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<HTML>
<HEAD>
<TITLE>attrs - set/get attributes of a subroutine</TITLE>
<LINK REL="stylesheet" HREF="../Active.css" TYPE="text/css">
<LINK REV="made" HREF="mailto:">
</HEAD>
<BODY>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%>
<TR><TD CLASS=block VALIGN=MIDDLE WIDTH=100% BGCOLOR="#cccccc">
<STRONG><P CLASS=block> attrs - set/get attributes of a subroutine</P></STRONG>
</TD></TR>
</TABLE>
<A NAME="__index__"></A>
<!-- INDEX BEGIN -->
<UL>
<LI><A HREF="#name">NAME</A></LI><LI><A HREF="#supportedplatforms">SUPPORTED PLATFORMS</A></LI>
<LI><A HREF="#synopsis">SYNOPSIS</A></LI>
<LI><A HREF="#description">DESCRIPTION</A></LI>
</UL>
<!-- INDEX END -->
<HR>
<P>
<H1><A NAME="name">NAME</A></H1>
<P>attrs - set/get attributes of a subroutine (deprecated)</P>
<P>
<HR>
<H1><A NAME="supportedplatforms">SUPPORTED PLATFORMS</A></H1>
<UL>
<LI>Linux</LI>
<LI>Solaris</LI>
<LI>Windows</LI>
</UL>
<HR>
<H1><A NAME="synopsis">SYNOPSIS</A></H1>
<PRE>
sub foo {
use attrs qw(locked method);
...
}</PRE>
<PRE>
@a = attrs::get(\&foo);</PRE>
<P>
<HR>
<H1><A NAME="description">DESCRIPTION</A></H1>
<P>NOTE: Use of this pragma is deprecated. Use the syntax</P>
<PRE>
sub foo : locked method { }</PRE>
<P>to declare attributes instead. See also <A HREF="../lib/attributes.html">the attributes manpage</A>.</P>
<P>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
<CODE>attrs::get</CODE> on a subroutine reference or name returns its list
of attribute names. Notice that <CODE>attrs::get</CODE> is not exported.
Valid attributes are as follows.</P>
<DL>
<DT><STRONG><A NAME="item_method">method</A></STRONG><BR>
<DD>
Indicates that the invoking subroutine is a method.
<P></P>
<DT><STRONG><A NAME="item_locked">locked</A></STRONG><BR>
<DD>
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 <STRONG>method</STRONG> 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 <A HREF="../lib/Pod/perlfunc.html#item_lock"><CODE>lock</CODE></A> operator immediately after the
subroutine is entered.
<P></P></DL>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%>
<TR><TD CLASS=block VALIGN=MIDDLE WIDTH=100% BGCOLOR="#cccccc">
<STRONG><P CLASS=block> attrs - set/get attributes of a subroutine</P></STRONG>
</TD></TR>
</TABLE>
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</HTML>