Lukas, this is the bug in Microsoft.Scripting.Silverlight. Because you
do "setup.HostType =
typeof(Microsoft.Scripting.Silverlight.BrowserScriptHost)", all
file-system lookups (like looking for a module) go through that type.
~Jimmy
On Wed, Aug 18, 2010 at 3:23 AM, Lukas Cenovsky <cenov...@bakalari.cz
<mailto:cenov...@bakalari.cz>> wrote:
Looks like there is a bug in DynamicEngine. When I tried the old
way, it works:
private void UserControl_Loaded(object sender, RoutedEventArgs ev)
{
IPloader = new BackgroundWorker();
IPloader.DoWork += new DoWorkEventHandler((s, e) =>
{
ScriptRuntimeSetup setup = new ScriptRuntimeSetup();
setup.LanguageSetups.Add(Python.CreateLanguageSetup(null));
setup.HostType =
typeof(Microsoft.Scripting.Silverlight.BrowserScriptHost);
setup.DebugMode = true;
runtime = new ScriptRuntime(setup);
engine = Python.GetEngine(runtime);
foreach (string str in new string[] { "mscorlib",
"System", "System.Windows", "System.Windows.Browser", "System.Net" })
{
runtime.LoadAssembly(runtime.Host.PlatformAdaptationLayer.LoadAssembly(str));
}
// engine.Execute("import imptest"); --this does not work
}
);
IPloader.RunWorkerCompleted += new
RunWorkerCompletedEventHandler((s, e) =>
{
this.textBlock1.Text = "IronPython loaded";
}
);
IPloader.RunWorkerAsync();
}
What does not work is importing modules in the background thread
(commented line). It throws the following exception:
System.InvalidOperationException was unhandled by user code
Message=This operation can only occur on the UI Thread.
StackTrace:
at
Microsoft.Scripting.Actions.Calls.MethodCandidate.Caller.Call(Object[]
args, Boolean& shouldOptimize)
at
IronPython.Runtime.Types.BuiltinFunction.BuiltinFunctionCaller`5.Call4(CallSite
site, CodeContext context, TFuncType func, T0 arg0, T1 arg1, T2
arg2, T3 arg3)
at
System.Dynamic.UpdateDelegates.UpdateAndExecute6[T0,T1,T2,T3,T4,T5,TRet](CallSite
site, T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
at IronPython.Runtime.Importer.Import(CodeContext context,
String fullName, PythonTuple from, Int32 level)
at
IronPython.Runtime.Operations.PythonOps.ImportTop(CodeContext
context, String fullName, Int32 level)
at
Microsoft.Scripting.Interpreter.FuncCallInstruction`4.Run(InterpretedFrame
frame)
at
Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame
frame)
at
Microsoft.Scripting.Interpreter.LightLambda.Run1[T0,TRet](T0 arg0)
at IronPython.Compiler.RuntimeScriptCode.InvokeTarget(Scope
scope)
at IronPython.Compiler.RuntimeScriptCode.Run()
at Microsoft.Scripting.SourceUnit.Execute()
at Microsoft.Scripting.Hosting.ScriptSource.Execute()
at Microsoft.Scripting.Hosting.ScriptEngine.Execute(String
expression)
at SLHosting.MainPage.<UserControl_Loaded>b__0(Object s,
DoWorkEventArgs e)
at
System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
at System.ComponentModel.BackgroundWorker.OnRun(Object
argument)
InnerException:
runtime.ImportModule("imptest"); is similar story so I guess it
cannot be done, right?
--
-- Lukáš
On 18.8.2010 5:05, Jimmy Schementi wrote:
True, but according to his exception stack it never gets there
... it throws on the "runtime =
DynamicEngine.CreateRuntime(true);" line. It throws because
somewhere in that method it doesn't dispatch to the UI thread as
you described. Those are the fixes I need to do.
~Jimmy
2010/8/17 Dave Curylo <cury...@asme.org <mailto:cury...@asme.org>>
Lukas,
I think the problem is the RunWorkerCompleted handler trying
to update the UI. Wrap calls from a background thread to
update UI controls in something like this so the Dispatcher
updates any controls on the UI thread:
this.Dispatcher.BeginInvoke(() =>
{
this.textBlock1.Text = "IronPython loaded";
});
Hope that helps.
-Dave
2010/8/17 Lukas Cenovsky <cenov...@bakalari.cz
<mailto:cenov...@bakalari.cz>>
Hi all,
is it possible to load IronPython engine in the
background thread in Silverlight?
I tried to load it via BackgroundWorker:
private void UserControl_Loaded(object sender,
RoutedEventArgs ev)
{
IPloader = new BackgroundWorker();
IPloader.DoWork += new DoWorkEventHandler((s, e) =>
{
runtime = DynamicEngine.CreateRuntime(true);
// debug mode true
engine = runtime.GetEngine("python");
}
);
IPloader.RunWorkerCompleted += new
RunWorkerCompletedEventHandler((s, e) =>
{
this.textBlock1.Text = "IronPython loaded";
}
);
IPloader.RunWorkerAsync();
}
It fails with the following exception:
System.UnauthorizedAccessException was unhandled by user code
Message=Invalid cross-thread access.
StackTrace:
at MS.Internal.XcpImports.CheckThread()
at
System.Windows.DependencyObject.GetValueInternal(DependencyProperty
dp)
at System.Windows.Deployment.get_Parts()
at
Microsoft.Scripting.Silverlight.DynamicAppManifest.AssemblyParts()
at
Microsoft.Scripting.Silverlight.DynamicAppManifest..ctor()
at
Microsoft.Scripting.Silverlight.DynamicEngine.CreateLangConfig()
at
Microsoft.Scripting.Silverlight.DynamicEngine.CreateRuntimeSetup(Boolean
debugMode)
at
Microsoft.Scripting.Silverlight.DynamicEngine.CreateRuntime(Boolean
debugMode)
at
SLHosting.MainPage.<UserControl_Loaded>b__0(Object s,
DoWorkEventArgs e)
at
System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs
e)
at
System.ComponentModel.BackgroundWorker.OnRun(Object argument)
InnerException:
Thanks for any advice.
--
-- Lukáš
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