From: Peter Zotov <whitequark@...>
Date: 2009-03-30T03:57:21+09:00
Subject: Re: Passing block in C

Quoting "Robert Klemme" <shortcutter@googlemail.com>:

> 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

Yes, rb_iterate is exactly what I need.
Thanks for this ruby-doc link anyway... before I analyzed sources of  
every un-obvious function :)


   WBR, Peter Zotov