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[3.12] gh-112826: Fix the threading Module When _thread is Missing _is_main_interpreter()#112850
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Yhg1s merged 7 commits intopython:3.12fromericsnowcurrently:backport-3.12-fix-112826-missing-_thread-_is_main_interpreterDec 7, 2023
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Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
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Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-authored-by: T. Wouters <thomas@python.org>
ericsnowcurrently added a commit to ericsnowcurrently/cpython that referenced this pull requestDec 7, 2023
Yhg1s approved these changesDec 7, 2023
ericsnowcurrently added a commit that referenced this pull requestDec 7, 2023
gh-112853)As ofgh-112661, the threading module expects the _thread module to have a _is_main_interpreter(), which is used in the internal threading._shutdown(). This change causes a problem for anyone that replaces the _thread module with a custom one (only if they don't provide _is_main_interpreter()). They need to be sure to add it for 3.13+, thus this PR is adding a note in "What's New".This also forward-ports the "What's New" entry from 3.12 (gh-112850). Note that we do not also forward-port the fix in that PR. The fix is there only due to a regression from 3.12.0. There is no regression in 3.13+.
aisk pushed a commit to aisk/cpython that referenced this pull requestFeb 11, 2024
…rpreter (pythongh-112853)As ofpythongh-112661, the threading module expects the _thread module to have a _is_main_interpreter(), which is used in the internal threading._shutdown(). This change causes a problem for anyone that replaces the _thread module with a custom one (only if they don't provide _is_main_interpreter()). They need to be sure to add it for 3.13+, thus this PR is adding a note in "What's New".This also forward-ports the "What's New" entry from 3.12 (pythongh-112850). Note that we do not also forward-port the fix in that PR. The fix is there only due to a regression from 3.12.0. There is no regression in 3.13+.
Glyphack pushed a commit to Glyphack/cpython that referenced this pull requestSep 2, 2024
…rpreter (pythongh-112853)As ofpythongh-112661, the threading module expects the _thread module to have a _is_main_interpreter(), which is used in the internal threading._shutdown(). This change causes a problem for anyone that replaces the _thread module with a custom one (only if they don't provide _is_main_interpreter()). They need to be sure to add it for 3.13+, thus this PR is adding a note in "What's New".This also forward-ports the "What's New" entry from 3.12 (pythongh-112850). Note that we do not also forward-port the fix in that PR. The fix is there only due to a regression from 3.12.0. There is no regression in 3.13+.
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_thread._is_main_interpreter()was added (and aliased asthreading._is_main_interpreter()) after the 3.12.0 release, ingh-110707 (a backport ofgh-112661). However, that change did not accommodate cases where users replace the_threadmodule with a custom version that doesn't have_is_main_interpreter()defined (e.g. gevent).This change fixes that by falling back to a dummy
_is_main_interpreter()that always says "yes". That case is unlikely and the consequences of saying a subinterpreter is the main interpreter, relative to `threading._shutdown(), are almost zero.(We are fixing this in 3.12 only because it is a regression from the already released 3.12.0. In 3.13 (main) we will only have the note in "What's New".)
📚 Documentation preview 📚:https://cpython-previews--112850.org.readthedocs.build/