func Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error) {
	r0, e1 := callpselect(nfd, uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), uintptr(unsafe.Pointer(sigmask)))
	n = int(r0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func callselect(nfd int, r uintptr, w uintptr, e uintptr, timeout uintptr) (r1 uintptr, e1 Errno) {
	r1 = uintptr(C.c_select(C.int(nfd), C.uintptr_t(r), C.uintptr_t(w), C.uintptr_t(e), C.uintptr_t(timeout)))
	e1 = syscall.GetErrno()
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func callselect(nfd int, r uintptr, w uintptr, e uintptr, timeout uintptr) (r1 uintptr, e1 Errno) {
	r1, _, e1 = syscall6(uintptr(unsafe.Pointer(&libc_select)), 5, uintptr(nfd), r, w, e, timeout, 0)
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

type caseInfo struct {
	desc      string
	canSelect bool
	recv      Value
	closed    bool
	helper    func()
	panic     bool
}

var allselect = flag.Bool("allselect", false, "exhaustive select test")

func TestSelect(t *testing.T) {
	selectWatch.once.Do(func() { go selectWatcher() })

	var x exhaustive
	nch := 0