inline Devel::GlobalDestruction pure perl code temporarily

[gitmo/Moo.git] / lib / Moo / _Utils.pm

diff --git a/lib/Moo/_Utils.pm b/lib/Moo/_Utils.pm
index 34aad9a..7c2a8f8 100644 (file)
--- a/lib/Moo/_Utils.pm
+++ b/lib/Moo/_Utils.pm
@@ -10,15 +10,17 @@ use constant can_haz_subname => eval { require Sub::Name };
 
 use strictures 1;
 use Module::Runtime qw(require_module);
-use Devel::GlobalDestruction;
 use base qw(Exporter);
 use Moo::_mro;
 
 our @EXPORT = qw(
     _getglob _install_modifier _load_module _maybe_load_module
     _get_linear_isa _getstash _install_coderef _name_coderef
+    _in_global_destruction
 );
 
+sub _in_global_destruction;
+
 sub _install_modifier {
   my ($into, $type, $name, $code) = @_;
 
@@ -78,7 +80,7 @@ sub STANDARD_DESTROY {
     local $?;
     local $@;
     eval {
-      $self->DEMOLISHALL(in_global_destruction);
+      $self->DEMOLISHALL(_in_global_destruction);
     };
     $@;
   };
@@ -87,4 +89,50 @@ sub STANDARD_DESTROY {
   die $e if $e; # rethrow
 }
 
+if (defined ${^GLOBAL_PHASE}) {
+    eval 'sub _in_global_destruction () { ${^GLOBAL_PHASE} eq q[DESTRUCT] }';
+} else {
+  eval <<'PP_IGD' or die $@;
+
+my ($in_global_destruction, $before_is_installed);
+
+sub _in_global_destruction { $in_global_destruction }
+
+END {
+  # SpeedyCGI runs END blocks every cycle but somehow keeps object instances
+  # hence lying about it seems reasonable...ish
+  $in_global_destruction = 1 unless $CGI::SpeedyCGI::i_am_speedy;
+}
+
+# threads do not execute the global ENDs (it would be stupid). However
+# one can register a new END via simple string eval within a thread, and
+# achieve the same result. A logical place to do this would be CLONE, which
+# is claimed to run in the context of the new thread. However this does
+# not really seem to be the case - any END evaled in a CLONE is ignored :(
+# Hence blatantly hooking threads::create
+
+if ($INC{'threads.pm'}) {
+  my $orig_create = threads->can('create');
+  no warnings 'redefine';
+  *threads::create = sub {
+    { local $@; eval 'END { $in_global_destruction = 1 }' };
+    goto $orig_create;
+  };
+  $before_is_installed = 1;
+}
+
+# just in case threads got loaded after us (silly)
+sub CLONE {
+  unless ($before_is_installed) {
+    require Carp;
+    Carp::croak("You must load the 'threads' module before @{[ __PACKAGE__ ]}");
+  }
+}
+
+1;  # keep eval happy
+
+PP_IGD
+
+}
+
 1;