Cycle(3) User Contributed Perl Documentation Cycle(3)

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

Version 1.06

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.

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

Checks that $reference does have any circular memory references.

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".

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".

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

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.

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

perldoc Test::Memory::Cycle

You can also look for information at:

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

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.

2020-05-25 perl v5.30.2