| 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 |
| 9a89af | 16 | } |
| Z | 17 | |
| 18 | // Send impl interface Diliver | |
| 19 | func (s *SHM) Send(data []byte) error { | |
| c2bbe3 | 20 | if s == nil || s.rw == nil { |
| 9a89af | 21 | return errors.New("please init shm producer first") |
| Z | 22 | } |
| 23 | ||
| fb46ee | 24 | n, err := s.rw.Write(data) |
| Z | 25 | if n < 1 { |
| 26 | fmt.Println("recv data less than 1 length") | |
| 9a89af | 27 | } |
| Z | 28 | |
| fb46ee | 29 | return err |
| 9a89af | 30 | } |
| Z | 31 | |
| 32 | // Recv impl interface Diliver | |
| 33 | func (s *SHM) Recv() ([]byte, error) { | |
| 34 | ||
| c2bbe3 | 35 | if s == nil || s.rw == nil { |
| 9a89af | 36 | return nil, errors.New("please open shm consumer first") |
| Z | 37 | } |
| 38 | ||
| 20a4c4 | 39 | // data := make([]byte, maxRecvSize) |
| Z | 40 | // n, err := s.rw.Read(data) |
| 41 | // if err == nil || err == io.EOF { | |
| 020e17 | 42 | // data := data[:n:n] |
| 20a4c4 | 43 | // return data, nil |
| Z | 44 | // } |
| 45 | ||
| 46 | data, err := s.rw.DirectRead() | |
| fb46ee | 47 | if err == nil || err == io.EOF { |
| Z | 48 | return data, nil |
| 9a89af | 49 | } |
| fb46ee | 50 | return nil, err |
| 9a89af | 51 | } |
| Z | 52 | |
| 020e17 | 53 | // Recv2 impl interface |
| 058b21 | 54 | func (s *SHM) Recv2(data []byte) (int, error) { |
| 020e17 | 55 | if s == nil || s.rw == nil { |
| 058b21 | 56 | return 0, errors.New("please open shm consumer first") |
| 020e17 | 57 | } |
| Z | 58 | |
| 59 | n, err := s.rw.Read(data) | |
| 60 | if err == nil || err == io.EOF { | |
| 61 | data = data[:n:n] | |
| 058b21 | 62 | return n, nil |
| 020e17 | 63 | } |
| Z | 64 | |
| 058b21 | 65 | return 0, err |
| 020e17 | 66 | } |
| Z | 67 | |
| 9a89af | 68 | // Close impl interface Deliver |
| Z | 69 | func (s *SHM) Close() { |
| c2bbe3 | 70 | if s == nil { |
| Z | 71 | return |
| 72 | } | |
| 9a89af | 73 | if s.rw != nil { |
| Z | 74 | s.rw.Close() |
| 75 | } | |
| 76 | if s.typ == agent { | |
| 77 | shm.Unlink(s.rw.Name()) | |
| 78 | } | |
| 79 | } | |
| 80 | ||
| c2bbe3 | 81 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 82 | if m != Shm { |
| c2bbe3 | 83 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 84 | } |
| Z | 85 | |
| 86 | var param []int | |
| 87 | for _, v := range args { | |
| 88 | switch v.(type) { | |
| 89 | case int: | |
| 90 | param = append(param, v.(int)) | |
| 91 | default: | |
| 92 | ||
| c2bbe3 | 93 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 94 | } |
| Z | 95 | } |
| fb46ee | 96 | |
| 512af9 | 97 | blocks, size := 2, maxRecvSize |
| Z | 98 | if len(param) == 2 { |
| 99 | blocks, size = param[0], param[1] | |
| 100 | // return nil, errors.New("shmServer created recv too much parameters") | |
| 101 | } | |
| 102 | ||
| 103 | time.Sleep(time.Millisecond) | |
| 25d8c3 | 104 | shm.Unlink(url) |
| Z | 105 | |
| 512af9 | 106 | rw, err := shm.CreateSimplex(url, 0644, blocks, size) |
| c2bbe3 | 107 | if err == nil { |
| e3c917 | 108 | fmt.Println(rw.Name()) |
| 9a89af | 109 | return &SHM{ |
| 20a4c4 | 110 | rw: rw, |
| Z | 111 | typ: agent, |
| c2bbe3 | 112 | }, nil |
| 9a89af | 113 | } |
| Z | 114 | |
| c2bbe3 | 115 | return nil, err |
| 9a89af | 116 | } |
| Z | 117 | |
| c2bbe3 | 118 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 119 | if m != Shm { |
| c2bbe3 | 120 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 121 | } |
| Z | 122 | |
| c2bbe3 | 123 | rw, err := shm.OpenSimplex(url) |
| Z | 124 | if err == nil { |
| 9a89af | 125 | return &SHM{ |
| 20a4c4 | 126 | rw: rw, |
| Z | 127 | typ: coactee, |
| c2bbe3 | 128 | }, nil |
| 9a89af | 129 | } |
| c2bbe3 | 130 | return nil, err |
| 9a89af | 131 | } |
