| 提交 | 用户 | age | ||
| 9a89af | 1 | package deliver |
| Z | 2 | |
| 3 | import ( | |
| 4 | "errors" | |
| 5 | "fmt" | |
| 6 | "io" | |
| 7 | ||
| fa89b4 | 8 | "time" |
| 5 | 9 | |
| 9a89af | 10 | "github.com/tmthrgd/shm-go" |
| Z | 11 | ) |
| 12 | ||
| 13 | // SHM share memory | |
| 14 | type SHM struct { | |
| 93ff14 | 15 | rw *shm.ReadWriteCloser |
| Z | 16 | typ td |
| 43e52a | 17 | |
| 5 | 18 | data []byte |
| 9a89af | 19 | } |
| Z | 20 | |
| 21 | // Send impl interface Diliver | |
| 22 | func (s *SHM) Send(data []byte) error { | |
| c2bbe3 | 23 | if s == nil || s.rw == nil { |
| 9a89af | 24 | return errors.New("please init shm producer first") |
| Z | 25 | } |
| 26 | ||
| fa89b4 | 27 | ch := make(chan int) |
| 5 | 28 | go func(){ |
| 29 | n, _ := s.rw.Write(data) | |
| 30 | ch <- n | |
| 31 | }() | |
| 32 | select{ | |
| 33 | case <-ch: | |
| 34 | return nil | |
| 35 | case <- time.After(3 * time.Second): | |
| 36 | return errors.New("send time out") | |
| 9a89af | 37 | } |
| Z | 38 | |
| fa89b4 | 39 | return errors.New("send should't here") |
| 5 | 40 | |
| 41 | // n, err := s.rw.Write(data) | |
| 42 | // if n < 1 { | |
| 43 | // fmt.Println("recv data less than 1 length") | |
| 44 | // } | |
| 45 | ||
| 46 | // return err | |
| 9a89af | 47 | } |
| Z | 48 | |
| 49 | // Recv impl interface Diliver | |
| 50 | func (s *SHM) Recv() ([]byte, error) { | |
| 51 | ||
| c2bbe3 | 52 | if s == nil || s.rw == nil { |
| 9a89af | 53 | return nil, errors.New("please open shm consumer first") |
| Z | 54 | } |
| 55 | ||
| fa89b4 | 56 | ch := make(chan []byte) |
| 5 | 57 | go func(){ |
| 43e52a | 58 | n, err := s.rw.Read(s.data) |
| fa89b4 | 59 | if err == nil || err == io.EOF { |
| 43e52a | 60 | s.data = s.data[:n:n] |
| fa89b4 | 61 | } |
| 43e52a | 62 | ch <- s.data |
| fa89b4 | 63 | }() |
| 5 | 64 | select{ |
| 65 | case d := <-ch: | |
| 66 | return d, nil | |
| 67 | case <- time.After(3 * time.Second): | |
| 68 | return nil, errors.New("recv time out") | |
| 9a89af | 69 | } |
| Z | 70 | |
| fa89b4 | 71 | return nil, errors.New("recv should't here") |
| 5 | 72 | |
| 73 | ||
| 74 | // data := make([]byte, maxRecvSize) | |
| 75 | // n, err := s.rw.Read(data) | |
| 76 | // if err == nil || err == io.EOF { | |
| 77 | // data = data[:n:n] | |
| 78 | // return data, nil | |
| 79 | // } | |
| 80 | ||
| 81 | // return nil, err | |
| 9a89af | 82 | } |
| Z | 83 | |
| 84 | // Close impl interface Deliver | |
| 85 | func (s *SHM) Close() { | |
| c2bbe3 | 86 | if s == nil { |
| Z | 87 | return |
| 88 | } | |
| 9a89af | 89 | if s.rw != nil { |
| Z | 90 | s.rw.Close() |
| 91 | } | |
| 92 | if s.typ == agent { | |
| 93 | shm.Unlink(s.rw.Name()) | |
| 94 | } | |
| 95 | } | |
| 96 | ||
| c2bbe3 | 97 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 98 | if m != Shm { |
| c2bbe3 | 99 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 100 | } |
| Z | 101 | |
| 102 | var param []int | |
| 103 | for _, v := range args { | |
| 104 | switch v.(type) { | |
| 105 | case int: | |
| 106 | param = append(param, v.(int)) | |
| 107 | default: | |
| 108 | ||
| c2bbe3 | 109 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 110 | } |
| Z | 111 | } |
| 3603e5 | 112 | |
| 5 | 113 | blocks, size := 2, maxRecvSize |
| 114 | if len(param) == 2 { | |
| 115 | blocks, size = param[0], param[1] | |
| 116 | // return nil, errors.New("shmServer created recv too much parameters") | |
| 9a89af | 117 | } |
| 25d8c3 | 118 | shm.Unlink(url) |
| Z | 119 | |
| 3603e5 | 120 | rw, err := shm.CreateSimplex(url, 0644, blocks, size) |
| c2bbe3 | 121 | if err == nil { |
| e3c917 | 122 | fmt.Println(rw.Name()) |
| 9a89af | 123 | return &SHM{ |
| Z | 124 | rw, |
| 125 | agent, | |
| 43e52a | 126 | make([]byte, maxRecvSize), |
| c2bbe3 | 127 | }, nil |
| 9a89af | 128 | } |
| Z | 129 | |
| c2bbe3 | 130 | return nil, err |
| 9a89af | 131 | } |
| Z | 132 | |
| c2bbe3 | 133 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 134 | if m != Shm { |
| c2bbe3 | 135 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 136 | } |
| Z | 137 | |
| c2bbe3 | 138 | rw, err := shm.OpenSimplex(url) |
| Z | 139 | if err == nil { |
| 9a89af | 140 | return &SHM{ |
| Z | 141 | rw, |
| 142 | coactee, | |
| 43e52a | 143 | make([]byte, maxRecvSize), |
| c2bbe3 | 144 | }, nil |
| 9a89af | 145 | } |
| c2bbe3 | 146 | return nil, err |
| 9a89af | 147 | } |
