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Editorial Team
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Asked: 2026-06-09T20:30:30+00:00

I have to share serial port read function with two other functions, basically first

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I have to share serial port read function with two other functions, basically

  1. first function keeps polling on serial port read function for data every 1000 msec

  2. when something is written to serial port , it has to read back ack/nack from serial port.

    Can anyone suggest how this synchronization can be achieved efficiently with mutex or any other synchronization functionality available in linux for common read function? I am not using any threads for these operation since this is done on polling basis.

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1 Answer

  1. Editorial Team

    Just disable the polling while you wait for ack. You don’t need a mutex because you’re not using a thread, just use a global variable set by the writing function and read by the polling, so that you know if you have to skip polling.

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