8 attrs - set/get attributes of a subroutine (deprecated)
13 use attrs qw(locked method);
17 @a = attrs::get(\&foo);
21 NOTE: Use of this pragma is deprecated. Use the syntax
23 sub foo : locked method { }
25 to declare attributes instead. See also L<attributes>.
27 This pragma lets you set and get attributes for subroutines.
28 Setting attributes takes place at compile time; trying to set
29 invalid attribute names causes a compile-time error. Calling
30 C<attrs::get> on a subroutine reference or name returns its list
31 of attribute names. Notice that C<attrs::get> is not exported.
32 Valid attributes are as follows.
38 Indicates that the invoking subroutine is a method.
42 Setting this attribute is only meaningful when the subroutine or
43 method is to be called by multiple threads. When set on a method
44 subroutine (i.e. one marked with the B<method> attribute above),
45 perl ensures that any invocation of it implicitly locks its first
46 argument before execution. When set on a non-method subroutine,
47 perl ensures that a lock is taken on the subroutine itself before
48 execution. The semantics of the lock are exactly those of one
49 explicitly taken with the C<lock> operator immediately after the
50 subroutine is entered.
56 XSLoader::load 'attrs', $VERSION;