Version 0.10

[p5sagit/Devel-GlobalDestruction.git] / lib / Devel / GlobalDestruction.pm

diff --git a/lib/Devel/GlobalDestruction.pm b/lib/Devel/GlobalDestruction.pm
index cbfd5aa..263b4b5 100644 (file)
--- a/lib/Devel/GlobalDestruction.pm
+++ b/lib/Devel/GlobalDestruction.pm
@@ -1,36 +1,55 @@
-#!/usr/bin/perl
-
 package Devel::GlobalDestruction;
 
 use strict;
 use warnings;
 
-use XSLoader;
-
-our $VERSION = '0.04';
+our $VERSION = '0.10';
 
-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 ] },
 };
 
+# 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
+#
+elsif (eval {
+  require Devel::GlobalDestruction::XS;
+  no warnings 'once';
+  *in_global_destruction = \&Devel::GlobalDestruction::XS::in_global_destruction;
+  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.  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) {
+    # work around 5.6 eval bug
+    eval '0 && $started; CHECK { $started = 1 }; 1'
+      or die $@;
+  }
+  eval '0 && $started; sub in_global_destruction () { $started && B::main_start()->isa(q[B::NULL]) }; 1'
+    or die $@;
 }
 
-__PACKAGE__
+1;  # keep require happy
 
-__END__
 
-=pod
+__END__
 
 =head1 NAME
 
-Devel::GlobalDestruction - Expose the flag which marks global
-destruction.
+Devel::GlobalDestruction - Provides function returning the equivalent of
+C<${^GLOBAL_PHASE} eq 'DESTRUCT'> for older perls.
 
 =head1 SYNOPSIS
 
@@ -59,24 +78,19 @@ 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 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
 
-=head1 VERSION CONTROL
-
-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.
-
 =head1 AUTHORS
 
 Yuval Kogman E<lt>nothingmuch@woobling.orgE<gt>
@@ -85,6 +99,14 @@ Florian Ragwitz E<lt>rafl@debian.orgE<gt>
 
 Jesse Luehrs E<lt>doy@tozt.netE<gt>
 
+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>
+
+Greham Knop E<lt>haarg@haarg.orgE<gt>
+
 =head1 COPYRIGHT
 
     Copyright (c) 2008 Yuval Kogman. All rights reserved
@@ -92,5 +114,3 @@ Jesse Luehrs E<lt>doy@tozt.netE<gt>
     it and/or modify it under the same terms as Perl itself.
 
 =cut
-
-