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*** This is alpha software -- use at your own risks ***
Name DSLI Description Info
LockFile:: Application-level locking facilities
::Simple adpr Simple file locking mechanism RAM
::Lock:: —- Lock handles created by LockFile::* schemes RAM
::Manager —- Records locks created by LockFile::* RAM
SYNOPSIS
#
# The simple way
#
use LockFile::Simple qw(lock unlock);
lock("file") || die "Can't lock file\n";
open(FILE, ">>file") || die "Can't append to file: $!\n";
....
close FILE;
unlock("file");
#
# The more elaborated way
#
use LockFile::Simple;
my $scheme = LockFile::Simple->make(
-autoclean => 1,
-format => "%f.lck");
$scheme->lock($0, "/var/run/%F.%p") || die "already running";
my $lock = $sheme->lock("file");
open(FILE, ">>file") || die "Can't append to file: $!\n";
....
close FILE;
$lock->release;
DESCRIPTION
The LockFile::Simple extension provides simple file locking, of
the advisory kind, i.e. it requires cooperation between applications
wishing to lock the same files.
It is meant to be used in quick-and-dirty scripts or more elaborated
programs that want a simple locking scheme, yet with a reasonable
level of configuration.
This code comes from the mailagent-3.0 package and retains most
of its configuration abilities.
I do not intend to leave this simple scheme as-is forever. The code is
designed to be extended to offer other locking schemes, such as
MTA locking–usually a combination of this simple scheme and flock().
Despite being flagged as simple and not bullet proof all over the
place, locking is good enough in practice for simple applications
wishing to protect against concurrent actions.
Name DSLI Description Info
LockFile:: Application-level locking facilities ::Simple adpr Simple file locking mechanism RAM ::Lock:: —- Lock handles created by LockFile::* schemes RAM ::Manager —- Records locks created by LockFile::* RAM
SYNOPSIS
DESCRIPTION
The LockFile::Simple extension provides simple file locking, of the advisory kind, i.e. it requires cooperation between applications wishing to lock the same files.
It is meant to be used in quick-and-dirty scripts or more elaborated programs that want a simple locking scheme, yet with a reasonable level of configuration.
This code comes from the mailagent-3.0 package and retains most of its configuration abilities.
I do not intend to leave this simple scheme as-is forever. The code is designed to be extended to offer other locking schemes, such as MTA locking–usually a combination of this simple scheme and flock().
Despite being flagged as simple and not bullet proof all over the place, locking is good enough in practice for simple applications wishing to protect against concurrent actions.
There is an embeded POD manual page in Simple.pm.
– Raphael Manfredi Raphael_Manfredi@pobox.com