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| package deliver
|
| import (
| "errors"
| "fmt"
| "io"
|
| "basic.com/valib/shm.git"
| )
|
| // SHM share memory
| type SHM struct {
| rw *shm.ReadWriteCloser
| typ td
| }
|
| // Send impl interface Diliver
| func (s *SHM) Send(data []byte) error {
| if s == nil || s.rw == nil {
| return errors.New("please init shm producer first")
| }
|
| n, err := s.rw.Write(data)
| if n < 1 {
| fmt.Println("recv data less than 1 length")
| }
|
| return err
| }
|
| // Recv impl interface Diliver
| func (s *SHM) Recv() ([]byte, error) {
|
| if s == nil || s.rw == nil {
| return nil, errors.New("please open shm consumer first")
| }
|
| data := make([]byte, maxRecvSize)
| n, err := s.rw.Read(data)
| if err == nil || err == io.EOF {
| data = data[:n:n]
| return data, nil
| }
|
| return nil, err
| }
|
| // Close impl interface Deliver
| func (s *SHM) Close() {
| if s == nil {
| return
| }
| if s.rw != nil {
| s.rw.Close()
| }
| if s.typ == agent {
| shm.Unlink(s.rw.Name())
| }
| }
|
| func shmServer(m Mode, url string, args ...interface{}) (*SHM, error) {
| if m != Shm {
| return nil, errors.New("please use deliver.Shm mode")
| }
|
| var param []int
| for _, v := range args {
| switch v.(type) {
| case int:
| param = append(param, v.(int))
| default:
|
| return nil, errors.New("shmServer created recv error parameters")
| }
| }
| if len(param) != 2 {
| return nil, errors.New("shmServer created recv too much parameters")
| }
|
| shm.Unlink(url)
|
| rw, err := shm.CreateSimplex(url, 0644, param[0], param[1])
| if err == nil {
| fmt.Println(rw.Name())
| return &SHM{
| rw,
| agent,
| }, nil
| }
|
| return nil, err
| }
|
| func shmClient(m Mode, url string, args ...interface{}) (*SHM, error) {
| if m != Shm {
| return nil, errors.New("please use deliver.Shm mode")
| }
|
| rw, err := shm.OpenSimplex(url)
| if err == nil {
| return &SHM{
| rw,
| coactee,
| }, nil
| }
| return nil, err
| }
|
|
