Interface method inlining

Question

hi
I'm not sure, if this is the right forum to post to. Please move this thread to the correct one, if it is not.
Here is my question:
I want to write an "OpenGL wrapper-wrapper", that allows an abstract access to JOGL, LWJGL, etc. (for now only the two). This is only possible through an interface. In an OpenGL application there are many, many small calls to many OpenGL commands. So, if these methods are not inlined, the whole wrapper-wrapper doesn't make much sense.
I could not find any clear documentation about it. Are such methods inlined by the JIT compiler? I'm using Java 1.5 and 1.6. I know, this question cannot be answered generally. But all these methods will look similar to these ones:
Interface:
public void glDoSomething(int foo, FloatBuffer bar);
public void glDoSomethingElse(int foo);
public void glEnable(int state);
public void glDisable(int state);(e.g.) JOGL implementaion
public void glDoSomething(int foo, FloatBuffer bar)
     // invoke the JOGL method in this implementation
    gl.glDoSomething( foo, bar );
public void glDoSomethingElse(int foo)
     // invoke the JOGL method in this implementation
    gl.glDoSomethingElse( foo );
public void glEnable(int state)
     // invoke the JOGL method in this implementation
    if (!gl_states[ state ] )
        gl.glEnable( gl_const_map[ state ] );
        gl_states[ state ] = true;
public void glDisable(int state)
    if (gl_states[ state ] )
         // invoke the JOGL method in this implementation
        gl.glDisable( gl_const_map[ state ] );
        gl_states[ state ] = false;
}Would this be inlined by Java 1.5 and/or Java 1.6? Is there any good documentation about this problematic? Is there any way to ask the VM about it?
Any help is very appreciated.
Marvin

Answer 1

Well, the JIT compiler only inlines actual code. So you can't tell from an
interface definition whether it will decide to inline an implementation of a
method or not.Well, that's exactly, what my initial question was aiming at. I do know, that the implementing method is simple enough to be inlined. I just wanted to know, if the JIT compiler is even able to inline such code, that just implementes an interface. Is there any clear documentation about it?
No, you're right. Why would the fact that interesting or annoying questions get replies lead you to think otherwise? The volunteers here answer whatever questions they feel like answering. If nobody finds yours interesting enough or konws enough about it to answer it, it may go untouched. Or maybe the handful of people who would be interested/qualified just didn't see it before others' questions came in and pushed it down the list. If you don't get an answer after several hours or a day, a polite bump just to push it back to the forefront is fine. Just don't get too impatient or people will start getting irritated and be more inclined to flame your for your bad manners than to help you.
I'm very sorry, if I said anthing offending. Sometimes I do, even if I didn't want to. I was just wondering, if this forum actually makes sense in this way, if too few people are here, who answer questions. Believe me, when I say, that I do know, that it is (or can be) a hard job to keep track of all requests in a forum or even in a complete board. I will always be greatful for anybody, who takes up this work.
But I am convinced, that my question is an interesting one not only for me. So I was wondering, how such a forum could ever fullfill its role, if quesions like this get flooded down to page 10 in such a short time. Many questions will stay unanswered, if they would need to be recognized in minutes to not get flooded on pages, where noone will ever look again for them.
And further belive me, that this is not to be offending in any way. I just wanted to explain, why I was so shocked, that I wrote something like the above. Sorry, if this was misunderstandable.
I could be wrong but I believe this already exists.I would be highly interested, if you could point me to where it already exists.
Thanks.
Marvin