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/*
* 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.Collections;
using System.Reflection;
using System.Threading;
using System.Globalization;
using libsecondlife;
using log4net;
using OpenSim.Framework;
using OpenSim.Region.Environment.Scenes.Scripting;
namespace OpenSim.Region.ScriptEngine.Common.ScriptEngineBase
{
/// <summary>
/// Because every thread needs some data set for it (time started to execute current function), it will do its work within a class
/// </summary>
public class EventQueueThreadClass : iScriptEngineFunctionModule
{
private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
/// <summary>
/// How many ms to sleep if queue is empty
/// </summary>
private static int nothingToDoSleepms;// = 50;
private static ThreadPriority MyThreadPriority;
public long LastExecutionStarted;
public bool InExecution = false;
public bool KillCurrentScript = false;
//private EventQueueManager eventQueueManager;
public Thread EventQueueThread;
private static int ThreadCount = 0;
private string ScriptEngineName = "ScriptEngine.Common";
public EventQueueThreadClass()//EventQueueManager eqm
{
//eventQueueManager = eqm;
ReadConfig();
Start();
}
~EventQueueThreadClass()
{
Stop();
}
public void ReadConfig()
{
lock (ScriptEngine.ScriptEngines)
{
foreach (ScriptEngine m_ScriptEngine in ScriptEngine.ScriptEngines)
{
ScriptEngineName = m_ScriptEngine.ScriptEngineName;
nothingToDoSleepms = m_ScriptEngine.ScriptConfigSource.GetInt("SleepTimeIfNoScriptExecutionMs", 50);
// Later with ScriptServer we might want to ask OS for stuff too, so doing this a bit manually
string pri = m_ScriptEngine.ScriptConfigSource.GetString("ScriptThreadPriority", "BelowNormal");
switch (pri.ToLower())
{
case "lowest":
MyThreadPriority = ThreadPriority.Lowest;
break;
case "belownormal":
MyThreadPriority = ThreadPriority.BelowNormal;
break;
case "normal":
MyThreadPriority = ThreadPriority.Normal;
break;
case "abovenormal":
MyThreadPriority = ThreadPriority.AboveNormal;
break;
case "highest":
MyThreadPriority = ThreadPriority.Highest;
break;
default:
MyThreadPriority = ThreadPriority.BelowNormal; // Default
m_ScriptEngine.Log.Error("[ScriptEngineBase]: Unknown priority type \"" + pri +
"\" in config file. Defaulting to \"BelowNormal\".");
break;
}
}
}
// Now set that priority
if (EventQueueThread != null)
if (EventQueueThread.IsAlive)
EventQueueThread.Priority = MyThreadPriority;
}
/// <summary>
/// Start thread
/// </summary>
private void Start()
{
EventQueueThread = new Thread(EventQueueThreadLoop);
EventQueueThread.IsBackground = true;
EventQueueThread.Priority = MyThreadPriority;
EventQueueThread.Name = "EventQueueManagerThread_" + ThreadCount;
EventQueueThread.Start();
ThreadTracker.Add(EventQueueThread);
// Look at this... Don't you wish everyone did that solid coding everywhere? :P
if (ThreadCount == int.MaxValue)
ThreadCount = 0;
ThreadCount++;
}
public void Stop()
{
//PleaseShutdown = true; // Set shutdown flag
//Thread.Sleep(100); // Wait a bit
if (EventQueueThread != null && EventQueueThread.IsAlive == true)
{
try
{
EventQueueThread.Abort(); // Send abort
//EventQueueThread.Join(); // Wait for it
}
catch (Exception)
{
//myScriptEngine.Log.Info("[" + ScriptEngineName + "]: EventQueueManager Exception killing worker thread: " + e.ToString());
}
}
}
private EventQueueManager.QueueItemStruct BlankQIS = new EventQueueManager.QueueItemStruct();
private ScriptEngine lastScriptEngine;
/// <summary>
/// Queue processing thread loop
/// </summary>
private void EventQueueThreadLoop()
{
CultureInfo USCulture = new CultureInfo("en-US");
Thread.CurrentThread.CurrentCulture = USCulture;
//myScriptEngine.Log.Info("[" + ScriptEngineName + "]: EventQueueManager Worker thread spawned");
try
{
while (true)
{
try
{
while (true)
{
DoProcessQueue();
}
}
catch (ThreadAbortException)
{
if (lastScriptEngine != null)
lastScriptEngine.Log.Info("[" + ScriptEngineName + "]: ThreadAbortException while executing function.");
}
catch (Exception e)
{
if (lastScriptEngine != null)
lastScriptEngine.Log.Error("[" + ScriptEngineName + "]: Exception in EventQueueThreadLoop: " + e.ToString());
}
}
}
catch (ThreadAbortException)
{
//myScriptEngine.Log.Info("[" + ScriptEngineName + "]: EventQueueManager Worker thread killed: " + tae.Message);
}
}
public void DoProcessQueue()
{
//lock (ScriptEngine.ScriptEngines)
//{
foreach (ScriptEngine m_ScriptEngine in new ArrayList(ScriptEngine.ScriptEngines))
{
lastScriptEngine = m_ScriptEngine;
// Every now and then check if we should shut down
//if (PleaseShutdown || EventQueueManager.ThreadsToExit > 0)
//{
// // Someone should shut down, lets get exclusive lock
// lock (EventQueueManager.ThreadsToExitLock)
// {
// // Lets re-check in case someone grabbed it
// if (EventQueueManager.ThreadsToExit > 0)
// {
// // Its crowded here so we'll shut down
// EventQueueManager.ThreadsToExit--;
// Stop();
// return;
// }
// else
// {
// // We have been asked to shut down
// Stop();
// return;
// }
// }
//}
//try
// {
EventQueueManager.QueueItemStruct QIS = BlankQIS;
bool GotItem = false;
//if (PleaseShutdown)
// return;
if (m_ScriptEngine.m_EventQueueManager == null || m_ScriptEngine.m_EventQueueManager.eventQueue == null)
continue;
if (m_ScriptEngine.m_EventQueueManager.eventQueue.Count == 0)
{
// Nothing to do? Sleep a bit waiting for something to do
Thread.Sleep(nothingToDoSleepms);
}
else
{
// Something in queue, process
//myScriptEngine.Log.Info("[" + ScriptEngineName + "]: Processing event for localID: " + QIS.localID + ", itemID: " + QIS.itemID + ", FunctionName: " + QIS.FunctionName);
// OBJECT BASED LOCK - TWO THREADS WORKING ON SAME OBJECT IS NOT GOOD
lock (m_ScriptEngine.m_EventQueueManager.eventQueue)
{
GotItem = false;
for (int qc = 0; qc < m_ScriptEngine.m_EventQueueManager.eventQueue.Count; qc++)
{
// Get queue item
QIS = m_ScriptEngine.m_EventQueueManager.eventQueue.Dequeue();
// Check if object is being processed by someone else
if (m_ScriptEngine.m_EventQueueManager.TryLock(QIS.localID) == false)
{
// Object is already being processed, requeue it
m_ScriptEngine.m_EventQueueManager.eventQueue.Enqueue(QIS);
}
else
{
// We have lock on an object and can process it
GotItem = true;
break;
}
}
}
if (GotItem == true)
{
// Execute function
try
{
///cfk 2-7-08 dont need this right now and the default Linux build has DEBUG defined
#if DEBUG
//eventQueueManager.m_ScriptEngine.Log.Debug("[" + ScriptEngineName + "]: " +
// "Executing event:\r\n"
// + "QIS.localID: " + QIS.localID
// + ", QIS.itemID: " + QIS.itemID
// + ", QIS.functionName: " +
// QIS.functionName);
#endif
// Only pipe event if land supports it.
if (m_ScriptEngine.World.pipeEventsForScript(QIS.localID))
{
LastExecutionStarted = DateTime.Now.Ticks;
KillCurrentScript = false;
InExecution = true;
m_ScriptEngine.m_ScriptManager.ExecuteEvent(QIS.localID,
QIS.itemID,
QIS.functionName,
QIS.llDetectParams,
QIS.param);
InExecution = false;
}
}
catch (Exception e)
{
InExecution = false;
// DISPLAY ERROR INWORLD
string text = "Error executing script function \"" + QIS.functionName +
"\":\r\n";
if (e.InnerException != null)
{
// Send inner exception
string[] lines=e.InnerException.ToString().Replace("\r", "").Split('\n');
string line = " (unknown line)";
foreach (string t in lines)
{
int idx=t.IndexOf("SecondLife.Script.");
if (idx != -1)
{
// Need to skip past windows paths that have "c:\" in them
int colon=t.LastIndexOf(":");
if (-1 != colon)
{
// Not sure why this is converted to an int then back to a string, either
// way, need to skip the word "line " in the substring
try
{
// ...if it is there. With mono --debug OpenSim.exe,
// you'll get the error in the format filename:linenumber
if (colon + 6 < t.Length && t.Substring(colon + 1, 5).Equals("line ")) colon += 6;
else ++colon; // else only skip the colon
line = " at line " + Convert.ToInt32(t.Substring(colon)).ToString();
}
catch (ArgumentOutOfRangeException e2)
{
// FIXME: Big fat temporary patch to stop the Substring above throwing an exception
// and stopping a proper kill of the script. We're making an unwarranted assumption
// about the size of t. This needs to be fixed properly.
m_log.ErrorFormat("[SCRIPT ENGINE]: Error line number conversion exception {0}", e2);
line = " at line (unavailable)";
}
break;
}
}
}
text += e.InnerException.Message.ToString() + line;
}
else
{
text += "\r\n";
// Send normal
text += e.Message.ToString();
}
if (KillCurrentScript)
text += "\r\nScript will be deactivated!";
try
{
if (text.Length > 1500)
text = text.Substring(0, 1500);
IScriptHost m_host =
m_ScriptEngine.World.GetSceneObjectPart(QIS.localID);
//if (m_host != null)
//{
m_ScriptEngine.World.SimChat(Helpers.StringToField(text),
ChatTypeEnum.DebugChannel, 2147483647,
m_host.AbsolutePosition,
m_host.Name, m_host.UUID, false);
}
catch (Exception)
{
//}
//else
//{
// T oconsole
m_ScriptEngine.m_EventQueueManager.m_ScriptEngine.Log.Error("[" + ScriptEngineName +
"]: " +
"Unable to send text in-world:\r\n" +
text);
}
finally
{
// So we are done sending message in-world
if (KillCurrentScript)
{
m_ScriptEngine.m_EventQueueManager.m_ScriptEngine.m_ScriptManager.StopScript(
QIS.localID, QIS.itemID);
}
}
// Pass it on so it's displayed on the console
// and in the logs (mikem 2008.06.02).
throw e.InnerException;
}
finally
{
InExecution = false;
m_ScriptEngine.m_EventQueueManager.ReleaseLock(QIS.localID);
}
}
}
}
// }
}
///// <summary>
///// If set to true then threads and stuff should try to make a graceful exit
///// </summary>
//public bool PleaseShutdown
//{
// get { return _PleaseShutdown; }
// set { _PleaseShutdown = value; }
//}
//private bool _PleaseShutdown = false;
}
}
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