func (y *Conn) kill(newerr os.Error) (err os.Error) {
//dbg.PrintStackTrace()
if newerr == nil {
panic("d,conn: nil kill err")
}
y.lk.Lock()
if y.err == nil {
y.err = newerr
err = newerr
} else {
y.lk.Unlock()
return os.EBADF
}
y.id = nil
y.regime = regimeClosed
tube := y.tube
y.tube = nil
close(y.dialch)
y.dialch = nil
y.lk.Unlock()
if tube != nil {
tube.Close()
}
if err == nil {
panic("d,conn: err == nil")
}
return err
}
// Atomically closes the connection if it is currently unused.
func (y *Conn) CloseIfReady() (err os.Error) {
y.lk.Lock()
if y.regime != regimeReady {
y.lk.Unlock()
return os.EAGAIN
}
if y.err != nil {
y.lk.Unlock()
return os.EBADF
}
y.err = os.EOF
y.id = nil
y.regime = regimeClosed
tube := y.tube
y.tube = nil
close(y.dialch)
y.dialch = nil
y.lk.Unlock()
if tube != nil {
tube.Close()
}
return nil
}