func writeReturn(conn n.Conn, msg interface{}) ([]interface{}, error) {
if err := conn.Write(msg); err != nil {
return nil, err
}
reply, err := conn.Read()
if err != nil {
return nil, err
}
retrn, ok := reply.(*returnMsg)
if !ok {
return nil, NewError("foreign return type")
}
if retrn.Err != nil {
return nil, err
}
return retrn.Out, nil
}
func (r *Runtime) readGotPtrPtr(ptrPtr []*ptrPtrMsg, conn n.Conn) error {
p := make(map[circuit.HandleID]struct{})
for _, pp := range ptrPtr {
p[pp.ID] = struct{}{}
}
for len(p) > 0 {
m_, err := conn.Read()
if err != nil {
return err
}
m, ok := m_.(*gotPtrMsg)
if !ok {
return NewError("gotPtrMsg expected")
}
_, present := p[m.ID]
if !present {
return NewError("ack'ing unsent ptrPtrMsg")
}
delete(p, m.ID)
}
return nil
}