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gh-119247: Add macros to use PySequence_Fast safely in free-threaded build #119315

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Merged
colesbury merged 9 commits into from
May 22, 2024
Merged

gh-119247: Add macros to use PySequence_Fast safely in free-threaded build #119315

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b22f6e2
Initial work on critical sections for fast sequences while developing…
MojoVampire May 21, 2024
2b4fe19
Test for efficacy of fast sequence locking macro on str.join, both te…
MojoVampire May 21, 2024
536defc
Blurb for change
MojoVampire May 21, 2024
0475c8e
Update Include/internal/pycore_critical_section.h
MojoVampire May 21, 2024
1f3cec0
Tweak comments per review
MojoVampire May 21, 2024
707852d
Use braced if per review
MojoVampire May 21, 2024
66f0e6c
Per review, refactor extend test to extend multiple times, and reduce…
MojoVampire May 21, 2024
515ee56
Remove listobject.h include per review (all users of pycore_critical_…
MojoVampire May 21, 2024
254a5a5
Reduce readers in test_racing_join_replace to 10, use Event to synchr…
MojoVampire May 22, 2024
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Reduce readers in test_racing_join_replace to 10, use Event to synchr… 
…onize, and perform multiple joins per loop to increase chance of repro without synchronization
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@MojoVampire
MojoVampire committed May 22, 2024
commit 254a5a51721e6ae55f85c5c4f412f7b4d2190783
13 changes: 7 additions & 6 deletions Lib/test/test_free_threading/test_str.py
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Original file line number Diff line number Diff line change
Expand Up @@ -42,20 +42,21 @@ def test_racing_join_replace(self):
'''
l = [*'abcdefg']
MAX_ORDINAL = 1_000
READERS = 20
READERS = 10
done_event = Event()

def writer_func():
for i, c in zip(cycle(range(len(l))),
map(chr, range(128, MAX_ORDINAL))):
l[i] = c
del l[:] # Empty list to tell readers to exit
done_event.set()

def reader_func():
while True:
empty = not l
while not done_event.is_set():
''.join(l)
''.join(l)
''.join(l)
''.join(l)
if empty:
break

writer = Thread(target=writer_func)
readers = []
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