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[3.11] fixes gh-96078: os.sched_yield release the GIL while calling sched_yield(2). (gh-97965) #98014

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Merged
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Oct 7, 2022
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[3.11] fixes gh-96078: os.sched_yield release the GIL while calling sched_yield(2). (gh-97965) #98014

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fixes gh-96078: os.sched_yield release the GIL while calling sched_yi… 
…eld(2). (gh-97965)

(cherry picked from commit b9d2e81)

Co-authored-by: Dong-hee Na <[email protected]>
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@corona10 @miss-islington
corona10 authored and miss-islington committed Oct 7, 2022
commit 920e025c8b515527d16eba3ffd0568bacfe7212e
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Core and Builtins/2022-10-06-15-45-57.gh-issue-96078.fS-6mU.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
:func:`os.sched_yield` now release the GIL while calling sched_yield(2).
Patch by Dong-hee Na.
7 changes: 6 additions & 1 deletion Modules/posixmodule.c
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Expand Up @@ -7096,8 +7096,13 @@ static PyObject *
os_sched_yield_impl(PyObject *module)
/*[clinic end generated code: output=902323500f222cac input=e54d6f98189391d4]*/
{
if (sched_yield())
int result;
Py_BEGIN_ALLOW_THREADS
result = sched_yield();
Py_END_ALLOW_THREADS
if (result < 0) {
return posix_error();
}
Py_RETURN_NONE;
}

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