get_absolute_time() function

Timestamp functions relating to points in time (including the current time). These are functions for dealing with timestamps (i.e. instants in time) represented by the type absolute_time_t. This opaque type is provided to help prevent accidental mixing of timestamps and relative time values. Return a representation of the current time. Returns an opaque high fidelity representation of the current time sampled during the call. \sa absolute_time_t \sa sleep_until() \sa time_us_64()