pythonnet/src/runtime/managedtype.cs at drop-python2 · filmor/pythonnet · GitHub

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using System;

using System.Runtime.InteropServices;

namespace Python.Runtime

{

/// <summary>

/// Common base class for all objects that are implemented in managed

/// code. It defines the common fields that associate CLR and Python

/// objects and common utilities to convert between those identities.

/// </summary>

internal abstract class ManagedType

{

internal GCHandle gcHandle; // Native handle

internal IntPtr pyHandle; // PyObject *

internal IntPtr tpHandle; // PyType *

/// <summary>

/// Given a Python object, return the associated managed object or null.

/// </summary>

internal static ManagedType GetManagedObject(IntPtr ob)

{

if (ob != IntPtr.Zero)

{

IntPtr tp = Runtime.PyObject_TYPE(ob);

if (tp == Runtime.PyTypeType || tp == Runtime.PyCLRMetaType)

{

tp = ob;

}

var flags = Util.ReadCLong(tp, TypeOffset.tp_flags);

if ((flags & TypeFlags.Managed) != 0)

{

IntPtr op = tp == ob

? Marshal.ReadIntPtr(tp, TypeOffset.magic())

: Marshal.ReadIntPtr(ob, ObjectOffset.magic(tp));

if (op == IntPtr.Zero)

{

return null;

}

var gc = (GCHandle)op;

return (ManagedType)gc.Target;

}

return null;

}

internal static ManagedType GetManagedObjectErr(IntPtr ob)

{

ManagedType result = GetManagedObject(ob);

if (result == null)

{

Exceptions.SetError(Exceptions.TypeError, "invalid argument, expected CLR type");

}

return result;

}

internal static bool IsManagedType(IntPtr ob)

{

if (ob != IntPtr.Zero)

{

IntPtr tp = Runtime.PyObject_TYPE(ob);

if (tp == Runtime.PyTypeType || tp == Runtime.PyCLRMetaType)

{

tp = ob;

}

var flags = Util.ReadCLong(tp, TypeOffset.tp_flags);

if ((flags & TypeFlags.Managed) != 0)

{

return true;

}

return false;

}

pythonnet/src/runtime/managedtype.cs at drop-python2 · filmor/pythonnet · GitHub

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