class Concurrent::AtomicMarkableReference

def try_update!

Raises:
  • (Concurrent::ConcurrentUpdateError) - if the update fails

Returns:
  • (Array) - the new value and marked state

Other tags:
    Yieldparam: old_mark - the starting state of marked
    Yieldparam: old_val - the starting value of the atomic reference

Other tags:
    Yield: - Calculate a new value and marked state for the atomic 
def try_update!
  old_val, old_mark = reference
  new_val, new_mark = yield old_val, old_mark
  unless compare_and_set old_val, new_val, old_mark, new_mark
    fail ::Concurrent::ConcurrentUpdateError,
         'AtomicMarkableReference: Update failed due to race condition.',
         'Note: If you would like to guarantee an update, please use ' +
             'the `AtomicMarkableReference#update` method.'
  end
  immutable_array(new_val, new_mark)
end