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package Plucene::Utils; |
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=head1 NAME |
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Plucene::Utils - Utility class for Plucene |
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=head1 SYNOPSIS |
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use Plucene::Utils; |
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do_locked($sub, $lock); |
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=head1 DESCRIPTION |
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Utilities to help with Plucene. |
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=head1 METHODS |
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=cut |
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use strict; |
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use warnings; |
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use Carp; |
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6192
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use Fcntl qw(O_EXCL O_CREAT O_WRONLY); |
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use base 'Exporter'; |
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5250
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our @EXPORT = qw( do_locked ); |
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=head2 do_locked |
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do_locked($sub, $lock); |
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=cut |
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sub do_locked (&$) { |
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my ($sub, $lock) = @_; |
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local *FH; |
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for (1 .. 5) { |
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4966
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sysopen FH, $lock, O_EXCL | O_CREAT | O_WRONLY |
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and goto got_lock; |
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sleep 1; |
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warn "I had to sleep to get a lock on $lock"; |
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} |
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carp "Couldn't get lock $lock: $!"; |
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got_lock: |
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$sub->(); |
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732
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close *FH; |
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5294
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unlink $lock; |
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} |
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1; |