Description

assignee = None
closed_at = <Date 2021-10-21.13:30:09.065>
created_at = <Date 2021-07-12.15:05:02.827>
labels = ['type-bug', '3.10', 'build']
title = 'Buffer support in the stable ABI'
updated_at = <Date 2021-10-21.13:30:09.061>
user = 'https://bugs.python.org/tarunjohar'

activity = <Date 2021-10-21.13:30:09.061>
actor = 'petr.viktorin'
assignee = 'none'
closed = True
closed_date = <Date 2021-10-21.13:30:09.065>
closer = 'petr.viktorin'
components = ['Build']
creation = <Date 2021-07-12.15:05:02.827>
creator = 'tarun.johar'
dependencies = []
files = []
hgrepos = []
issue_num = 44609
keywords = []
message_count = 2.0
messages = ['397319', '404601']
nosy_count = 3.0
nosy_names = ['petr.viktorin', 'methane', 'tarun.johar']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44609'
versions = ['Python 3.10']

Activity

1. tarunjohar commented on Jul 12, 2021

   

   tarunjoharmannequin

   on Jul 12, 2021

   MannequinAuthor

   More actions

   PEP-384 and PEP-652 define a stable ABI to be used with Python 3.2 and later. On Windows, symbols for the stable ABI are exported from the python3.dll shared library.

   The following functions are present in Python 3.9 but have been removed from Python 3.10b3:

   PyObject_AsCharBuffer()
   PyObject_AsReadBuffer()
   PyObject_AsWriteBuffer()
   PyObject_CheckReadBuffer()

   The justification for the removal of these functions was discussed in this issue:

   https://bugs.python.org/issue41103

   Without these functions, an extension cannot utilize the stable ABI to access the buffer memory of data structures. The buffer protocol is suggested as an alternative, but the buffer functions PyObject_GetBuffer() and PyBuffer_Release() are not present in the stable ABI.

   While these two functions may be added to the stable ABI, removal of the four functions above makes Python 3.10 incompatible with previous versions. It is requested that the four functions be reinstated and maintained as described in PEP-652.
2. tarunjohar

   added

   3.10 (EOL)end of lifeend of life

   buildThe build process and cross-buildThe build process and cross-build

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Jul 12, 2021
3. encukou commented on Oct 21, 2021

   

   encukou

   on Oct 21, 2021

   Member

   More actions

   That removal was reverted. Thanks for the report!

   They are still deprecated, which means they may be removed from future API (and only remain in the stable ABI).
   But I hope that's only considered when the new buffer protocol is available in the stable ABI.
4. encukou

   closed this as completedon Oct 21, 2021
5. encukou

   closed this as completedon Oct 21, 2021
6. ezio-melotti

   transferred this issue fromon Apr 10, 2022

Issue actions