F_FSIN
if (cmd & F_FSIN) {
#define F_FSINOUT (F_FSIN | F_FSOUT)
#define _FCNR(c, t) _FCN(F_FSIN, (c), (int)sizeof(t))
#define _FCNR_FSPRIV(f, c, t) _FCN_FSPRIV(F_FSIN, (f), (c), (int)sizeof(t))