C-style reference counting and *_destroy() functions are not implemented in R

All memory and reference counting functions are currently empty. The R garbage collector is used to clean-up at the end of object lifetimes

cairo_destroy(...)

cairo_reference(...)

cairo_get_reference_count(...)

cairo_surface_destroy(...)

cairo_surface_reference(...)

cairo_surface_get_reference_count(...)

cairo_device_destroy(...)

cairo_device_reference(...)

cairo_device_get_reference_count(...)

cairo_pattern_destroy(...)

cairo_pattern_reference(...)

cairo_pattern_get_reference_count(...)

cairo_scaled_font_destroy(...)

cairo_scaled_font_reference(...)

cairo_scaled_font_get_reference_count(...)

cairo_font_face_destroy(...)

cairo_font_face_reference(...)

cairo_font_face_get_reference_count(...)

cairo_rectangle_list_destroy(...)

cairo_region_destroy(...)

cairo_region_reference(...)

cairo_font_options_destroy(...)

cairo_path_destroy(...)

Arguments

...	all arguments ignored