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Man Pages


Manual Reference Pages  -  DEVEL::GLOBALDESTRUCTION (3)

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NAME

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

CONTENTS

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@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.



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perl v5.20.3 DEVEL::GLOBALDESTRUCTION (3) 2014-08-16

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