| 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 |
| 4f3bd6 | 16 | |
| 47adbb | 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 | ||
| 4f3bd6 | 41 | // orig |
| Z | 42 | |
| 20a4c4 | 43 | // data := make([]byte, maxRecvSize) |
| Z | 44 | // n, err := s.rw.Read(data) |
| 45 | // if err == nil || err == io.EOF { | |
| 020e17 | 46 | // data := data[:n:n] |
| 20a4c4 | 47 | // return data, nil |
| Z | 48 | // } |
| 49 | ||
| 4f3bd6 | 50 | // cur |
| Z | 51 | |
| 47adbb | 52 | data, err := s.rw.DirectRead() |
| Z | 53 | if err == nil || err == io.EOF { |
| 54 | return data, nil | |
| 55 | } | |
| 4f3bd6 | 56 | |
| Z | 57 | // new |
| 58 | ||
| 47adbb | 59 | // if s.recvData == nil { |
| Z | 60 | // s.recvData = make([]byte, maxRecvSize) |
| 61 | // } | |
| 62 | // sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&s.recvData)) | |
| 63 | // // sliceHeader.Cap = maxRecvSize | |
| 64 | // sliceHeader.Len = maxRecvSize | |
| 4f3bd6 | 65 | |
| 47adbb | 66 | // n, err := s.rw.Read(s.recvData) |
| Z | 67 | // if err == nil || err == io.EOF { |
| 68 | // sliceHeader.Len = n | |
| 69 | // return s.recvData, nil | |
| 70 | // } | |
| 4f3bd6 | 71 | |
| fb46ee | 72 | return nil, err |
| 9a89af | 73 | } |
| Z | 74 | |
| 020e17 | 75 | // Recv2 impl interface |
| 058b21 | 76 | func (s *SHM) Recv2(data []byte) (int, error) { |
| 020e17 | 77 | if s == nil || s.rw == nil { |
| 058b21 | 78 | return 0, errors.New("please open shm consumer first") |
| 020e17 | 79 | } |
| Z | 80 | |
| 81 | n, err := s.rw.Read(data) | |
| 82 | if err == nil || err == io.EOF { | |
| 83 | data = data[:n:n] | |
| 058b21 | 84 | return n, nil |
| 020e17 | 85 | } |
| Z | 86 | |
| 058b21 | 87 | return 0, err |
| 020e17 | 88 | } |
| Z | 89 | |
| 9a89af | 90 | // Close impl interface Deliver |
| Z | 91 | func (s *SHM) Close() { |
| c2bbe3 | 92 | if s == nil { |
| Z | 93 | return |
| 94 | } | |
| 9a89af | 95 | if s.rw != nil { |
| Z | 96 | s.rw.Close() |
| 97 | } | |
| 98 | if s.typ == agent { | |
| 99 | shm.Unlink(s.rw.Name()) | |
| 100 | } | |
| 101 | } | |
| 102 | ||
| c2bbe3 | 103 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 104 | if m != Shm { |
| c2bbe3 | 105 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 106 | } |
| Z | 107 | |
| 108 | var param []int | |
| 109 | for _, v := range args { | |
| 110 | switch v.(type) { | |
| 111 | case int: | |
| 112 | param = append(param, v.(int)) | |
| 113 | default: | |
| 114 | ||
| c2bbe3 | 115 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 116 | } |
| Z | 117 | } |
| fb46ee | 118 | |
| 512af9 | 119 | blocks, size := 2, maxRecvSize |
| Z | 120 | if len(param) == 2 { |
| 121 | blocks, size = param[0], param[1] | |
| 122 | // return nil, errors.New("shmServer created recv too much parameters") | |
| 123 | } | |
| 124 | ||
| 125 | time.Sleep(time.Millisecond) | |
| 25d8c3 | 126 | shm.Unlink(url) |
| Z | 127 | |
| 512af9 | 128 | rw, err := shm.CreateSimplex(url, 0644, blocks, size) |
| c2bbe3 | 129 | if err == nil { |
| e3c917 | 130 | fmt.Println(rw.Name()) |
| 9a89af | 131 | return &SHM{ |
| 20a4c4 | 132 | rw: rw, |
| Z | 133 | typ: agent, |
| c2bbe3 | 134 | }, nil |
| 9a89af | 135 | } |
| Z | 136 | |
| c2bbe3 | 137 | return nil, err |
| 9a89af | 138 | } |
| Z | 139 | |
| c2bbe3 | 140 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 141 | if m != Shm { |
| c2bbe3 | 142 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 143 | } |
| Z | 144 | |
| c2bbe3 | 145 | rw, err := shm.OpenSimplex(url) |
| Z | 146 | if err == nil { |
| 9a89af | 147 | return &SHM{ |
| 20a4c4 | 148 | rw: rw, |
| Z | 149 | typ: coactee, |
| c2bbe3 | 150 | }, nil |
| 9a89af | 151 | } |
| c2bbe3 | 152 | return nil, err |
| 9a89af | 153 | } |
