gh-105927: Refactor weakrefobject.c

[vstinner]

• Rename proxy_checkref() to proxy_check_ref().
• proxy_check_ref() now checks the object, not the proxy.
• Most functions take PyObject* instead of PyWeakReference*.
• Remove redundant calls to PyWeakref_GET_OBJECT().

• Issue: C API: Add PyWeakref_GetRef() function #105927

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM64 Windows 3.x has failed when building commit 7f97c8e.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/all/#builders/729/builds/4781) and take a look at the build logs.
4. Check if the failure is related to this commit (7f97c8e) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/all/#builders/729/builds/4781

Failed tests:

• test_concurrent_futures

Summary of the results of the build (if available):

== Tests result: FAILURE then SUCCESS ==

413 tests OK.

10 slowest tests:

• test_math: 6 min 49 sec
• test_multiprocessing_spawn: 4 min 22 sec
• test_peg_generator: 4 min 15 sec
• test_unparse: 2 min 37 sec
• test_tokenize: 2 min 29 sec
• test_tarfile: 2 min 9 sec
• test_capi: 1 min 59 sec
• test_unicodedata: 1 min 56 sec
• test_fstring: 1 min 54 sec
• test_compileall: 1 min 35 sec

33 tests skipped:
test.test_asyncio.test_unix_events test_curses test_dbm_gnu
test_dbm_ndbm test_devpoll test_epoll test_fcntl test_fork1
test_gdb test_grp test_ioctl test_kqueue test_multiprocessing_fork
test_multiprocessing_forkserver test_openpty test_perf_profiler
test_perfmaps test_poll test_posix test_pty test_pwd test_readline
test_resource test_syslog test_threadsignals test_tkinter test_ttk
test_wait3 test_wait4 test_xxlimited test_xxtestfuzz
test_zipfile64 test_zoneinfo

1 re-run test:
test_concurrent_futures

Total duration: 24 min 44 sec

Click to see traceback logs

Traceback (most recent call last):
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 480, in temp_dir
    yield path
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 533, in temp_cwd
    yield cwd_dir
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\libregrtest\main.py", line 758, in main
    self._main(tests, kwargs)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\libregrtest\main.py", line 817, in _main
    sys.exit(0)
SystemExit: 0


Traceback (most recent call last):
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\runpy.py", line 198, in _run_module_as_main
    return _run_code(code, main_globals, None,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\runpy.py", line 88, in _run_code
    exec(code, run_globals)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\__main__.py", line 2, in <module>
    main()
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\libregrtest\main.py", line 822, in main
    Regrtest().main(tests=tests, **kwargs)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\libregrtest\main.py", line 752, in main
    with os_helper.temp_cwd(test_cwd, quiet=True):
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\contextlib.py", line 155, in __exit__
    self.gen.throw(value)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 531, in temp_cwd
    with temp_dir(path=name, quiet=quiet) as temp_path:
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\contextlib.py", line 155, in __exit__
    self.gen.throw(value)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 485, in temp_dir
    rmtree(path)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 442, in rmtree
    _rmtree(path)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 385, in _rmtree
    _waitfor(_rmtree_inner, path, waitall=True)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 330, in _waitfor
    func(pathname)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\os_helper.py", line 382, in _rmtree_inner
    _force_run(fullname, os.rmdir, fullname)
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\__init__.py", line 218, in _force_run
    return func(*args)
           ^^^^^^^^^^^
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'C:\\Workspace\\buildarea\\3.x.linaro-win-arm64\\build\\build\\test_python_1836�\\test_python_worker_3456�'


Traceback (most recent call last):
  File "C:\Workspace\buildarea\3.x.linaro-win-arm64\build\Lib\test\support\__init__.py", line 207, in _force_run
    return func(*args)
           ^^^^^^^^^^^
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'C:\\Workspace\\buildarea\\3.x.linaro-win-arm64\\build\\build\\test_python_1836�\\test_python_worker_3456�'