/// <summary> /// The following CreateType implementations do the necessary work to /// create Python types to represent managed extension types, reflected /// types, subclasses of reflected types and the managed metatype. The /// dance is slightly different for each kind of type due to different /// behavior needed and the desire to have the existing Python runtime /// do as much of the allocation and initialization work as possible. /// </summary> internal static IntPtr CreateType(Type impl) { IntPtr type = AllocateTypeObject(impl.Name); int ob_size = ObjectOffset.Size(type); // Set tp_basicsize to the size of our managed instance objects. Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); var offset = (IntPtr)ObjectOffset.TypeDictOffset(type); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset); SlotsHolder slotsHolder = CreateSolotsHolder(type); InitializeSlots(type, impl, slotsHolder); int flags = TypeFlags.Default | TypeFlags.Managed | TypeFlags.HeapType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); if (Runtime.PyType_Ready(type) != 0) { throw new PythonException(); } IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItem(dict, PyIdentifier.__module__, mod); Runtime.XDecref(mod); InitMethods(type, impl); return(type); }
/// <summary> /// The following CreateType implementations do the necessary work to /// create Python types to represent managed extension types, reflected /// types, subclasses of reflected types and the managed metatype. The /// dance is slightly different for each kind of type due to different /// behavior needed and the desire to have the existing Python runtime /// do as much of the allocation and initialization work as possible. /// </summary> internal static IntPtr CreateType(Type impl) { IntPtr type = AllocateTypeObject(impl.Name); int ob_size = ObjectOffset.Size(type); // Set tp_basicsize to the size of our managed instance objects. Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); var offset = (IntPtr)ObjectOffset.DictOffset(type); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset); InitializeSlots(type, impl); int flags = TypeFlags.Default | TypeFlags.Managed | TypeFlags.HeapType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); Runtime.PyType_Ready(type); IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItemString(dict, "__module__", mod); InitMethods(type, impl); return(type); }
internal static IntPtr CreateMetaType(Type impl, out SlotsHolder slotsHolder) { // The managed metatype is functionally little different than the // standard Python metatype (PyType_Type). It overrides certain of // the standard type slots, and has to subclass PyType_Type for // certain functions in the C runtime to work correctly with it. IntPtr type = AllocateTypeObject("CLR Metatype", metatype: Runtime.PyTypeType); IntPtr py_type = Runtime.PyTypeType; Marshal.WriteIntPtr(type, TypeOffset.tp_base, py_type); Runtime.XIncref(py_type); int size = Marshal.ReadInt32(Runtime.PyTypeType, TypeOffset.tp_basicsize) + IntPtr.Size // tp_clr_inst_offset + IntPtr.Size // tp_clr_inst ; Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, new IntPtr(size)); Marshal.WriteInt32(type, ManagedType.Offsets.tp_clr_inst_offset, ManagedType.Offsets.tp_clr_inst); const TypeFlags flags = TypeFlags.Default | TypeFlags.HeapType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, (int)flags); // Slots will inherit from TypeType, it's not neccesary for setting them. // Inheried slots: // tp_basicsize, tp_itemsize, // tp_dictoffset, tp_weaklistoffset, // tp_traverse, tp_clear, tp_is_gc, etc. slotsHolder = SetupMetaSlots(impl, type); if (Runtime.PyType_Ready(type) != 0) { throw new PythonException(); } IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItemString(dict, "__module__", mod); // The type has been modified after PyType_Ready has been called // Refresh the type Runtime.PyType_Modified(type); //DebugUtil.DumpType(type); return(type); }
internal static IntPtr BasicSubType(string name, IntPtr base_, Type impl) { // Utility to create a subtype of a std Python type, but with // a managed type able to override implementation IntPtr type = AllocateTypeObject(name, metatype: Runtime.PyTypeType); //Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)obSize); //Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero); //IntPtr offset = (IntPtr)ObjectOffset.ob_dict; //Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset); //IntPtr dc = Runtime.PyDict_Copy(dict); //Marshal.WriteIntPtr(type, TypeOffset.tp_dict, dc); Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_); Runtime.XIncref(base_); var flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, (int)flags); CopySlot(base_, type, TypeOffset.tp_traverse); CopySlot(base_, type, TypeOffset.tp_clear); CopySlot(base_, type, TypeOffset.tp_is_gc); SlotsHolder slotsHolder = CreateSolotsHolder(type); InitializeSlots(type, impl, slotsHolder); if (Runtime.PyType_Ready(type) != 0) { throw new PythonException(); } IntPtr tp_dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItem(tp_dict, PyIdentifier.__module__, mod); // The type has been modified after PyType_Ready has been called // Refresh the type Runtime.PyType_Modified(type); return(type); }
/// <summary> /// The following CreateType implementations do the necessary work to /// create Python types to represent managed extension types, reflected /// types, subclasses of reflected types and the managed metatype. The /// dance is slightly different for each kind of type due to different /// behavior needed and the desire to have the existing Python runtime /// do as much of the allocation and initialization work as possible. /// </summary> internal static unsafe IntPtr CreateType(Type impl) { IntPtr type = AllocateTypeObject(impl.Name, metatype: Runtime.PyCLRMetaType); IntPtr base_ = impl == typeof(CLRModule) ? Runtime.PyModuleType : Runtime.PyBaseObjectType; int newFieldOffset = InheritOrAllocateStandardFields(type, base_); int tp_clr_inst_offset = newFieldOffset; newFieldOffset += IntPtr.Size; int ob_size = newFieldOffset; // Set tp_basicsize to the size of our managed instance objects. Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); Marshal.WriteInt32(type, ManagedType.Offsets.tp_clr_inst_offset, tp_clr_inst_offset); Marshal.WriteIntPtr(type, TypeOffset.tp_new, (IntPtr)Runtime.Delegates.PyType_GenericNew); SlotsHolder slotsHolder = CreateSolotsHolder(type); InitializeSlots(type, impl, slotsHolder); var flags = TypeFlags.Default | TypeFlags.HasClrInstance | TypeFlags.HeapType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, (int)flags); if (Runtime.PyType_Ready(type) != 0) { throw new PythonException(); } var dict = new BorrowedReference(Marshal.ReadIntPtr(type, TypeOffset.tp_dict)); var mod = NewReference.DangerousFromPointer(Runtime.PyString_FromString("CLR")); Runtime.PyDict_SetItem(dict, PyIdentifier.__module__, mod); mod.Dispose(); InitMethods(type, impl); // The type has been modified after PyType_Ready has been called // Refresh the type Runtime.PyType_Modified(type); return(type); }
internal static IntPtr BasicSubType(string name, IntPtr base_, Type impl) { // Utility to create a subtype of a std Python type, but with // a managed type able to override implementation IntPtr type = AllocateTypeObject(name); //Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)obSize); //Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero); //IntPtr offset = (IntPtr)ObjectOffset.ob_dict; //Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset); //IntPtr dc = Runtime.PyDict_Copy(dict); //Marshal.WriteIntPtr(type, TypeOffset.tp_dict, dc); Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_); Runtime.XIncref(base_); int flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); CopySlot(base_, type, TypeOffset.tp_traverse); CopySlot(base_, type, TypeOffset.tp_clear); CopySlot(base_, type, TypeOffset.tp_is_gc); InitializeSlots(type, impl); Runtime.PyType_Ready(type); IntPtr tp_dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItemString(tp_dict, "__module__", mod); Runtime.Py_DecRef(mod); return(type); }
/// <summary> /// The following CreateType implementations do the necessary work to /// create Python types to represent managed extension types, reflected /// types, subclasses of reflected types and the managed metatype. The /// dance is slightly different for each kind of type due to different /// behavior needed and the desire to have the existing Python runtime /// do as much of the allocation and initialization work as possible. /// </summary> internal static IntPtr CreateType(Type impl) { IntPtr type = AllocateTypeObject(impl.Name, metatype: Runtime.PyTypeType); int ob_size = ObjectOffset.Size(type); // Set tp_basicsize to the size of our managed instance objects. Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); var offset = (IntPtr)ObjectOffset.TypeDictOffset(type); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset); SlotsHolder slotsHolder = CreateSolotsHolder(type); InitializeSlots(type, impl, slotsHolder); var flags = TypeFlags.Default | TypeFlags.Managed | TypeFlags.HeapType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, (int)flags); if (Runtime.PyType_Ready(type) != 0) { throw new PythonException(); } var dict = new BorrowedReference(Marshal.ReadIntPtr(type, TypeOffset.tp_dict)); var mod = NewReference.DangerousFromPointer(Runtime.PyString_FromString("CLR")); Runtime.PyDict_SetItem(dict, PyIdentifier.__module__, mod); mod.Dispose(); InitMethods(type, impl); // The type has been modified after PyType_Ready has been called // Refresh the type Runtime.PyType_Modified(type); return(type); }
/// <summary> /// The following CreateType implementations do the necessary work to /// create Python types to represent managed extension types, reflected /// types, subclasses of reflected types and the managed metatype. The /// dance is slightly different for each kind of type due to different /// behavior needed and the desire to have the existing Python runtime /// do as much of the allocation and initialization work as possible. /// </summary> internal static IntPtr CreateType(Type impl) { string name = impl.Name; // Create new names per instance for Dynamic Objects - Arturo Rodriguez if (impl == typeof(QuantApp.Kernel.JVM.JVMObject) || impl == typeof(System.Dynamic.DynamicObject)) { name += System.Guid.NewGuid().ToString().Replace("-", "_"); } IntPtr type = AllocateTypeObject(name); int ob_size = ObjectOffset.Size(type); // Set tp_basicsize to the size of our managed instance objects. Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); var offset = (IntPtr)ObjectOffset.DictOffset(type); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, offset); InitializeSlots(type, impl); int flags = TypeFlags.Default | TypeFlags.Managed | TypeFlags.HeapType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); Runtime.PyType_Ready(type); IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItemString(dict, "__module__", mod); InitMethods(type, impl); return(type); }
internal static IntPtr CreateMetaType(Type impl) { // The managed metatype is functionally little different than the // standard Python metatype (PyType_Type). It overrides certain of // the standard type slots, and has to subclass PyType_Type for // certain functions in the C runtime to work correctly with it. IntPtr type = AllocateTypeObject("CLR Metatype"); IntPtr py_type = Runtime.PyTypeType; Marshal.WriteIntPtr(type, TypeOffset.tp_base, py_type); Runtime.XIncref(py_type); // Copy gc and other type slots from the base Python metatype. CopySlot(py_type, type, TypeOffset.tp_basicsize); CopySlot(py_type, type, TypeOffset.tp_itemsize); CopySlot(py_type, type, TypeOffset.tp_dictoffset); CopySlot(py_type, type, TypeOffset.tp_weaklistoffset); CopySlot(py_type, type, TypeOffset.tp_traverse); CopySlot(py_type, type, TypeOffset.tp_clear); CopySlot(py_type, type, TypeOffset.tp_is_gc); // Override type slots with those of the managed implementation. InitializeSlots(type, impl); int flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); // We need space for 3 PyMethodDef structs, each of them // 4 int-ptrs in size. IntPtr mdef = Runtime.PyMem_Malloc(3 * 4 * IntPtr.Size); IntPtr mdefStart = mdef; mdef = WriteMethodDef( mdef, "__instancecheck__", Interop.GetThunk(typeof(MetaType).GetMethod("__instancecheck__"), "BinaryFunc") ); mdef = WriteMethodDef( mdef, "__subclasscheck__", Interop.GetThunk(typeof(MetaType).GetMethod("__subclasscheck__"), "BinaryFunc") ); // FIXME: mdef is not used mdef = WriteMethodDefSentinel(mdef); Marshal.WriteIntPtr(type, TypeOffset.tp_methods, mdefStart); Runtime.PyType_Ready(type); IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); IntPtr mod = Runtime.PyString_FromString("CLR"); Runtime.PyDict_SetItemString(dict, "__module__", mod); //DebugUtil.DumpType(type); return(type); }
internal static IntPtr CreateType(ManagedType impl, Type clrType) { // Cleanup the type name to get rid of funny nested type names. string name = "CLR." + clrType.FullName; int i = name.LastIndexOf('+'); if (i > -1) { name = name.Substring(i + 1); } i = name.LastIndexOf('.'); if (i > -1) { name = name.Substring(i + 1); } IntPtr base_ = IntPtr.Zero; int ob_size = ObjectOffset.Size(Runtime.PyTypeType); int tp_dictoffset = ObjectOffset.DictOffset(Runtime.PyTypeType); // XXX Hack, use a different base class for System.Exception // Python 2.5+ allows new style class exceptions but they *must* // subclass BaseException (or better Exception). if (typeof(Exception).IsAssignableFrom(clrType)) { ob_size = ObjectOffset.Size(Exceptions.Exception); tp_dictoffset = ObjectOffset.DictOffset(Exceptions.Exception); } if (clrType == typeof(Exception)) { base_ = Exceptions.Exception; } else if (clrType.BaseType != null) { ClassBase bc = ClassManager.GetClass(clrType.BaseType); base_ = bc.pyHandle; } IntPtr type = AllocateTypeObject(name); Marshal.WriteIntPtr(type, TypeOffset.ob_type, Runtime.PyCLRMetaType); Runtime.XIncref(Runtime.PyCLRMetaType); Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, (IntPtr)tp_dictoffset); InitializeSlots(type, impl.GetType()); if (base_ != IntPtr.Zero) { Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_); Runtime.XIncref(base_); } int flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.BaseType; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); // Leverage followup initialization from the Python runtime. Note // that the type of the new type must PyType_Type at the time we // call this, else PyType_Ready will skip some slot initialization. Runtime.PyType_Ready(type); IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); string mn = clrType.Namespace ?? ""; IntPtr mod = Runtime.PyString_FromString(mn); Runtime.PyDict_SetItemString(dict, "__module__", mod); // Hide the gchandle of the implementation in a magic type slot. GCHandle gc = GCHandle.Alloc(impl); Marshal.WriteIntPtr(type, TypeOffset.magic(), (IntPtr)gc); // Set the handle attributes on the implementing instance. impl.tpHandle = Runtime.PyCLRMetaType; impl.gcHandle = gc; impl.pyHandle = type; //DebugUtil.DumpType(type); return(type); }
internal static IntPtr CreateType(ManagedType impl, Type clrType) { // Cleanup the type name to get rid of funny nested type names. string name = $"clr.{clrType.FullName}"; int i = name.LastIndexOf('+'); if (i > -1) { name = name.Substring(i + 1); } i = name.LastIndexOf('.'); if (i > -1) { name = name.Substring(i + 1); } IntPtr base_ = IntPtr.Zero; int ob_size = ObjectOffset.Size(Runtime.PyTypeType); // XXX Hack, use a different base class for System.Exception // Python 2.5+ allows new style class exceptions but they *must* // subclass BaseException (or better Exception). if (typeof(Exception).IsAssignableFrom(clrType)) { ob_size = ObjectOffset.Size(Exceptions.Exception); } int tp_dictoffset = ob_size + ManagedDataOffsets.ob_dict; if (clrType == typeof(Exception)) { base_ = Exceptions.Exception; } else if (clrType.BaseType != null) { ClassBase bc = ClassManager.GetClass(clrType.BaseType); base_ = bc.pyHandle; } IntPtr type = AllocateTypeObject(name, Runtime.PyCLRMetaType); Marshal.WriteIntPtr(type, TypeOffset.ob_type, Runtime.PyCLRMetaType); Runtime.XIncref(Runtime.PyCLRMetaType); Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, (IntPtr)tp_dictoffset); // we want to do this after the slot stuff above in case the class itself implements a slot method SlotsHolder slotsHolder = CreateSolotsHolder(type); InitializeSlots(type, impl.GetType(), slotsHolder); if (Marshal.ReadIntPtr(type, TypeOffset.mp_length) == IntPtr.Zero && mp_length_slot.CanAssign(clrType)) { InitializeSlot(type, TypeOffset.mp_length, mp_length_slot.Method, slotsHolder); } if (!typeof(IEnumerable).IsAssignableFrom(clrType) && !typeof(IEnumerator).IsAssignableFrom(clrType)) { // The tp_iter slot should only be set for enumerable types. Marshal.WriteIntPtr(type, TypeOffset.tp_iter, IntPtr.Zero); } // Only set mp_subscript and mp_ass_subscript for types with indexers if (impl is ClassBase cb) { if (!(impl is ArrayObject)) { if (cb.indexer == null || !cb.indexer.CanGet) { Marshal.WriteIntPtr(type, TypeOffset.mp_subscript, IntPtr.Zero); } if (cb.indexer == null || !cb.indexer.CanSet) { Marshal.WriteIntPtr(type, TypeOffset.mp_ass_subscript, IntPtr.Zero); } } } else { Marshal.WriteIntPtr(type, TypeOffset.mp_subscript, IntPtr.Zero); Marshal.WriteIntPtr(type, TypeOffset.mp_ass_subscript, IntPtr.Zero); } if (base_ != IntPtr.Zero) { Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_); Runtime.XIncref(base_); } const TypeFlags flags = TypeFlags.Default | TypeFlags.Managed | TypeFlags.HeapType | TypeFlags.BaseType | TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, (int)flags); OperatorMethod.FixupSlots(type, clrType); // Leverage followup initialization from the Python runtime. Note // that the type of the new type must PyType_Type at the time we // call this, else PyType_Ready will skip some slot initialization. if (Runtime.PyType_Ready(type) != 0) { throw new PythonException(); } var dict = new BorrowedReference(Marshal.ReadIntPtr(type, TypeOffset.tp_dict)); string mn = clrType.Namespace ?? ""; var mod = NewReference.DangerousFromPointer(Runtime.PyString_FromString(mn)); Runtime.PyDict_SetItem(dict, PyIdentifier.__module__, mod); mod.Dispose(); // Hide the gchandle of the implementation in a magic type slot. GCHandle gc = impl.AllocGCHandle(); Marshal.WriteIntPtr(type, TypeOffset.magic(), (IntPtr)gc); // Set the handle attributes on the implementing instance. impl.tpHandle = type; impl.pyHandle = type; //DebugUtil.DumpType(type); return(type); }
internal static IntPtr CreateType(ManagedType impl, Type clrType) { // Cleanup the type name to get rid of funny nested type names. string name = "CLR." + clrType.FullName; int i = name.LastIndexOf('+'); if (i > -1) { name = name.Substring(i + 1); } i = name.LastIndexOf('.'); if (i > -1) { name = name.Substring(i + 1); } IntPtr base_ = IntPtr.Zero; int ob_size = ObjectOffset.Size(Runtime.PyTypeType); // XXX Hack, use a different base class for System.Exception // Python 2.5+ allows new style class exceptions but they *must* // subclass BaseException (or better Exception). if (typeof(Exception).IsAssignableFrom(clrType)) { ob_size = ObjectOffset.Size(Exceptions.Exception); } int tp_dictoffset = ob_size + ManagedDataOffsets.ob_dict; if (clrType == typeof(Exception)) { base_ = Exceptions.Exception; } else if (clrType.BaseType != null) { ClassBase bc = ClassManager.GetClass(clrType.BaseType); base_ = bc.pyHandle; } IntPtr type = AllocateTypeObject(name); Marshal.WriteIntPtr(type, TypeOffset.ob_type, Runtime.PyCLRMetaType); Runtime.XIncref(Runtime.PyCLRMetaType); Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size); Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero); Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, (IntPtr)tp_dictoffset); // add a __len__ slot for inheritors of ICollection and ICollection<> if (typeof(ICollection).IsAssignableFrom(clrType) || clrType.GetInterfaces().Any(x => x.IsGenericType && x.GetGenericTypeDefinition() == typeof(ICollection <>))) { InitializeSlot(type, TypeOffset.mp_length, typeof(mp_length_slot).GetMethod(nameof(mp_length_slot.mp_length))); } // we want to do this after the slot stuff above in case the class itself implements a slot method InitializeSlots(type, impl.GetType()); if (!typeof(IEnumerable).IsAssignableFrom(clrType) && !typeof(IEnumerator).IsAssignableFrom(clrType)) { // The tp_iter slot should only be set for enumerable types. Marshal.WriteIntPtr(type, TypeOffset.tp_iter, IntPtr.Zero); } // Only set mp_subscript and mp_ass_subscript for types with indexers if (impl is ClassBase cb) { if (!(impl is ArrayObject)) { if (cb.indexer == null || !cb.indexer.CanGet) { Marshal.WriteIntPtr(type, TypeOffset.mp_subscript, IntPtr.Zero); } if (cb.indexer == null || !cb.indexer.CanSet) { Marshal.WriteIntPtr(type, TypeOffset.mp_ass_subscript, IntPtr.Zero); } } } else { Marshal.WriteIntPtr(type, TypeOffset.mp_subscript, IntPtr.Zero); Marshal.WriteIntPtr(type, TypeOffset.mp_ass_subscript, IntPtr.Zero); } if (base_ != IntPtr.Zero) { Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_); Runtime.XIncref(base_); } int flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.BaseType; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); // Leverage followup initialization from the Python runtime. Note // that the type of the new type must PyType_Type at the time we // call this, else PyType_Ready will skip some slot initialization. Runtime.PyType_Ready(type); IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict); string mn = clrType.Namespace ?? ""; IntPtr mod = Runtime.PyString_FromString(mn); Runtime.PyDict_SetItemString(dict, "__module__", mod); // Hide the gchandle of the implementation in a magic type slot. GCHandle gc = GCHandle.Alloc(impl); Marshal.WriteIntPtr(type, TypeOffset.magic(), (IntPtr)gc); // Set the handle attributes on the implementing instance. impl.tpHandle = Runtime.PyCLRMetaType; impl.gcHandle = gc; impl.pyHandle = type; //DebugUtil.DumpType(type); return(type); }
/// <summary> /// Metatype __new__ implementation. This is called to create a new /// class / type when a reflected class is subclassed. /// </summary> public static IntPtr tp_new(IntPtr tp, IntPtr args, IntPtr kw) { int len = Runtime.PyTuple_Size(args); if (len < 3) { return(Exceptions.RaiseTypeError("invalid argument list")); } IntPtr name = Runtime.PyTuple_GetItem(args, 0); IntPtr bases = Runtime.PyTuple_GetItem(args, 1); IntPtr dict = Runtime.PyTuple_GetItem(args, 2); // We do not support multiple inheritance, so the bases argument // should be a 1-item tuple containing the type we are subtyping. // That type must itself have a managed implementation. We check // that by making sure its metatype is the CLR metatype. if (Runtime.PyTuple_Size(bases) != 1) { return(Exceptions.RaiseTypeError("cannot use multiple inheritance with managed classes")); } IntPtr base_type = Runtime.PyTuple_GetItem(bases, 0); IntPtr mt = Runtime.PyObject_TYPE(base_type); if (!(mt == PyCLRMetaType || mt == Runtime.PyTypeType)) { return(Exceptions.RaiseTypeError("invalid metatype")); } // Ensure that the reflected type is appropriate for subclassing, // disallowing subclassing of delegates, enums and array types. var cb = GetManagedObject(base_type) as ClassBase; if (cb != null) { if (!cb.CanSubclass()) { return(Exceptions.RaiseTypeError("delegates, enums and array types cannot be subclassed")); } } IntPtr slots = Runtime.PyDict_GetItemString(dict, "__slots__"); if (slots != IntPtr.Zero) { return(Exceptions.RaiseTypeError("subclasses of managed classes do not support __slots__")); } // If __assembly__ or __namespace__ are in the class dictionary then create // a managed sub type. // This creates a new managed type that can be used from .net to call back // into python. if (IntPtr.Zero != dict) { Runtime.XIncref(dict); using (var clsDict = new PyDict(dict)) { if (clsDict.HasKey("__assembly__") || clsDict.HasKey("__namespace__")) { return(TypeManager.CreateSubType(name, base_type, dict)); } } } // otherwise just create a basic type without reflecting back into the managed side. IntPtr func = Marshal.ReadIntPtr(Runtime.PyTypeType, TypeOffset.tp_new); IntPtr type = NativeCall.Call_3(func, tp, args, kw); if (type == IntPtr.Zero) { return(IntPtr.Zero); } int flags = TypeFlags.Default; flags |= TypeFlags.Managed; flags |= TypeFlags.HeapType; flags |= TypeFlags.BaseType; flags |= TypeFlags.Subclass; flags |= TypeFlags.HaveGC; Util.WriteCLong(type, TypeOffset.tp_flags, flags); TypeManager.CopySlot(base_type, type, TypeOffset.tp_dealloc); // Hmm - the standard subtype_traverse, clear look at ob_size to // do things, so to allow gc to work correctly we need to move // our hidden handle out of ob_size. Then, in theory we can // comment this out and still not crash. TypeManager.CopySlot(base_type, type, TypeOffset.tp_traverse); TypeManager.CopySlot(base_type, type, TypeOffset.tp_clear); // for now, move up hidden handle... IntPtr gc = Marshal.ReadIntPtr(base_type, TypeOffset.magic()); Marshal.WriteIntPtr(type, TypeOffset.magic(), gc); return(type); }