# ri > Concurrent::Synchronization::AbstractLockableObject

## [Concurrent::Synchronization::AbstractLockableObject](https://www.chedong.com/phpMan.php/perldoc/Concurrent%3A%3ASynchronization%3A%3AAbstractLockableObject/markdown) < [Concurrent::Synchronization::Object](https://www.chedong.com/phpMan.php/perldoc/Concurrent%3A%3ASynchronization%3A%3AObject/markdown)

(from /home/chedong/.local/share/rdoc)
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@!visibility private
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## Instance methods:

  ns_broadcast
  ns_signal
  ns_wait
  ns_wait_until
  synchronize