# phpman > man > Apache::Session::Lock::Null(3pm)

## NAME
    [Apache::Session::Lock::Null](https://www.chedong.com/phpMan.php/perldoc/Apache%3A%3ASession%3A%3ALock%3A%3ANull/markdown) - Does not actually provides mutual exclusion

## SYNOPSIS
     use [Apache::Session::Lock::Null](https://www.chedong.com/phpMan.php/perldoc/Apache%3A%3ASession%3A%3ALock%3A%3ANull/markdown);

     my $locker = [Apache::Session::Lock::Null](https://www.chedong.com/phpMan.php/perldoc/Apache%3A%3ASession%3A%3ALock%3A%3ANull/markdown)->new;

     $locker->acquire_read_lock($ref);
     $locker->acquire_write_lock($ref);
     $locker->release_read_lock($ref);
     $locker->release_write_lock($ref);
     $locker->release_all_locks($ref);

## DESCRIPTION
    [Apache::Session::Lock::Null](https://www.chedong.com/phpMan.php/perldoc/Apache%3A%3ASession%3A%3ALock%3A%3ANull/markdown) fulfills the locking interface of [Apache::Session](https://www.chedong.com/phpMan.php/perldoc/Apache%3A%3ASession/markdown), without actually
    doing any work. This is the module to use if you want maximum performance and don't actually
    need locking.

## AUTHOR
    This module was written by Jeffrey William Baker <<jwbaker@acm.org>>.

## SEE ALSO
    [Apache::Session](https://www.chedong.com/phpMan.php/perldoc/Apache%3A%3ASession/markdown)