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bpo-45522: Allow to disable freelists on build time (GH-29056)

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Freelists for object structs can now be disabled. A new ``configure``
option ``--without-freelists`` can be used to disable all freelists
except empty tuple singleton. Internal Py*_MAXFREELIST macros can now
be defined as 0 without causing compiler warnings and segfaults.

Signed-off-by: Christian Heimes <christian@python.org>
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Christian Heimes 2021-10-21 16:12:20 +03:00 • committed by GitHub
parent 5a14f71fe8
commit 9942f42a93
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15 changed files with 218 additions and 35 deletions
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17
configure.ac
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@ -3616,6 +3616,23 @@ then
fi
AC_MSG_RESULT($with_pymalloc)
# Check whether objects such as float, tuple and dict are using
# freelists to optimization memory allocation.
AC_MSG_CHECKING(for --with-freelists)
AC_ARG_WITH(freelists,
AS_HELP_STRING([--with-freelists], [enable object freelists (default is yes)]))
if test -z "$with_freelists"
then
with_freelists="yes"
fi
if test "$with_freelists" != "no"
then
AC_DEFINE(WITH_FREELISTS, 1,
[Define if you want to compile in object freelists optimization])
fi
AC_MSG_RESULT($with_freelists)
# Check for --with-c-locale-coercion
AC_MSG_CHECKING(for --with-c-locale-coercion)
AC_ARG_WITH(c-locale-coercion,