Passing block in C

[Peter Zotov]

Hi.

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);

WBR, Peter Zotov

 

[Phlip]

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

 

[Peter Zotov]

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.

WBR, Peter Zotov

 

[Robert Klemme]

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.

Cheers

robert

 

[Peter Zotov]

I think that Phlip understood this. If you look at the results =20
you'll find this

http://www.google.com/codesearch/p?hl=3Dde#X2brleciKjw/trunk/devel/RubyCla= ss.cpp&q=3Drb_proc_new

Which proves that his suggested search was indeed helpful.

It isn't. See RubyDoc:

ObjectSpace.define_finalizer(obj, aProc=3Dproc())
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}

WBR, Peter Zotov

 

[Andre Nathan]

Hi Peter,

Hi.

How can I call Ruby function from C with block?

You can use rb_iterate():

static VALUE
foo_i(VALUE x, VALUE dummy)
{
rb_p(x);
return Qnil;
}

static VALUE
rb_foo(VALUE self)
{
rb_yield(INT2FIX(42));
return Qnil;
}

static VALUE
call_foo(VALUE klass)
{
return rb_funcall(klass, rb_intern("foo"), 0);
}

void
Init_myclass(void)
{
VALUE klass = rb_define_class("MyClass", rb_cObject);
rb_define_singleton_method(klass, "foo", rb_foo, 0);
rb_iterate(call_foo, klass, foo_i, (VALUE)NULL);
}

Best,
Andre

 

[Phlip]

I think that Phlip understood this.

Actually I didn't. I was just having a "let me Google CodeSearch that for you"
moment... (-:

 

[Robert Klemme]

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

 

[Peter Zotov]

Right, stupid me. Should have looked more closely. My apologies =20
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 =20
every un-obvious function


WBR, Peter Zotov