share one instance between multiple threads?

[abdellani]

Hi

is it safe to share one instance between multiple threads?
Do I need to use Mutex.new in the following context?
My answer is no, but I want to double-check.

class DLM
  include Singleton

  def initialize
    @instance = Redlock::Client.new([RedisClient.new(url: ENV['REDIS_URL'])])
    @mutex = Mutex.new
  end

  def lock(key, ttl)
    with_mutex { @instance.lock(key, ttl) }
  end

  def unlock(lock)
    with_mutex { @instance.unlock(lock) }
  end

  private

  def with_mutex(&block)
    @mutex.synchronize(&block)
  end
end