func (p poller) Wait(duration time.Duration) ([]event, error) {
const maxEvents = 64
inEvents := make([]C.struct_kevent, maxEvents)
n, err := C.kevent(C.int(p), nil, 0, (*C.struct_kevent)(unsafe.Pointer(&inEvents[0])), maxEvents, p.timespec(duration))
if err != nil {
if err == syscall.EINTR {
err = nil
}
return nil, err
}
events := make([]event, int(n))
for ii := 0; ii < int(n); ii++ {
inEvent := inEvents[ii]
var flags Flags
if inEvent.filter&C.EVFILT_READ != 0 {
flags |= In
}
if inEvent.filter&C.EVFILT_WRITE != 0 {
flags |= Out
}
if inEvent.flags&C.EV_ONESHOT != 0 {
flags |= OneShot
}
events[ii] = event{
fd: int(inEvent.ident),
flags: flags,
}
}
return events, nil
}
func (p poller) applyEvent(ev *C.struct_kevent) error {
ok, err := C.kevent(C.int(p), ev, 1, nil, 0, p.timespec(0))
if ok < 0 {
return err
}
return nil
}