™.. attrs - Online Linux Manual Page
Section : 3pm
Updated : 2009-07-03
Source : perl v5.10.1
Note : Perl Programmers Reference Guide
NAMEattrs − set/get attributes of a subroutine (deprecated)
SYNOPSIS sub foo {
use attrs qw(locked method);
...
}
@a = attrs::get(\&foo);
DESCRIPTIONNOTE: 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 \*(C`attrs::get\*(C'\fR on a subroutine reference or name returns its list of attribute names. Notice that \*(C`attrs::get\*(C'\fR 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 \*(C`lock\*(C'\fR operator immediately after the subroutine is entered. 0
Johanes Gumabo
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