From: Ryan Davis <ryand@...>
Date: 2002-09-11T08:12:00+09:00
Subject: Re: RubyInline 1.0.4 Released! (fwd)

On 2002-09-10T17:15:25, Pat Eyler wrote:
> From: Pat Eyler <pate@red-bean.com>
> To: ruby-talk ML <ruby-talk@ruby-lang.org>

> maybe someone would like to post a code sample of Inline::C from ruby?

Here is the snippet from example.rb:

  def fastfact(*args) 
    inline args, <<-END 
    int i, f=1; 
    for (i = FIX2INT(argv[0]); i >= 1; i--) { f = f * i; } 
    return INT2FIX(f); 
    END 
  end 

Basically, this is the body of the function you'd have to write if you
were to write a "real" extern. This gets extracted, compiled, linked
into a .so, required/loaded, and run in the first call to this
method. The second call to this method (in the same runtime) just runs
the optimized version. Another call in another runtime would jump to
the require/loaded stage unless the script had been edited since last
compile.