|
static private Decref ( |
||
| op | ||
| return | void | |
//====================================================================
// EventBinding dealloc implementation.
//====================================================================
public static new void tp_dealloc(IntPtr ob)
{
EventBinding self = (EventBinding)GetManagedObject(ob);
Runtime.Decref(self.target);
ExtensionType.FinalizeObject(self);
}
public static void tp_dealloc(IntPtr tp)
{
// Fix this when we dont cheat on the handle for subclasses!
int flags = (int)Marshal.ReadIntPtr(tp, TypeOffset.tp_flags);
if ((flags & TypeFlags.Subclass) == 0)
{
IntPtr gc = Marshal.ReadIntPtr(tp, TypeOffset.magic());
((GCHandle)gc).Free();
}
IntPtr op = Marshal.ReadIntPtr(tp, TypeOffset.ob_type);
Runtime.Decref(op);
// Delegate the rest of finalization the Python metatype. Note
// that the PyType_Type implementation of tp_dealloc will call
// tp_free on the type of the type being deallocated - in this
// case our CLR metatype. That is why we implement tp_free.
op = Marshal.ReadIntPtr(Runtime.PyTypeType, TypeOffset.tp_dealloc);
NativeCall.Void_Call_1(op, tp);
return;
}
//====================================================================
// OverloadMapper dealloc implementation.
//====================================================================
public static new void tp_dealloc(IntPtr ob)
{
OverloadMapper self = (OverloadMapper)GetManagedObject(ob);
Runtime.Decref(self.target);
ExtensionType.FinalizeObject(self);
}
public static IntPtr tp_call(IntPtr ob, IntPtr args, IntPtr kw)
{
MethodBinding self = (MethodBinding)GetManagedObject(ob);
// This supports calling a method 'unbound', passing the instance
// as the first argument. Note that this is not supported if any
// of the overloads are static since we can't know if the intent
// was to call the static method or the unbound instance method.
if ((self.target == IntPtr.Zero) && (!self.m.IsStatic()))
{
if (Runtime.PyTuple_Size(args) < 1)
{
Exceptions.SetError(Exceptions.TypeError,
"not enough arguments"
);
return(IntPtr.Zero);
}
int len = Runtime.PyTuple_Size(args);
IntPtr uargs = Runtime.PyTuple_GetSlice(args, 1, len);
IntPtr inst = Runtime.PyTuple_GetItem(args, 0);
Runtime.Incref(inst);
IntPtr r = self.m.Invoke(inst, uargs, kw, self.info);
Runtime.Decref(inst);
Runtime.Decref(uargs);
return(r);
}
return(self.m.Invoke(self.target, args, kw, self.info));
}
//====================================================================
// Implements __setitem__ for reflected classes and value types.
//====================================================================
public static int mp_ass_subscript(IntPtr ob, IntPtr idx, IntPtr v)
{
//ManagedType self = GetManagedObject(ob);
IntPtr tp = Runtime.PyObject_TYPE(ob);
ClassBase cls = (ClassBase)GetManagedObject(tp);
if (cls.indexer == null || !cls.indexer.CanSet)
{
Exceptions.SetError(Exceptions.TypeError,
"object doesn't support item assignment"
);
return(-1);
}
// Arg may be a tuple in the case of an indexer with multiple
// parameters. If so, use it directly, else make a new tuple
// with the index arg (method binders expect arg tuples).
IntPtr args = idx;
bool free = false;
if (!Runtime.PyTuple_Check(idx))
{
args = Runtime.PyTuple_New(1);
Runtime.Incref(idx);
Runtime.PyTuple_SetItem(args, 0, idx);
free = true;
}
int i = Runtime.PyTuple_Size(args);
IntPtr real = Runtime.PyTuple_New(i + 1);
for (int n = 0; n < i; n++)
{
IntPtr item = Runtime.PyTuple_GetItem(args, n);
Runtime.Incref(item);
Runtime.PyTuple_SetItem(real, n, item);
}
Runtime.Incref(v);
Runtime.PyTuple_SetItem(real, i, v);
try {
cls.indexer.SetItem(ob, real);
}
finally {
Runtime.Decref(real);
if (free)
{
Runtime.Decref(args);
}
}
if (Exceptions.ErrorOccurred())
{
return(-1);
}
return(0);
}
public static KeywordArguments kw(params object[] kv)
{
var dict = new KeywordArguments();
if (kv.Length % 2 != 0)
{
throw new ArgumentException("Must have an equal number of keys and values");
}
for (int i = 0; i < kv.Length; i += 2)
{
IntPtr value;
if (kv[i + 1] is PyObject)
{
value = ((PyObject)kv[i + 1]).Handle;
}
else
{
value = Converter.ToPython(kv[i + 1], kv[i + 1].GetType());
}
if (Runtime.PyDict_SetItemString(dict.Handle, (string)kv[i], value) != 0)
{
throw new ArgumentException(string.Format("Cannot add key '{0}' to dictionary.", (string)kv[i]));
}
if (!(kv[i + 1] is PyObject))
{
Runtime.Decref(value);
}
}
return(dict);
}
//====================================================================
// helper methods for raising warnings
//====================================================================
/// <summary>
/// Alias for Python's warnings.warn() function.
/// </summary>
public static void warn(string message, IntPtr exception, int stacklevel)
{
if ((exception == IntPtr.Zero) ||
(Runtime.PyObject_IsSubclass(exception, Exceptions.Warning) != 1))
{
Exceptions.RaiseTypeError("Invalid exception");
}
Runtime.Incref(warnings_module);
IntPtr warn = Runtime.PyObject_GetAttrString(warnings_module, "warn");
Runtime.Decref(warnings_module);
Exceptions.ErrorCheck(warn);
IntPtr args = Runtime.PyTuple_New(3);
IntPtr msg = Runtime.PyString_FromString(message);
Runtime.Incref(exception); // PyTuple_SetItem steals a reference
IntPtr level = Runtime.PyInt_FromInt32(stacklevel);
Runtime.PyTuple_SetItem(args, 0, msg);
Runtime.PyTuple_SetItem(args, 1, exception);
Runtime.PyTuple_SetItem(args, 2, level);
IntPtr result = Runtime.PyObject_CallObject(warn, args);
Exceptions.ErrorCheck(result);
Runtime.Decref(warn);
Runtime.Decref(result);
Runtime.Decref(args);
}
public ModuleObject(string name) : base()
{
moduleName = (name == String.Empty) ? "CLR" : name;
cache = new Hashtable();
_namespace = name;
dict = Runtime.PyDict_New();
IntPtr pyname = Runtime.PyString_FromString(moduleName);
Runtime.PyDict_SetItemString(dict, "__name__", pyname);
Runtime.PyDict_SetItemString(dict, "__file__", Runtime.PyNone);
Runtime.PyDict_SetItemString(dict, "__doc__", Runtime.PyNone);
Runtime.Decref(pyname);
Marshal.WriteIntPtr(this.pyHandle, ObjectOffset.ob_dict, dict);
// This hackery is required in order to allow a plain Python to
// import the managed runtime via the CLR bootstrapper module.
// The standard Python machinery in control at the time of the
// import requires the module to pass PyModule_Check. :(
if (!hacked)
{
IntPtr type = this.tpHandle;
IntPtr mro = Marshal.ReadIntPtr(type, TypeOffset.tp_mro);
IntPtr ext = Runtime.ExtendTuple(mro, Runtime.PyModuleType);
Marshal.WriteIntPtr(type, TypeOffset.tp_mro, ext);
Runtime.Decref(mro);
hacked = true;
}
}
internal static IntPtr GetExceptionInstanceWrapper(IntPtr real)
{
// Given the pointer to a new-style class instance representing a
// managed exception, return an appropriate old-style class
// wrapper instance that delegates to the wrapped instance.
IntPtr tp = Runtime.PyObject_TYPE(real);
if (Runtime.PyObject_TYPE(tp) == Runtime.PyInstanceType)
{
return(real);
}
// Get / generate a class wrapper, instantiate it and set its
// _inner attribute to the real new-style exception instance.
IntPtr ct = GetExceptionClassWrapper(tp);
Exceptions.ErrorCheck(ct);
IntPtr op = Runtime.PyInstance_NewRaw(ct, IntPtr.Zero);
Exceptions.ErrorCheck(op);
IntPtr d = Runtime.PyObject_GetAttrString(op, "__dict__");
Exceptions.ErrorCheck(d);
Runtime.PyDict_SetItemString(d, "_inner", real);
Runtime.Decref(d);
return(op);
}
/// <summary>
/// SetError Method
/// </summary>
///
/// <remarks>
/// Sets the current Python exception given a CLR exception
/// object. The CLR exception instance is wrapped as a Python
/// object, allowing it to be handled naturally from Python.
/// </remarks>
public static void SetError(Exception e)
{
// Because delegates allow arbitrary nestings of Python calling
// managed calling Python calling... etc. it is possible that we
// might get a managed exception raised that is a wrapper for a
// Python exception. In that case we'd rather have the real thing.
PythonException pe = e as PythonException;
if (pe != null)
{
Runtime.PyErr_SetObject(pe.PyType, pe.PyValue);
return;
}
IntPtr op = CLRObject.GetInstHandle(e);
// XXX - hack to raise a compatible old-style exception ;(
if (Runtime.wrap_exceptions)
{
op = GetExceptionInstanceWrapper(op);
}
IntPtr etype = Runtime.PyObject_GetAttrString(op, "__class__");
Runtime.PyErr_SetObject(etype, op);
Runtime.Decref(etype);
}
internal static void SetupExceptionHack()
{
ns_exc = ClassManager.GetClass(typeof(Exception)).pyHandle;
cache = new Hashtable();
string code =
"import exceptions\n" +
"class Exception(exceptions.Exception):\n" +
" _class = None\n" +
" _inner = None\n" +
"\n" +
" def __init__(self, *args, **kw):\n" +
" inst = self.__class__._class(*args, **kw)\n" +
" self.__dict__['_inner'] = inst\n" +
" exceptions.Exception.__init__(self, *args, **kw)\n" +
"\n" +
" def __getattr__(self, name, _marker=[]):\n" +
" inner = self.__dict__['_inner']\n" +
" v = getattr(inner, name, _marker)\n" +
" if v is not _marker:\n" +
" return v\n" +
" v = self.__dict__.get(name, _marker)\n" +
" if v is not _marker:\n" +
" return v\n" +
" raise AttributeError(name)\n" +
"\n" +
" def __setattr__(self, name, value):\n" +
" inner = self.__dict__['_inner']\n" +
" setattr(inner, name, value)\n" +
"\n" +
" def __str__(self):\n" +
" inner = self.__dict__.get('_inner')\n" +
" msg = getattr(inner, 'Message', '')\n" +
" st = getattr(inner, 'StackTrace', '')\n" +
" st = st and '\\n' + st or ''\n" +
" return msg + st\n" +
"\n";
IntPtr dict = Runtime.PyDict_New();
IntPtr builtins = Runtime.PyEval_GetBuiltins();
Runtime.PyDict_SetItemString(dict, "__builtins__", builtins);
IntPtr namestr = Runtime.PyString_FromString("System");
Runtime.PyDict_SetItemString(dict, "__name__", namestr);
Runtime.Decref(namestr);
Runtime.PyDict_SetItemString(dict, "__file__", Runtime.PyNone);
Runtime.PyDict_SetItemString(dict, "__doc__", Runtime.PyNone);
IntPtr flag = Runtime.Py_file_input;
IntPtr done = Runtime.PyRun_String(code, flag, dict, dict);
os_exc = Runtime.PyDict_GetItemString(dict, "Exception");
Runtime.PyObject_SetAttrString(os_exc, "_class", ns_exc);
Runtime.PyErr_Clear();
}
/// <summary>
/// Repr Method
/// </summary>
///
/// <remarks>
/// Return a string representation of the object. This method is
/// the managed equivalent of the Python expression "repr(object)".
/// </remarks>
public string Repr()
{
IntPtr strval = Runtime.PyObject_Repr(obj);
string result = Runtime.GetManagedString(strval);
Runtime.Decref(strval);
return(result);
}
//====================================================================
// ConstructorBinding dealloc implementation.
//====================================================================
public static new void tp_dealloc(IntPtr ob)
{
BoundContructor self = (BoundContructor)GetManagedObject(ob);
Runtime.Decref(self.repr);
Runtime.Decref(self.pyTypeHndl);
ExtensionType.FinalizeObject(self);
}
//====================================================================
// ConstructorBinding dealloc implementation.
//====================================================================
public static new void tp_dealloc(IntPtr ob)
{
ConstructorBinding self = (ConstructorBinding)GetManagedObject(ob);
Runtime.Decref(self.repr);
Runtime.Decref(self.pyTypeHndl);
ExtensionType.FinalizeObject(self);
}
/// <summary>
/// ToString Method
/// </summary>
///
/// <remarks>
/// Return the string representation of the object. This method is
/// the managed equivalent of the Python expression "str(object)".
/// </remarks>
public override string ToString()
{
IntPtr strval = Runtime.PyObject_Unicode(obj);
string result = Runtime.GetManagedString(strval);
Runtime.Decref(strval);
return(result);
}
//====================================================================
// Descriptor dealloc implementation.
//====================================================================
public static new void tp_dealloc(IntPtr ob)
{
EventObject self = (EventObject)GetManagedObject(ob);
if (self.unbound != null)
{
Runtime.Decref(self.unbound.pyHandle);
}
ExtensionType.FinalizeObject(self);
}
public static void tp_dealloc(IntPtr ob)
{
ManagedType self = GetManagedObject(ob);
IntPtr dict = Marshal.ReadIntPtr(ob, ObjectOffset.ob_dict);
Runtime.Decref(dict);
Runtime.PyObject_GC_UnTrack(self.pyHandle);
Runtime.PyObject_GC_Del(self.pyHandle);
Runtime.Decref(self.tpHandle);
self.gcHandle.Free();
}
//===================================================================
// Cleanup resources upon shutdown of the Python runtime.
//===================================================================
internal static void Shutdown()
{
Type type = typeof(Exceptions);
foreach (FieldInfo fi in type.GetFields(BindingFlags.Public |
BindingFlags.Static))
{
IntPtr op = (IntPtr)fi.GetValue(type);
Runtime.Decref(op);
}
}
//===================================================================
// Cleanup resources upon shutdown of the Python runtime.
//===================================================================
internal static void Shutdown()
{
#if (PYTHON32 || PYTHON33 || PYTHON34)
Runtime.Decref(py_clr_module);
Runtime.Decref(root.pyHandle);
ModuleDefOffset.FreeModuleDef(module_def);
#else
Runtime.Decref(root.pyHandle);
Runtime.Decref(root.pyHandle);
#endif
Runtime.Decref(py_import);
}
static void SetConversionError(IntPtr value, Type target)
{
IntPtr ob = Runtime.PyObject_Repr(value);
string src = Runtime.GetManagedString(ob);
Runtime.Decref(ob);
string error = String.Format(
"Cannot convert {0} to {1}", src, target
);
Exceptions.SetError(Exceptions.TypeError, error);
}
public static PyObject RunString(string code, IntPtr globals, IntPtr locals)
{
IntPtr flag = (IntPtr)257; /* Py_file_input */
IntPtr result = Runtime.PyRun_String(code, flag, globals, locals);
Runtime.Decref(locals);
if (result == IntPtr.Zero)
{
return(null);
}
return(new PyObject(result));
}
/// <summary>
/// Dispose Method
/// </summary>
///
/// <remarks>
/// The Dispose method provides a way to explicitly release the
/// Python object represented by a PyObject instance. It is a good
/// idea to call Dispose on PyObjects that wrap resources that are
/// limited or need strict lifetime control. Otherwise, references
/// to Python objects will not be released until a managed garbage
/// collection occurs.
/// </remarks>
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
if (Runtime.Py_IsInitialized() > 0)
{
IntPtr gs = PythonEngine.AcquireLock();
Runtime.Decref(obj);
obj = IntPtr.Zero;
PythonEngine.ReleaseLock(gs);
}
disposed = true;
}
}
public static void Finalize(IPythonDerivedType obj)
{
FieldInfo fi = obj.GetType().GetField("__pyobj__");
CLRObject self = (CLRObject)fi.GetValue(obj);
// If python's been terminated then just free the gchandle.
lock (Runtime.IsFinalizingLock)
{
if (0 == Runtime.Py_IsInitialized() || Runtime.IsFinalizing)
{
self.gcHandle.Free();
return;
}
}
// delete the python object in an asnyc task as we may not be able to acquire
// the GIL immediately and we don't want to block the GC thread.
var t = Task.Factory.StartNew(() =>
{
lock (Runtime.IsFinalizingLock)
{
// If python's been terminated then just free the gchandle.
if (0 == Runtime.Py_IsInitialized() || Runtime.IsFinalizing)
{
self.gcHandle.Free();
return;
}
IntPtr gs = Runtime.PyGILState_Ensure();
try
{
// the C# object is being destroyed which must mean there are no more
// references to the Python object as well so now we can dealloc the
// python object.
IntPtr dict = Marshal.ReadIntPtr(self.pyHandle, ObjectOffset.DictOffset(self.pyHandle));
if (dict != IntPtr.Zero)
{
Runtime.Decref(dict);
}
Runtime.PyObject_GC_Del(self.pyHandle);
self.gcHandle.Free();
}
finally
{
Runtime.PyGILState_Release(gs);
}
}
});
}
/// <summary>
/// Dispose Method
/// </summary>
///
/// <remarks>
/// The Dispose method provides a way to explicitly release the
/// Python object represented by a PyObject instance. It is a good
/// idea to call Dispose on PyObjects that wrap resources that are
/// limited or need strict lifetime control. Otherwise, references
/// to Python objects will not be released until a managed garbage
/// collection occurs.
/// </remarks>
public void Dispose()
{
if (!disposed)
{
if (Runtime.Py_IsInitialized() > 0)
{
IntPtr gs = PythonEngine.AcquireLock();
Runtime.Decref(obj);
obj = IntPtr.Zero;
PythonEngine.ReleaseLock(gs);
}
GC.SuppressFinalize(this);
disposed = true;
}
}
//====================================================================
// MethodBinding __call__ implementation.
//====================================================================
public static IntPtr tp_call(IntPtr ob, IntPtr args, IntPtr kw)
{
MethodBinding self = (MethodBinding)GetManagedObject(ob);
// This works around a situation where the wrong generic method is picked,
// for example this method in the tests: string Overloaded<T>(int arg1, int arg2, string arg3)
if (self.info != null)
{
if (self.info.IsGenericMethod)
{
int len = Runtime.PyTuple_Size(args);
Type[] sigTp = Runtime.PythonArgsToTypeArray(args, true);
if (sigTp != null)
{
Type[] genericTp = self.info.GetGenericArguments();
MethodInfo betterMatch = MethodBinder.MatchSignatureAndParameters(self.m.info, genericTp, sigTp);
if (betterMatch != null)
{
self.info = betterMatch;
}
}
}
}
// This supports calling a method 'unbound', passing the instance
// as the first argument. Note that this is not supported if any
// of the overloads are static since we can't know if the intent
// was to call the static method or the unbound instance method.
if ((self.target == IntPtr.Zero) && (!self.m.IsStatic()))
{
int len = Runtime.PyTuple_Size(args);
if (len < 1)
{
Exceptions.SetError(Exceptions.TypeError, "not enough arguments");
return(IntPtr.Zero);
}
IntPtr uargs = Runtime.PyTuple_GetSlice(args, 1, len);
IntPtr inst = Runtime.PyTuple_GetItem(args, 0);
Runtime.Incref(inst);
IntPtr r = self.m.Invoke(inst, uargs, kw, self.info);
Runtime.Decref(inst);
Runtime.Decref(uargs);
return(r);
}
return(self.m.Invoke(self.target, args, kw, self.info));
}
//====================================================================
// Convert a Python value to a correctly typed managed array instance.
// The Python value must support the Python sequence protocol and the
// items in the sequence must be convertible to the target array type.
//====================================================================
static bool ToArray(IntPtr value, Type obType, out Object result,
bool setError)
{
Type elementType = obType.GetElementType();
int size = Runtime.PySequence_Size(value);
result = null;
if (size < 0)
{
if (setError)
{
SetConversionError(value, obType);
}
return(false);
}
Array items = Array.CreateInstance(elementType, size);
// XXX - is there a better way to unwrap this if it is a real
// array?
for (int i = 0; i < size; i++)
{
Object obj = null;
IntPtr item = Runtime.PySequence_GetItem(value, i);
if (item == IntPtr.Zero)
{
if (setError)
{
SetConversionError(value, obType);
return(false);
}
}
if (!Converter.ToManaged(item, elementType, out obj, true))
{
Runtime.Decref(item);
return(false);
}
items.SetValue(obj, i);
Runtime.Decref(item);
}
result = items;
return(true);
}
/// <summary>
/// Allows ctor selection to be limited to a single attempt at a
/// match by providing the MethodBase to use instead of searching
/// the entire MethodBinder.list (generic ArrayList)
/// </summary>
/// <param name="inst"> (possibly null) instance </param>
/// <param name="args"> PyObject* to the arg tuple </param>
/// <param name="kw"> PyObject* to the keyword args dict </param>
/// <param name="info"> The sole ContructorInfo to use or null </param>
/// <returns> The result of the constructor call with converted params </returns>
/// <remarks>
/// 2010-07-24 BC: I added the info parameter to the call to Bind()
/// Binding binding = this.Bind(inst, args, kw, info);
/// to take advantage of Bind()'s ability to use a single MethodBase (CI or MI).
/// </remarks>
internal object InvokeRaw(IntPtr inst, IntPtr args, IntPtr kw,
MethodBase info)
{
Binding binding = this.Bind(inst, args, kw, info);
Object result;
if (binding == null)
{
// It is possible for __new__ to be invoked on construction
// of a Python subclass of a managed class, so args may
// reflect more args than are required to instantiate the
// class. So if we cant find a ctor that matches, we'll see
// if there is a default constructor and, if so, assume that
// any extra args are intended for the subclass' __init__.
IntPtr eargs = Runtime.PyTuple_New(0);
binding = this.Bind(inst, eargs, kw);
Runtime.Decref(eargs);
if (binding == null)
{
Exceptions.SetError(Exceptions.TypeError,
"no constructor matches given arguments"
);
return(null);
}
}
// Fire the selected ctor and catch errors...
ConstructorInfo ci = (ConstructorInfo)binding.info;
// Object construction is presumed to be non-blocking and fast
// enough that we shouldn't really need to release the GIL.
try {
result = ci.Invoke(binding.args);
}
catch (Exception e) {
if (e.InnerException != null)
{
e = e.InnerException;
}
Exceptions.SetError(e);
return(null);
}
return(result);
}
//====================================================================
// Metatype __call__ implementation. This is needed to ensure correct
// initialization (__init__ support), because the tp_call we inherit
// from PyType_Type won't call __init__ for metatypes it doesnt know.
//====================================================================
public static IntPtr tp_call(IntPtr tp, IntPtr args, IntPtr kw)
{
IntPtr func = Marshal.ReadIntPtr(tp, TypeOffset.tp_new);
if (func == IntPtr.Zero)
{
return(Exceptions.RaiseTypeError("invalid object"));
}
IntPtr obj = NativeCall.Call_3(func, tp, args, kw);
if (obj == IntPtr.Zero)
{
return(IntPtr.Zero);
}
IntPtr py__init__ = Runtime.PyString_FromString("__init__");
IntPtr type = Runtime.PyObject_TYPE(obj);
IntPtr init = Runtime._PyType_Lookup(type, py__init__);
Runtime.Decref(py__init__);
Runtime.PyErr_Clear();
if (init != IntPtr.Zero)
{
IntPtr bound = Runtime.GetBoundArgTuple(obj, args);
if (bound == IntPtr.Zero)
{
Runtime.Decref(obj);
return(IntPtr.Zero);
}
IntPtr result = Runtime.PyObject_Call(init, bound, kw);
Runtime.Decref(bound);
if (result == IntPtr.Zero)
{
Runtime.Decref(obj);
return(IntPtr.Zero);
}
Runtime.Decref(result);
}
return(obj);
}
public CLRModule() : base("clr")
{
_namespace = String.Empty;
// This hackery is required in order to allow a plain Python to
// import the managed runtime via the CLR bootstrapper module.
// The standard Python machinery in control at the time of the
// import requires the module to pass PyModule_Check. :(
if (!hacked)
{
IntPtr type = this.tpHandle;
IntPtr mro = Marshal.ReadIntPtr(type, TypeOffset.tp_mro);
IntPtr ext = Runtime.ExtendTuple(mro, Runtime.PyModuleType);
Marshal.WriteIntPtr(type, TypeOffset.tp_mro, ext);
Runtime.Decref(mro);
hacked = true;
}
}
public object TrueDispatch(ArrayList args)
{
MethodInfo method = dtype.GetMethod("Invoke");
ParameterInfo[] pi = method.GetParameters();
IntPtr pyargs = Runtime.PyTuple_New(pi.Length);
Type rtype = method.ReturnType;
for (int i = 0; i < pi.Length; i++)
{
// Here we own the reference to the Python value, and we
// give the ownership to the arg tuple.
IntPtr arg = Converter.ToPython(args[i], pi[i].ParameterType);
Runtime.PyTuple_SetItem(pyargs, i, arg);
}
IntPtr op = Runtime.PyObject_Call(target, pyargs, IntPtr.Zero);
Runtime.Decref(pyargs);
if (op == IntPtr.Zero)
{
PythonException e = new PythonException();
throw e;
}
if (rtype == typeof(void))
{
return(null);
}
Object result = null;
if (!Converter.ToManaged(op, rtype, out result, false))
{
string s = "could not convert Python result to " +
rtype.ToString();
Runtime.Decref(op);
throw new ConversionException(s);
}
Runtime.Decref(op);
return(result);
}
