NAME¶

SHARYANTO::File::Flock - Yet another flock module

VERSION¶

version 0.56

SYNOPSIS¶

 use SHARYANTO::File::Flock;
 # try to acquire exclusive lock. if fail to acquire lock within 60s, die.
 my $lock = SHARYANTO::File::Flock->lock($file);
 # explicitly unlock
 $lock->release;
 # automatically unlock if object is DESTROY-ed.
 undef $lock;

DESCRIPTION¶

This is yet another flock module. It is a more lightweight alternative to File::Flock with some other differences:

•

OO interface only

•

Autoretry (by default for 60s) when trying to acquire lock

I prefer this approach to blocking/waiting indefinitely or failing immediately.

METHODS¶

$lock = SHARYANTO::File::Flock->lock($path, \%opts)¶

Acquire an exclusive lock on $path. $path will be created if not already exists. If $path is already locked by another process, will retry (by default for 60 seconds). Will die if failed to acquire lock. Will automatically unlock if $lock goes out of scope. Upon unlock, will remove $path if it was created and is still empty (this behavior is the same as File::Flock). Available options:

•

retries => INT (default: 60)

Number of retries (equals number of seconds, since retry is done every second).

$lock->unlock¶

Unlock.

$lock->release¶

Synonym for unlock().

CAVEATS¶

Not yet tested on Windows. Some filesystems do not support inode?

SEE ALSO¶

File::Flock File::Flock::Tiny which is also tiny, but does not have the autoremove and autoretry capability which I want. See also: https://github.com/trinitum/perl-File-Flock-Tiny/issues/1 flock() Perl function.

AUTHOR¶

Steven Haryanto <stevenharyanto@gmail.com>

COPYRIGHT AND LICENSE¶

This software is copyright (c) 2013 by Steven Haryanto. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

FUNCTIONS¶

None are exported by default, but they are exportable.