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Corrected an error in the information on supporting weak references in 

extension types (the docs reflected a development version of the API).

This closes SF bug #435066.
This commit is contained in:
Fred Drake 2001-06-22 17:20:29 +00:00
parent 9ca78ac57f
commit f66cb5d0eb
1 changed files with 7 additions and 9 deletions
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16
Doc/lib/libweakref.tex
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@ -226,28 +226,26 @@ PyTypeObject PyInstance_Type = {
0, 0,
"instance", "instance",
/* lots of stuff omitted for brevity */ /* Lots of stuff omitted for brevity... */
offsetof(PyInstanceObject, in_weakreflist) /* tp_weaklistoffset */ offsetof(PyInstanceObject, in_weakreflist) /* tp_weaklistoffset */
}; };
\end{verbatim} \end{verbatim}
The only further addition is that the destructor needs to call the The only further addition is that the destructor needs to call the
weak reference manager to clear any weak references and return if the weak reference manager to clear any weak references. This should be
object has been resurrected. This needs to occur before any other done before any other parts of the destruction have occurred:
parts of the destruction have occurred:
\begin{verbatim} \begin{verbatim}
static void static void
instance_dealloc(PyInstanceObject *inst) instance_dealloc(PyInstanceObject *inst)
{ {
/* allocate tempories if needed, but do not begin /* Allocate tempories if needed, but do not begin
destruction here destruction just yet.
*/ */
if (!PyObject_ClearWeakRefs((PyObject *) inst)) PyObject_ClearWeakRefs((PyObject *) inst);
return;
/* proceed with object destuction normally */ /* Proceed with object destuction normally. */
} }
\end{verbatim} \end{verbatim}