We replace _PyRuntime.tstate_current with a thread-local variable. As part of this change, we add a _Py_thread_local macro in pyport.h (only for the core runtime) to smooth out the compiler differences. The main motivation here is in support of a per-interpreter GIL, but this change also provides some performance improvement opportunities.
Note that we do not provide a fallback to the thread-local, either falling back to the old tstate_current or to thread-specific storage (PyThread_tss_*()). If that proves problematic then we can circle back. I consider it unlikely, but will run the buildbots to double-check.
Also note that this does not change any of the code related to the GILState API, where it uses a thread state stored in thread-specific storage. I suspect we can combine that with _Py_tss_tstate (from here). However, that can be addressed separately and is not urgent (nor critical).
(While this change was mostly done independently, I did take some inspiration from earlier (~2020) work by @markshannon (main...markshannon:threadstate_in_tls) and @vstinner (#23976).)
This is the implementation of PEP683
Motivation:
The PR introduces the ability to immortalize instances in CPython which bypasses reference counting. Tagging objects as immortal allows up to skip certain operations when we know that the object will be around for the entire execution of the runtime.
Note that this by itself will bring a performance regression to the runtime due to the extra reference count checks. However, this brings the ability of having truly immutable objects that are useful in other contexts such as immutable data sharing between sub-interpreters.
* Doc: Fix broken links reported by linkcheck
* Apply suggestions from code review
- Remove extra diff line in faq/library.rst (merwok)
- Use HTTPS to link Unicode 15.0.0 to solve a redirect (hugovk)
- Use wayback machine link for openssl 1.1.0 instead of linking 1.1.1, "as this text mentions a feature from 1.1.0" (hugovk)
Co-authored-by: Éric <merwok@netwok.org>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
* Doc: Make mark-up code as literal
* Doc: Alphabetize items in linkcheck_ignore
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
* Doc: Improve comment in sphinx conf
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
---------
Co-authored-by: Éric <merwok@netwok.org>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
* bugfix: let the HTTP- and HTTPSHandlers respect the value of http.client.HTTPConnection.debuglevel
* add tests
* add news
* ReSTify NEWS and reword a bit.
* Address Review Comments.
* Use mock.patch.object instead of settting the module level value.
* Used test values to assert the debuglevel.
---------
Co-authored-by: Gregory P. Smith <greg@krypto.org>
Co-authored-by: Senthil Kumaran <senthil@python.org>
For example:
class Book(StrEnum):
title = auto()
author = auto()
desc = auto()
Book.author.desc is Book.desc
but
Book.author.title() == 'Author'
is commonly expected. Using upper-case member names avoids this confusion and possible performance impacts.
Co-authored-by: samypr100 <3933065+samypr100@users.noreply.github.com>
Remove the bundled setuptools wheel from ensurepip, and stop installing setuptools in environments created by venv.
Co-Authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-authored-by: C.A.M. Gerlach <CAM.Gerlach@Gerlach.CAM>
Co-authored-by: Oleg Iarygin <oleg@arhadthedev.net>
We no longer add a root to device paths such as `//./PhysicalDrive0`,
`//?/BootPartition` and `//./c:` while normalizing. We also avoid adding a
root to incomplete UNC share paths, like `//`, `//a` and `//a/`.
Co-authored-by: Eryk Sun <eryksun@gmail.com>
Fixes unittest.mock.patch not enforcing function signatures for methods
decorated with @classmethod or @staticmethod when patch is called with
autospec=True.
* The majority of the monitoring code is in instrumentation.c
* The new instrumentation bytecodes are in bytecodes.c
* legacy_tracing.c adapts the new API to the old sys.setrace and sys.setprofile APIs
* Made all the command part of the docstring match the official documentation
* Always have a space between the command and the description in docstring
* Added a helper function to format the help message
Before:
```
(Pdb) h a
a(rgs)
Print the argument list of the current function.
(Pdb) h commands
commands [bpnumber]
(com) ...
(com) end
(Pdb)
...
(Pdb) h interact
interact
Start an interactive interpreter whose global namespace
contains all the (global and local) names found in the current scope.
```
After
```
(Pdb) h a
Usage: a(rgs)
Print the argument list of the current function.
(Pdb) h commands
Usage: (Pdb) commands [bpnumber]
(com) ...
(com) end
(Pdb)
...
(Pdb) h interact
Usage: interact
Start an interactive interpreter whose global namespace
contains all the (global and local) names found in the current scope.
```
Automerge-Triggered-By: GH:brandtbucher
Improve performance of path construction by skipping the addition of the path anchor (`drive + root`) to the internal `_parts` list. Rename this attribute to `_tail` for clarity.
Nikita Sobolev
Oleg Iarygin
Eric Snow
Brett Simmers
Petr Viktorin
Tian Gao
Christopher Chavez
Senthil Kumaran
James Hilton-Balfe
Dong-hee Na
Adrian Garcia Badaracco
Eddie Elizondo
Eric Wieser
Rafael Fontenelle
Paul Moore
Jason R. Coombs
Wheeler Law
Alexander Belopolsky
Pablo Galindo Salgado
Irit Katriel
Ethan Furman
Pradyun Gedam
AN Long
chgnrdv
Barney Gale
Zachary Ware
Mark Shannon
Tomas R
Ali-Akber Saifee
Skip Montanaro
Stanislav Syekirin
Erlend E. Aasland
Bar Harel
David Ellis
raylu