use strict;
use warnings;
-our $VERSION = '0.08';
+our $VERSION = '0.09';
use Sub::Exporter::Progressive -setup => {
exports => [ qw(in_global_destruction) ],
# we run 5.14+ - everything is in core
#
if (defined ${^GLOBAL_PHASE}) {
- eval 'sub in_global_destruction () { ${^GLOBAL_PHASE} eq q[DESTRUCT] }';
+ eval 'sub in_global_destruction () { ${^GLOBAL_PHASE} eq q[DESTRUCT] }; 1'
+ or die $@;
}
# try to load the xs version if it was compiled
#
}) {
# the eval already installed everything, nothing to do
}
-# Not core nor XS
-# The whole thing is in an eval to prevent perl from parsing it in the
-# first place under perls where none of this is needed
-#
else {
- eval <<'PP_IGD' or die $@;
-
-# SpeedyCGI runs END blocks every cycle but somehow keeps object instances
-# hence DIAF
-die("The pure-perl version of @{[__PACKAGE__]} can not function correctly under CGI::SpeedyCGI. "
- . "Please ensure you have a working compiler, and reinstall @{[__PACKAGE__]} to enable the XS "
- . "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
-# 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 { $add_endblock->() }
-
-# threads do not execute the global ENDs (it would be stupid). However
-# one can register a new thread-local END from within a thread, and
-# achieve the same result. A logical place to do this would be CLONE, which
-# is claimed to run in the context of the new thread. However this does
-# not really seem to be the case - any END inserted in a CLONE is ignored :(
-# Hence blatantly hooking threads::create
-#
-if ($INC{'threads.pm'}) {
- require Scalar::Util;
-
- my $orig_create = threads->can('create');
- no warnings 'redefine';
-
- *threads::create = sub {
- my $class = shift;
- my $target = shift;
-
- unless ( (Scalar::Util::reftype($target)||'') eq 'CODE' ) {
- no strict 'refs';
- $target = \&{ caller() . "::$target" };
- }
-
- @_ = (
- $class,
- sub { $add_endblock->(); goto $target },
- @_,
- );
-
- 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__ ]}");
+ # internally, PL_main_start is nulled immediately before entering global destruction
+ # and we can use B to detect that. It will also be null before the main runloop starts,
+ # so we check install a CHECK if needed to detect that.
+ require B;
+ my $started = !B::main_start()->isa(q[B::NULL]);
+ unless ($started) {
+ eval 'CHECK { $started = 1 }; 1'
+ or die $@;
}
-}
-
-1; # keep eval happy
-
-PP_IGD
-
+ eval 'sub in_global_destruction () { $started && B::main_start()->isa(q[B::NULL]) }; 1'
+ or die $@;
}
1; # keep require happy
=item in_global_destruction
Returns true if the interpreter is in global destruction. In perl 5.14+, this
-returns C<${^GLOBAL_PHASE} eq 'DESTRUCT'>, and on earlier perls, it returns the
-current value of C<PL_dirty>.
+returns C<${^GLOBAL_PHASE} eq 'DESTRUCT'>, and on earlier perls, detects it using
+the value of C<PL_main_start> or C<PL_dirty>.
=back
Elizabeth Mattijsen E<lt>liz@dijkmat.nlE<gt>
+Greham Knop E<lt>haarg@haarg.orgE<gt>
+
=head1 COPYRIGHT
Copyright (c) 2008 Yuval Kogman. All rights reserved