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Asked: 2026-05-11T20:06:26+00:00

I saw an answer to a question regarding timing which used __sync_synchronize(). What does

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I saw an answer to a question regarding timing which used __sync_synchronize().

  • What does this function do?
  • And when is it necessary to be used?
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1 Answer

  1. Editorial Team

    It is a atomic builtin for full memory barrier.

    No memory operand will be moved across the operation, either forward
    or backward. Further, instructions will be issued as necessary to
    prevent the processor from speculating loads across the operation and
    from queuing stores after the operation.

    Check details on the link above.

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