From 43e52a52e24ad4fd00d351b21259b9a76affbaed Mon Sep 17 00:00:00 2001
From: 554325746@qq.com <554325746@qq.com>
Date: 星期四, 22 八月 2019 14:40:06 +0800
Subject: [PATCH] memleak bug fix

---
 shm.go |   71 ++++++++++++++++++++++++++++-------
 1 files changed, 56 insertions(+), 15 deletions(-)

diff --git a/shm.go b/shm.go
index fcdc76b..7899793 100644
--- a/shm.go
+++ b/shm.go
@@ -5,6 +5,8 @@
 	"fmt"
 	"io"
 
+	"time"
+
 	"github.com/tmthrgd/shm-go"
 )
 
@@ -12,6 +14,8 @@
 type SHM struct {
 	rw  *shm.ReadWriteCloser
 	typ td
+
+	data []byte
 }
 
 // Send impl interface Diliver
@@ -20,12 +24,26 @@
 		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")
+	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")
 	}
 
-	return err
+	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
 }
 
 // Recv impl interface Diliver
@@ -35,14 +53,32 @@
 		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
+	ch := make(chan []byte)
+	go func(){
+		n, err := s.rw.Read(s.data)
+		if err == nil || err == io.EOF {
+			s.data = s.data[:n:n]
+		}
+		ch <- s.data
+	}()
+	select{
+	case d := <-ch:
+		return d, nil
+	case <- time.After(3 * time.Second):
+		return nil, errors.New("recv time out")
 	}
 
-	return nil, err
+	return nil, errors.New("recv should't here")
+
+
+	// 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
@@ -65,7 +101,6 @@
 
 	var param []int
 	for _, v := range args {
-		fmt.Println(v)
 		switch v.(type) {
 		case int:
 			param = append(param, v.(int))
@@ -74,16 +109,21 @@
 			return nil, errors.New("shmServer created recv error parameters")
 		}
 	}
-	if len(param) != 2 {
-		return nil, errors.New("shmServer created recv too much parameters")
-	}
 
-	rw, err := shm.CreateSimplex(url, 0644, param[0], param[1])
+	blocks, size := 2, maxRecvSize
+	if len(param) == 2 {
+		blocks, size = param[0], param[1]
+		// return nil, errors.New("shmServer created recv too much parameters")
+	}
+	shm.Unlink(url)
+
+	rw, err := shm.CreateSimplex(url, 0644, blocks, size)
 	if err == nil {
 		fmt.Println(rw.Name())
 		return &SHM{
 			rw,
 			agent,
+			make([]byte, maxRecvSize),
 		}, nil
 	}
 
@@ -100,6 +140,7 @@
 		return &SHM{
 			rw,
 			coactee,
+			make([]byte, maxRecvSize),
 		}, nil
 	}
 	return nil, err

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