Index for Section 3

Alphabetical listing for A

Bottom of page

attrs(3)
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 the attributes manpage.

  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.

Index for Section 3

Alphabetical listing for A

Top of page