NAME

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

VERSION

       This document describes version 0.62 of File::Flock::Retry (from Perl distribution File-
       Flock-Retry), released on 2017-07-01.

SYNOPSIS

        use File::Flock::Retry;

        # try to acquire exclusive lock. if fail to acquire lock within 60s, die.
        my $lock = File::Flock::Retry->lock($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.

CAVEATS

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

METHODS

   $lock = File::Flock::Retry->lock($path, \%opts)
       Attempt to acquire an exclusive lock on $path. $path will be created if not already
       exists. If $path is already locked by another process, will retry every second for a
       number of seconds (by default 60). Will die if failed to acquire lock after all retries.

       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).

       •   shared => bool (default: 0)

           By default, an exclusive lock (LOCK_EX) is attempted. However, if this option is set
           to true, a shared lock (LOCK_SH) is attempted.

   $lock->unlock
       Unlock.

   $lock->release
       Synonym for "unlock()".

HOMEPAGE

       Please visit the project's homepage at <https://metacpan.org/release/File-Flock-Retry>.

SOURCE

       Source repository is at <https://github.com/perlancar/perl-File-Flock-Retry>.

BUGS

       Please report any bugs or feature requests on the bugtracker website
       <https://rt.cpan.org/Public/Dist/Display.html?Name=File-Flock-Retry>

       When submitting a bug or request, please include a test-file or a patch to an existing
       test-file that illustrates the bug or desired feature.

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

       perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2017, 2015, 2014 by perlancar@cpan.org.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.