| 提交 | 用户 | age | ||
| 9a89af | 1 | package deliver |
| Z | 2 | |
| 3 | import ( | |
| 4 | "errors" | |
| 5 | "fmt" | |
| fb46ee | 6 | "io" |
| 4f3bd6 | 7 | "reflect" |
| 512af9 | 8 | "time" |
| 4f3bd6 | 9 | "unsafe" |
| 9a89af | 10 | |
| b8c958 | 11 | "basic.com/valib/shm.git" |
| 9a89af | 12 | ) |
| Z | 13 | |
| 14 | // SHM share memory | |
| 15 | type SHM struct { | |
| 93ff14 | 16 | rw *shm.ReadWriteCloser |
| Z | 17 | typ td |
| 4f3bd6 | 18 | |
| b9cf46 | 19 | recvData []byte |
| 9a89af | 20 | } |
| Z | 21 | |
| 22 | // Send impl interface Diliver | |
| 23 | func (s *SHM) Send(data []byte) error { | |
| c2bbe3 | 24 | if s == nil || s.rw == nil { |
| 9a89af | 25 | return errors.New("please init shm producer first") |
| Z | 26 | } |
| 27 | ||
| fb46ee | 28 | n, err := s.rw.Write(data) |
| Z | 29 | if n < 1 { |
| 30 | fmt.Println("recv data less than 1 length") | |
| 9a89af | 31 | } |
| Z | 32 | |
| fb46ee | 33 | return err |
| 9a89af | 34 | } |
| Z | 35 | |
| 36 | // Recv impl interface Diliver | |
| 37 | func (s *SHM) Recv() ([]byte, error) { | |
| 38 | ||
| c2bbe3 | 39 | if s == nil || s.rw == nil { |
| 9a89af | 40 | return nil, errors.New("please open shm consumer first") |
| Z | 41 | } |
| 42 | ||
| 4f3bd6 | 43 | // orig |
| Z | 44 | |
| 20a4c4 | 45 | // data := make([]byte, maxRecvSize) |
| Z | 46 | // n, err := s.rw.Read(data) |
| 47 | // if err == nil || err == io.EOF { | |
| 020e17 | 48 | // data := data[:n:n] |
| 20a4c4 | 49 | // return data, nil |
| Z | 50 | // } |
| 51 | ||
| 4f3bd6 | 52 | // cur |
| Z | 53 | |
| 54 | // data, err := s.rw.DirectRead() | |
| 55 | // if err == nil || err == io.EOF { | |
| 56 | // return data, nil | |
| 57 | // } | |
| 58 | ||
| 59 | // new | |
| 60 | ||
| 61 | if s.recvData == nil { | |
| 62 | s.recvData = make([]byte, maxRecvSize) | |
| 9a89af | 63 | } |
| b9cf46 | 64 | sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&s.recvData)) |
| f8dada | 65 | // sliceHeader.Cap = maxRecvSize |
| b9cf46 | 66 | sliceHeader.Len = maxRecvSize |
| 4f3bd6 | 67 | |
| Z | 68 | n, err := s.rw.Read(s.recvData) |
| 69 | if err == nil || err == io.EOF { | |
| b9cf46 | 70 | sliceHeader.Len = n |
| 4f3bd6 | 71 | return s.recvData, nil |
| Z | 72 | } |
| 73 | ||
| fb46ee | 74 | return nil, err |
| 9a89af | 75 | } |
| Z | 76 | |
| 020e17 | 77 | // Recv2 impl interface |
| 058b21 | 78 | func (s *SHM) Recv2(data []byte) (int, error) { |
| 020e17 | 79 | if s == nil || s.rw == nil { |
| 058b21 | 80 | return 0, errors.New("please open shm consumer first") |
| 020e17 | 81 | } |
| Z | 82 | |
| 83 | n, err := s.rw.Read(data) | |
| 84 | if err == nil || err == io.EOF { | |
| 85 | data = data[:n:n] | |
| 058b21 | 86 | return n, nil |
| 020e17 | 87 | } |
| Z | 88 | |
| 058b21 | 89 | return 0, err |
| 020e17 | 90 | } |
| Z | 91 | |
| 9a89af | 92 | // Close impl interface Deliver |
| Z | 93 | func (s *SHM) Close() { |
| c2bbe3 | 94 | if s == nil { |
| Z | 95 | return |
| 96 | } | |
| 9a89af | 97 | if s.rw != nil { |
| Z | 98 | s.rw.Close() |
| 99 | } | |
| 100 | if s.typ == agent { | |
| 101 | shm.Unlink(s.rw.Name()) | |
| 102 | } | |
| 103 | } | |
| 104 | ||
| c2bbe3 | 105 | func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 106 | if m != Shm { |
| c2bbe3 | 107 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 108 | } |
| Z | 109 | |
| 110 | var param []int | |
| 111 | for _, v := range args { | |
| 112 | switch v.(type) { | |
| 113 | case int: | |
| 114 | param = append(param, v.(int)) | |
| 115 | default: | |
| 116 | ||
| c2bbe3 | 117 | return nil, errors.New("shmServer created recv error parameters") |
| 9a89af | 118 | } |
| Z | 119 | } |
| fb46ee | 120 | |
| 512af9 | 121 | blocks, size := 2, maxRecvSize |
| Z | 122 | if len(param) == 2 { |
| 123 | blocks, size = param[0], param[1] | |
| 124 | // return nil, errors.New("shmServer created recv too much parameters") | |
| 125 | } | |
| 126 | ||
| 127 | time.Sleep(time.Millisecond) | |
| 25d8c3 | 128 | shm.Unlink(url) |
| Z | 129 | |
| 512af9 | 130 | rw, err := shm.CreateSimplex(url, 0644, blocks, size) |
| c2bbe3 | 131 | if err == nil { |
| e3c917 | 132 | fmt.Println(rw.Name()) |
| 9a89af | 133 | return &SHM{ |
| 20a4c4 | 134 | rw: rw, |
| Z | 135 | typ: agent, |
| c2bbe3 | 136 | }, nil |
| 9a89af | 137 | } |
| Z | 138 | |
| c2bbe3 | 139 | return nil, err |
| 9a89af | 140 | } |
| Z | 141 | |
| c2bbe3 | 142 | func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) { |
| 9a89af | 143 | if m != Shm { |
| c2bbe3 | 144 | return nil, errors.New("please use deliver.Shm mode") |
| 9a89af | 145 | } |
| Z | 146 | |
| c2bbe3 | 147 | rw, err := shm.OpenSimplex(url) |
| Z | 148 | if err == nil { |
| 9a89af | 149 | return &SHM{ |
| 20a4c4 | 150 | rw: rw, |
| Z | 151 | typ: coactee, |
| c2bbe3 | 152 | }, nil |
| 9a89af | 153 | } |
| c2bbe3 | 154 | return nil, err |
| 9a89af | 155 | } |
