aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
blob: 8ad81105cfa8f3b4bf446a59133177b30f162d64 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
/*
 * 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 OpenSim 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.IO;
using System.Threading;
using System.Collections;
using System.Collections.Generic;
using System.Security.Policy;
using System.Reflection;
using System.Globalization;
using System.Xml;
using libsecondlife;
using log4net;
using Nini.Config;
using Amib.Threading;
using OpenSim.Framework;
using OpenSim.Region.Environment;
using OpenSim.Region.Environment.Scenes;
using OpenSim.Region.Environment.Interfaces;
using OpenSim.Region.ScriptEngine.Shared;
using OpenSim.Region.ScriptEngine.Shared.Api;
using OpenSim.Region.ScriptEngine.Shared.ScriptBase;
using OpenSim.Region.ScriptEngine.Shared.CodeTools;
using OpenSim.Region.ScriptEngine.Shared.Instance;
using OpenSim.Region.ScriptEngine.Interfaces;

namespace OpenSim.Region.ScriptEngine.XEngine
{
    public class XEngine : IScriptModule, IScriptEngine
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private SmartThreadPool m_ThreadPool;
        private int m_MaxScriptQueue;
        private Scene m_Scene;
        private IConfig m_ScriptConfig;
        private Compiler m_Compiler;

// disable warning: need to keep a reference to XEngine.EventManager
// alive to avoid it being garbage collected
#pragma warning disable 414
        private EventManager m_EventManager;
#pragma warning restore 414
        private int m_EventLimit;
        private bool m_KillTimedOutScripts;
        private AsyncCommandManager m_AsyncCommands;
        bool m_firstStart = true;

        private static List<XEngine> m_ScriptEngines =
                new List<XEngine>();

        // Maps the local id to the script inventory items in it

        private Dictionary<uint, List<LLUUID> > m_PrimObjects =
                new Dictionary<uint, List<LLUUID> >();

        // Maps the LLUUID above to the script instance

        private Dictionary<LLUUID, IScriptInstance> m_Scripts =
                new Dictionary<LLUUID, IScriptInstance>();

        // Maps the asset ID to the assembly

        private Dictionary<LLUUID, string> m_Assemblies =
                new Dictionary<LLUUID, string>();

        // This will list AppDomains by script asset

        private Dictionary<LLUUID, AppDomain> m_AppDomains =
                new Dictionary<LLUUID, AppDomain>();

        // List the scripts running in each appdomain

        private Dictionary<LLUUID, List<LLUUID> > m_DomainScripts =
                new Dictionary<LLUUID, List<LLUUID> >();

        private Queue m_CompileQueue = new Queue(100);
        IWorkItemResult m_CurrentCompile = null;

        public string ScriptEngineName
        {
            get { return "XEngine"; }
        }

        public Scene World
        {
            get { return m_Scene; }
        }

        public ILog Log
        {
            get { return m_log; }
        }

        public static List<XEngine> ScriptEngines
        {
            get { return m_ScriptEngines; }
        }

        // private struct RezScriptParms
        // {
        //     uint LocalID;
        //     LLUUID ItemID;
        //     string Script;
        // }

        public IConfig Config
        {
            get { return m_ScriptConfig; }
        }

        public Object AsyncCommands
        {
            get { return (Object)m_AsyncCommands; }
        }

        //
        // IRegionModule functions
        //
        public void Initialise(Scene scene, IConfigSource configSource)
        {
            AppDomain.CurrentDomain.AssemblyResolve +=
                OnAssemblyResolve;

            m_log.InfoFormat("[XEngine] Initializing scripts in region {0}",
                             scene.RegionInfo.RegionName);
            m_Scene = scene;

            m_ScriptConfig = configSource.Configs["XEngine"];

            if (m_ScriptConfig == null)
            {
                m_log.ErrorFormat("[XEngine] No script configuration found. Scripts disabled");
                return;
            }

            int minThreads = m_ScriptConfig.GetInt("MinThreads", 2);
            int maxThreads = m_ScriptConfig.GetInt("MaxThreads", 2);
            int idleTimeout = m_ScriptConfig.GetInt("IdleTimeout", 60);
            string priority = m_ScriptConfig.GetString("Priority", "BelowNormal");
            int maxScriptQueue = m_ScriptConfig.GetInt("MaxScriptEventQueue",300);
            int stackSize = m_ScriptConfig.GetInt("ThreadStackSize", 262144);
            int sleepTime = m_ScriptConfig.GetInt("MaintenanceInterval", 10)*1000;
            m_EventLimit = m_ScriptConfig.GetInt("EventLimit", 30);
            m_KillTimedOutScripts = m_ScriptConfig.GetBoolean("KillTimedOutScripts", false);
            int saveTime = m_ScriptConfig.GetInt("SaveInterval", 300)*1000;

            ThreadPriority prio = ThreadPriority.BelowNormal;
            switch (priority)
            {
            case "Lowest":
                prio = ThreadPriority.Lowest;
                break;
            case "BelowNormal":
                prio = ThreadPriority.BelowNormal;
                break;
            case "Normal":
                prio = ThreadPriority.Normal;
                break;
            case "AboveNormal":
                prio = ThreadPriority.AboveNormal;
                break;
            case "Highest":
                prio = ThreadPriority.Highest;
                break;
            default:
                m_log.ErrorFormat("[XEngine] Invalid thread priority: '{0}'. Assuming BelowNormal", priority);
                break;
            }

            lock (m_ScriptEngines)
            {
                m_ScriptEngines.Add(this);
            }

            m_EventManager = new EventManager(this);

            StartEngine(minThreads, maxThreads, idleTimeout, prio,
                        maxScriptQueue, stackSize);

            m_Compiler = new Compiler(this);

            m_Scene.EventManager.OnRezScript += OnRezScript;
            m_Scene.EventManager.OnRemoveScript += OnRemoveScript;
            m_Scene.EventManager.OnScriptReset += OnScriptReset;
            m_Scene.EventManager.OnStartScript += OnStartScript;
            m_Scene.EventManager.OnStopScript += OnStopScript;

            m_AsyncCommands = new AsyncCommandManager(this);

            if (sleepTime > 0)
            {
                m_ThreadPool.QueueWorkItem(new WorkItemCallback(this.DoMaintenance), 
                                           new Object[]{ sleepTime });
            }

            if (saveTime > 0)
            {
                m_ThreadPool.QueueWorkItem(new WorkItemCallback(this.DoBackup), 
                                           new Object[] { saveTime });
            }

            scene.RegisterModuleInterface<IScriptModule>(this);
        }

        public void PostInitialise()
        {
            m_ThreadPool.Start();
        }

        public void Close()
        {
            lock (m_ScriptEngines)
            {
                if (m_ScriptEngines.Contains(this))
                    m_ScriptEngines.Remove(this);
            }
        }

        public object DoBackup(object o)
        {
            Object[] p = (Object[])o;
            int saveTime = (int)p[0];

            System.Threading.Thread.Sleep(saveTime);

//            m_log.Debug("[XEngine] Backing up script states");

            List<IScriptInstance> instances = new List<IScriptInstance>();

            lock (m_Scripts)
            {
                foreach (IScriptInstance instance in m_Scripts.Values)
                    instances.Add(instance);
            }

            foreach (IScriptInstance i in instances)
            {
                string assembly = String.Empty;

                lock (m_Scripts)
                {
                    if (!m_Assemblies.ContainsKey(i.AssetID))
                        continue;
                    assembly = m_Assemblies[i.AssetID];
                }

                i.SaveState(assembly);
            }

            instances.Clear();

            m_ThreadPool.QueueWorkItem(new WorkItemCallback(this.DoBackup), 
                                       new Object[] { saveTime });

            return 0;
        }

        public object DoMaintenance(object p)
        {
            object[] parms = (object[])p;
            int sleepTime = (int)parms[0];

            foreach (IScriptInstance inst in m_Scripts.Values)
            {
                if (inst.EventTime() > m_EventLimit)
                {
                    inst.Stop(100);
                    if (!m_KillTimedOutScripts)
                        inst.Start();
                }
            }

            System.Threading.Thread.Sleep(sleepTime);

            m_ThreadPool.QueueWorkItem(new WorkItemCallback(this.DoMaintenance), 
                                       new Object[]{ sleepTime });

            return 0;
        }

        public string Name
        {
            get { return "XEngine"; }
        }

        public bool IsSharedModule
        {
            get { return false; }
        }

        public void OnRezScript(uint localID, LLUUID itemID, string script, int startParam, bool postOnRez)
        {
            Object[] parms = new Object[]{localID, itemID, script, startParam, postOnRez};

            lock (m_CompileQueue)
            {
                m_CompileQueue.Enqueue(parms);

                if (m_CurrentCompile == null)
                {
                    if (m_firstStart)
                    {
                        m_firstStart = false;
                        m_CurrentCompile = m_ThreadPool.QueueWorkItem(
                            new WorkItemCallback(this.DoScriptWait), 
                            new Object[0]);
                        return;
                    }

                    m_CurrentCompile = m_ThreadPool.QueueWorkItem(
                            new WorkItemCallback(this.DoOnRezScriptQueue), 
                            new Object[0]);
                }
            }
        }

        public Object DoScriptWait(Object dummy)
        {
            Thread.Sleep(30000);

            lock (m_CompileQueue)
            {
                if (m_CompileQueue.Count > 0)
                {
                    m_CurrentCompile = m_ThreadPool.QueueWorkItem(
                            new WorkItemCallback(this.DoOnRezScriptQueue), 
                            new Object[0]);
                }
                else
                {
                    m_CurrentCompile = null;
                }
            }
            return null;
        }

        public Object DoOnRezScriptQueue(Object dummy)
        {
            Object o;
            lock (m_CompileQueue)
            {
                o = m_CompileQueue.Dequeue();
                if (o == null)
                {
                    m_CurrentCompile = null;
                    return null;
                }
            }

            DoOnRezScript(o);

            lock (m_CompileQueue)
            {
                if (m_CompileQueue.Count > 0)
                {
                    m_CurrentCompile = m_ThreadPool.QueueWorkItem(
                            new WorkItemCallback(this.DoOnRezScriptQueue), 
                            new Object[0]);
                }
                else
                {
                    m_CurrentCompile = null;
                }
            }
            return null;
        }

        private bool DoOnRezScript(object parm)
        {
            Object[] p = (Object[])parm;
            uint localID = (uint)p[0];
            LLUUID itemID = (LLUUID)p[1];
            string script =(string)p[2];
            int startParam = (int)p[3];
            bool postOnRez = (bool)p[4];

            // Get the asset ID of the script, so we can check if we
            // already have it.

            SceneObjectPart part = m_Scene.GetSceneObjectPart(localID);
            if (part == null)
                return false;

            TaskInventoryItem item = part.GetInventoryItem(itemID);
            if (item == null)
                return false;

            LLUUID assetID = item.AssetID;

//            m_log.DebugFormat("[XEngine] Compiling script {0} ({1})",
//                    item.Name, itemID.ToString());

            string assembly = "";
            try
            {
                assembly = m_Compiler.PerformScriptCompile(script,
                                                           assetID.ToString());
            }
            catch (Exception e)
            {
                try
                {
                    // DISPLAY ERROR INWORLD
                    string text = "Error compiling script:\r\n" + e.Message.ToString();
                    if (text.Length > 1000)
                        text = text.Substring(0, 1000);
                    World.SimChat(Helpers.StringToField(text),
                                  ChatTypeEnum.DebugChannel, 2147483647,
                                  part.AbsolutePosition,
                                  part.Name, part.UUID, false);
                }
                catch (Exception e2) // LEGIT: User Scripting
                {
                    m_log.Error("[XEngine]: "+
                            "Error displaying error in-world: " +
                            e2.ToString());
                    m_log.Error("[XEngine]: " +
                            "Errormessage: Error compiling script:\r\n" +
                            e.Message.ToString());
                }

                return false;
            }

            lock (m_Scripts)
            {
                // Create the object record

                if ((!m_Scripts.ContainsKey(itemID)) ||
                    (m_Scripts[itemID].AssetID != assetID))
                {
                    LLUUID appDomain = assetID;

                    if (part.ParentGroup.RootPart.IsAttachment)
                        appDomain = part.ParentGroup.RootPart.UUID;

                    if (!m_AppDomains.ContainsKey(appDomain))
                    {
                        try
                        {
                            AppDomainSetup appSetup = new AppDomainSetup();
//                            appSetup.ApplicationBase = Path.Combine(
//                                    "ScriptEngines",
//                                    m_Scene.RegionInfo.RegionID.ToString());

                            Evidence baseEvidence = AppDomain.CurrentDomain.Evidence;
                            Evidence evidence = new Evidence(baseEvidence);

                            m_AppDomains[appDomain] =
                                AppDomain.CreateDomain(
                                    m_Scene.RegionInfo.RegionID.ToString(),
                                    evidence, appSetup);

                            m_AppDomains[appDomain].AssemblyResolve +=
                                new ResolveEventHandler(
                                    AssemblyResolver.OnAssemblyResolve);
                            m_DomainScripts[appDomain] = new List<LLUUID>();
                        }
                        catch (Exception e)
                        {
                            m_log.ErrorFormat("[XEngine] Exception creating app domain:\n {0}", e.ToString());
                            return false;
                        }
                    }
                    m_DomainScripts[appDomain].Add(itemID);

                    ScriptInstance instance = 
                        new ScriptInstance(this,localID,
                                           part.UUID, itemID, assetID, assembly,
                                           m_AppDomains[appDomain],
                                           part.ParentGroup.RootPart.Name,
                                           item.Name, startParam, postOnRez,
                                           StateSource.NewRez, m_MaxScriptQueue);

                    m_log.DebugFormat("[XEngine] Loaded script {0}.{1}",
                            part.ParentGroup.RootPart.Name, item.Name);

                    instance.AppDomain = appDomain;

                    m_Scripts[itemID] = instance;
                }

                if (!m_PrimObjects.ContainsKey(localID))
                    m_PrimObjects[localID] = new List<LLUUID>();

                if (!m_PrimObjects[localID].Contains(itemID))
                    m_PrimObjects[localID].Add(itemID);

                if (!m_Assemblies.ContainsKey(assetID))
                    m_Assemblies[assetID] = assembly;
            }
            return true;
        }

        public void OnRemoveScript(uint localID, LLUUID itemID)
        {
            lock (m_Scripts)
            {
                // Do we even have it?
                if (!m_Scripts.ContainsKey(itemID))
                    return;

                m_AsyncCommands.RemoveScript(localID, itemID);

                IScriptInstance instance=m_Scripts[itemID];
                m_Scripts.Remove(itemID);

                instance.ClearQueue();
                instance.Stop(0);

                SceneObjectPart part =
                    m_Scene.GetSceneObjectPart(localID);

                if (part != null)
                    part.RemoveScriptEvents(itemID);

                // Remove the script from it's prim
                if (m_PrimObjects.ContainsKey(localID))
                {
                    // Remove inventory item record
                    if (m_PrimObjects[localID].Contains(itemID))
                        m_PrimObjects[localID].Remove(itemID);

                    // If there are no more scripts, remove prim
                    if (m_PrimObjects[localID].Count == 0)
                    {
                        m_PrimObjects.Remove(localID);
                    }
                }

                m_DomainScripts[instance.AppDomain].Remove(instance.ItemID);
                if (m_DomainScripts[instance.AppDomain].Count == 0)
                {
                    m_DomainScripts.Remove(instance.AppDomain);
                    UnloadAppDomain(instance.AppDomain);
                }

                instance.RemoveState();

                instance = null;

                CleanAssemblies();
            }
        }

        public void OnScriptReset(uint localID, LLUUID itemID)
        {
            ResetScript(itemID);
        }

        public void OnStartScript(uint localID, LLUUID itemID)
        {
            StartScript(itemID);
        }

        public void OnStopScript(uint localID, LLUUID itemID)
        {
            StopScript(itemID);
        }

        private void CleanAssemblies()
        {
            List<LLUUID> assetIDList = new List<LLUUID>(m_Assemblies.Keys);

            foreach (IScriptInstance i in m_Scripts.Values)
            {
                if (assetIDList.Contains(i.AssetID))
                    assetIDList.Remove(i.AssetID);
            }

            foreach (LLUUID assetID in assetIDList)
            {
//                m_log.DebugFormat("[XEngine] Removing unreferenced assembly {0}", m_Assemblies[assetID]);
                try
                {
                    if (File.Exists(m_Assemblies[assetID]))
                        File.Delete(m_Assemblies[assetID]);

                    if (File.Exists(m_Assemblies[assetID]+".state"))
                        File.Delete(m_Assemblies[assetID]+".state");

                    if (File.Exists(m_Assemblies[assetID]+".mdb"))
                        File.Delete(m_Assemblies[assetID]+".mdb");
                }
                catch (Exception)
                {
                }
                m_Assemblies.Remove(assetID);
            }
        }

        private void UnloadAppDomain(LLUUID id)
        {
            if (m_AppDomains.ContainsKey(id))
            {
                AppDomain domain = m_AppDomains[id];
                m_AppDomains.Remove(id);

                AppDomain.Unload(domain);
                domain = null;
//                m_log.DebugFormat("[XEngine] Unloaded app domain {0}", id.ToString());
            }
        }

        //
        // Start processing
        //
        private void StartEngine(int minThreads, int maxThreads,
                                 int idleTimeout, ThreadPriority threadPriority,
                                 int maxScriptQueue, int stackSize)
        {
            m_MaxScriptQueue = maxScriptQueue;

            STPStartInfo startInfo = new STPStartInfo();
            startInfo.IdleTimeout = idleTimeout;
            startInfo.MaxWorkerThreads = maxThreads;
            startInfo.MinWorkerThreads = minThreads;
            startInfo.ThreadPriority = threadPriority;
            startInfo.StackSize = stackSize;
            startInfo.StartSuspended = true;

            m_ThreadPool = new SmartThreadPool(startInfo);
        }

        //
        // Used by script instances to queue event handler jobs
        //
        public IScriptWorkItem QueueEventHandler(object parms)
        {
            return new XWorkItem(m_ThreadPool.QueueWorkItem(
                                     new WorkItemCallback(this.ProcessEventHandler), 
                                     parms));
        }

        //
        // The main script engine worker
        //
        private object ProcessEventHandler(object parms)
        {
            CultureInfo USCulture = new CultureInfo("en-US");
            Thread.CurrentThread.CurrentCulture = USCulture;

            IScriptInstance instance = (ScriptInstance) parms;

            return instance.EventProcessor();
        }

        //
        // Post event to an entire prim
        //
        public bool PostObjectEvent(uint localID, EventParams p)
        {
            bool result = false;

            if (!m_PrimObjects.ContainsKey(localID))
                return false;

            foreach (LLUUID itemID in m_PrimObjects[localID])
            {
                if (m_Scripts.ContainsKey(itemID))
                {
                    IScriptInstance instance = m_Scripts[itemID];
                    if (instance != null)
                    {
                        instance.PostEvent(p);
                        result = true;
                    }
                }
            }
            return result;
        }

        //
        // Post an event to a single script
        //
        public bool PostScriptEvent(LLUUID itemID, EventParams p)
        {
            if (m_Scripts.ContainsKey(itemID))
            {
                IScriptInstance instance = m_Scripts[itemID];
                if (instance != null)
                    instance.PostEvent(p);
                return true;
            }
            return false;
        }

        public Assembly OnAssemblyResolve(object sender,
                                          ResolveEventArgs args)
        {
            if (!(sender is System.AppDomain))
                return null;

            string[] pathList = new string[] {"bin", "ScriptEngines",
                                              Path.Combine("ScriptEngines",
                                                           m_Scene.RegionInfo.RegionID.ToString())};
            
            string assemblyName = args.Name;
            if (assemblyName.IndexOf(",") != -1)
                assemblyName = args.Name.Substring(0, args.Name.IndexOf(","));

            foreach (string s in pathList)
            {
                string path = Path.Combine(Directory.GetCurrentDirectory(),
                                           Path.Combine(s, assemblyName))+".dll";

                if (File.Exists(path))
                    return Assembly.LoadFrom(path);
            }

            return null;
        }

        private IScriptInstance GetInstance(LLUUID itemID)
        {
            IScriptInstance instance;
            lock (m_Scripts)
            {
                if (!m_Scripts.ContainsKey(itemID))
                    return null;
                instance = m_Scripts[itemID];
            }
            return instance;
        }

        public void SetScriptState(LLUUID itemID, bool running)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
            {
                if (running)
                    instance.Start();
                else
                    instance.Stop(100);
            }
        }

        public bool GetScriptState(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                return instance.Running;
            return false;
        }

        public void ApiResetScript(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                instance.ApiResetScript();
        }

        public void ResetScript(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                instance.ResetScript();
        }

        public void StartScript(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                instance.Start();
        }

        public void StopScript(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                instance.Stop(0);
        }

        public DetectParams GetDetectParams(LLUUID itemID, int idx)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                return instance.GetDetectParams(idx);
            return null;
        }

        public LLUUID GetDetectID(LLUUID itemID, int idx)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance != null)
                return instance.GetDetectID(idx);
            return LLUUID.Zero;
        }

        public void SetState(LLUUID itemID, string newState)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance == null)
                return;
            instance.SetState(newState);
        }
        public string GetState(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance == null)
                return "default";
            return instance.State;
        }

        public int GetStartParameter(LLUUID itemID)
        {
            IScriptInstance instance = GetInstance(itemID);
            if (instance == null)
                return 0;
            return instance.StartParam;
        }

        public bool GetScriptRunning(LLUUID objectID, LLUUID itemID)
        {
            return GetScriptState(itemID);
        }
    }
}