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1 | #!/usr/bin/perl |
2 | |
3 | package Devel::GlobalDestruction; |
4 | |
5 | use strict; |
6 | use warnings; |
7 | |
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8 | use XSLoader; |
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9 | |
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10 | our $VERSION = '0.02'; |
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11 | |
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12 | XSLoader::load(__PACKAGE__, $VERSION); |
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13 | |
14 | use Sub::Exporter -setup => { |
15 | exports => [ qw(in_global_destruction) ], |
16 | groups => { default => [ -all ] }, |
17 | }; |
18 | |
19 | __PACKAGE__ |
20 | |
21 | __END__ |
22 | |
23 | =pod |
24 | |
25 | =head1 NAME |
26 | |
27 | Devel::GlobalDestruction - Expose PL_dirty, the flag which marks global |
28 | destruction. |
29 | |
30 | =head1 SYNOPSIS |
31 | |
32 | package Foo; |
33 | use Devel::GlobalDestruction; |
34 | |
35 | use namespace::clean; # to avoid having an "in_global_destruction" method |
36 | |
37 | sub DESTROY { |
38 | return if in_global_destruction; |
39 | |
40 | do_something_a_little_tricky(); |
41 | } |
42 | |
43 | =head1 DESCRIPTION |
44 | |
45 | Perl's global destruction is a little tricky to deal with WRT finalizers |
46 | because it's not ordered and objects can sometimes disappear. |
47 | |
48 | Writing defensive destructors is hard and annoying, and usually if global |
49 | destruction is happenning you only need the destructors that free up non |
50 | process local resources to actually execute. |
51 | |
52 | For these constructors you can avoid the mess by simply bailing out if global |
53 | destruction is in effect. |
54 | |
55 | =head1 EXPORTS |
56 | |
57 | This module uses L<Sub::Exporter> so the exports may be renamed, aliased, etc. |
58 | |
59 | =over 4 |
60 | |
61 | =item in_global_destruction |
62 | |
63 | Returns the current value of C<PL_dirty>. |
64 | |
65 | =back |
66 | |
67 | =head1 VERSION CONTROL |
68 | |
69 | This module is maintained using Darcs. You can get the latest version from |
70 | L<http://nothingmuch.woobling.org/code>, and use C<darcs send> to commit |
71 | changes. |
72 | |
73 | =head1 AUTHOR |
74 | |
75 | Yuval Kogman E<lt>nothingmuch@woobling.orgE<gt> |
76 | |
77 | =head1 COPYRIGHT |
78 | |
79 | Copyright (c) 2008 Yuval Kogman. All rights reserved |
80 | This program is free software; you can redistribute |
81 | it and/or modify it under the same terms as Perl itself. |
82 | |
83 | =cut |
84 | |
85 | |