summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tlperl0/lib/attrs.pm
diff options
context:
space:
mode:
Diffstat (limited to 'Master/tlpkg/tlperl0/lib/attrs.pm')
-rwxr-xr-xMaster/tlpkg/tlperl0/lib/attrs.pm58
1 files changed, 58 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl0/lib/attrs.pm b/Master/tlpkg/tlperl0/lib/attrs.pm
new file mode 100755
index 00000000000..3c00f61328e
--- /dev/null
+++ b/Master/tlpkg/tlperl0/lib/attrs.pm
@@ -0,0 +1,58 @@
+package attrs;
+use XSLoader ();
+
+$VERSION = "1.03";
+
+=head1 NAME
+
+attrs - set/get attributes of a subroutine (deprecated)
+
+=head1 SYNOPSIS
+
+ sub foo {
+ use attrs qw(locked method);
+ ...
+ }
+
+ @a = attrs::get(\&foo);
+
+=head1 DESCRIPTION
+
+NOTE: Use of this pragma is deprecated. Use the syntax
+
+ sub foo : locked method { }
+
+to declare attributes instead. See also L<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> on a subroutine reference or name returns its list
+of attribute names. Notice that C<attrs::get> is not exported.
+Valid attributes are as follows.
+
+=over 4
+
+=item method
+
+Indicates that the invoking subroutine is a method.
+
+=item 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 B<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> operator immediately after the
+subroutine is entered.
+
+=back
+
+=cut
+
+XSLoader::load 'attrs', $VERSION;
+
+1;