| 提交 | 用户 | age | ||
| 9a89af | 1 | package deliver |
| Z | 2 | |
| 3 | import ( | |
| 4 | "errors" | |
| 5 | "fmt" | |
| be392a | 6 | // "io" |
| 9a89af | 7 | |
| fa89b4 | 8 | "time" |
| 9a89af | 9 | |
| b8c958 | 10 | "basic.com/valib/shm.git" |
| 9a89af | 11 | ) |
| Z | 12 | |
| 13 | // SHM share memory | |
| 14 | type SHM struct { | |
| 93ff14 | 15 | rw *shm.ReadWriteCloser |
| Z | 16 | typ td |
| be392a | 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 | ||
| be392a | 56 | ch := make(chan int) |
| fa89b4 | 57 | go func(){ |
| be392a | 58 | n, _ := s.rw.Read(s.data) |
| 5 | 59 | ch <- n |
| fa89b4 | 60 | }() |
| 5 | 61 | select{ |
| 62 | case d := <-ch: | |
| be392a | 63 | if d > 0{ |
| 5 | 64 | data := make([]byte, d) |
| 65 | copy(data, s.data) | |
| 66 | return data, nil | |
| 67 | } | |
| fa89b4 | 68 | case <- time.After(3 * time.Second): |
| 5 | 69 | return nil, errors.New("recv time out") |
| 9a89af | 70 | } |
| Z | 71 | |
| fa89b4 | 72 | return nil, errors.New("recv should't here") |
| 5 | 73 | |
| 74 | ||
| 75 | // data := make([]byte, maxRecvSize) | |
| 76 | // n, err := s.rw.Read(data) | |
| 77 | // if err == nil || err == io.EOF { | |
| 78 | // data = data[:n:n] | |
| 79 | // return data, nil | |
| 80 | // } | |
| 81 | ||
| 82 | // return nil, err | |
| 9a89af | 83 | } |
| Z | 84 | |
| 85 | // Close impl interface Deliver | |
| 86 | func (s *SHM) Close() { | |
| c2bbe3 | 87 | if s == nil { |
| Z | 88 | return |
| 89 | } | |
| 9a89af | 90 | if s.rw != nil { |
| Z | 91 | s.rw.Close() |
| 92 | } | |
| 93 | if s.typ == agent { | |
| 94 | shm.Unlink(s.rw.Name()) | |
| 95 | } | |
| 96 | } | |
| 97 | ||
| c2bbe3 | 98 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 99 | if m != Shm { |
| c2bbe3 | 100 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 101 | } |
| Z | 102 | |
| 103 | var param []int | |
| 104 | for _, v := range args { | |
| 105 | switch v.(type) { | |
| 106 | case int: | |
| 107 | param = append(param, v.(int)) | |
| 108 | default: | |
| 109 | ||
| c2bbe3 | 110 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 111 | } |
| Z | 112 | } |
| c2bbe3 | 113 | |
| 3603e5 | 114 | blocks, size := 2, maxRecvSize |
| 5 | 115 | if len(param) == 2 { |
| 116 | blocks, size = param[0], param[1] | |
| 117 | // return nil, errors.New("shmServer created recv too much parameters") | |
| 9a89af | 118 | } |
| 25d8c3 | 119 | shm.Unlink(url) |
| Z | 120 | |
| 3603e5 | 121 | rw, err := shm.CreateSimplex(url, 0644, blocks, size) |
| c2bbe3 | 122 | if err == nil { |
| e3c917 | 123 | fmt.Println(rw.Name()) |
| 9a89af | 124 | return &SHM{ |
| Z | 125 | rw, |
| 126 | agent, | |
| be392a | 127 | make([]byte, maxRecvSize), |
| c2bbe3 | 128 | }, nil |
| 9a89af | 129 | } |
| Z | 130 | |
| c2bbe3 | 131 | return nil, err |
| 9a89af | 132 | } |
| Z | 133 | |
| c2bbe3 | 134 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 135 | if m != Shm { |
| c2bbe3 | 136 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 137 | } |
| Z | 138 | |
| c2bbe3 | 139 | rw, err := shm.OpenSimplex(url) |
| Z | 140 | if err == nil { |
| 9a89af | 141 | return &SHM{ |
| Z | 142 | rw, |
| 143 | coactee, | |
| be392a | 144 | make([]byte, maxRecvSize), |
| c2bbe3 | 145 | }, nil |
| 9a89af | 146 | } |
| c2bbe3 | 147 | return nil, err |
| 9a89af | 148 | } |
