CNI byte array

Rolf W. Rasmussen rolfwr@ii.uib.no
Thu Mar 1 15:28:00 GMT 2001


On Thu, Mar 01, 2001 at 02:23:03PM -0600, Shu-Fang Chen wrote:
>[...] 
> I am working on a project using Cygnus Native Interface. I would like to
> send a message (which is a byte array) from C back to Java. Then, I need to
> create a object of JArrayByte (jbyteArray CNI_ArrayPtr =
> JvNewByteArray(ArrayLength);) and copy the content in the C byte array to
> the JArrayByte object (memcpy(elements(CNI_ArrayPtr), C_ArrayPtr,
> ArrayLength);).  It would take much more time and memory if the message
> traffic is heavy. If I could access the field "data" in class JArray, the
> problem would be solved. Unfortunately, it's a private field.  

Use the friend function 
	template<class T> inline T* elements(JArray<T>& x);

-- 
Rolf W. Rasmussen                              "Printer friendly format"?
                                                     I must be a printer.



More information about the Java mailing list