From: Tonyryu Tonyryu <tony_ryu@...>
Date: 2008-02-29T03:47:06+09:00
Subject: Ruby C++ extend, prb with free object

Sorry for my bad english.

I try to create an extention of interpreter ruby, with new class and
module. But when i test my code, the object is never destruct before
program's ending. Maybe the garbage collector is disable or other, i
don't know.

My simple code C++ :

------------------------------------------------------------------------
#include <iostream.h>
#include "ruby.h"

// Class C++ Color
class Color
{
 private:
  int test;

 public:
  Color();
  ~Color();
  void proc_test();
  void init();
};

Color::Color()
{
  std::cout << "constructeur\n" ;
}

Color::~Color()
{
  std::cout << "destructeur\n" ;
}

void Color::proc_test()
{
  std::cout << "test\n" ;
}

void Color::init()
{
  std::cout << "init\n" ;
}

/*********************************************/

static void rb_color_free( Color *objColor )
{
    std::cout << "rb_color_free: enter\n";
    delete objColor;
    std::cout << "rb_color_free: leave\n";
}

static VALUE rb_color_new( VALUE self )
{
    Color *objColor = new Color();
    return Data_Wrap_Struct(self, 0, rb_color_free, objColor);
}

static VALUE rb_color_init( VALUE self )
{
    Color *objColor;
    Data_Get_Struct(self, Color, objColor);
    objColor->init();
    return self;
}

static VALUE rb_color_test(VALUE self)
{
  Color *objColor;
  Data_Get_Struct (self, Color, objColor);
  objColor->proc_test();
}

VALUE   cColor;

void init_color()
{

    cColor = rb_define_class( "Color", rb_cObject );

    rb_define_alloc_func(cColor, rb_color_new);
    rb_define_method( cColor, "initialize", (VALUE (*)(...)
)rb_color_init, 0 );
    rb_define_method( cColor, "essai", (VALUE (*)(...) )rb_color_test, 0
);
}


int main( int argc, char *argv[] ) {

  // Init ruby environment
  ruby_init();
  ruby_script("embedded");
  ruby_init_loadpath();

  // Load my class Color definition
  init_color();

  rb_load_file("test.rb");
  ruby_run();

  return 0;
}
------------------------------------------------------------------------

And the script 'test.rb' :

------------------------------------------------------------------------
def test
  maCouleur = Color.new()
  maCouleur.essai
end

test()
maCouleur = Color.new()
------------------------------------------------------------------------

result :

------------------------------------------------------------------------
constructeur
init
test
constructeur
init
rb_color_free: enter
destructeur
rb_color_free: leave
rb_color_free: enter
destructeur
rb_color_free: leave
------------------------------------------------------------------------


Why my class's object are free at the end of program?
-- 
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