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gh-94242: Clarify comments for _MAX_WINDOWS_WORKERS in concurrent.futures.process #135537

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gh-94242: Clarify comments for _MAX_WINDOWS_WORKERS in concurrent.futures.process #135537

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5 changes: 3 additions & 2 deletions Lib/concurrent/futures/process.py
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Original file line number Diff line number Diff line change
Expand Up @@ -119,10 +119,11 @@ def _python_exit():


# On Windows, WaitForMultipleObjects is used to wait for processes to finish.
# It can wait on, at most, 63 objects. There is an overhead of two objects:
# It can wait on, at most, 64 objects. There is an overhead of three objects:
# - the result queue reader
# - the thread wakeup reader
_MAX_WINDOWS_WORKERS = 63 - 2
# - the SIGINT handler
_MAX_WINDOWS_WORKERS = 64 - 3

# Hack to embed stringification of remote traceback in local traceback

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