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package Perl::Critic::Policy::Freenode::Threads; |
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273243
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use strict; |
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use warnings; |
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31
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use Perl::Critic::Utils qw(:severities :classification :ppi); |
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use parent 'Perl::Critic::Policy'; |
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our $VERSION = '0.030'; |
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use constant DESC => 'Using interpreter threads'; |
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use constant EXPL => 'Interpreter threads are discouraged, they are not lightweight and fast as other threads may be. Try an event loop, forks.pm, or Parallel::Prefork.'; |
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sub supported_parameters { () } |
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sub default_severity { $SEVERITY_MEDIUM } |
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0
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sub default_themes { 'freenode' } |
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2
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8229
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sub applies_to { 'PPI::Statement::Include' } |
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sub violates { |
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my ($self, $elem) = @_; |
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return $self->violation(DESC, EXPL, $elem) if $elem->pragma eq 'threads'; |
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0
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return (); |
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} |
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1; |
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=head1 NAME |
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Perl::Critic::Policy::Freenode::Threads - Interpreter-based threads are |
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officially discouraged |
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32
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=head1 DESCRIPTION |
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Perl interpreter L<threads> are officially discouraged. They were created to |
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emulate C<fork()> in Windows environments, and are not fast or lightweight as |
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one may expect. Non-blocking code or I/O can be easily parallelized by using an |
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event loop such as L<POE>, L<IO::Async>, or L<Mojo::IOLoop>. Blocking code is |
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usually better parallelized by forking, which on Unix-like systems is fast and |
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efficient. Modules such as L<forks> and L<Parallel::Prefork> can make forking |
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easier to work with, as well as forking modules for event loops such as |
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L<POE::Wheel::Run>, L<IO::Async::Process>, or L<Mojo::IOLoop/"subprocess">. |
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43
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=head1 AFFILIATION |
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This policy is part of L<Perl::Critic::Freenode>. |
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47
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=head1 CONFIGURATION |
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49
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This policy is not configurable except for the standard options. |
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51
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=head1 AUTHOR |
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52
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53
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Dan Book, C<dbook@cpan.org> |
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55
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=head1 COPYRIGHT AND LICENSE |
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56
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57
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Copyright 2015, Dan Book. |
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58
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59
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This library is free software; you may redistribute it and/or modify it under |
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60
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the terms of the Artistic License version 2.0. |
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61
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62
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=head1 SEE ALSO |
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63
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64
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L<Perl::Critic> |