From: Peter Rabbitson <ribasushi@cpan.org>
Date: Wed, 8 Aug 2012 20:00:42 +0000 (+0200)
Subject: Fix pure-perl implementation incorrectly reporting GD during END phase (liz++)
X-Git-Tag: Devel-GlobalDestruction-0.09~4
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=140a3884a09b85a2f4c988ffea726455e194066d;p=p5sagit%2FDevel-GlobalDestruction.git

Fix pure-perl implementation incorrectly reporting GD during END phase (liz++)
---

diff --git a/Changes b/Changes
index a5eeb6a..61e40bb 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,5 @@
+  * Fix pure-perl implementation incorrectly reporting GD during END phase
+
 0.08  Tue, 31 Jul 2012
   * Switch to Sub::Exporter::Progressive
 
diff --git a/lib/Devel/GlobalDestruction.pm b/lib/Devel/GlobalDestruction.pm
index 99e3eec..dc4aa35 100644
--- a/lib/Devel/GlobalDestruction.pm
+++ b/lib/Devel/GlobalDestruction.pm
@@ -38,20 +38,23 @@ die("The pure-perl version of @{[__PACKAGE__]} can not function correctly under
   . "codepath.\n"
 ) if $CGI::SpeedyCGI::i_am_speedy;
 
-
 my ($in_global_destruction, $before_is_installed);
 
 sub in_global_destruction () { $in_global_destruction }
 
+# end_av trick suggested by liz++
+require B;
+my $add_endblock = sub {
+  push @{ B::end_av()->object_2svref }, sub { $in_global_destruction = 1 };
+};
+
 # This block will fire towards the end of the program execution
-# Since there is no way for us to generate an END which will execute *last*
-# this is *NOT 100% INCOMPATIBLE* with XS/${^GLOBAL_PHASE}. We *may* end up
-# with a true in_gloal_destruction() in the middle of another END block
-# There are no practical cases where this matters.
+# Use it to inject an END block which is guaranteed to run last
+# (as long as something else doesn't inject yet another block in
+# the same manner afterwards, at which point it hardly matters
+# anyway)
 #
-END {
-  $in_global_destruction = 1;
-}
+END { $add_endblock->() }
 
 # threads do not execute the global ENDs (it would be stupid). However
 # one can register a new END via simple string eval within a thread, and
@@ -146,6 +149,8 @@ Peter Rabbitson E<lt>ribasushi@cpan.orgE<gt>
 
 Arthur Axel 'fREW' Schmidt E<lt>frioux@gmail.comE<gt>
 
+Elizabeth Mattijsen E<lt>liz@dijkmat.nlE<gt>
+
 =head1 COPYRIGHT
 
     Copyright (c) 2008 Yuval Kogman. All rights reserved
diff --git a/t/01_basic.t b/t/01_basic.t
index b93496a..c739a63 100644
--- a/t/01_basic.t
+++ b/t/01_basic.t
@@ -25,7 +25,7 @@ BEGIN {
   sub DESTROY { my $self = shift; $self->[0]->() }
 }
 
-print "1..6\n";
+print "1..9\n";
 
 our $had_error;
 
@@ -58,6 +58,10 @@ sub ok ($$) {
   print "\n";
 }
 
+END {
+  ok( ! in_global_destruction(), 'Not yet in GD while in END block 2' )
+}
+
 ok( eval "use Devel::GlobalDestruction; 1", "use Devel::GlobalDestruction" );
 
 ok( defined &in_global_destruction, "exported" );
@@ -66,6 +70,13 @@ ok( defined prototype \&in_global_destruction, "defined prototype" );
 
 ok( prototype \&in_global_destruction eq "", "empty prototype" );
 
-ok( !in_global_destruction(), "not in GD" );
+ok( ! in_global_destruction(), "Runtime is not GD" );
+
+our $sg1 = Test::Scope::Guard->new(sub { ok( in_global_destruction(), "Final cleanup object destruction properly in GD" ) });
+
+END {
+  ok( ! in_global_destruction(), 'Not yet in GD while in END block 1' )
+}
 
-our $sg = Test::Scope::Guard->new(sub { ok( in_global_destruction(), "in GD" ) });
+our $sg2 = Test::Scope::Guard->new(sub { ok( ! in_global_destruction(), "Object destruction in END not considered GD" ) });
+END { undef $sg2 }