Feature #4504: Add rb_funcall_passing_block to public API

• Status: Closed
• Assignee: -
• Target version: -

[quix (James M. Lawrence)]

=begin
rb_funcall2 fails to pass a block; rb_funcall_passing_block must be
used instead.

string.c needed it (http://redmine.ruby-lang.org/issues/show/3792),
and I need it as well.

=== test_relay.rb

require './relay'

module Relay
def self.target(*args, &block)
p block
end
end

Relay.with_funcall2 { }
Relay.with_funcall_passing_block { }

=== output

% ruby extconf.rb && make
% ruby -v test_relay.rb
ruby 1.9.2p180 (2011-02-18 revision 30907) [i386-darwin9.8.0]
nil
#Proc:0x4153c0@test_relay.rb:10

=== extconf.rb

require 'mkmf'
create_makefile('relay')

=== relay.c

#include "ruby.h"

VALUE
rb_funcall_passing_block(
VALUE recv, ID mid, int argc, const VALUE *argv) ;

static VALUE
with_funcall2(int argc, VALUE *argv, VALUE self)
{
return rb_funcall2(
self, rb_intern("target"), argc, argv) ;
}

static VALUE
with_funcall_passing_block(int argc, VALUE *argv, VALUE self)
{
return rb_funcall_passing_block(
self, rb_intern("target"), argc, argv) ;
}

VALUE cRelay ;

void
Init_relay()
{
cRelay = rb_define_module("Relay") ;

  rb_define_singleton_method(cRelay,
    "with_funcall2",
     with_funcall2,
    -1) ;
  rb_define_singleton_method(cRelay,
    "with_funcall_passing_block",
     with_funcall_passing_block,
    -1) ;

}

=== 1.9.3

Incidentally the symbol is not even accessible in 1.9.3.

% nm ruby-1.9.2/ruby | grep funcall_passing
00188220 T _rb_funcall_passing_block

% nm ruby-1.9-dev/ruby | grep funcall_passing
0018bef0 t _rb_funcall_passing_block

% make distclean && ruby19dev extconf.rb && make
% ruby19dev -v test_relay.rb
ruby 1.9.3dev (2011-03-14 trunk 31105) [i386-darwin9.8.0]
nil
dyld: lazy symbol binding failed: Symbol not found: _rb_funcall_passing_block
Referenced from: /Users/jlawrence/tmp/relay/relay.bundle
Expected in: flat namespace

dyld: Symbol not found: _rb_funcall_passing_block
Referenced from: /Users/jlawrence/tmp/relay/relay.bundle
Expected in: flat namespace

Trace/BPT trap

=end

[quix (James M. Lawrence)]

• File ruby.h.patch ruby.h.patch added

=begin

=end

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

=begin

=end