cdef inline add_flowcontrol_defaults(high, low, int kb):

cdef int h, l

if high is None:

if low is None:

h = kb * 1024

else:

l = low

h = 4 * l

else:

h = high

if low is None:

l = h // 4

else:

l = low

if not h >= l >= 0:

raise ValueError('high (%r) must be >= low (%r) must be >= 0' %

(h, l))

return h, l