From 4f3bd6a122917eed4b5a5ead80a05ef9c143e395 Mon Sep 17 00:00:00 2001
From: zhangmeng <775834166@qq.com>
Date: 星期五, 30 八月 2019 16:12:20 +0800
Subject: [PATCH] test one data
---
shm.go | 99 +++++++++++++++++++++++++++----------------------
1 files changed, 55 insertions(+), 44 deletions(-)
diff --git a/shm.go b/shm.go
index 1eb9f56..0cc0bad 100644
--- a/shm.go
+++ b/shm.go
@@ -4,16 +4,19 @@
"errors"
"fmt"
"io"
-
+ "reflect"
"time"
+ "unsafe"
- "github.com/tmthrgd/shm-go"
+ "basic.com/valib/shm.git"
)
// SHM share memory
type SHM struct {
rw *shm.ReadWriteCloser
typ td
+
+ recvData []byte
}
// Send impl interface Diliver
@@ -22,26 +25,12 @@
return errors.New("please init shm producer first")
}
- ch := make(chan int)
- go func(){
- n, _ := s.rw.Write(data)
- ch <- n
- }()
- select{
- case <-ch:
- return nil
- case <- time.After(3 * time.Second):
- return errors.New("send time out")
+ n, err := s.rw.Write(data)
+ if n < 1 {
+ fmt.Println("recv data less than 1 length")
}
- return errors.New("send should't here")
-
- // n, err := s.rw.Write(data)
- // if n < 1 {
- // fmt.Println("recv data less than 1 length")
- // }
-
- // return err
+ return err
}
// Recv impl interface Diliver
@@ -51,33 +40,53 @@
return nil, errors.New("please open shm consumer first")
}
- ch := make(chan []byte)
- go func(){
- data := make([]byte, maxRecvSize)
- n, err := s.rw.Read(data)
- if err == nil || err == io.EOF {
- data = data[:n:n]
- }
- ch <- data
- }()
- select{
- case d := <-ch:
- return d, nil
- case <- time.After(3 * time.Second):
- return nil, errors.New("recv time out")
- }
-
- return nil, errors.New("recv should't here")
-
+ // orig
// data := make([]byte, maxRecvSize)
// n, err := s.rw.Read(data)
// if err == nil || err == io.EOF {
- // data = data[:n:n]
+ // data := data[:n:n]
// return data, nil
// }
- // return nil, err
+ // cur
+
+ // data, err := s.rw.DirectRead()
+ // if err == nil || err == io.EOF {
+ // return data, nil
+ // }
+
+ // new
+
+ if s.recvData == nil {
+ s.recvData = make([]byte, maxRecvSize)
+ }
+ sliceHeader := (*reflect.SliceHeader)(unsafe.Pointer(&s.recvData))
+ sliceHeader.Cap = maxRecvSize
+ sliceHeader.Len = 0
+
+ n, err := s.rw.Read(s.recvData)
+ if err == nil || err == io.EOF {
+ sliceHeader.Len = n
+ return s.recvData, nil
+ }
+
+ return nil, err
+}
+
+// Recv2 impl interface
+func (s *SHM) Recv2(data []byte) (int, error) {
+ if s == nil || s.rw == nil {
+ return 0, errors.New("please open shm consumer first")
+ }
+
+ n, err := s.rw.Read(data)
+ if err == nil || err == io.EOF {
+ data = data[:n:n]
+ return n, nil
+ }
+
+ return 0, err
}
// Close impl interface Deliver
@@ -114,14 +123,16 @@
blocks, size = param[0], param[1]
// return nil, errors.New("shmServer created recv too much parameters")
}
+
+ time.Sleep(time.Millisecond)
shm.Unlink(url)
rw, err := shm.CreateSimplex(url, 0644, blocks, size)
if err == nil {
fmt.Println(rw.Name())
return &SHM{
- rw,
- agent,
+ rw: rw,
+ typ: agent,
}, nil
}
@@ -136,8 +147,8 @@
rw, err := shm.OpenSimplex(url)
if err == nil {
return &SHM{
- rw,
- coactee,
+ rw: rw,
+ typ: coactee,
}, nil
}
return nil, err
--
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