Method: Fluent::Counter::MutexHash#synchronize

Defined in:
lib/fluent/counter/mutex_hash.rb

#synchronize(*keys) ⇒ Object 



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# File 'lib/fluent/counter/mutex_hash.rb', line 40

def synchronize(*keys)
  return if keys.empty?

  locks = {}
  loop do
    @mutex.synchronize do
      keys.each do |key|
        mutex = @mutex_hash[key]
        unless mutex
          v = Mutex.new
          @mutex_hash[key] = v
          mutex = v
        end

        if mutex.try_lock
          locks[key] = mutex
        else
          locks.each_value(&:unlock)
          locks = {}          # flush locked keys
          break
        end
      end
    end

    next if locks.empty?      # failed to lock all keys

    locks.each do |(k, v)|
      yield @data_store, k
      v.unlock
    end
    break
  end
end