Arduino Operative System?

hi, im doing research on operative system of arduino(if has one). so, googling didnt found os of arduino.
i want know if has one, , can find info it.
i want project process synchronization on arduino, ideas? producer consumer problem. found library (http://ryanmsutton.com/arduino-libraries/arduino-producer-consumer-library/) dont understand @ all. tips achieve this?

thanks in advance!

arduino not have operating system.

pete

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