• NAME
• VERSION
• SYNOPSIS
• FUNCTIONS
  • memory_cycle_ok( $reference, $msg )
  • memory_cycle_exists( $reference, $msg )
  • weakened_memory_cycle_ok( $reference, $msg )
  • weakened_memory_cycle_exists( $reference, $msg )
• AUTHOR
• BUGS
• SUPPORT
• ACKNOWLEDGEMENTS
• COPYRIGHT

NAME

Test::Memory::Cycle - Check for memory leaks and circular memory references

VERSION

Version 1.06

SYNOPSIS

Perl's garbage collection has one big problem: Circular references can't get cleaned up. A circular reference can be as simple as two references that refer to each other:

    my $mom = {
        name => "Marilyn Lester",
    };

    my $me = {
        name => "Andy Lester",
        mother => $mom,
    };
    $mom->{son} = $me;

Test::Memory::Cycle is built on top of Devel::Cycle to give you an easy way to check for these circular references.

    use Test::Memory::Cycle;

    my $object = new MyObject;
    # Do stuff with the object.
    memory_cycle_ok( $object );

You can also use memory_cycle_exists() to make sure that you have a cycle where you expect to have one.

FUNCTIONS

memory_cycle_ok( $reference, $msg )

Checks that $reference doesn't have any circular memory references.

memory_cycle_exists( $reference, $msg )

Checks that $reference does have any circular memory references.

weakened_memory_cycle_ok( $reference, $msg )

Checks that $reference doesn't have any circular memory references, but unlike memory_cycle_ok this will also check for weakened cycles produced with Scalar::Util's weaken.

weakened_memory_cycle_exists( $reference, $msg )

Checks that $reference does have any circular memory references, but unlike memory_cycle_exists this will also check for weakened cycles produced with Scalar::Util's weaken.

AUTHOR

Written by Andy Lester, <andy @ petdance.com>.

BUGS

Please report any bugs or feature requests to bug-test-memory-cycle at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Test-Memory-Cycle. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Test::Memory::Cycle

You can also look for information at:

• AnnoCPAN: Annotated CPAN documentation

  http://annocpan.org/dist/Test-Memory-Cycle

• CPAN Ratings

  http://cpanratings.perl.org/d/Test-Memory-Cycle

• RT: CPAN's request tracker

  http://rt.cpan.org/NoAuth/Bugs.html?Dist=Test-Memory-Cycle

• Search CPAN

  http://search.cpan.org/dist/Test-Memory-Cycle

ACKNOWLEDGEMENTS

Thanks to the contributions of Stevan Little, and to Lincoln Stein for writing Devel::Cycle.

COPYRIGHT

Copyright 2003-2016 Andy Lester.

This program is free software; you can redistribute it and/or modify it under the terms of the Artistic License v2.0.

See http://www.perlfoundation.org/artistic_license_2_0 or the LICENSE file that comes with the Test::Memory::Cycle distribution.