/// <summary>Interrupts script execution.</summary>
/// <remarks>Interrupts script execution.</remarks>
private void Interrupted(Context cx, Dim.StackFrame frame, Exception scriptException)
{
Dim.ContextData contextData = frame.ContextData();
bool eventThreadFlag = callback.IsGuiEventThread();
contextData.eventThreadFlag = eventThreadFlag;
bool recursiveEventThreadCall = false;
lock (eventThreadMonitor)
{
if (eventThreadFlag)
{
if (interruptedContextData != null)
{
recursiveEventThreadCall = true;
goto interruptedCheck_break;
}
}
else
{
while (interruptedContextData != null)
{
try
{
System.Threading.Monitor.Wait(eventThreadMonitor);
}
catch (Exception)
{
return;
}
}
}
interruptedContextData = contextData;
}
interruptedCheck_break: ;
if (recursiveEventThreadCall)
{
// XXX: For now the following is commented out as on Linux
// too deep recursion of dispatchNextGuiEvent causes GUI lockout.
// Note: it can make GUI unresponsive if long-running script
// will be called on GUI thread while processing another interrupt
if (false)
{
// Run event dispatch until gui sets a flag to exit the initial
// call to interrupted.
while (this.returnValue == -1)
{
try
{
callback.DispatchNextGuiEvent();
}
catch (Exception)
{
}
}
}
return;
}
if (interruptedContextData == null)
{
Kit.CodeBug();
}
try
{
do
{
int frameCount = contextData.FrameCount();
this.frameIndex = frameCount - 1;
string threadTitle = Sharpen.Thread.CurrentThread().ToString();
string alertMessage;
if (scriptException == null)
{
alertMessage = null;
}
else
{
alertMessage = scriptException.ToString();
}
int returnValue = -1;
if (!eventThreadFlag)
{
lock (monitor)
{
if (insideInterruptLoop)
{
Kit.CodeBug();
}
this.insideInterruptLoop = true;
this.evalRequest = null;
this.returnValue = -1;
callback.EnterInterrupt(frame, threadTitle, alertMessage);
try
{
for (; ; )
{
try
{
System.Threading.Monitor.Wait(monitor);
}
catch (Exception)
{
Sharpen.Thread.CurrentThread().Interrupt();
break;
}
if (evalRequest != null)
{
this.evalResult = null;
try
{
evalResult = Do_eval(cx, evalFrame, evalRequest);
}
finally
{
evalRequest = null;
evalFrame = null;
System.Threading.Monitor.Pulse(monitor);
}
continue;
}
if (this.returnValue != -1)
{
returnValue = this.returnValue;
break;
}
}
}
finally
{
insideInterruptLoop = false;
}
}
}
else
{
this.returnValue = -1;
callback.EnterInterrupt(frame, threadTitle, alertMessage);
while (this.returnValue == -1)
{
try
{
callback.DispatchNextGuiEvent();
}
catch (Exception)
{
}
}
returnValue = this.returnValue;
}
switch (returnValue)
{
case STEP_OVER:
{
contextData.breakNextLine = true;
contextData.stopAtFrameDepth = contextData.FrameCount();
break;
}
case STEP_INTO:
{
contextData.breakNextLine = true;
contextData.stopAtFrameDepth = -1;
break;
}
case STEP_OUT:
{
if (contextData.FrameCount() > 1)
{
contextData.breakNextLine = true;
contextData.stopAtFrameDepth = contextData.FrameCount() - 1;
}
break;
}
}
}
while (false);
}
finally
{
lock (eventThreadMonitor)
{
interruptedContextData = null;
System.Threading.Monitor.PulseAll(eventThreadMonitor);
}
}
}
/// <summary>Evaluates the given script.</summary>
/// <remarks>Evaluates the given script.</remarks>
public virtual string Eval(string expr)
{
string result = "undefined";
if (expr == null)
{
return result;
}
Dim.ContextData contextData = CurrentContextData();
if (contextData == null || frameIndex >= contextData.FrameCount())
{
return result;
}
Dim.StackFrame frame = contextData.GetFrame(frameIndex);
if (contextData.eventThreadFlag)
{
Context cx = Context.GetCurrentContext();
result = Do_eval(cx, frame, expr);
}
else
{
lock (monitor)
{
if (insideInterruptLoop)
{
evalRequest = expr;
evalFrame = frame;
System.Threading.Monitor.Pulse(monitor);
do
{
try
{
System.Threading.Monitor.Wait(monitor);
}
catch (Exception)
{
Sharpen.Thread.CurrentThread().Interrupt();
break;
}
}
while (evalRequest != null);
result = evalResult;
}
}
}
return result;
}
