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

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This makes use of EventWaitHandles since various web references indicate that Thread.Interrupt() can also cause runtime instability.
If co-op termination is enabled, then termination sets the wait handle instead of waiting for a timeout before possibly aborting the thread.
This allows the script to cleanly terminate if it's in a llSleep/LL function delay or the next time it enters such a wait without any timeout period.
Co-op termination is not yet testable since checking for termination request within loops that never trigger a wait is not yet implemented.
This commit is contained in:
Justin Clark-Casey (justincc)
2013-01-16 00:12:40 +00:00
parent fccb03227e
commit 1b5c41c14a
8 changed files with 293 additions and 14 deletions
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31
OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
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@@ -83,6 +83,12 @@ 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;
@@ -112,11 +118,12 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
public void Initialize(IScriptInstance scriptInstance)
{
m_ScriptEngine = scriptInstance.Engine;
m_host = scriptInstance.Part;
m_item = scriptInstance.ScriptTask;
m_scriptInstance = scriptInstance;
m_ScriptEngine = m_scriptInstance.Engine;
m_host = m_scriptInstance.Part;
m_item = m_scriptInstance.ScriptTask;
LoadLimits(); // read script limits from config.
LoadConfig();
m_TransferModule =
m_ScriptEngine.World.RequestModuleInterface<IMessageTransferModule>();
@@ -129,7 +136,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
/// <summary>
/// Load configuration items that affect script, object and run-time behavior. */
/// </summary>
private void LoadLimits()
private void LoadConfig()
{
m_ScriptDelayFactor =
m_ScriptEngine.Config.GetFloat("ScriptDelayFactor", 1.0f);
@@ -175,7 +182,16 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
delay = (int)((float)delay * m_ScriptDelayFactor);
if (delay == 0)
return;
System.Threading.Thread.Sleep(delay);
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();
}
public Scene World
@@ -2914,7 +2930,8 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
{
// m_log.Info("llSleep snoozing " + sec + "s.");
m_host.AddScriptLPS(1);
Thread.Sleep((int)(sec * 1000));
Sleep((int)(sec * 1000));
}
public LSL_Float llGetMass()