use Module::Loaded; $bool = mark_as_loaded('Foo'); # Foo.pm is now marked as loaded $loc = is_loaded('Foo'); # location of Foo.pm set to the # loaders location eval "require 'Foo'"; # is now a no-op $bool = mark_as_unloaded('Foo'); # Foo.pm no longer marked as loaded eval "require 'Foo'"; # Will try to find Foo.pm in @INC