Fiddle::Pointer#call_free

# File tmp/rubies/ruby-3.4.1/ext/fiddle/lib/fiddle/ffi_backend.rb, line 377
def call_free
  return if @free.nil?
  return if @freed
  if @free == RUBY_FREE
    LibC::FREE.call(@ffi_ptr)
  else
    @free.call(@ffi_ptr)
  end
  @freed = true
end