gh-111962: Make dtoa thread-safe in --disable-gil builds.
#112049
Merged
Commits on Nov 20, 2023
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pythongh-111962: Make dtoa thread-safe in
--disable-gilbuilds.This avoids using the Bigint free-list in `--disable-gil` builds and pre-computes the needed powers of 5 during interpreter initialization.
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Fix size of cached powers of 5 array.
We need the powers of 5 up to 5**512 because we only jump straight to underflow when the exponent is less than -512 (or larger than 308).
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