JNA - problems with pointers

Question

Hi!
At the moment I'm experimenting with the Java Native Access (JNA) library. I have a DLL file written in C and I want to create its wrapper class in Java. Here is the simplified version of the C code:
typedef struct {
} my_struct;
my_struct my_struct_array[ITEM_COUNT];
int my_func(my_struct **items) {
    *items = my_struct_array;
    return 0;
}I don't know how to make the Java representation of the my_func() function. I've tried to translate the argument type to Java in the following ways:
1. my_struct **items -> MyStruct[]
2. my_struct **items -> MyStruct.ByReference[]
3. my_struct **items -> MyStruct.ByValue[]
None of them works...
Thank you for your help!
Edited by: Tomi1226 on Apr 3, 2010 6:38 AM

Answer 1

JNA = java native access
[https://jna.dev.java.net/]
It is a wrapper over JNI intended to make JNI "easier". Myself I doubt that assertion since one would need a firm understanding of the basics of pointers and data types in C/C++ in the first place and then one must also understand how JNA wraps those. And on top of that one must also contend with the often expected gain of JNI in performance versus the dynamic thunking in JNA.
At any rate since it is a wrapper and not part of the Java API it has its own forum.
[https://jna.dev.java.net/#community]
It is there one is most likely to find answers about it. If any help existed on this site it would be most likely to show up in the JNI forum. From my experience it isn't likely.
None of them works...You have a pointer to an array. However that work in JNA.