From: Robert Klemme <shortcutter@...>
Date: 2009-03-30T02:54:57+09:00
Subject: Re: Passing block in C

On 29.03.2009 18:23, Peter Zotov wrote:
> Quoting "Robert Klemme" <shortcutter@googlemail.com>:
> 
>> On 29.03.2009 17:58, Peter Zotov wrote:
>>> Quoting Phlip <phlip2005@gmail.com>:
>>>
>>>> Peter Zotov wrote:
>>>>
>>>>> How can I call Ruby function from C with block?
>>>>> E. g.
>>>>>
>>>>> VALUE block = rb_proc_new(...);
>>>>> rb_funcall_with_block(cMyClass, rb_intern("initialize"), 0, block);
>>>> Let me Google that for you!
>>>>
>>>>  http://www.google.com/codesearch?q=rb_proc_new
>>> Ehm. I meant 'what function must be in place of   
>>> rb_funcall_with_block'. I _know_ how do rb_proc_new work.
>> I think that Phlip understood this.  If you look at the results  
>> you'll find this
>>
>> http://www.google.com/codesearch/p?hl=de#X2brleciKjw/trunk/devel/RubyClass.cpp&q=rb_proc_new
>>
>> Which proves that his suggested search was indeed helpful. :-)
> 
> It isn't. See RubyDoc:
> 
> ObjectSpace.define_finalizer(obj, aProc=proc())
> Adds aProc as a finalizer, to be called after obj was destroyed.
> 
> Notice the aProc is an argument, not block.
> So that code is analogue for Ruby
>    method(object, proc { some_code })
> and I need
>    method(object) { some_code}

Right, stupid me.  Should have looked more closely.  My apologies for 
the unnecessary noise.

rb_iterate seems indeed the proper method:

http://www.ruby-doc.org/docs/ProgrammingRuby/html/ext_ruby.html#S8

Kind regards

	robert