From: "Darryl L. Pierce" <mcpierce@...>
Date: 2012-04-19T01:53:04+09:00
Subject: Re: C extension: How to get a block passed to a method?

On Wed, Apr 18, 2012 at 12:34 PM, Iņaki Baz Castillo <ibc@aliax.net> wrote:
<snip>

If I understand your question correctly, you're asking how to invoke a
block that's passed into a method written as a native extension. Is
that correct?

In a Ruby extension written in C, you would use something like this:

// if a block was passed to this method then invoke it
if(rb_block_given_p())
  {
    rb_yield(/* args */);
  }

rb_block_given_p() returns true if a code block was passed into the
method being processed. And rb_yield invokes that block with the
provided arguments (you can pass 0 or more args to the rb_yield).

HTH.

-- 
Darryl L. Pierce <mcpierce@gmail.com>
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