def _observe_callback(self, instance, cbtype, resp):
resp = ffi.cast('lcb_RESPOBSERVE*', resp)
if resp.rflags & C.LCB_RESP_F_FINAL:
mres = ffi.from_handle(resp.cookie)
self._chk_op_done(mres)
return
rc = resp.rc
result, mres = self._callback_common(instance, cbtype, resp)
if rc:
if not result.rc:
result.rc = rc
return
oi = ObserveInfo()
oi.cas = resp.cas
oi.flags = resp.status
oi.from_master = resp.ismaster
result.value.append(oi)
