internal static bool TryFreeGCHandle(BorrowedReference reflectedClrObject, BorrowedReference type)
{
Debug.Assert(type != null);
Debug.Assert(reflectedClrObject != null);
Debug.Assert(IsManagedType(type) || IsManagedType(reflectedClrObject));
Debug.Assert(Runtime.PyObject_TypeCheck(reflectedClrObject, type));
int offset = Util.ReadInt32(type, Offsets.tp_clr_inst_offset);
Debug.Assert(offset > 0);
IntPtr raw = Util.ReadIntPtr(reflectedClrObject, offset);
if (raw == IntPtr.Zero)
{
return(false);
}
var handle = (GCHandle)raw;
handle.Free();
Util.WriteIntPtr(reflectedClrObject, offset, IntPtr.Zero);
return(true);
}
protected static void SetObjectDictNullable(BorrowedReference ob, StolenReference value)
{
BorrowedReference type = Runtime.PyObject_TYPE(ob);
int instanceDictOffset = Util.ReadInt32(type, TypeOffset.tp_dictoffset);
Debug.Assert(instanceDictOffset > 0);
Runtime.ReplaceReference(ob, instanceDictOffset, value.AnalyzerWorkaround());
}
protected static BorrowedReference GetObjectDict(BorrowedReference ob)
{
BorrowedReference type = Runtime.PyObject_TYPE(ob);
int instanceDictOffset = Util.ReadInt32(type, TypeOffset.tp_dictoffset);
Debug.Assert(instanceDictOffset > 0);
return(Util.ReadRef(ob, instanceDictOffset));
}
protected static void ClearObjectDict(BorrowedReference ob)
{
BorrowedReference type = Runtime.PyObject_TYPE(ob);
int instanceDictOffset = Util.ReadInt32(type, TypeOffset.tp_dictoffset);
Debug.Assert(instanceDictOffset > 0);
Runtime.Py_CLEAR(ob, instanceDictOffset);
}
static Offsets()
{
int pyTypeSize = Util.ReadInt32(Runtime.PyTypeType, TypeOffset.tp_basicsize);
if (pyTypeSize < 0)
{
throw new InvalidOperationException();
}
tp_clr_inst_offset = pyTypeSize;
tp_clr_inst = tp_clr_inst_offset + IntPtr.Size;
}
internal static void GetGCHandle(BorrowedReference reflectedClrObject, BorrowedReference type, out IntPtr handle)
{
Debug.Assert(reflectedClrObject != null);
Debug.Assert(IsManagedType(type) || IsManagedType(reflectedClrObject));
Debug.Assert(Runtime.PyObject_TypeCheck(reflectedClrObject, type));
int gcHandleOffset = Util.ReadInt32(type, Offsets.tp_clr_inst_offset);
Debug.Assert(gcHandleOffset > 0);
handle = Util.ReadIntPtr(reflectedClrObject, gcHandleOffset);
}
internal static void SetGCHandle(BorrowedReference reflectedClrObject, BorrowedReference type, GCHandle newHandle)
{
Debug.Assert(type != null);
Debug.Assert(reflectedClrObject != null);
Debug.Assert(IsManagedType(type) || IsManagedType(reflectedClrObject));
Debug.Assert(Runtime.PyObject_TypeCheck(reflectedClrObject, type));
int offset = Util.ReadInt32(type, Offsets.tp_clr_inst_offset);
Debug.Assert(offset > 0);
Util.WriteIntPtr(reflectedClrObject, offset, (IntPtr)newHandle);
}
