If the perl bindings introduce an explicit close API, it will no longer be safe to rely on object destruction to call cleanup code. For example, if a program creates a temporary directory which must persist for the duration of the program but must be cleaned up prior to exit, the program cannot rely on a destructor to do the cleanup as the handle may have been closed before the destructor is executed.

A solution to this would be to allow callbacks to be registered and executed immediately prior to close(). For example:

$g->pre_close(sub {
  $g->rmdir($self->{foo});
});