From: Alvin Schur <schur@...>
Date: 2004-07-15T03:59:58+09:00
Subject: Re: Bug in OpenGL module (Re: [Bug] Ruby 1.8.1 and 1.9: interactions between extensions: opengl and imlib2)


Many thanks for the quick reply and patch.  

I see invoking ObjectSpace.garbage_collect highlights the problem as well.

Alvin.

On July 14, 2004 02:55 am, nobu.nokada@softhome.net wrote:
> Hi,
>
> At Wed, 14 Jul 2004 12:39:13 +0900,
>
> Alvin Schur wrote in [ruby-core:03189]:
> > I am trying to use the opengl and imlib2 extensions with Ruby 1.8.1 and
> > 1.9. The program listed below causes a segfault in both versions of Ruby.
> >  The backtrace at the end of the email is for Ruby 1.9.  The interesting
> > lines are:
> >
> > def init_timer_fails
> >   GLUT.TimerFunc(100, handle_timer, 34)
> > end
>
> It's a bug in rbogl, imlib2 isn't concerned with the SEGV
> directly.  rbogl has to mark timer_func etc. while GC.
>
> 
> --- extconf.rb~	2003-08-17 12:04:32.000000000 +0900
> +++ extconf.rb	2004-07-14 15:47:02.000000000 +0900
> @@ -20,5 +20,6 @@ File.unlink("Makefile.glut") if (FileTes
>  header = nil
>
> -if (/cygwin/ =~ PLATFORM)
> +case RUBY_PLATFORM
> +when /cygwin/
>    $CFLAGS="-DWIN32"
>    gl_libname = "opengl32"
> @@ -26,5 +27,5 @@ if (/cygwin/ =~ PLATFORM)
>    glut_libname = "glut32"
>    header=["GL/gl.h", "GL/glu.h", "GL/glut.h"]
> -elsif (/mswin32/ =~ PLATFORM)
> +when /mswin32/
>    $CFLAGS="-DWIN32"
>    gl_libname = "opengl32"
> --- glut.c~	2004-07-11 00:47:34.000000000 +0900
> +++ glut.c	2004-07-14 15:50:14.000000000 +0900
> @@ -1501,13 +1501,13 @@ Init_glut()
>      rb_define_const(mGLUT, "CURSOR_FULL_CROSSHAIR",
> INT2NUM(GLUT_CURSOR_FULL_CROSSHAIR));
>
> -    rb_define_const(mGLUT, "BITMAP_9_BY_15",
> INT2NUM(GLUT_BITMAP_9_BY_15)); -    rb_define_const(mGLUT,
> "BITMAP_8_BY_13", INT2NUM(GLUT_BITMAP_8_BY_13)); -   
> rb_define_const(mGLUT, "BITMAP_TIMES_ROMAN_10",
> INT2NUM(GLUT_BITMAP_TIMES_ROMAN_10)); -    rb_define_const(mGLUT,
> "BITMAP_TIMES_ROMAN_24", INT2NUM(GLUT_BITMAP_TIMES_ROMAN_24)); -   
> rb_define_const(mGLUT, "BITMAP_HELVETICA_10",
> INT2NUM(GLUT_BITMAP_HELVETICA_10)); -    rb_define_const(mGLUT,
> "BITMAP_HELVETICA_12", INT2NUM(GLUT_BITMAP_HELVETICA_12)); -   
> rb_define_const(mGLUT, "BITMAP_HELVETICA_18",
> INT2NUM(GLUT_BITMAP_HELVETICA_18)); -    rb_define_const(mGLUT,
> "STROKE_ROMAN", INT2NUM(GLUT_STROKE_ROMAN)); -    rb_define_const(mGLUT,
> "STROKE_MONO_ROMAN", INT2NUM(GLUT_STROKE_MONO_ROMAN)); +   
> rb_define_const(mGLUT, "BITMAP_9_BY_15",
> INT2NUM((VALUE)GLUT_BITMAP_9_BY_15)); +    rb_define_const(mGLUT,
> "BITMAP_8_BY_13", INT2NUM((VALUE)GLUT_BITMAP_8_BY_13)); +   
> rb_define_const(mGLUT, "BITMAP_TIMES_ROMAN_10",
> INT2NUM((VALUE)GLUT_BITMAP_TIMES_ROMAN_10)); +    rb_define_const(mGLUT,
> "BITMAP_TIMES_ROMAN_24", INT2NUM((VALUE)GLUT_BITMAP_TIMES_ROMAN_24)); +   
> rb_define_const(mGLUT, "BITMAP_HELVETICA_10",
> INT2NUM((VALUE)GLUT_BITMAP_HELVETICA_10)); +    rb_define_const(mGLUT,
> "BITMAP_HELVETICA_12", INT2NUM((VALUE)GLUT_BITMAP_HELVETICA_12)); +   
> rb_define_const(mGLUT, "BITMAP_HELVETICA_18",
> INT2NUM((VALUE)GLUT_BITMAP_HELVETICA_18)); +    rb_define_const(mGLUT,
> "STROKE_ROMAN", INT2NUM((VALUE)GLUT_STROKE_ROMAN)); +   
> rb_define_const(mGLUT, "STROKE_MONO_ROMAN",
> INT2NUM((VALUE)GLUT_STROKE_MONO_ROMAN));
>
>      callId = rb_intern("call");
> @@ -1539,4 +1539,8 @@ Init_glut()
>      WINDOW_CALLBACK_DEFINE(OverlayDisplayFunc);
>      WINDOW_CALLBACK_DEFINE(WindowStatusFunc);
> +
> +    rb_gc_register_address(&idle_func);
> +    rb_gc_register_address(&timer_func);
> +    rb_gc_register_address(&menustate_func);
>  }
>
>