Devel::GlobalDestruction (3)

Leading comments

Automatically generated by Pod::Man 4.07 (Pod::Simple 3.32)

Standard preamble:
========================================================================

(The comments found at the beginning of the groff file "man3/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 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@woobling.org>

Florian Ragwitz <rafl@debian.org>

Jesse Luehrs <doy@tozt.net>

Peter Rabbitson <ribasushi@cpan.org>

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

Elizabeth Mattijsen <liz@dijkmat.nl>

Greham Knop <haarg@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.