-------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2020-d31ca621ea 2020-05-03 04:53:06.676564 --------------------------------------------------------------------------------
Name : perl-B-COW Product : Fedora 31 Version : 0.004 Release : 2.fc31 URL : https://metacpan.org/release/B-COW Summary : Additional B helpers to check Copy On Write status Description : B::COW provides some na��ve additional B helpers to check the Copy On Write (COW) status of one SvPV (a Perl string variable).
A COWed SvPV is sharing its string (the PV) with other SvPVs. It's a (kind of) Read Only C string, which would be Copied On Write (COW). More than one SV can share the same PV, but when one PV needs to alter it, it would perform a copy of it, decreasing the COWREFCNT counter. One SV can then drop the COW flag when it's the only one holding a pointer to the PV. The COWREFCNT is stored at the end of the PV, after the null byte terminating the string. That value is limited to 255: when we reach 255, a new PV would be created.
-------------------------------------------------------------------------------- Update Information:
This is the first Fedora build of perl-B-COW, a module for determining the copy- on-write status of a variable. -------------------------------------------------------------------------------- ChangeLog:
-------------------------------------------------------------------------------- References:
[ 1 ] Bug #1826270 - Review Request: perl-B-COW - Additional B helpers to check Copy On Write status https://bugzilla.redhat.com/show_bug.cgi?id=1826270 --------------------------------------------------------------------------------
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2020-d31ca621ea' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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