Function StoreFBClockDataV1

fbclock/shmem.go:164–180

StoreFBClockDataV1 will store fbclock data in shared mem, fd param should be open file descriptor of that shared mem.

(fd uintptr, d Data)

// StoreFBClockDataV1 will store fbclock data in shared mem,
// fd param should be open file descriptor of that shared mem.
func StoreFBClockDataV1(fd uintptr, d Data) error {
	cData := &C.fbclock_clockdata{
		ingress_time_ns:        C.int64_t(d.IngressTimeNS),
		error_bound_ns:         C.uint32_t(Uint64ToUint32(d.ErrorBoundNS)),
		holdover_multiplier_ns: C.uint32_t(FloatAsUint32(d.HoldoverMultiplierNS)),
		clock_smearing_start_s: C.uint64_t(d.SmearingStartS),
		clock_smearing_end_s:   C.uint64_t(d.SmearingEndS),
		utc_offset_pre_s:       C.int32_t(d.UTCOffsetPreS),
		utc_offset_post_s:      C.int32_t(d.UTCOffsetPostS),
	}
	// fbclock_clockdata_store_data comes from fbclock.c
	res := C.fbclock_clockdata_store_data(C.uint(fd), cData)
	if res != 0 {
		return fmt.Errorf("failed to store data: %s", strerror(res))
	}
	return nil
}

// MmapShmpData mmaps open file as fbclock shared memory. Used in tests only.
func MmapShmpData(fd uintptr) (unsafe.Pointer, error) {