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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:

Filemanager

Name Type Size Permission Actions
Core.pm File 3.29 KB 0644
Errors.pm File 4.03 KB 0644
Inline.pm File 7.32 KB 0644
Inline.pod File 10.47 KB 0644
Pure.pm File 2.21 KB 0644
Pure.pod File 10.47 KB 0644
XS.pm File 494 B 0644
XS.pod File 10.47 KB 0644