mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-13 10:25:01 +00:00
131 lines
3.7 KiB
Perl
131 lines
3.7 KiB
Perl
#
|
|
# ***** BEGIN LICENSE BLOCK *****
|
|
# Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
#
|
|
# The contents of this file are subject to the Mozilla Public License Version
|
|
# 1.1 (the "License"); you may not use this file except in compliance with
|
|
# the License. You may obtain a copy of the License at
|
|
# http://www.mozilla.org/MPL/
|
|
#
|
|
# Software distributed under the License is distributed on an "AS IS" basis,
|
|
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
# for the specific language governing rights and limitations under the
|
|
# License.
|
|
#
|
|
# The Original Code is mozilla.org code.
|
|
#
|
|
# The Initial Developer of the Original Code is
|
|
# Netscape Communications Corporation.
|
|
# Portions created by the Initial Developer are Copyright (C) 2001
|
|
# the Initial Developer. All Rights Reserved.
|
|
#
|
|
# Contributor(s):
|
|
# Christopher Seawood <cls@seawood.org>
|
|
#
|
|
# Alternatively, the contents of this file may be used under the terms of
|
|
# either of the GNU General Public License Version 2 or later (the "GPL"),
|
|
# or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
# in which case the provisions of the GPL or the LGPL are applicable instead
|
|
# of those above. If you wish to allow use of your version of this file only
|
|
# under the terms of either the GPL or the LGPL, and not to allow others to
|
|
# use your version of this file under the terms of the MPL, indicate your
|
|
# decision by deleting the provisions above and replace them with the notice
|
|
# and other provisions required by the GPL or the LGPL. If you do not delete
|
|
# the provisions above, a recipient may use your version of this file under
|
|
# the terms of any one of the MPL, the GPL or the LGPL.
|
|
#
|
|
# ***** END LICENSE BLOCK *****
|
|
|
|
package mozLock;
|
|
|
|
use strict;
|
|
use IO::File;
|
|
use Cwd;
|
|
|
|
BEGIN {
|
|
use Exporter ();
|
|
use vars qw ($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
|
|
|
|
$VERSION = 1.00;
|
|
@ISA = qw(Exporter);
|
|
@EXPORT = qw(&mozLock &mozUnlock);
|
|
%EXPORT_TAGS = ( );
|
|
@EXPORT_OK = qw();
|
|
}
|
|
|
|
my $lockcounter = 0;
|
|
my $locklimit = 100;
|
|
my $locksleep = 0.1;
|
|
my %lockhash;
|
|
|
|
# File::Spec->rel2abs appears to be broken in ActiveState Perl 5.22
|
|
# so roll our own
|
|
sub priv_abspath($) {
|
|
my ($file) = @_;
|
|
my ($dir, $out);
|
|
my (@inlist, @outlist);
|
|
|
|
# Force files to have unix paths.
|
|
$file =~ s/\\/\//g;
|
|
|
|
# Check if file is already absolute
|
|
if ($file =~ m/^\// || substr($file, 1, 1) eq ':') {
|
|
return $file;
|
|
}
|
|
$out = cwd . "/$file";
|
|
|
|
# Do what File::Spec->canonpath should do
|
|
@inlist = split(/\//, $out);
|
|
foreach $dir (@inlist) {
|
|
if ($dir eq '..') {
|
|
pop @outlist;
|
|
} else {
|
|
push @outlist, $dir;
|
|
}
|
|
}
|
|
$out = join '/',@outlist;
|
|
return $out;
|
|
}
|
|
|
|
sub mozLock($) {
|
|
my ($inlockfile) = @_;
|
|
my ($lockhandle, $lockfile);
|
|
$lockfile = priv_abspath($inlockfile);
|
|
#print "LOCK: $lockfile\n";
|
|
$lockcounter = 0;
|
|
$lockhandle = new IO::File || die "Could not create filehandle for $lockfile: $!\n";
|
|
while ($lockcounter < $locklimit) {
|
|
if (! -e $lockfile) {
|
|
open($lockhandle, ">$lockfile") || die "$lockfile: $!\n";
|
|
$lockhash{$lockfile} = $lockhandle;
|
|
last;
|
|
}
|
|
$lockcounter++;
|
|
select(undef,undef,undef, $locksleep);
|
|
}
|
|
if ($lockcounter >= $locklimit) {
|
|
undef $lockhandle;
|
|
die "$0: Could not get lockfile $lockfile.\nRemove $lockfile to clear up\n";
|
|
}
|
|
}
|
|
|
|
sub mozUnlock($) {
|
|
my ($inlockfile) = @_;
|
|
my ($lockhandle, $lockfile);
|
|
#$lockfile = File::Spec->rel2abs($inlockfile);
|
|
$lockfile = priv_abspath($inlockfile);
|
|
#print "UNLOCK: $lockfile\n";
|
|
$lockhandle = $lockhash{$lockfile};
|
|
if (defined($lockhandle)) {
|
|
close($lockhandle);
|
|
$lockhash{$lockfile} = undef;
|
|
unlink($lockfile);
|
|
} else {
|
|
print "WARNING: $0: lockhandle for $lockfile not defined. Lock may not be removed.\n";
|
|
}
|
|
}
|
|
|
|
END {};
|
|
|
|
1;
|