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Title: Replace magic offsets with proper offset calculation by lostmsu · Pull Request #1441 · pythonnet/pythonnet · GitHub

Open Graph Title: Replace magic offsets with proper offset calculation by lostmsu · Pull Request #1441 · pythonnet/pythonnet

X Title: Replace magic offsets with proper offset calculation by lostmsu · Pull Request #1441 · pythonnet/pythonnet

Description: All Python types created to represent CLR concepts derive from CLR MetaType (as before), which now has two new fields: tp_clr_inst_offset, which is similar to tp_dictoffset in that it tells where to find GCHandle in instances of this type (e.g. where to find GCHandle pointing to System.Uri in corresponding Python object) tp_clr_inst, which holds an optional instance of ManagedType, that implements the behavior of the type itself (e.g. GCHandle pointing to ClassObject(type = System.Uri)) So the layout of all Python types created by Python.NET is PyType type; nint tp_clr_inst_offset; GCHandle tp_clr_inst; // points, for example, to an instance of `ClassObject` When a Python type, that reflects CLR type is created (such as ), the layout of its instances will be: BaseTypeFields base; /*if not already in base*/ IntPtr dict; /*if not already in base*/ IntPtr weaklist; /*if not already in base*/ GCHandle gcHandle; // gcHandle points to `CLRObject` instance, which in turn, for example, points to the actual instance of `System.Uri` The offset to GC handle is recorded in the Python type's tp_clr_inst_offset, and can be found as PyObject_Type(inst).tp_clr_inst_offset. Or, preferably, accessor functions in ManagedType should be used, e.g. ManagedType.SetGCHandle(pyObj, gcHandle). Still uses TypeOffset until PyType use is widespread. Related This should (at least partially) supersede #1267 Notes Also removed some macro-like method copy-pastes from CPython and bits of dead code. Should not affect observed behavior.

Open Graph Description: All Python types created to represent CLR concepts derive from CLR MetaType (as before), which now has two new fields: tp_clr_inst_offset, which is similar to tp_dictoffset in that it tells where ...

X Description: All Python types created to represent CLR concepts derive from CLR MetaType (as before), which now has two new fields: tp_clr_inst_offset, which is similar to tp_dictoffset in that it tells where ...

Opengraph URL: https://github.com/pythonnet/pythonnet/pull/1441

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