Ian Harding wrote:
> I have a mountain of code in TCL, and I am thinking of rewriting some of
> it in C.
>
> In a C module I have a function that is registered to an URL. Like I
> said, I have a bunch of TCL code that I would like to be able to use
> until (if ever) it gets rewritten.
>
> I see that I can execute TCL code and get a string back via
> Ns_TclEval(). It seems to work, but my first attempt, foolishly, was to
> use a utility TCL proc that returns a db handle. I can execute it, and I
> get the string that represents the name of the handle, but that's not
> exactly the same as a C Ns_DbHandle.
>
> Is there any way to share stuff like db handles back and forth like that?
The function to get a Ns_DbHandle from a handle name is
NS_EXTERN int Ns_TclDbGetHandle(Tcl_Interp *interp, char *handleId,
Ns_DbHandle **handle)
You still have to honor the db handle lifecycle (i.e., release it at the
end of a request) and sharing restrictions (don't share across threads)
when you're in C code.
> I saw some functions for sharing an Ns_Set, but that's about it.
>
> I would appreciate any pointers for this kind of thing... I am just
> getting started.
The header files in "include" are the definition of the public API. A
lot of the functions aren't well documented separately, but most are
documented in their source files. Using 'ctags' is helpful.
Why are you rewriting? If it's intended for performance, make sure you
are testing your performance and addressing the hotspots and not just
things that look like they might be slow.
There is an aolserver channel on freenode, it's quiet but there's
typically a few people there. Feel free to stop by.
Pretty basic pointers here, but they're all I have at the moment :)
-J
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