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Re: CNI byte array
- To: Shu-Fang Chen <shuchen at nortelnetworks dot com>
- Subject: Re: CNI byte array
- From: "Rolf W. Rasmussen" <rolfwr at ii dot uib dot no>
- Date: Fri, 2 Mar 2001 00:27:54 +0100
- Cc: "'java-discuss at sourceware dot cygnus dot com'" <java-discuss at sourceware dot cygnus dot com>
- References: <52F74DDA50B5D211AF800000F808252105D374D6@zrchb212.us.nortel.com>
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.