6c2752a863
Add helper functions to make it easy and less error-prone to convert between values in various time units (nsec, usec, msec) and struct timespec. These helpers are going to be used in the upcoming commits to transition the Weston codebase to struct timespec. Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>