diff options
Diffstat (limited to 'Doc/whatsnew/3.9.rst')
| -rw-r--r-- | Doc/whatsnew/3.9.rst | 49 |
1 files changed, 42 insertions, 7 deletions
diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst index 66caf3f..d127e0a 100644 --- a/Doc/whatsnew/3.9.rst +++ b/Doc/whatsnew/3.9.rst @@ -319,13 +319,6 @@ Optimizations Build and C API Changes ======================= -* Provide :c:func:`Py_EnterRecursiveCall` and :c:func:`Py_LeaveRecursiveCall` - as regular functions for the limited API. Previously, there were defined as - macros, but these macros didn't work with the limited API which cannot access - ``PyThreadState.recursion_depth`` field. Remove ``_Py_CheckRecursionLimit`` - from the stable ABI. - (Contributed by Victor Stinner in :issue:`38644`.) - * Add a new public :c:func:`PyObject_CallNoArgs` function to the C API, which calls a callable Python object without any arguments. It is the most efficient way to call a callable Python object without any argument. @@ -359,6 +352,48 @@ Build and C API Changes * The ``COUNT_ALLOCS`` special build macro has been removed. (Contributed by Victor Stinner in :issue:`39489`.) +* Changes in the limited C API (if ``Py_LIMITED_API`` macro is defined): + + * Provide :c:func:`Py_EnterRecursiveCall` and :c:func:`Py_LeaveRecursiveCall` + as regular functions for the limited API. Previously, there were defined as + macros, but these macros didn't work with the limited API which cannot + access ``PyThreadState.recursion_depth`` field. + + * Exclude the following functions from the limited C API: + + * ``_Py_CheckRecursionLimit`` + * ``_Py_NewReference()`` + * ``_Py_ForgetReference()`` + * ``_PyTraceMalloc_NewReference()`` + * ``_Py_GetRefTotal()`` + * The trashcan mechanism which never worked in the limited C API. + * ``PyTrash_UNWIND_LEVEL`` + * ``Py_TRASHCAN_BEGIN_CONDITION`` + * ``Py_TRASHCAN_BEGIN`` + * ``Py_TRASHCAN_END`` + * ``Py_TRASHCAN_SAFE_BEGIN`` + * ``Py_TRASHCAN_SAFE_END`` + + * The following static inline functions or macros become regular "opaque" + function to hide implementation details: + + * ``_Py_NewReference()`` + * ``PyObject_INIT()`` and ``PyObject_INIT_VAR()`` become aliases to + :c:func:`PyObject_Init` and :c:func:`PyObject_InitVar` in the limited C + API, but are overriden with static inline function otherwise. Thanks to + that, it was possible to exclude ``_Py_NewReference()`` from the limited + C API. + + * Move following functions and definitions to the internal C API: + + * ``_PyDebug_PrintTotalRefs()`` + * ``_Py_PrintReferences()`` + * ``_Py_PrintReferenceAddresses()`` + * ``_Py_tracemalloc_config`` + * ``_Py_AddToAllObjects()`` (specific to ``Py_TRACE_REFS`` build) + + (Contributed by Victor Stinner in :issue:`38644` and :issue:`39542`.) + Deprecated ========== |