attrs(3pm) Perl Programmers Reference Guide attrs(3pm)
NAME
attrs - set/get attributes of a subroutine (deprecated)
SYNOPSIS
sub foo {
use attrs qw(locked method);
...
}
@a = attrs::get(\&foo);
DESCRIPTION
NOTE: Use of this pragma is deprecated. Use the syntax
sub foo : locked method { }
to declare attributes instead. See also attributes.
This pragma lets you set and get attributes for subroutines. Setting
attributes takes place at compile time; trying to set invalid attribute
names causes a compile-time error. Calling "attrs::get" on a subroutine
reference or name returns its list of attribute names. Notice that
"attrs::get" is not exported. Valid attributes are as follows.
method
Indicates that the invoking subroutine is a method.
locked
Setting this attribute is only meaningful when the subroutine or
method is to be called by multiple threads. When set on a method
subroutine (i.e. one marked with the method attribute above), perl
ensures that any invocation of it implicitly locks its first
argument before execution. When set on a non-method subroutine,
perl ensures that a lock is taken on the subroutine itself before
execution. The semantics of the lock are exactly those of one
explicitly taken with the "lock" operator immediately after the
subroutine is entered.
perl v5.10.0 2007-12-18 attrs(3pm)
Mac OS X 10.6 - Generated Thu Sep 17 20:18:32 CDT 2009