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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.









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Created 1996-2024 by Maxim Chirkov

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