[issue44609] Buffer support in the stable ABI

[Petr Viktorin]

Petr Viktorin  added the comment:

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.

--
nosy: +petr.viktorin
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue44609] Buffer support in the stable ABI

[Inada Naoki]

Change by Inada Naoki :


--
nosy: +methane

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[issue44609] Buffer support in the stable ABI

[Tarun Johar]

New submission from Tarun Johar :

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.

--
components: Build
messages: 397319
nosy: tarun.johar
priority: normal
severity: normal
status: open
title: Buffer support in the stable ABI
type: behavior
versions: Python 3.10

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