| 26 | func NewVirtualConn(s *session.Session) *VirtualConn { return &VirtualConn{s: s} } |
| 27 | |
| 28 | func (v *VirtualConn) Read(b []byte) (int, error) { |
| 29 | for { |
| 30 | v.mu.Lock() |
| 31 | if len(v.readBuf) > 0 { |
| 32 | n := copy(b, v.readBuf) |
| 33 | v.readBuf = v.readBuf[n:] |
| 34 | v.mu.Unlock() |
| 35 | return n, nil |
| 36 | } |
| 37 | deadline := v.readDeadline |
| 38 | v.mu.Unlock() |
| 39 | |
| 40 | var timerCh <-chan time.Time |
| 41 | if !deadline.IsZero() { |
| 42 | dur := time.Until(deadline) |
| 43 | if dur <= 0 { |
| 44 | return 0, context.DeadlineExceeded |
| 45 | } |
| 46 | timerCh = time.After(dur) |
| 47 | } |
| 48 | |
| 49 | select { |
| 50 | case data, ok := <-v.s.RxChan: |
| 51 | if !ok { |
| 52 | return 0, io.EOF |
| 53 | } |
| 54 | if len(data) == 0 { |
| 55 | continue |
| 56 | } |
| 57 | v.mu.Lock() |
| 58 | n := copy(b, data) |
| 59 | if n < len(data) { |
| 60 | v.readBuf = data[n:] |
| 61 | } |
| 62 | v.mu.Unlock() |
| 63 | return n, nil |
| 64 | case <-timerCh: |
| 65 | return 0, context.DeadlineExceeded |
| 66 | } |
| 67 | } |
| 68 | } |
| 69 | |
| 70 | func (v *VirtualConn) Write(b []byte) (int, error) { |
| 71 | if len(b) > 0 { |