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| author | Victor Stinner <vstinner@python.org> | 2021-04-02 13:45:37 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-04-02 13:45:37 (GMT) |
| commit | 3359cab038968935b40344fad7c30d211f9692e4 (patch) | |
| tree | 83d983230eac34582538556b7c50be688e900d1c /Doc/whatsnew | |
| parent | 442ad74fc2928b095760eb89aba93c28eab17f9b (diff) | |
| download | cpython-3359cab038968935b40344fad7c30d211f9692e4.zip cpython-3359cab038968935b40344fad7c30d211f9692e4.tar.gz cpython-3359cab038968935b40344fad7c30d211f9692e4.tar.bz2 | |
bpo-43688: Support the limited C API in debug mode (GH-25131)
The limited C API is now supported if Python is built in debug mode
(if the Py_DEBUG macro is defined). In the limited C API, the
Py_INCREF() and Py_DECREF() functions are now implemented as opaque
function calls, rather than accessing directly the PyObject.ob_refcnt
member, if Python is built in debug mode and the Py_LIMITED_API macro
targets Python 3.10 or newer. It became possible to support the
limited C API in debug mode because the PyObject structure is the
same in release and debug mode since Python 3.8 (see bpo-36465).
The limited C API is still not supported in the --with-trace-refs
special build (Py_TRACE_REFS macro).
Diffstat (limited to 'Doc/whatsnew')
| -rw-r--r-- | Doc/whatsnew/3.10.rst | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst index a8ff567..b84bcf9 100644 --- a/Doc/whatsnew/3.10.rst +++ b/Doc/whatsnew/3.10.rst @@ -1315,6 +1315,18 @@ New Features to simulate. (Contributed by Antoine Pitrou in :issue:`43356`.) +* The limited C API is now supported if Python is built in debug mode (if the + ``Py_DEBUG`` macro is defined). In the limited C API, the :c:func:`Py_INCREF` + and :c:func:`Py_DECREF` functions are now implemented as opaque function + calls, rather than accessing directly the :c:member:`PyObject.ob_refcnt` + member, if Python is built in debug mode and the ``Py_LIMITED_API`` macro + targets Python 3.10 or newer. It became possible to support the limited C API + in debug mode because the :c:type:`PyObject` structure is the same in release + and debug mode since Python 3.8 (see :issue:`36465`). + + The limited C API is still not supported in the ``--with-trace-refs`` special + build (``Py_TRACE_REFS`` macro). + (Contributed by Victor Stinner in :issue:`43688`.) Porting to Python 3.10 ---------------------- |