From: Timothy Byrd <byrd.timothy@...>
Date: 2005-08-31T09:11:24+09:00
Subject: Latest info on embedding Ruby in a C++ app

I'm looking for info on calling multiple Ruby scripts from inside a C++
application.  Is there anything like a definitive document about doing
this?

So far, I've googled the web and comp.lang.ruby, and I've looked at the
Pragmatic Guide.


As a test, I have:


int main(int argc, char** argv)
{
#ifdef WIN32
    NtInitialize(&argc, &argv);
#endif

    ruby_init();
    ruby_script("embedded");

    char* filename = 0;

    int status = 0;

    for (int i = 0; i < 3; ++i)
    {
        // [snip] do something to put the script path
        // into filename for this iteration.

//        rb_load_protect(rb_str_new2(filename), 0, &status);
        rb_load_file(filename);

//        if (status == 0)
//        {
            // [snip] set command arguments
            // and call ruby_set_argv()

            status = ruby_exec();
//        }
    }

    ruby_cleanup(status);

    return 0;
}

I know I need to wrap things in rb_protect() to save me from Ruby
crashing the whole application.  Are there any gotchas here?

How do I get the value of Kernel::exit once a Ruby script finishes?
ruby_exec() seems to only return 0 or 6.

If I am executing multiple scripts, should I just call ruby_init() once
at the beginning and ruby_cleanup() once at the end?

Thanks,

-- Timothy