/usr/share/perl5/LockFile/Manager.pm is in liblockfile-simple-perl 0.208-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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;#
;# @COPYRIGHT@
;#
;# $Log: Manager.pm,v $
;# Revision 0.2 1999/12/07 20:51:05 ram
;# Baseline for 0.2 release.
;#
use strict;
########################################################################
package LockFile::Manager;
#
# A pool of all created locks.
#
my $MANAGER = undef; # The main manager
#
# ->make
#
# Creates a new LockFile::Manager to hold the locks.
#
# Attributes:
#
# pool hash of LockFile::Lock objects
# wfunc warning function to be called
# efunc error function to be called
#
sub make {
my $self = bless {}, shift;
my ($wfunc, $efunc) = @_;
$self->{'pool'} = {};
$self->{'wfunc'} = $wfunc;
$self->{'efunc'} = $efunc;
return $self;
}
#
# Attribute access
#
sub pool { $_[0]->{'pool'} }
sub wfunc { $_[0]->{'wfunc'} }
sub efunc { $_[0]->{'efunc'} }
#
# ->manager -- "once" function
#
# Returns the main manager.
#
sub manager {
my ($class, $wfunc, $efunc) = @_;
return $MANAGER || ($MANAGER = $class->make($wfunc, $efunc));
}
#
# ->remember
#
# Remember created locks.
#
sub remember {
my $self = shift;
my ($lock) = @_; # A LockFile::Lock object
my $pool = $self->pool;
if (exists $pool->{$lock}) {
&{$self->efunc}("lock $lock already remembered");
return;
}
$pool->{$lock} = $lock;
}
#
# ->forget
#
# Forget about a lock.
#
sub forget {
my $self = shift;
my ($lock) = @_; # A LockFile::Lock object
my $pool = $self->pool;
unless (exists $pool->{$lock}) {
&{$self->efunc}("lock $lock not remembered yet");
return;
}
delete $pool->{$lock};
}
#
# ->release_all
#
# Release all the locks.
#
sub release_all {
my $self = shift;
my $pool = $self->pool;
my $locks = scalar keys %$pool;
return unless $locks;
my $s = $locks == 1 ? '' : 's';
&{$self->wfunc}("releasing $locks pending lock$s...");
foreach my $lock (values %$pool) {
$lock->release;
}
}
sub END { $MANAGER->release_all if defined $MANAGER }
1;
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