.");
-
-            bool running;
-            TaskInventoryItem scriptItem = partWhereRezzed.Inventory.GetInventoryItem(itemName);
-            Assert.That(
-                SceneObjectPartInventory.TryGetScriptInstanceRunning(m_scene, scriptItem, out running), Is.True);
-            Assert.That(running, Is.False);
-        }
-
-        private void OnChatFromWorld(object sender, OSChatMessage oscm)
-        {
-//            Console.WriteLine("Got chat [{0}]", oscm.Message);
-
-            m_osChatMessageReceived = oscm;
-            m_chatEvent.Set();
-        }
-    }
-}
\ No newline at end of file
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index a17a018..186ae04 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -1716,14 +1716,9 @@ namespace OpenSim.Region.ScriptEngine.XEngine
             IScriptInstance instance = GetInstance(itemID);
 
             if (instance != null)
-            {
                 instance.Stop(m_WaitForEventCompletionOnScriptStop);
-            }
             else
-            {
-//                m_log.DebugFormat("[XENGINE]: Could not find script with ID {0} to stop in {1}", itemID, World.Name);
                 m_runFlags.AddOrUpdate(itemID, false, 240);
-            }
         }
 
         public DetectParams GetDetectParams(UUID itemID, int idx)