Re: How to correctly determine a small object?

[Chan Maxthon]

I am sort of looking into the concept of running Objective-C in a kernel of an operating system, which would require implementing a (partial) libobjc2 and Foundation that can run on bare metal. Since all my develop machines have clang I can exchange compiled object files in LLVM bitcode and only the linking would ask for a Linux box. This is why I am asking this question.

发自我的 iPhone

在 2013-6-9，5:15，Ivan Vučica <address@hidden> 写道：

On Sat, Jun 8, 2013 at 9:55 PM, Chan Maxthon <address@hidden> wrote:

I am expecting a solution that works on both OS X and GNUstep.

Why?

This is an implementation detail which can differ on OS X and GNUstep. As far as I understand it, it's only needed inside CoreBase/Core Foundation. Why would you need to even determine if something is a small pointer in another library?

Luboš can correct me if I'm wrong, but you don't need to know whether the pointer is a "small object" outside very small amount of runtime code and toll-free bridging-related code, which will be implemented in core GNUstep libraries; and for any binary compatibility you will not and should not need to know this implementation detail about the kind of object that is stored in a pointer.

Right? :-)

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Ivan Vučica - address@hidden