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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using IronPython.Runtime;
#if FEATURE_PROCESS
namespace IronPython.Modules {
public static partial class PythonSignal {
internal class SimpleSignalState : PythonSignalState {
public SimpleSignalState(PythonContext pc)
: base(pc) {
Console.CancelKeyPress += new ConsoleCancelEventHandler(Console_CancelKeyPress);
}
void Console_CancelKeyPress(object sender, ConsoleCancelEventArgs e) {
int pySignal;
switch(e.SpecialKey) {
case ConsoleSpecialKey.ControlC:
pySignal = SIGINT;
break;
case ConsoleSpecialKey.ControlBreak:
pySignal = SIGBREAK;
break;
default:
throw new InvalidOperationException("unreachable");
}
lock (PySignalToPyHandler) {
if (PySignalToPyHandler[pySignal].GetType() == typeof(int)) {
int tempId = (int)PySignalToPyHandler[pySignal];
if (tempId == SIG_DFL) {
//SIG_DFL - do whatever it normally would
return;
} else if (tempId == SIG_IGN) {
//SIG_IGN - we do nothing, but tell the OS we handled the signal
e.Cancel = false;
return;
} else {
throw new Exception("unreachable");
}
} else if (PySignalToPyHandler[pySignal] == default_int_handler) {
if (pySignal != SIGINT) {
//We're dealing with the default_int_handlerImpl which we
//know doesn't care about the frame parameter
e.Cancel = true;
default_int_handlerImpl(pySignal, null);
return;
} else {
//Let the real interrupt handler throw a KeyboardInterrupt for SIGINT.
//It handles this far more gracefully than we can
return;
}
} else {
//We're dealing with a callable matching PySignalHandler's signature
PySignalHandler temp = (PySignalHandler)Converter.ConvertToDelegate(PySignalToPyHandler[pySignal],
typeof(PySignalHandler));
try {
if (SignalPythonContext.PythonOptions.Frames) {
temp.Invoke(pySignal, SysModule._getframeImpl(null,
0,
SignalPythonContext._mainThreadFunctionStack));
} else {
temp.Invoke(pySignal, null);
}
} catch (Exception ex) {
System.Console.WriteLine(SignalPythonContext.FormatException(ex));
}
e.Cancel = true;
return;
}
}
}
}
}
}
#endif