X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDevel%2FGlobalDestruction.pm;h=25b895881e2cd4f7a12ce3e62f89283c53ea7962;hb=23135b02f4a06a25ad3626ca40d8c171b379f25f;hp=5fe7e890d8b39bc4198c229348d20e725c646380;hpb=3790e928b4bd943715ef246f1b447190c3d162e1;p=p5sagit%2FDevel-GlobalDestruction.git

diff --git a/lib/Devel/GlobalDestruction.pm b/lib/Devel/GlobalDestruction.pm
index 5fe7e89..25b8958 100644
--- a/lib/Devel/GlobalDestruction.pm
+++ b/lib/Devel/GlobalDestruction.pm
@@ -1,49 +1,60 @@
-#!/usr/bin/perl
-
 package Devel::GlobalDestruction;
 
 use strict;
 use warnings;
 
-use XSLoader;
-
-our $VERSION = '0.02';
+our $VERSION = '0.09';
 
-use Sub::Exporter -setup => {
-	exports => [ qw(in_global_destruction) ],
-	groups  => { default => [ -all ] },
+use Sub::Exporter::Progressive -setup => {
+  exports => [ qw(in_global_destruction) ],
+  groups  => { default => [ -all ] },
 };
 
-if ($] >= 5.013007) {
-    eval 'sub in_global_destruction () { ${^GLOBAL_PHASE} eq q[DESTRUCT] }';
+# we run 5.14+ - everything is in core
+#
+if (defined ${^GLOBAL_PHASE}) {
+  eval 'sub in_global_destruction () { ${^GLOBAL_PHASE} eq q[DESTRUCT] }; 1'
+    or die $@;
+}
+# try to load the xs version if it was compiled
+#
+elsif (eval {
+  require XSLoader;
+  XSLoader::load(__PACKAGE__, $VERSION);
+  1;
+}) {
+  # the eval already installed everything, nothing to do
 }
 else {
-    XSLoader::load(__PACKAGE__, $VERSION);
+  # internally, PL_main_start is nulled immediately before entering global destruction
+  # and we can use B to detect that
+  require B;
+  eval 'sub in_global_destruction () { B::main_start()->isa(q[B::NULL]) }; 1'
+    or die $@;
 }
 
-__PACKAGE__
+1;  # keep require happy
 
-__END__
 
-=pod
+__END__
 
 =head1 NAME
 
-Devel::GlobalDestruction - Expose PL_dirty, the flag which marks global
+Devel::GlobalDestruction - Expose the flag which marks global
 destruction.
 
 =head1 SYNOPSIS
 
-	package Foo;
-	use Devel::GlobalDestruction;
+    package Foo;
+    use Devel::GlobalDestruction;
 
-	use namespace::clean; # to avoid having an "in_global_destruction" method
+    use namespace::clean; # to avoid having an "in_global_destruction" method
 
-	sub DESTROY {
-		return if in_global_destruction;
+    sub DESTROY {
+        return if in_global_destruction;
 
-		do_something_a_little_tricky();
-	}
+        do_something_a_little_tricky();
+    }
 
 =head1 DESCRIPTION
 
@@ -59,32 +70,37 @@ destruction is in effect.
 
 =head1 EXPORTS
 
-This module uses L<Sub::Exporter> so the exports may be renamed, aliased, etc.
+This module uses L<Sub::Exporter::Progressive> so the exports may be renamed,
+aliased, etc. if L<Sub::Exporter> is present.
 
 =over 4
 
 =item in_global_destruction
 
-Returns the current value of C<PL_dirty>.
+Returns true if the interpreter is in global destruction. In perl 5.14+, this
+returns C<${^GLOBAL_PHASE} eq 'DESTRUCT'>, and on earlier perls, it returns the
+current value of C<PL_dirty>.
 
 =back
 
-=head1 VERSION CONTROL
+=head1 AUTHORS
+
+Yuval Kogman E<lt>nothingmuch@woobling.orgE<gt>
 
-This module is maintained using Darcs. You can get the latest version from
-L<http://nothingmuch.woobling.org/code>, and use C<darcs send> to commit
-changes.
+Florian Ragwitz E<lt>rafl@debian.orgE<gt>
 
-=head1 AUTHOR
+Jesse Luehrs E<lt>doy@tozt.netE<gt>
 
-Yuval Kogman E<lt>nothingmuch@woobling.orgE<gt>
+Peter Rabbitson E<lt>ribasushi@cpan.orgE<gt>
 
-=head1 COPYRIGHT
+Arthur Axel 'fREW' Schmidt E<lt>frioux@gmail.comE<gt>
 
-	Copyright (c) 2008 Yuval Kogman. All rights reserved
-	This program is free software; you can redistribute
-	it and/or modify it under the same terms as Perl itself.
+Elizabeth Mattijsen E<lt>liz@dijkmat.nlE<gt>
 
-=cut
+=head1 COPYRIGHT
 
+    Copyright (c) 2008 Yuval Kogman. All rights reserved
+    This program is free software; you can redistribute
+    it and/or modify it under the same terms as Perl itself.
 
+=cut