go dll char* memcpy

  

   

    

     

    
    

     

         dll := syscall.MustLoadDLL("hik_client.dll")
     
    
   

    

     

    
    

     

       callback := syscall.NewCallback(func(r uintptr, size int) (ret uintptr) {
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     
 // 定义一个[]byte切片，用来存储C返回的字符串
     
    
   

    

     

    
    

     

       data := make([]byte,size)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       C.memcpy(unsafe.Pointer(&data[0]), unsafe.Pointer(r), C.size_t(size))
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       err := conn.ws.WriteMessage(2,  data)
     
    
   

    

     

    
    

     
 if err != nil {
     
    
   

    

     

    
    

     

       fmt.Printf("conn.WriteMessage ERROR!!!\n")
     
    
   

    

     

    
    

     

       }
     
    
   

    

     

    
    

     

       runtime.Gosched()
     
    
   

    

     

    
    

     
 return 0
     
    
   

    

     

    
    

     

       })
     
    
   

    

     

    
    

     
 var filename string
     
    
   

    

     

    
    

     

       filename = "rtsp://admin:sbdwl123@192.168.25.45:554/h264/ch1/main/av_stream"
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

       procGreet := dll.MustFindProc("byte_url")
     
    
   

    

     

    
    

     

       procGreet.Call(uintptr(unsafe.Pointer(syscall.StringBytePtr(filename))), callback)
     
    
  
 

文章来源: blog.csdn.net，作者：网奇，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/jacke121/article/details/88416607