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gh-159558: Avoid un-needed nested locks in set operations - #159559

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johng wants to merge 10 commits into

python:mainfrom

johng:ft-cs-reentry

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gh-159558: Avoid un-needed nested locks in set operations#159559
johng wants to merge 10 commits into
python:mainfrom
johng:ft-cs-reentry

Commits on Oct 16, 2026
- Avoid re-locking both sets in set.issuperset() on the free-threaded build
  johng
  committed
  5820ba8
- Avoid re-locking the set in set.discard() and set.remove() on the free-threaded build
  johng
  committed
  0a4c788
- ctypes: do not re-lock the object in the Simple.value setter on the free-threaded build
  johng
  committed
  5ca398f
- ctypes: do not re-lock the pointer or its target in the Pointer.contents setter
  johng
  committed
  576731e
- ctypes: do not re-lock the destination in PyCData_set()
  johng
  committed
  ead0976
- News entry
  johng
  committed
  dc0fe28
- gh-159558: Add NEWS entries for the set and ctypes critical-section re-entry fixes
  johng
  committed
  180a455
- Move the ctypes changes to a separate PR
  johng
  committed
  b5102fc
- gh-159558: Combine the NEWS entries
  johng
  committed
  f13c0ee
- gh-159558: Drop a redundant comment
  johng
  committed
  f9b1718