| 提交 | 用户 | age | ||
| 9a89af | 1 | package deliver |
| Z | 2 | |
| 3 | import ( | |
| 4 | "errors" | |
| 5 | "fmt" | |
| fb46ee | 6 | "io" |
| 512af9 | 7 | "time" |
| 9a89af | 8 | |
| b8c958 | 9 | "basic.com/valib/shm.git" |
| 9a89af | 10 | ) |
| Z | 11 | |
| 12 | // SHM share memory | |
| 13 | type SHM struct { | |
| 93ff14 | 14 | rw *shm.ReadWriteCloser |
| Z | 15 | typ td |
| 0ac4c1 | 16 | |
| Z | 17 | recvData []byte |
| 9a89af | 18 | } |
| Z | 19 | |
| 20 | // Send impl interface Diliver | |
| 21 | func (s *SHM) Send(data []byte) error { | |
| c2bbe3 | 22 | if s == nil || s.rw == nil { |
| 9a89af | 23 | return errors.New("please init shm producer first") |
| Z | 24 | } |
| 25 | ||
| fb46ee | 26 | n, err := s.rw.Write(data) |
| Z | 27 | if n < 1 { |
| 28 | fmt.Println("recv data less than 1 length") | |
| 9a89af | 29 | } |
| Z | 30 | |
| fb46ee | 31 | return err |
| 9a89af | 32 | } |
| Z | 33 | |
| 34 | // Recv impl interface Diliver | |
| 35 | func (s *SHM) Recv() ([]byte, error) { | |
| 36 | ||
| c2bbe3 | 37 | if s == nil || s.rw == nil { |
| 9a89af | 38 | return nil, errors.New("please open shm consumer first") |
| Z | 39 | } |
| 40 | ||
| 0ac4c1 | 41 | if s.recvData == nil { |
| Z | 42 | s.recvData = make([]byte, maxRecvSize) |
| 43 | } | |
| 44 | n, err := s.rw.Read(s.recvData) | |
| fb46ee | 45 | if err == nil || err == io.EOF { |
| 0ac4c1 | 46 | data := make([]byte, n) |
| Z | 47 | copy(data, s.recvData) |
| fb46ee | 48 | return data, nil |
| 9a89af | 49 | } |
| Z | 50 | |
| fb46ee | 51 | return nil, err |
| 9a89af | 52 | } |
| Z | 53 | |
| 54 | // Close impl interface Deliver | |
| 55 | func (s *SHM) Close() { | |
| c2bbe3 | 56 | if s == nil { |
| Z | 57 | return |
| 58 | } | |
| 9a89af | 59 | if s.rw != nil { |
| Z | 60 | s.rw.Close() |
| 61 | } | |
| 62 | if s.typ == agent { | |
| 63 | shm.Unlink(s.rw.Name()) | |
| 64 | } | |
| 65 | } | |
| 66 | ||
| c2bbe3 | 67 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 68 | if m != Shm { |
| c2bbe3 | 69 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 70 | } |
| Z | 71 | |
| 72 | var param []int | |
| 73 | for _, v := range args { | |
| 74 | switch v.(type) { | |
| 75 | case int: | |
| 76 | param = append(param, v.(int)) | |
| 77 | default: | |
| 78 | ||
| c2bbe3 | 79 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 80 | } |
| Z | 81 | } |
| fb46ee | 82 | |
| 512af9 | 83 | blocks, size := 2, maxRecvSize |
| Z | 84 | if len(param) == 2 { |
| 85 | blocks, size = param[0], param[1] | |
| 86 | // return nil, errors.New("shmServer created recv too much parameters") | |
| 87 | } | |
| 88 | ||
| 89 | time.Sleep(time.Millisecond) | |
| 25d8c3 | 90 | shm.Unlink(url) |
| Z | 91 | |
| 512af9 | 92 | rw, err := shm.CreateSimplex(url, 0644, blocks, size) |
| c2bbe3 | 93 | if err == nil { |
| e3c917 | 94 | fmt.Println(rw.Name()) |
| 9a89af | 95 | return &SHM{ |
| 0ac4c1 | 96 | rw: rw, |
| Z | 97 | typ: agent, |
| 98 | recvData: nil, | |
| c2bbe3 | 99 | }, nil |
| 9a89af | 100 | } |
| Z | 101 | |
| c2bbe3 | 102 | return nil, err |
| 9a89af | 103 | } |
| Z | 104 | |
| c2bbe3 | 105 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 106 | if m != Shm { |
| c2bbe3 | 107 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 108 | } |
| Z | 109 | |
| c2bbe3 | 110 | rw, err := shm.OpenSimplex(url) |
| Z | 111 | if err == nil { |
| 9a89af | 112 | return &SHM{ |
| 0ac4c1 | 113 | rw: rw, |
| Z | 114 | typ: coactee, |
| 115 | recvData: nil, | |
| c2bbe3 | 116 | }, nil |
| 9a89af | 117 | } |
| c2bbe3 | 118 | return nil, err |
| 9a89af | 119 | } |
