phpman > perldoc > Devel::GlobalDestruction(3pm)

NAME
    Devel::GlobalDestruction - Provides function returning the equivalent of "${^GLOBAL_PHASE} eq
    'DESTRUCT'" for older perls.

SYNOPSIS
        package Foo;
        use Devel::GlobalDestruction;

        use namespace::clean; # to avoid having an "in_global_destruction" method

        sub DESTROY {
            return if in_global_destruction;

            do_something_a_little_tricky();
        }

DESCRIPTION
    Perl's global destruction is a little tricky to deal with WRT finalizers because it's not
    ordered and objects can sometimes disappear.

    Writing defensive destructors is hard and annoying, and usually if global destruction is
    happening you only need the destructors that free up non process local resources to actually
    execute.

    For these constructors you can avoid the mess by simply bailing out if global destruction is in
    effect.

EXPORTS
    This module uses Sub::Exporter::Progressive so the exports may be renamed, aliased, etc. if
    Sub::Exporter is present.

    in_global_destruction
        Returns true if the interpreter is in global destruction. In perl 5.14+, this returns
        "${^GLOBAL_PHASE} eq 'DESTRUCT'", and on earlier perls, detects it using the value of
        "PL_main_cv" or "PL_dirty".

AUTHORS
    Yuval Kogman <nothingmuch AT woobling.org>

    Florian Ragwitz <rafl AT debian.org>

    Jesse Luehrs <doy AT tozt.net>

    Peter Rabbitson <ribasushi AT cpan.org>

    Arthur Axel 'fREW' Schmidt <frioux AT gmail.com>

    Elizabeth Mattijsen <liz AT dijkmat.nl>

    Greham Knop <haarg AT haarg.org>

COPYRIGHT
        Copyright (c) 2008 Yuval Kogman. All rights reserved
        This program is free software; you can redistribute
        it and/or modify it under the same terms as Perl itself.