class Concurrent::MutexAtomicFixnum

def compare_and_set(expect, update)

Returns:
  • (Boolean) - true if the value was updated else false

Parameters:
  • update (Fixnum) -- the new value
  • expect (Fixnum) -- the expected value 
def compare_and_set(expect, update)
  @mutex.lock
  if @value == expect
    @value = update
    result = true
  else
    result = false
  end
  @mutex.unlock
  result
end