int wait_relative_us(pt_unique_lock &lock, int timeout_us) noexcept { timespec ts({ 0, 0 }); ts = timespec_utils::add_us(ts, timeout_us); return timedwait_relative(lock, ts); }
int wait_relative(pt_unique_lock &lock, const timespec &timeout_ts) noexcept { return timedwait_relative(lock, timeout_ts); }
int wait_relative_ns(pt_unique_lock &lock, int timeout_ns) noexcept { timespec ts({ 0, timeout_ns }); return timedwait_relative(lock, ts); }