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# -*- cperl -*-
#
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
#
# Copyright (C) 2002-2014 Jens Thoms Toerring <jt@toerring.de>
# Base class for the three modules for file locking using fcntl(2)
package File::FcntlLock::Core;
use 5.006;
use strict;
use warnings;
use POSIX;
use Carp;
use base qw( File::FcntlLock::Errors Exporter );
our $VERSION = '0.22';
# Items to export into callers namespace by default.
our @EXPORT = qw( F_GETLK F_SETLK F_SETLKW
F_RDLCK F_WRLCK F_UNLCK
SEEK_SET SEEK_CUR SEEK_END );
###########################################################
#
# Make our exports exportable by child classes
sub import
{
File::FcntlLock::Core->export_to_level( 1, @_ );
}
###########################################################
# Method for creating the object
sub new {
my $inv = shift;
my $pkg = ref( $inv ) || $inv;
my $self = { l_type => F_RDLCK,
l_whence => SEEK_SET,
l_start => 0,
l_len => 0,
l_pid => 0,
errno => undef,
error_message => undef };
if ( @_ % 2 ) {
carp "Missing value in key-value initializer list " .
"in call of new method";
return;
}
while ( @_ ) {
my $key = shift;
no strict 'refs';
unless ( defined &$key ) {
carp "Flock structure has no '$key' member " .
"in call of new method";
return;
}
&$key( $self, shift );
use strict 'refs';
}
bless $self, $pkg;
}
###########################################################
# Method for setting or querying the 'l_type' property
sub l_type {
my $self = shift;
if ( @_ ) {
my $l_type = shift;
unless ( $l_type == F_RDLCK
or $l_type == F_WRLCK
or $l_type == F_UNLCK ) {
carp "Invalid argument in call of l_type method";
return;
}
$self->{ l_type } = $l_type;
}
return $self->{ l_type };
}
###########################################################
# Method for setting or querying the 'l_whence' property
sub l_whence {
my $self = shift;
if ( @_ ) {
my $l_whence = shift;
unless ( $l_whence == SEEK_SET
or $l_whence == SEEK_CUR
or $l_whence == SEEK_END ) {
carp "Invalid argument in call of l_whence method";
return;
}
$self->{ l_whence } = $l_whence;
}
return $self->{ l_whence };
}
###########################################################
# Method to set or query of the 'l_start' property
sub l_start {
my $self = shift;
$self->{ l_start } = shift if @_;
return $self->{ l_start };
}
###########################################################
# Method to set or query the 'l_len' property
sub l_len {
my $self = shift;
$self->{ l_len } = shift if @_;
return $self->{ l_len };
}
###########################################################
# Method to query the 'l_pid' property
sub l_pid {
return shift->{ l_pid };
}
1;
# Local variables:
# tab-width: 4
# indent-tabs-mode: nil
# End:
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