RUMP_F_FSINOUT
#define RUMP__FCNRW(c, t) RUMP__FCN(RUMP_F_FSINOUT, (c), (int)sizeof(t))
#define RUMP__FCNRW_FSPRIV(f, c, t) RUMP__FCN_FSPRIV(RUMP_F_FSINOUT, (f), (c), (int)sizeof(t))