| 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 |
| 9a89af | 17 | } |
| Z | 18 | |
| 19 | // Send impl interface Diliver | |
| 20 | func (s *SHM) Send(data []byte) error { | |
| c2bbe3 | 21 | if s == nil || s.rw == nil { |
| 9a89af | 22 | return errors.New("please init shm producer first") |
| Z | 23 | } |
| 24 | ||
| fa89b4 | 25 | ch := make(chan int) |
| 5 | 26 | go func(){ |
| 27 | n, _ := s.rw.Write(data) | |
| 28 | ch <- n | |
| 29 | }() | |
| 30 | select{ | |
| 31 | case <-ch: | |
| 32 | return nil | |
| 33 | case <- time.After(3 * time.Second): | |
| 34 | return errors.New("send time out") | |
| 9a89af | 35 | } |
| Z | 36 | |
| fa89b4 | 37 | return errors.New("send should't here") |
| 5 | 38 | |
| 39 | // n, err := s.rw.Write(data) | |
| 40 | // if n < 1 { | |
| 41 | // fmt.Println("recv data less than 1 length") | |
| 42 | // } | |
| 43 | ||
| 44 | // return err | |
| 9a89af | 45 | } |
| Z | 46 | |
| 47 | // Recv impl interface Diliver | |
| 48 | func (s *SHM) Recv() ([]byte, error) { | |
| 49 | ||
| c2bbe3 | 50 | if s == nil || s.rw == nil { |
| 9a89af | 51 | return nil, errors.New("please open shm consumer first") |
| Z | 52 | } |
| 53 | ||
| fa89b4 | 54 | ch := make(chan []byte) |
| 5 | 55 | go func(){ |
| 56 | data := make([]byte, maxRecvSize) | |
| 57 | n, err := s.rw.Read(data) | |
| 58 | if err == nil || err == io.EOF { | |
| 59 | data = data[:n:n] | |
| 60 | } | |
| 61 | ch <- data | |
| 62 | }() | |
| 63 | select{ | |
| 64 | case d := <-ch: | |
| 65 | return d, nil | |
| 66 | case <- time.After(3 * time.Second): | |
| 67 | return nil, errors.New("recv time out") | |
| 9a89af | 68 | } |
| Z | 69 | |
| fa89b4 | 70 | return nil, errors.New("recv should't here") |
| 5 | 71 | |
| 72 | ||
| 73 | // data := make([]byte, maxRecvSize) | |
| 74 | // n, err := s.rw.Read(data) | |
| 75 | // if err == nil || err == io.EOF { | |
| 76 | // data = data[:n:n] | |
| 77 | // return data, nil | |
| 78 | // } | |
| 79 | ||
| 80 | // return nil, err | |
| 9a89af | 81 | } |
| Z | 82 | |
| 83 | // Close impl interface Deliver | |
| 84 | func (s *SHM) Close() { | |
| c2bbe3 | 85 | if s == nil { |
| Z | 86 | return |
| 87 | } | |
| 9a89af | 88 | if s.rw != nil { |
| Z | 89 | s.rw.Close() |
| 90 | } | |
| 91 | if s.typ == agent { | |
| 92 | shm.Unlink(s.rw.Name()) | |
| 93 | } | |
| 94 | } | |
| 95 | ||
| c2bbe3 | 96 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 97 | if m != Shm { |
| c2bbe3 | 98 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 99 | } |
| Z | 100 | |
| 101 | var param []int | |
| 102 | for _, v := range args { | |
| 103 | switch v.(type) { | |
| 104 | case int: | |
| 105 | param = append(param, v.(int)) | |
| 106 | default: | |
| 107 | ||
| c2bbe3 | 108 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 109 | } |
| Z | 110 | } |
| bf6ffa | 111 | blocks, size := 2, maxRecvSize |
| 9a89af | 112 | if len(param) != 2 { |
| c2bbe3 | 113 | return nil, errors.New("shmServer created recv too much parameters") |
| 9a89af | 114 | } |
| c2bbe3 | 115 | |
| bf6ffa | 116 | blocks, size = param[0], param[1] |
| 5 | 117 | |
| 25d8c3 | 118 | shm.Unlink(url) |
| Z | 119 | |
| bf6ffa | 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, | |
| c2bbe3 | 126 | }, nil |
| 9a89af | 127 | } |
| Z | 128 | |
| c2bbe3 | 129 | return nil, err |
| 9a89af | 130 | } |
| Z | 131 | |
| c2bbe3 | 132 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 133 | if m != Shm { |
| c2bbe3 | 134 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 135 | } |
| Z | 136 | |
| c2bbe3 | 137 | rw, err := shm.OpenSimplex(url) |
| Z | 138 | if err == nil { |
| 9a89af | 139 | return &SHM{ |
| Z | 140 | rw, |
| 141 | coactee, | |
| c2bbe3 | 142 | }, nil |
| 9a89af | 143 | } |
| c2bbe3 | 144 | return nil, err |
| 9a89af | 145 | } |
