Method: Concurrent::AtomicMarkableReference#update

Defined in:
lib/concurrent-ruby/concurrent/atomic/atomic_markable_reference.rb

#update {|Object| ... } ⇒ Array

Pass the current value and marked state to the given block, replacing it with the block’s results. May retry if the value changes during the block’s execution.

Yields:

  • (Object) —

    Calculate a new value and marked state for the atomic reference using given (old) value and (old) marked

Yield Parameters:

  • old_val (Object) —

    the starting value of the atomic reference

  • old_mark (Boolean) —

    the starting state of marked

Returns:

  • (Array) —

    the new value and new mark



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# File 'lib/concurrent-ruby/concurrent/atomic/atomic_markable_reference.rb', line 105

def update
  loop do
    old_val, old_mark = reference
    new_val, new_mark = yield old_val, old_mark

    if compare_and_set old_val, new_val, old_mark, new_mark
      return immutable_array(new_val, new_mark)
    end
  end
end