Alert process every minute real time?

A background process written in C language is expected to perform a
task each time the system clock rolls over to the next whole minute
of real time (+/- a second or two).

Is there any better way of alerting the process when this rollover
occurs other than a polling function which reads the system clock?

Other conditions: Self contained and not requiring user configuration
of system tools like cron. Portable to other Unix-like systems.

Thanks for your help and advice.

Regards,
Charles Sullivan


.

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