Upgrade to threads-shared-1.03

p4raw-id: //depot/perl@28923

17 files changed, 1722 insertions, 1421 deletions

diff --git a/ext/threads/shared/README b/ext/threads/shared/README
index 0690835a2c..0f703d1b9a 100644
--- a/ext/threads/shared/README
+++ b/ext/threads/shared/README
@@ -1,26 +1,29 @@
-threads/shared version 0.02
-===========================
+threads::shared version 1.03
+============================
 
-This module needs perl 5.7.2 or later compiled with USEITHREADS, 
-It lets you share simple data structures between threads.
+This module needs Perl 5.8.0 or later compiled with USEITHREADS.
+It lets you share data structures between threads.
 
 INSTALLATION
 
 To install this module type the following:
 
-   perl Makefile.PL
-   make
-   make test
-   make install
+    perl Makefile.PL
+    make
+    make test
+    make install
 
 DEPENDENCIES
 
 This module requires these other modules and libraries:
 
-threads 0.03;
+    threads
 
 COPYRIGHT AND LICENCE
 
-Copyright (C) 2001 Arthur Bergman artur at contiller.se
-Same licence as perl.
+Copyright (C) 2001 Artur Bergman <sky AT crucially DOT net>
+Same licence as Perl.
 
+CPAN version produced by Jerry D. Hedden <jdhedden AT cpan DOT org>
+
+# EOF
diff --git a/ext/threads/shared/shared.pm b/ext/threads/shared/shared.pm
index 3878f6d961..4ab12db988 100644
--- a/ext/threads/shared/shared.pm
+++ b/ext/threads/shared/shared.pm
@@ -1,62 +1,89 @@
 package threads::shared;
 
 use 5.008;
+
 use strict;
 use warnings;
-BEGIN {
-    require Exporter;
-    our @ISA = qw(Exporter);
-    our @EXPORT = qw(share cond_wait cond_timedwait cond_broadcast cond_signal);
-    our $VERSION = '0.94_01';
 
+our $VERSION = '1.03';
+my $XS_VERSION = $VERSION;
+$VERSION = eval $VERSION;
+
+# Declare that we have been loaded
+$threads::shared::threads_shared = 1;
+
+# Load the XS code, if applicable
+if ($threads::threads) {
+    require XSLoader;
+    XSLoader::load('threads::shared', $XS_VERSION);
+
+    *is_shared = \&_id;
+
+} else {
+    # String eval is generally evil, but we don't want these subs to
+    # exist at all if 'threads' is not loaded successfully.
+    # Vivifying them conditionally this way saves on average about 4K
+    # of memory per thread.
+    eval <<'_MARKER_';
+        sub share          (\[$@%])         { return $_[0] }
+        sub is_shared      (\[$@%])         { undef }
+        sub cond_wait      (\[$@%];\[$@%])  { undef }
+        sub cond_timedwait (\[$@%]$;\[$@%]) { undef }
+        sub cond_signal    (\[$@%])         { undef }
+        sub cond_broadcast (\[$@%])         { undef }
+_MARKER_
+}
+
+
+### Export ###
+
+sub import
+{
+    # Exported subroutines
+    my @EXPORT = qw(share is_shared cond_wait cond_timedwait
+                    cond_signal cond_broadcast);
     if ($threads::threads) {
-	*cond_wait = \&cond_wait_enabled;
-	*cond_timedwait = \&cond_timedwait_enabled;
-	*cond_signal = \&cond_signal_enabled;
-	*cond_broadcast = \&cond_broadcast_enabled;
-	require XSLoader;
-	XSLoader::load('threads::shared',$VERSION);
-	push @EXPORT,'bless';
+        push(@EXPORT, 'bless');
     }
-    else {
-
-# String eval is generally evil, but we don't want these subs to exist at all
-# if threads are loaded successfully.  Vivifying them conditionally this way
-# saves on average about 4K of memory per thread.
-
-        eval <<'EOD';
-sub cond_wait      (\[$@%];\[$@%])  { undef }
-sub cond_timedwait (\[$@%]$;\[$@%]) { undef }
-sub cond_signal    (\[$@%])         { undef }
-sub cond_broadcast (\[$@%])         { undef }
-sub share          (\[$@%])         { return $_[0] }
-EOD
+
+    # Export subroutine names
+    my $caller = caller();
+    foreach my $sym (@EXPORT) {
+        no strict 'refs';
+        *{$caller.'::'.$sym} = \&{$sym};
     }
 }
 
-$threads::shared::threads_shared = 1;
+
+### Methods, etc. ###
 
 sub threads::shared::tie::SPLICE
 {
- die "Splice not implemented for shared arrays";
+    require Carp;
+    Carp::croak('Splice not implemented for shared arrays');
 }
 
+1;
+
 __END__
 
 =head1 NAME
 
 threads::shared - Perl extension for sharing data structures between threads
 
+=head1 VERSION
+
+This document describes threads::shared version 1.03
+
 =head1 SYNOPSIS
 
   use threads;
   use threads::shared;
 
-  my $var : shared;
+  my $var :shared;
   $var = $scalar_value;
   $var = $shared_ref_value;
-  $var = &share($simple_unshared_ref_value);
-  $var = &share(new Foo);
+  $var = share($simple_unshared_ref_value);
 
   my($scalar, @array, %hash);
   share($scalar);
@@ -72,7 +99,7 @@ threads::shared - Perl extension for sharing data structures between threads
   cond_broadcast(@array);
   cond_signal(%hash);
 
-  my $lockvar : shared;
+  my $lockvar :shared;
   # condition var != lock var
   cond_wait($var, $lockvar);
   cond_timedwait($var, time()+30, $lockvar);
@@ -80,18 +107,18 @@ threads::shared - Perl extension for sharing data structures between threads
 =head1 DESCRIPTION
 
 By default, variables are private to each thread, and each newly created
-thread gets a private copy of each existing variable.  This module allows
-you to share variables across different threads (and pseudoforks on Win32).
-It is used together with the threads module.
+thread gets a private copy of each existing variable.  This module allows you
+to share variables across different threads (and pseudoforks on Win32).  It is
+used together with the L<threads> module.
 
 =head1 EXPORT
 
-C<share>, C<cond_wait>, C<cond_timedwait>, C<cond_signal>, C<cond_broadcast>
+C<share>, C<cond_wait>, C<cond_timedwait>, C<cond_signal>, C<cond_broadcast>,
+C<is_shared>
 
-Note that if this module is imported when C<threads> has not yet been
-loaded, then these functions all become no-ops. This makes it possible
-to write modules that will work in both threaded and non-threaded
-environments.
+Note that if this module is imported when L<threads> has not yet been loaded,
+then these functions all become no-ops.  This makes it possible to write
+modules that will work in both threaded and non-threaded environments.
 
 =head1 FUNCTIONS
 
@@ -99,171 +126,265 @@ environments.
 
 =item share VARIABLE
 
-C<share> takes a value and marks it as shared. You can share a scalar,
-array, hash, scalar ref, array ref or hash ref.  C<share> will return
-the shared rvalue but always as a reference.
-
-C<share> will traverse up references exactly I<one> level.
-C<share(\$a)> is equivalent to C<share($a)>, while C<share(\\$a)> is not.
-This means that you must create nested shared data structures by first
-creating individual shared leaf notes, then adding them to a shared hash
-or array.
+C<share> takes a value and marks it as shared. You can share a scalar, array,
+hash, scalar ref, array ref, or hash ref.  C<share> will return the shared
+rvalue, but always as a reference.
 
 A variable can also be marked as shared at compile time by using the
-C<shared> attribute: C<my $var : shared>.
+C<:shared> attribute: C<my $var :shared;>.
 
-If you want to share a newly created reference unfortunately you
-need to use C<&share([])> and C<&share({})> syntax due to problems
-with Perl's prototyping.
+Due to problems with Perl's prototyping, if you want to share a newly created
+reference, you need to use the C<&share([])> and C<&share({})> syntax.
 
 The only values that can be assigned to a shared scalar are other scalar
-values, or shared refs, eg
+values, or shared refs:
+
+  my $var :shared;
+  $var = 1;              # ok
+  $var = [];             # error
+  $var = &share([]);     # ok
+
+C<share> will traverse up references exactly I<one> level.  C<share(\$a)> is
+equivalent to C<share($a)>, while C<share(\\$a)> is not.  This means that you
+must create nested shared data structures by first creating individual shared
+leaf nodes, and then adding them to a shared hash or array.
 
-    my $var : shared;
-    $var = 1;              # ok
-    $var = &share([]);     # ok
-    $var = [];             # error
-    $var = A->new;         # error
-    $var = &share(A->new); # ok as long as the A object is not nested
+  my %hash :shared;
+  $hash{'meaning'} = &share([]);
+  $hash{'meaning'}[0] = &share({});
+  $hash{'meaning'}[0]{'life'} = 42;
 
-Note that it is often not wise to share an object unless the class itself
-has been written to support sharing; for example, an object's destructor
-may get called multiple times, one for each thread's scope exit.
+=item is_shared VARIABLE
+
+C<is_shared> checks if the specified variable is shared or not.  If shared,
+returns the variable's internal ID (similar to
+L<refaddr()|Scalar::Util/"refaddr EXPR">).  Otherwise, returns C<undef>.
+
+  if (is_shared($var)) {
+      print("\$var is shared\n");
+  } else {
+      print("\$var is not shared\n");
+  }
 
 =item lock VARIABLE
 
-C<lock> places a lock on a variable until the lock goes out of scope.
-If the variable is locked by another thread, the C<lock> call will
-block until it's available. C<lock> is recursive, so multiple calls
-to C<lock> are safe -- the variable will remain locked until the
-outermost lock on the variable goes out of scope.
+C<lock> places a lock on a variable until the lock goes out of scope.  If the
+variable is locked by another thread, the C<lock> call will block until it's
+available.  C<lock> is recursive, so multiple calls to C<lock> are safe -- the
+variable will remain locked until the outermost lock on the variable goes out
+of scope.
+
+If a container object, such as a hash or array, is locked, all the elements of
+that container are not locked.  For example, if a thread does a C<lock @a>,
+any other thread doing a C<lock($a[12])> won't block.
 
-If a container object, such as a hash or array, is locked, all the
-elements of that container are not locked. For example, if a thread
-does a C<lock @a>, any other thread doing a C<lock($a[12])> won't block.
+C<lock> will traverse up references exactly I<one> level.  C<lock(\$a)> is
+equivalent to C<lock($a)>, while C<lock(\\$a)> is not.
 
-C<lock> will traverse up references exactly I<one> level.
-C<lock(\$a)> is equivalent to C<lock($a)>, while C<lock(\\$a)> is not.
+Note that you cannot explicitly unlock a variable; you can only wait for the
+lock to go out of scope.  This is most easily accomplished by locking the
+variable inside a block.
 
-Note that you cannot explicitly unlock a variable; you can only wait
-for the lock to go out of scope. If you need more fine-grained
-control, see L<Thread::Semaphore>.
+  my $var :shared;
+  {
+      lock($var);
+      # $var is locked from here to the end of the block
+      ...
+  }
+  # $var is now unlocked
+
+If you need more fine-grained control over shared variable access, see
+L<Thread::Semaphore>.
 
 =item cond_wait VARIABLE
 
 =item cond_wait CONDVAR, LOCKVAR
 
-The C<cond_wait> function takes a B<locked> variable as a parameter,
-unlocks the variable, and blocks until another thread does a
-C<cond_signal> or C<cond_broadcast> for that same locked variable.
-The variable that C<cond_wait> blocked on is relocked after the
-C<cond_wait> is satisfied.  If there are multiple threads
-C<cond_wait>ing on the same variable, all but one will reblock waiting
-to reacquire the lock on the variable. (So if you're only using
-C<cond_wait> for synchronisation, give up the lock as soon as
-possible). The two actions of unlocking the variable and entering the
-blocked wait state are atomic, the two actions of exiting from the
-blocked wait state and relocking the variable are not.
-
-In its second form, C<cond_wait> takes a shared, B<unlocked> variable
-followed by a shared, B<locked> variable.  The second variable is
-unlocked and thread execution suspended until another thread signals
-the first variable.
-
-It is important to note that the variable can be notified even if
-no thread C<cond_signal> or C<cond_broadcast> on the variable.
-It is therefore important to check the value of the variable and
-go back to waiting if the requirement is not fulfilled.  For example,
-to pause until a shared counter drops to zero:
-
-    { lock($counter); cond_wait($count) until $counter == 0; }
+The C<cond_wait> function takes a B<locked> variable as a parameter, unlocks
+the variable, and blocks until another thread does a C<cond_signal> or
+C<cond_broadcast> for that same locked variable.  The variable that
+C<cond_wait> blocked on is relocked after the C<cond_wait> is satisfied.  If
+there are multiple threads C<cond_wait>ing on the same variable, all but one
+will reblock waiting to reacquire the lock on the variable. (So if you're only
+using C<cond_wait> for synchronisation, give up the lock as soon as possible).
+The two actions of unlocking the variable and entering the blocked wait state
+are atomic, the two actions of exiting from the blocked wait state and
+relocking the variable are not.
+
+In its second form, C<cond_wait> takes a shared, B<unlocked> variable followed
+by a shared, B<locked> variable.  The second variable is unlocked and thread
+execution suspended until another thread signals the first variable.
+
+It is important to note that the variable can be notified even if no thread
+C<cond_signal> or C<cond_broadcast> on the variable.  It is therefore
+important to check the value of the variable and go back to waiting if the
+requirement is not fulfilled.  For example, to pause until a shared counter
+drops to zero:
+
+  { lock($counter); cond_wait($count) until $counter == 0; }
 
 =item cond_timedwait VARIABLE, ABS_TIMEOUT
 
 =item cond_timedwait CONDVAR, ABS_TIMEOUT, LOCKVAR
 
-In its two-argument form, C<cond_timedwait> takes a B<locked> variable
-and an absolute timeout as parameters, unlocks the variable, and blocks
-until the timeout is reached or another thread signals the variable.  A
-false value is returned if the timeout is reached, and a true value
-otherwise.  In either case, the variable is re-locked upon return.
+In its two-argument form, C<cond_timedwait> takes a B<locked> variable and an
+absolute timeout as parameters, unlocks the variable, and blocks until the
+timeout is reached or another thread signals the variable.  A false value is
+returned if the timeout is reached, and a true value otherwise.  In either
+case, the variable is re-locked upon return.
 
-Like C<cond_wait>, this function may take a shared, B<locked> variable
-as an additional parameter; in this case the first parameter is an
-B<unlocked> condition variable protected by a distinct lock variable.
+Like C<cond_wait>, this function may take a shared, B<locked> variable as an
+additional parameter; in this case the first parameter is an B<unlocked>
+condition variable protected by a distinct lock variable.
 
-Again like C<cond_wait>, waking up and reacquiring the lock are not
-atomic, and you should always check your desired condition after this
-function returns.  Since the timeout is an absolute value, however, it
-does not have to be recalculated with each pass:
+Again like C<cond_wait>, waking up and reacquiring the lock are not atomic,
+and you should always check your desired condition after this function
+returns.  Since the timeout is an absolute value, however, it does not have to
+be recalculated with each pass:
 
-    lock($var);
-    my $abs = time() + 15;
-    until ($ok = desired_condition($var)) {
+  lock($var);
+  my $abs = time() + 15;
+  until ($ok = desired_condition($var)) {
       last if !cond_timedwait($var, $abs);
-    }
-    # we got it if $ok, otherwise we timed out!
+  }
+  # we got it if $ok, otherwise we timed out!
 
 =item cond_signal VARIABLE
 
-The C<cond_signal> function takes a B<locked> variable as a parameter
-and unblocks one thread that's C<cond_wait>ing on that variable. If
-more than one thread is blocked in a C<cond_wait> on that variable,
-only one (and which one is indeterminate) will be unblocked.
+The C<cond_signal> function takes a B<locked> variable as a parameter and
+unblocks one thread that's C<cond_wait>ing on that variable. If more than one
+thread is blocked in a C<cond_wait> on that variable, only one (and which one
+is indeterminate) will be unblocked.
 
-If there are no threads blocked in a C<cond_wait> on the variable,
-the signal is discarded. By always locking before signaling, you can
-(with care), avoid signaling before another thread has entered cond_wait().
+If there are no threads blocked in a C<cond_wait> on the variable, the signal
+is discarded. By always locking before signaling, you can (with care), avoid
+signaling before another thread has entered cond_wait().
 
-C<cond_signal> will normally generate a warning if you attempt to use it
-on an unlocked variable. On the rare occasions where doing this may be
-sensible, you can skip the warning with
+C<cond_signal> will normally generate a warning if you attempt to use it on an
+unlocked variable. On the rare occasions where doing this may be sensible, you
+can skip the warning with:
 
-    { no warnings 'threads'; cond_signal($foo) }
+  { no warnings 'threads'; cond_signal($foo); }
 
 =item cond_broadcast VARIABLE
 
 The C<cond_broadcast> function works similarly to C<cond_signal>.
-C<cond_broadcast>, though, will unblock B<all> the threads that are
-blocked in a C<cond_wait> on the locked variable, rather than only one.
+C<cond_broadcast>, though, will unblock B<all> the threads that are blocked in
+a C<cond_wait> on the locked variable, rather than only one.
 
 =back
 
+=head1 OBJECTS
+
+L<threads::shared> exports a version of L<bless()|perlfunc/"bless REF"> that
+works on shared objects such that i<blessings> propagate across threads.
+
+  # Create a shared 'foo' object
+  my $foo;
+  share($foo);
+  $foo = &share({});
+  bless($foo, 'foo');
+
+  # Create a shared 'bar' object
+  my $bar;
+  share($bar);
+  $bar = &share({});
+  bless($bar, 'bar');
+
+  # Put 'bar' inside 'foo'
+  $foo->{'bar'} = $bar;
+
+  # Rebless the objects via a thread
+  threads->create(sub {
+      # Rebless the outer object
+      bless($foo, 'yin');
+
+      # Cannot directly rebless the inner object
+      #bless($foo->{'bar'}, 'yang');
+
+      # Retrieve and rebless the inner object
+      my $obj = $foo->{'bar'};
+      bless($obj, 'yang');
+      $foo->{'bar'} = $obj;
+
+  })->join();
+
+  print(ref($foo),          "\n");    # Prints 'yin'
+  print(ref($foo->{'bar'}), "\n");    # Prints 'yang'
+  print(ref($bar),          "\n");    # Also prints 'yang'
+
 =head1 NOTES
 
-threads::shared is designed to disable itself silently if threads are
-not available. If you want access to threads, you must C<use threads>
-before you C<use threads::shared>.  threads will emit a warning if you
-use it after threads::shared.
+threads::shared is designed to disable itself silently if threads are not
+available. If you want access to threads, you must C<use threads> before you
+C<use threads::shared>.  L<threads> will emit a warning if you use it after
+L<threads::shared>.
 
-=head1 BUGS
+=head1 BUGS AND LIMITATIONS
 
-C<bless> is not supported on shared references. In the current version,
-C<bless> will only bless the thread local reference and the blessing
-will not propagate to the other threads. This is expected to be
-implemented in a future version of Perl.
+When C<share> is used on arrays, hashes, array refs or hash refs, any data
+they contain will be lost.
 
-Does not support splice on arrays!
+  my @arr = qw(foo bar baz);
+  share(@arr);
+  # @arr is now empty (i.e., == ());
 
-Taking references to the elements of shared arrays and hashes does not
-autovivify the elements, and neither does slicing a shared array/hash
-over non-existent indices/keys autovivify the elements.
+  # Create a 'foo' object
+  my $foo = { 'data' => 99 };
+  bless($foo, 'foo');
 
-share() allows you to C<< share $hashref->{key} >> without giving any error
-message.  But the C<< $hashref->{key} >> is B<not> shared, causing the error
-"locking can only be used on shared values" to occur when you attempt to
-C<< lock $hasref->{key} >>.
+  # Share the object
+  share($foo);        # Contents are now wiped out
+  print("ERROR: \$foo is empty\n")
+      if (! exists($foo->{'data'}));
 
-=head1 AUTHOR
+Therefore, populate such variables B<after> declaring them as shared.  (Scalar
+and scalar refs are not affected by this problem.)
+
+It is often not wise to share an object unless the class itself has been
+written to support sharing. For example, an object's destructor may get called
+multiple times, one for each thread's scope exit.  Another example, is that
+the contents of hash-based objects will be lost due to the above mentioned
+limitation.
 
-Arthur Bergman E<lt>arthur at contiller.seE<gt>
+Does not support C<splice> on arrays!
 
-threads::shared is released under the same license as Perl
+Taking references to the elements of shared arrays and hashes does not
+autovivify the elements, and neither does slicing a shared array/hash over
+non-existent indices/keys autovivify the elements.
+
+C<share()> allows you to C<< share($hashref->{key}) >> without giving any
+error message.  But the C<< $hashref->{key} >> is B<not> shared, causing the
+error "locking can only be used on shared values" to occur when you attempt to
+C<< lock($hasref->{key}) >>.
 
-Documentation borrowed from the old Thread.pm
+View existing bug reports at, and submit any new bugs, problems, patches, etc.
+to: L<http://rt.cpan.org/NoAuth/Bugs.html?Dist=threads-shared>
 
 =head1 SEE ALSO
 
-L<threads>, L<perlthrtut>, L<http://www.perl.com/pub/a/2002/06/11/threads.html>
+L<threads::shared> Discussion Forum on CPAN:
+L<http://www.cpanforum.com/dist/threads-shared>
+
+Annotated POD for L<threads::shared>:
+L<http://annocpan.org/~JDHEDDEN/threads-shared-1.03/shared.pm>
+
+L<threads>, L<perlthrtut>
+
+L<http://www.perl.com/pub/a/2002/06/11/threads.html> and
+L<http://www.perl.com/pub/a/2002/09/04/threads.html>
+
+Perl threads mailing list:
+L<http://lists.cpan.org/showlist.cgi?name=iThreads>
+
+=head1 AUTHOR
+
+Artur Bergman E<lt>sky AT crucially DOT netE<gt>
+
+threads::shared is released under the same license as Perl.
+
+Documentation borrowed from the old Thread.pm.
+
+CPAN version produced by Jerry D. Hedden E<lt>jdhedden AT cpan DOT orgE<gt>.
 
 =cut
diff --git a/ext/threads/shared/shared.xs b/ext/threads/shared/shared.xs
index 1bdbb08a45..955874a487 100644
--- a/ext/threads/shared/shared.xs
+++ b/ext/threads/shared/shared.xs
@@ -9,8 +9,10 @@
  * opposite directions."
  *                         --Sourcery
  *
- * Contributed by Arthur Bergman arthur@contiller.se
- * pulled in the (an)other direction by Nick Ing-Simmons nick@ing-simmons.net
+ * Contributed by Artur Bergman <sky AT crucially DOT net>
+ * Pulled in the (an)other direction by Nick Ing-Simmons
+ *      <nick AT ing-simmons DOT net>
+ * CPAN version produced by Jerry D. Hedden <jdhedden AT cpan DOT org>
  */
 
 /*
@@ -25,11 +27,11 @@
  *
  * Aggregates (AVs and HVs) are implemented using tie magic, except that
  * the vtable used is one defined in this file rather than the standard one.
- * This means that where a tie function like is FETCH is normally invoked by
+ * This means that where a tie function like FETCH is normally invoked by
  * the tie magic's mg_get() function, we completely bypass the calling of a
  * perl-level function, and directly call C-level code to handle it. On
- * the other hand. calls to functions like PUSH are done directly by code
- * in av.c etc, which we can't bypass. So the best we can do is to provide
+ * the other hand, calls to functions like PUSH are done directly by code
+ * in av.c, etc., which we can't bypass. So the best we can do is to provide
  * XS versions of these functions. We also have to attach a tie object,
  * blessed into the class threads::shared::tie, to keep the method-calling
  * code happy.
@@ -53,7 +55,7 @@
  *   FLAGS = (PADMY,GMG,SMG)
  *   MAGIC = 0x824d88
  *     MG_TYPE = PERL_MAGIC_shared_scalar(n)
- *     MG_PTR = 0x810358		<<<< pointer to the shared SV
+ *     MG_PTR = 0x810358                <<<< pointer to the shared SV
  *
  * -----------------
  *
@@ -63,14 +65,14 @@
  *   FLAGS = (PADMY,RMG)
  *   MAGIC = 0x824e48
  *     MG_TYPE = PERL_MAGIC_tied(P)
- *     MG_OBJ = 0x7136e0		<<<< ref to the tied object
+ *     MG_OBJ = 0x7136e0                <<<< ref to the tied object
  *     SV = RV(0x7136f0) at 0x7136e0
  *       RV = 0x738640
  *       SV = PVMG(0x7ba238) at 0x738640 <<<< the tied object
  *         FLAGS = (OBJECT,IOK,pIOK)
- *         IV = 8455000			<<<< pointer to the shared AV
+ *         IV = 8455000                 <<<< pointer to the shared AV
  *         STASH = 0x80abf0 "threads::shared::tie"
- *     MG_PTR = 0x810358 ""		<<<< another pointer to the shared AV
+ *     MG_PTR = 0x810358 ""             <<<< another pointer to the shared AV
  *   ARRAY = 0x0
  *
  * -----------------
@@ -81,42 +83,60 @@
  *   FLAGS = (GMG,SMG,RMG,pIOK)
  *   MAGIC = 0x72bd58
  *     MG_TYPE = PERL_MAGIC_shared_scalar(n)
- *     MG_PTR = 0x8103c0 ""		<<<< pointer to the shared element
+ *     MG_PTR = 0x8103c0 ""             <<<< pointer to the shared element
  *   MAGIC = 0x72bd18
  *     MG_TYPE = PERL_MAGIC_tiedelem(p)
- *     MG_OBJ = 0x7136e0		<<<< ref to the tied object
+ *     MG_OBJ = 0x7136e0                <<<< ref to the tied object
  *     SV = RV(0x7136f0) at 0x7136e0
  *       RV = 0x738660
  *       SV = PVMG(0x7ba278) at 0x738660 <<<< the tied object
  *         FLAGS = (OBJECT,IOK,pIOK)
- *         IV = 8455064			<<<< pointer to the shared AV
+ *         IV = 8455064                 <<<< pointer to the shared AV
  *         STASH = 0x80ac30 "threads::shared::tie"
  *   TYPE = t
  *
  * Note that PERL_MAGIC_tiedelem(p) magic doesn't have a pointer to a
  * shared SV in mg_ptr; instead this is used to store the hash key,
  * if any, like normal tied elements. Note also that element SVs may have
- * pointers to both the shared aggregate and the shared element
+ * pointers to both the shared aggregate and the shared element.
  *
  *
  * Userland locks:
  *
- * if a shared variable is used as a perl-level lock or condition
+ * If a shared variable is used as a perl-level lock or condition
  * variable, then PERL_MAGIC_ext magic is attached to the associated
- * *shared* SV, whose mg_ptr field points to a malloced structure
+ * *shared* SV, whose mg_ptr field points to a malloc'ed structure
  * containing the necessary mutexes and condition variables.
  *
  * Nomenclature:
  *
- * In this file, any variable name prefixed with 's', eg ssv, stmp or sobj,
- * usually represents a shared SV which correspondis to a private SV named
- * without the prefix, eg sv, tmp or obj.
+ * In this file, any variable name prefixed with 's' (e.g., ssv, stmp or sobj)
+ * usually represents a shared SV which corresponds to a private SV named
+ * without the prefix (e.g., sv, tmp or obj).
+ */
+
+/* Patch status:
+ *
+ * Perl 5.8.8 contains threads::shared patches up to 26626 (equivalent to
+ * blead patches 26350+26351).
+ *
+ * The CPAN version of threads::shared contains the following blead patches:
+ *      26569 (applicable to 5.9.3 only)
+ *      26684
+ *      26693
+ *      26695
  */
 
 #define PERL_NO_GET_CONTEXT
 #include "EXTERN.h"
 #include "perl.h"
 #include "XSUB.h"
+#ifdef HAS_PPPORT_H
+#define NEED_vnewSVpvf
+#define NEED_warner
+#  include "ppport.h"
+#  include "shared.h"
+#endif
 
 #ifdef USE_ITHREADS
 
@@ -126,46 +146,45 @@
 PerlInterpreter *PL_sharedsv_space;             /* The shared sv space */
 /* To access shared space we fake aTHX in this scope and thread's context */
 
-/* bug #24255: we include ENTER+SAVETMPS/FREETMPS+LEAVE with
- * SHARED_CONTEXT/CALLER_CONTEXT macros, so that any mortals etc created
+/* Bug #24255: We include ENTER+SAVETMPS/FREETMPS+LEAVE with
+ * SHARED_CONTEXT/CALLER_CONTEXT macros, so that any mortals, etc. created
  * while in the shared interpreter context don't languish */
 
-#define SHARED_CONTEXT \
-    STMT_START {					\
-	PERL_SET_CONTEXT((aTHX = PL_sharedsv_space));	\
-	ENTER;						\
-	SAVETMPS;					\
+#define SHARED_CONTEXT                                  \
+    STMT_START {                                        \
+        PERL_SET_CONTEXT((aTHX = PL_sharedsv_space));   \
+        ENTER;                                          \
+        SAVETMPS;                                       \
     } STMT_END
 
 /* So we need a way to switch back to the caller's context... */
 /* So we declare _another_ copy of the aTHX variable ... */
 #define dTHXc PerlInterpreter *caller_perl = aTHX
 
-/* and use it to switch back */
-#define CALLER_CONTEXT					\
-    STMT_START {					\
-    	FREETMPS;					\
-	LEAVE;						\
-	PERL_SET_CONTEXT((aTHX = caller_perl));		\
+/* ... and use it to switch back */
+#define CALLER_CONTEXT                                  \
+    STMT_START {                                        \
+        FREETMPS;                                       \
+        LEAVE;                                          \
+        PERL_SET_CONTEXT((aTHX = caller_perl));         \
     } STMT_END
 
 /*
  * Only one thread at a time is allowed to mess with shared space.
  */
 
-typedef struct
-{
- perl_mutex		 mutex;
- PerlInterpreter	*owner;
- I32			 locks;
- perl_cond		 cond;
+typedef struct {
+    perl_mutex          mutex;
+    PerlInterpreter    *owner;
+    I32                 locks;
+    perl_cond           cond;
 #ifdef DEBUG_LOCKS
- char *			 file;
- int			 line;
+    char *              file;
+    int                 line;
 #endif
 } recursive_lock_t;
 
-recursive_lock_t PL_sharedsv_lock;       /* Mutex protecting the shared sv space */
+recursive_lock_t PL_sharedsv_lock;   /* Mutex protecting the shared sv space */
 
 void
 recursive_lock_init(pTHX_ recursive_lock_t *lock)
@@ -187,77 +206,76 @@ recursive_lock_release(pTHX_ recursive_lock_t *lock)
 {
     MUTEX_LOCK(&lock->mutex);
     if (lock->owner != aTHX) {
-	MUTEX_UNLOCK(&lock->mutex);
-    }
-    else {
-	if (--lock->locks == 0) {
-	    lock->owner = NULL;
-	    COND_SIGNAL(&lock->cond);
-	}
+        MUTEX_UNLOCK(&lock->mutex);
+    } else if (--lock->locks == 0) {
+        lock->owner = NULL;
+        COND_SIGNAL(&lock->cond);
     }
     MUTEX_UNLOCK(&lock->mutex);
 }
 
 void
-recursive_lock_acquire(pTHX_ recursive_lock_t *lock,char *file,int line)
+recursive_lock_acquire(pTHX_ recursive_lock_t *lock, char *file, int line)
 {
     assert(aTHX);
     MUTEX_LOCK(&lock->mutex);
     if (lock->owner == aTHX) {
-	lock->locks++;
-    }
-    else {
-	while (lock->owner) {
+        lock->locks++;
+    } else {
+        while (lock->owner) {
 #ifdef DEBUG_LOCKS
-	    Perl_warn(aTHX_ " %p waiting - owned by %p %s:%d\n",
-		      aTHX, lock->owner, lock->file, lock->line);
+            Perl_warn(aTHX_ " %p waiting - owned by %p %s:%d\n",
+                      aTHX, lock->owner, lock->file, lock->line);
 #endif
-	    COND_WAIT(&lock->cond,&lock->mutex);
+            COND_WAIT(&lock->cond,&lock->mutex);
         }
-	lock->locks = 1;
-	lock->owner = aTHX;
+        lock->locks = 1;
+        lock->owner = aTHX;
 #ifdef DEBUG_LOCKS
-	lock->file  = file;
-	lock->line  = line;
+        lock->file  = file;
+        lock->line  = line;
 #endif
     }
     MUTEX_UNLOCK(&lock->mutex);
     SAVEDESTRUCTOR_X(recursive_lock_release,lock);
 }
 
-#define ENTER_LOCK         STMT_START { \
-			      ENTER; \
-			      recursive_lock_acquire(aTHX_ &PL_sharedsv_lock, __FILE__, __LINE__);   \
-                            } STMT_END
+#define ENTER_LOCK                                                          \
+    STMT_START {                                                            \
+        ENTER;                                                              \
+        recursive_lock_acquire(aTHX_ &PL_sharedsv_lock, __FILE__, __LINE__);\
+    } STMT_END
 
-/* the unlocking is done automatically at scope exit */
-#define LEAVE_LOCK       LEAVE
+/* The unlocking is done automatically at scope exit */
+#define LEAVE_LOCK      LEAVE
 
 
 /* A common idiom is to acquire access and switch in ... */
-#define SHARED_EDIT	    STMT_START {	\
-				ENTER_LOCK;	\
-				SHARED_CONTEXT;	\
-			    } STMT_END
+#define SHARED_EDIT     \
+    STMT_START {        \
+        ENTER_LOCK;     \
+        SHARED_CONTEXT; \
+    } STMT_END
 
-/* then switch out and release access. */
-#define SHARED_RELEASE     STMT_START {	\
-		                CALLER_CONTEXT;	\
-				LEAVE_LOCK;	\
-			    } STMT_END
+/* ... then switch out and release access. */
+#define SHARED_RELEASE  \
+    STMT_START {        \
+        CALLER_CONTEXT; \
+        LEAVE_LOCK;     \
+    } STMT_END
 
 
-/* user-level locks:
+/* User-level locks:
    This structure is attached (using ext magic) to any shared SV that
    is used by user-level locking or condition code
 */
 
 typedef struct {
-    recursive_lock_t    lock;		/* for user-levl locks */
+    recursive_lock_t    lock;           /* For user-levl locks */
     perl_cond           user_cond;      /* For user-level conditions */
 } user_lock;
 
-/* magic used for attaching user_lock structs to shared SVs
+/* Magic used for attaching user_lock structs to shared SVs
 
    The vtable used has just one entry - when the SV goes away
    we free the memory for the above.
@@ -269,53 +287,58 @@ sharedsv_userlock_free(pTHX_ SV *sv, MAGIC *mg)
     user_lock *ul = (user_lock *) mg->mg_ptr;
     assert(aTHX == PL_sharedsv_space);
     if (ul) {
-	recursive_lock_destroy(aTHX_ &ul->lock);
-	COND_DESTROY(&ul->user_cond);
-	PerlMemShared_free(ul);
-	mg->mg_ptr = NULL;
+        recursive_lock_destroy(aTHX_ &ul->lock);
+        COND_DESTROY(&ul->user_cond);
+        PerlMemShared_free(ul);
+        mg->mg_ptr = NULL;
     }
-    return 0;
+    return (0);
 }
 
-MGVTBL sharedsv_uesrlock_vtbl = {
- 0,				/* get */
- 0,				/* set */
- 0,				/* len */
- 0,				/* clear */
- sharedsv_userlock_free,	/* free */
- 0,				/* copy */
- 0,				/* dup */
- 0				/* local */
+MGVTBL sharedsv_userlock_vtbl = {
+    0,                          /* get */
+    0,                          /* set */
+    0,                          /* len */
+    0,                          /* clear */
+    sharedsv_userlock_free,     /* free */
+    0,                          /* copy */
+    0,                          /* dup */
+#ifdef MGf_LOCAL
+    0,                          /* local */
+#endif
 };
 
-/* Access to shared things is heavily based on MAGIC - in mg.h/mg.c/sv.c sense */
+/*
+ * Access to shared things is heavily based on MAGIC
+ *      - in mg.h/mg.c/sv.c sense
+ */
 
 /* In any thread that has access to a shared thing there is a "proxy"
    for it in its own space which has 'MAGIC' associated which accesses
    the shared thing.
  */
 
-MGVTBL sharedsv_scalar_vtbl;    /* scalars have this vtable */
-MGVTBL sharedsv_array_vtbl;     /* hashes and arrays have this - like 'tie' */
-MGVTBL sharedsv_elem_vtbl;      /* elements of hashes and arrays have this
-				   _AS WELL AS_ the scalar magic:
+MGVTBL sharedsv_scalar_vtbl;    /* Scalars have this vtable */
+MGVTBL sharedsv_array_vtbl;     /* Hashes and arrays have this - like 'tie' */
+MGVTBL sharedsv_elem_vtbl;      /* Elements of hashes and arrays have this
+                                   _AS WELL AS_ the scalar magic:
    The sharedsv_elem_vtbl associates the element with the array/hash and
    the sharedsv_scalar_vtbl associates it with the value
  */
 
 
-/* get shared aggregate SV pointed to by threads::shared::tie magic object */
+/* Get shared aggregate SV pointed to by threads::shared::tie magic object */
 
 STATIC SV *
 S_sharedsv_from_obj(pTHX_ SV *sv)
 {
-     return SvROK(sv) ? INT2PTR(SV *, SvIV(SvRV(sv))) : NULL;
+     return ((SvROK(sv)) ? INT2PTR(SV *, SvIV(SvRV(sv))) : NULL);
 }
 
 
 /* Return the user_lock structure (if any) associated with a shared SV.
- * If create is true, create one if it doesn't exist */
-
+ * If create is true, create one if it doesn't exist
+ */
 STATIC user_lock *
 S_get_userlock(pTHX_ SV* ssv, bool create)
 {
@@ -323,26 +346,26 @@ S_get_userlock(pTHX_ SV* ssv, bool create)
     user_lock *ul = NULL;
 
     assert(ssv);
-    /* XXX redsign the storage of user locks so we dont need a global
+    /* XXX Redesign the storage of user locks so we don't need a global
      * lock to access them ???? DAPM */
     ENTER_LOCK;
     mg = mg_find(ssv, PERL_MAGIC_ext);
-    if (mg)
-	ul = (user_lock*)(mg->mg_ptr);
-    else if (create) {
-	dTHXc;
-	SHARED_CONTEXT;
-	ul = (user_lock *) PerlMemShared_malloc(sizeof(user_lock));
-	Zero(ul, 1, user_lock);
-	/* attach to shared SV using ext magic */
-	sv_magicext(ssv, NULL, PERL_MAGIC_ext, &sharedsv_uesrlock_vtbl,
-	       (char *)ul, 0);
-	recursive_lock_init(aTHX_ &ul->lock);
-	COND_INIT(&ul->user_cond);
-	CALLER_CONTEXT;
+    if (mg) {
+        ul = (user_lock*)(mg->mg_ptr);
+    } else if (create) {
+        dTHXc;
+        SHARED_CONTEXT;
+        ul = (user_lock *) PerlMemShared_malloc(sizeof(user_lock));
+        Zero(ul, 1, user_lock);
+        /* Attach to shared SV using ext magic */
+        sv_magicext(ssv, NULL, PERL_MAGIC_ext, &sharedsv_userlock_vtbl,
+               (char *)ul, 0);
+        recursive_lock_init(aTHX_ &ul->lock);
+        COND_INIT(&ul->user_cond);
+        CALLER_CONTEXT;
     }
     LEAVE_LOCK;
-    return ul;
+    return (ul);
 }
 
 
@@ -358,36 +381,37 @@ Perl_sharedsv_find(pTHX_ SV *sv)
 {
     MAGIC *mg;
     if (SvTYPE(sv) >= SVt_PVMG) {
-	switch(SvTYPE(sv)) {
-	case SVt_PVAV:
-	case SVt_PVHV:
-	    if ((mg = mg_find(sv, PERL_MAGIC_tied))
-		&& mg->mg_virtual == &sharedsv_array_vtbl) {
-		return (SV *) mg->mg_ptr;
-	    }
-	    break;
-	default:
-	    /* This should work for elements as well as they
-	     * have scalar magic as well as their element magic
-	     */
-	    if ((mg = mg_find(sv, PERL_MAGIC_shared_scalar))
-		&& mg->mg_virtual == &sharedsv_scalar_vtbl) {
-		return (SV *) mg->mg_ptr;
-	    }
-	    break;
-	}
+        switch(SvTYPE(sv)) {
+        case SVt_PVAV:
+        case SVt_PVHV:
+            if ((mg = mg_find(sv, PERL_MAGIC_tied))
+                && mg->mg_virtual == &sharedsv_array_vtbl) {
+                return ((SV *)mg->mg_ptr);
+            }
+            break;
+        default:
+            /* This should work for elements as well as they
+             * have scalar magic as well as their element magic
+             */
+            if ((mg = mg_find(sv, PERL_MAGIC_shared_scalar))
+                && mg->mg_virtual == &sharedsv_scalar_vtbl) {
+                return ((SV *)mg->mg_ptr);
+            }
+            break;
+        }
     }
     /* Just for tidyness of API also handle tie objects */
     if (SvROK(sv) && sv_derived_from(sv, "threads::shared::tie")) {
-	return S_sharedsv_from_obj(aTHX_ sv);
+        return (S_sharedsv_from_obj(aTHX_ sv));
     }
-    return NULL;
+    return (NULL);
 }
 
 
-/* associate a private SV  with a shared SV by pointing the appropriate
- * magics at it.  Assumes lock is held */
-
+/* Associate a private SV  with a shared SV by pointing the appropriate
+ * magics at it.
+ * Assumes lock is held.
+ */
 void
 Perl_sharedsv_associate(pTHX_ SV *sv, SV *ssv)
 {
@@ -403,46 +427,51 @@ Perl_sharedsv_associate(pTHX_ SV *sv, SV *ssv)
     switch(SvTYPE(sv)) {
     case SVt_PVAV:
     case SVt_PVHV:
-	if (!(mg = mg_find(sv, PERL_MAGIC_tied))
-	    || mg->mg_virtual != &sharedsv_array_vtbl
-	    || (SV*) mg->mg_ptr != ssv)
-	{
-	    SV *obj = newSV(0);
-	    sv_setref_iv(obj, "threads::shared::tie",PTR2IV(ssv));
-	    if (mg) {
-		sv_unmagic(sv, PERL_MAGIC_tied);
-	    }
-	    mg = sv_magicext(sv, obj, PERL_MAGIC_tied, &sharedsv_array_vtbl,
-			    (char *) ssv, 0);
-	    mg->mg_flags |= (MGf_COPY|MGf_DUP);
-	    SvREFCNT_inc(ssv);
-	    SvREFCNT_dec(obj);
-	}
-	break;
+        if (!(mg = mg_find(sv, PERL_MAGIC_tied))
+            || mg->mg_virtual != &sharedsv_array_vtbl
+            || (SV*) mg->mg_ptr != ssv)
+        {
+            SV *obj = newSV(0);
+            sv_setref_iv(obj, "threads::shared::tie", PTR2IV(ssv));
+            if (mg) {
+                sv_unmagic(sv, PERL_MAGIC_tied);
+            }
+            mg = sv_magicext(sv, obj, PERL_MAGIC_tied, &sharedsv_array_vtbl,
+                            (char *)ssv, 0);
+            mg->mg_flags |= (MGf_COPY|MGf_DUP);
+            SvREFCNT_inc_void(ssv);
+            SvREFCNT_dec(obj);
+        }
+        break;
 
     default:
-	if ((SvTYPE(sv) < SVt_PVMG)
-	    || !(mg = mg_find(sv, PERL_MAGIC_shared_scalar))
-	    || mg->mg_virtual != &sharedsv_scalar_vtbl
-	    || (SV*) mg->mg_ptr != ssv)
-	{
-	    if (mg) {
-		sv_unmagic(sv, PERL_MAGIC_shared_scalar);
-	    }
-	    mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar,
-			    &sharedsv_scalar_vtbl, (char *)ssv, 0);
-	    mg->mg_flags |= (MGf_DUP|MGf_LOCAL);
-	    SvREFCNT_inc(ssv);
-	}
-	break;
+        if ((SvTYPE(sv) < SVt_PVMG)
+            || !(mg = mg_find(sv, PERL_MAGIC_shared_scalar))
+            || mg->mg_virtual != &sharedsv_scalar_vtbl
+            || (SV*) mg->mg_ptr != ssv)
+        {
+            if (mg) {
+                sv_unmagic(sv, PERL_MAGIC_shared_scalar);
+            }
+            mg = sv_magicext(sv, Nullsv, PERL_MAGIC_shared_scalar,
+                            &sharedsv_scalar_vtbl, (char *)ssv, 0);
+            mg->mg_flags |= (MGf_DUP
+#ifdef MGf_LOCAL
+                                    |MGf_LOCAL
+#endif
+                            );
+            SvREFCNT_inc_void(ssv);
+        }
+        break;
     }
+
     assert ( Perl_sharedsv_find(aTHX_ sv) == ssv );
 }
 
 
 /* Given a private SV, create and return an associated shared SV.
- * Assumes lock is held */
-
+ * Assumes lock is held.
+ */
 STATIC SV *
 S_sharedsv_new_shared(pTHX_ SV *sv)
 {
@@ -454,17 +483,17 @@ S_sharedsv_new_shared(pTHX_ SV *sv)
 
     SHARED_CONTEXT;
     ssv = newSV(0);
-    SvREFCNT(ssv) = 0; /* will be upped to 1 by Perl_sharedsv_associate */
+    SvREFCNT(ssv) = 0; /* Will be upped to 1 by Perl_sharedsv_associate */
     sv_upgrade(ssv, SvTYPE(sv));
     CALLER_CONTEXT;
     Perl_sharedsv_associate(aTHX_ sv, ssv);
-    return ssv;
+    return (ssv);
 }
 
 
 /* Given a shared SV, create and return an associated private SV.
- * Assumes lock is held */
-
+ * Assumes lock is held.
+ */
 STATIC SV *
 S_sharedsv_new_private(pTHX_ SV *ssv)
 {
@@ -476,56 +505,57 @@ S_sharedsv_new_private(pTHX_ SV *ssv)
     sv = newSV(0);
     sv_upgrade(sv, SvTYPE(ssv));
     Perl_sharedsv_associate(aTHX_ sv, ssv);
-    return sv;
+    return (sv);
 }
 
 
-/* a threadsafe version of SvREFCNT_dec(ssv) */
+/* A threadsafe version of SvREFCNT_dec(ssv) */
 
 STATIC void
 S_sharedsv_dec(pTHX_ SV* ssv)
 {
-    if (!ssv)
-	return;
+    if (! ssv)
+        return;
     ENTER_LOCK;
     if (SvREFCNT(ssv) > 1) {
-	/* no side effects, so can do it lightweight */
-	SvREFCNT_dec(ssv);
-    }
-    else {
-	dTHXc;
-	SHARED_CONTEXT;
-	SvREFCNT_dec(ssv);
-	CALLER_CONTEXT;
+        /* No side effects, so can do it lightweight */
+        SvREFCNT_dec(ssv);
+    } else {
+        dTHXc;
+        SHARED_CONTEXT;
+        SvREFCNT_dec(ssv);
+        CALLER_CONTEXT;
     }
     LEAVE_LOCK;
 }
 
-/* implements Perl-level share() and :shared */
+
+/* Implements Perl-level share() and :shared */
 
 void
 Perl_sharedsv_share(pTHX_ SV *sv)
 {
     switch(SvTYPE(sv)) {
     case SVt_PVGV:
-	Perl_croak(aTHX_ "Cannot share globs yet");
-	break;
+        Perl_croak(aTHX_ "Cannot share globs yet");
+        break;
 
     case SVt_PVCV:
-	Perl_croak(aTHX_ "Cannot share subs yet");
-	break;
+        Perl_croak(aTHX_ "Cannot share subs yet");
+        break;
 
     default:
-	ENTER_LOCK;
-	(void) S_sharedsv_new_shared(aTHX_ sv);
-	LEAVE_LOCK;
-	SvSETMAGIC(sv);
-	break;
+        ENTER_LOCK;
+        (void) S_sharedsv_new_shared(aTHX_ sv);
+        LEAVE_LOCK;
+        SvSETMAGIC(sv);
+        break;
     }
 }
 
+
 #if defined(WIN32) || defined(OS2)
-#  define ABS2RELMILLI(abs)        \
+#  define ABS2RELMILLI(abs)             \
     do {                                \
         abs -= (double)time(NULL);      \
         if (abs > 0) { abs *= 1000; }   \
@@ -533,7 +563,7 @@ Perl_sharedsv_share(pTHX_ SV *sv)
     } while (0)
 #endif /* WIN32 || OS2 */
 
-/* do OS-specific condition timed wait */
+/* Do OS-specific condition timed wait */
 
 bool
 Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs)
@@ -559,7 +589,7 @@ Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs)
     }
     MUTEX_LOCK(mut);
     cond->waiters--;
-    return got_it;
+    return (got_it);
 #  else
 #    ifdef OS2
     int rc, got_it = 0;
@@ -575,8 +605,8 @@ Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs)
         croak_with_os2error("panic: cond_timedwait");
     if (rc == ERROR_INTERRUPT) errno = EINTR;
     MUTEX_LOCK(mut);
-    return got_it;
-#    else         /* hope you're I_PTHREAD! */
+    return (got_it);
+#    else         /* Hope you're I_PTHREAD! */
     struct timespec ts;
     int got_it = 0;
 
@@ -589,69 +619,65 @@ Perl_sharedsv_cond_timedwait(perl_cond *cond, perl_mutex *mut, double abs)
         case ETIMEDOUT:             break;
 #ifdef OEMVS
         case -1:
-	  if (errno == ETIMEDOUT || errno == EAGAIN)
-	    break;
+            if (errno == ETIMEDOUT || errno == EAGAIN)
+                break;
 #endif
         default:
             Perl_croak_nocontext("panic: cond_timedwait");
             break;
     }
-    return got_it;
+    return (got_it);
 #    endif /* OS2 */
 #  endif /* WIN32 */
 #endif /* NETWARE || FAKE_THREADS || I_MACH_CTHREADS */
 }
 
 
-/* given a shared RV, copy it's value to a private RV, also coping the
+/* Given a shared RV, copy it's value to a private RV, also copying the
  * object status of the referent.
  * If the private side is already an appropriate RV->SV combination, keep
  * it if possible.
  */
-
 STATIC void
 S_get_RV(pTHX_ SV *sv, SV *ssv) {
     SV *sobj = SvRV(ssv);
     SV *obj;
-    if ( ! (   SvROK(sv)
-	    && ((obj = SvRV(sv)))
-	    && (Perl_sharedsv_find(aTHX_ obj) == sobj)
-	    && (SvTYPE(obj) == SvTYPE(sobj))
-	    )
-	)
+    if (! (SvROK(sv) &&
+           ((obj = SvRV(sv))) &&
+           (Perl_sharedsv_find(aTHX_ obj) == sobj) &&
+           (SvTYPE(obj) == SvTYPE(sobj))))
     {
-    	/* can't reuse obj */
-	if (SvROK(sv))  {
-	    SvREFCNT_dec(SvRV(sv));
-	}
-	else {
-	    assert(SvTYPE(sv) >= SVt_RV);
-	    sv_setsv_nomg(sv, &PL_sv_undef);
-	    SvROK_on(sv);
-	}
-	obj = S_sharedsv_new_private(aTHX_ SvRV(ssv));
-	SvRV_set(sv, obj);
+        /* Can't reuse obj */
+        if (SvROK(sv)) {
+            SvREFCNT_dec(SvRV(sv));
+        } else {
+            assert(SvTYPE(sv) >= SVt_RV);
+            sv_setsv_nomg(sv, &PL_sv_undef);
+            SvROK_on(sv);
+        }
+        obj = S_sharedsv_new_private(aTHX_ SvRV(ssv));
+        SvRV_set(sv, obj);
     }
 
     if (SvOBJECT(obj)) {
-	/* remove any old blessing */
-	SvREFCNT_dec(SvSTASH(obj));
-	SvOBJECT_off(obj);
+        /* Remove any old blessing */
+        SvREFCNT_dec(SvSTASH(obj));
+        SvOBJECT_off(obj);
     }
     if (SvOBJECT(sobj)) {
-	/* add any new old blessing */
-	STRLEN len;
-	char* stash_ptr = SvPV((SV*) SvSTASH(sobj), len);
-	HV* stash = gv_stashpvn(stash_ptr, len, TRUE);
-	SvOBJECT_on(obj);
-	SvSTASH_set(obj, (HV*)SvREFCNT_inc(stash));
+        /* Add any new old blessing */
+        STRLEN len;
+        char* stash_ptr = SvPV((SV*) SvSTASH(sobj), len);
+        HV* stash = gv_stashpvn(stash_ptr, len, TRUE);
+        SvOBJECT_on(obj);
+        SvSTASH_set(obj, (HV*)SvREFCNT_inc(stash));
     }
 }
 
 
 /* ------------ PERL_MAGIC_shared_scalar(n) functions -------------- */
 
-/* get magic for PERL_MAGIC_shared_scalar(n) */
+/* Get magic for PERL_MAGIC_shared_scalar(n) */
 
 int
 sharedsv_scalar_mg_get(pTHX_ SV *sv, MAGIC *mg)
@@ -661,19 +687,18 @@ sharedsv_scalar_mg_get(pTHX_ SV *sv, MAGIC *mg)
 
     ENTER_LOCK;
     if (SvROK(ssv)) {
-	S_get_RV(aTHX_ sv, ssv);
-    }
-    else {
-	sv_setsv_nomg(sv, ssv);
+        S_get_RV(aTHX_ sv, ssv);
+    } else {
+        sv_setsv_nomg(sv, ssv);
     }
     LEAVE_LOCK;
-    return 0;
+    return (0);
 }
 
-/* copy the contents of a private SV to a shared SV:
- * used by various mg_set()-type functions.
- * Assumes lock is held */
-
+/* Copy the contents of a private SV to a shared SV.
+ * Used by various mg_set()-type functions.
+ * Assumes lock is held.
+ */
 void
 sharedsv_scalar_store(pTHX_ SV *sv, SV *ssv)
 {
@@ -682,43 +707,51 @@ sharedsv_scalar_store(pTHX_ SV *sv, SV *ssv)
 
     assert(PL_sharedsv_lock.owner == aTHX);
     if (SvROK(sv)) {
-	SV *obj = SvRV(sv);
-	SV *sobj = Perl_sharedsv_find(aTHX_ obj);
-	if (sobj) {
-	    SHARED_CONTEXT;
-	    SvUPGRADE(ssv, SVt_RV);
-	    sv_setsv_nomg(ssv, &PL_sv_undef);
-	    
-	    SvRV_set(ssv, SvREFCNT_inc(sobj));
-	    SvROK_on(ssv);
-	    if(SvOBJECT(obj)) {
-	      SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(obj)),0);
-	      SvOBJECT_on(sobj);
-	      SvSTASH_set(sobj, (HV*)fake_stash);
-	    }
-	    CALLER_CONTEXT;
-	}
-	else {
-	    allowed = FALSE;
-	}
-    }
-    else {
+        SV *obj = SvRV(sv);
+        SV *sobj = Perl_sharedsv_find(aTHX_ obj);
+        if (sobj) {
+            SHARED_CONTEXT;
+            SvUPGRADE(ssv, SVt_RV);
+            sv_setsv_nomg(ssv, &PL_sv_undef);
+
+            SvRV_set(ssv, SvREFCNT_inc(sobj));
+            SvROK_on(ssv);
+            if (SvOBJECT(sobj)) {
+                /* Remove any old blessing */
+                SvREFCNT_dec(SvSTASH(sobj));
+                SvOBJECT_off(sobj);
+            }
+            if (SvOBJECT(obj)) {
+              SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(obj)),0);
+              SvOBJECT_on(sobj);
+              SvSTASH_set(sobj, (HV*)fake_stash);
+            }
+            CALLER_CONTEXT;
+        } else {
+            allowed = FALSE;
+        }
+    } else {
         SvTEMP_off(sv);
-	SHARED_CONTEXT;
-	sv_setsv_nomg(ssv, sv);
-	if(SvOBJECT(sv)) {
-	  SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(sv)),0);
-	  SvOBJECT_on(ssv);
-	  SvSTASH_set(ssv, (HV*)fake_stash);
-	}
-	CALLER_CONTEXT;
+        SHARED_CONTEXT;
+        sv_setsv_nomg(ssv, sv);
+        if (SvOBJECT(ssv)) {
+            /* Remove any old blessing */
+            SvREFCNT_dec(SvSTASH(ssv));
+            SvOBJECT_off(ssv);
+        }
+        if (SvOBJECT(sv)) {
+          SV* fake_stash = newSVpv(HvNAME_get(SvSTASH(sv)),0);
+          SvOBJECT_on(ssv);
+          SvSTASH_set(ssv, (HV*)fake_stash);
+        }
+        CALLER_CONTEXT;
     }
     if (!allowed) {
-	Perl_croak(aTHX_ "Invalid value for shared scalar");
+        Perl_croak(aTHX_ "Invalid value for shared scalar");
     }
 }
 
-/* set magic for PERL_MAGIC_shared_scalar(n) */
+/* Set magic for PERL_MAGIC_shared_scalar(n) */
 
 int
 sharedsv_scalar_mg_set(pTHX_ SV *sv, MAGIC *mg)
@@ -727,23 +760,23 @@ sharedsv_scalar_mg_set(pTHX_ SV *sv, MAGIC *mg)
     assert(ssv);
     ENTER_LOCK;
     if (SvTYPE(ssv) < SvTYPE(sv)) {
-	dTHXc;
-	SHARED_CONTEXT;
-	sv_upgrade(ssv, SvTYPE(sv));
-	CALLER_CONTEXT;
+        dTHXc;
+        SHARED_CONTEXT;
+        sv_upgrade(ssv, SvTYPE(sv));
+        CALLER_CONTEXT;
     }
     sharedsv_scalar_store(aTHX_ sv, ssv);
     LEAVE_LOCK;
-    return 0;
+    return (0);
 }
 
-/* free magic for PERL_MAGIC_shared_scalar(n) */
+/* Free magic for PERL_MAGIC_shared_scalar(n) */
 
 int
 sharedsv_scalar_mg_free(pTHX_ SV *sv, MAGIC *mg)
 {
     S_sharedsv_dec(aTHX_ (SV*)mg->mg_ptr);
-    return 0;
+    return (0);
 }
 
 /*
@@ -752,10 +785,11 @@ sharedsv_scalar_mg_free(pTHX_ SV *sv, MAGIC *mg)
 int
 sharedsv_scalar_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
 {
-    SvREFCNT_inc(mg->mg_ptr);
-    return 0;
+    SvREFCNT_inc_void(mg->mg_ptr);
+    return (0);
 }
 
+#ifdef MGf_LOCAL
 /*
  * Called during local $shared
  */
@@ -765,32 +799,35 @@ sharedsv_scalar_mg_local(pTHX_ SV* nsv, MAGIC *mg)
     MAGIC *nmg;
     SV *ssv = (SV *) mg->mg_ptr;
     if (ssv) {
-	ENTER_LOCK;
-	SvREFCNT_inc(ssv);
-	LEAVE_LOCK;
+        ENTER_LOCK;
+        SvREFCNT_inc_void(ssv);
+        LEAVE_LOCK;
     }
     nmg = sv_magicext(nsv, mg->mg_obj, mg->mg_type, mg->mg_virtual,
-			    mg->mg_ptr, mg->mg_len);
+                           mg->mg_ptr, mg->mg_len);
     nmg->mg_flags   = mg->mg_flags;
     nmg->mg_private = mg->mg_private;
 
-    return 0;
+    return (0);
 }
+#endif
 
 MGVTBL sharedsv_scalar_vtbl = {
- sharedsv_scalar_mg_get,	/* get */
- sharedsv_scalar_mg_set,	/* set */
- 0,				/* len */
- 0,				/* clear */
- sharedsv_scalar_mg_free,	/* free */
- 0,				/* copy */
- sharedsv_scalar_mg_dup,	/* dup */
- sharedsv_scalar_mg_local	/* local */
+    sharedsv_scalar_mg_get,     /* get */
+    sharedsv_scalar_mg_set,     /* set */
+    0,                          /* len */
+    0,                          /* clear */
+    sharedsv_scalar_mg_free,    /* free */
+    0,                          /* copy */
+    sharedsv_scalar_mg_dup,     /* dup */
+#ifdef MGf_LOCAL
+    sharedsv_scalar_mg_local,   /* local */
+#endif
 };
 
 /* ------------ PERL_MAGIC_tiedelem(p) functions -------------- */
 
-/* get magic for PERL_MAGIC_tiedelem(p) */
+/* Get magic for PERL_MAGIC_tiedelem(p) */
 
 int
 sharedsv_elem_mg_FETCH(pTHX_ SV *sv, MAGIC *mg)
@@ -801,42 +838,39 @@ sharedsv_elem_mg_FETCH(pTHX_ SV *sv, MAGIC *mg)
 
     ENTER_LOCK;
     if (SvTYPE(saggregate) == SVt_PVAV) {
-	assert ( mg->mg_ptr == 0 );
-	SHARED_CONTEXT;
-	svp = av_fetch((AV*) saggregate, mg->mg_len, 0);
-    }
-    else {
-	char *key = mg->mg_ptr;
-	STRLEN len = mg->mg_len;
-	assert ( mg->mg_ptr != 0 );
-	if (mg->mg_len == HEf_SVKEY) {
-	   key = SvPV((SV *) mg->mg_ptr, len);
-	}
-	SHARED_CONTEXT;
-	svp = hv_fetch((HV*) saggregate, key, len, 0);
+        assert ( mg->mg_ptr == 0 );
+        SHARED_CONTEXT;
+        svp = av_fetch((AV*) saggregate, mg->mg_len, 0);
+    } else {
+        char *key = mg->mg_ptr;
+        STRLEN len = mg->mg_len;
+        assert ( mg->mg_ptr != 0 );
+        if (mg->mg_len == HEf_SVKEY) {
+           key = SvPV((SV *) mg->mg_ptr, len);
+        }
+        SHARED_CONTEXT;
+        svp = hv_fetch((HV*) saggregate, key, len, 0);
     }
     CALLER_CONTEXT;
     if (svp) {
-	/* Exists in the array */
-	if (SvROK(*svp)) {
-	    S_get_RV(aTHX_ sv, *svp);
-	}
-	else {
-	    /* XXX can this branch ever happen? DAPM */
-	    /* XXX assert("no such branch"); */
-	    Perl_sharedsv_associate(aTHX_ sv, *svp);
-	    sv_setsv(sv, *svp);
-	}
-    }
-    else {
-	/* Not in the array */
-	sv_setsv(sv, &PL_sv_undef);
+        /* Exists in the array */
+        if (SvROK(*svp)) {
+            S_get_RV(aTHX_ sv, *svp);
+        } else {
+            /* XXX Can this branch ever happen? DAPM */
+            /* XXX assert("no such branch"); */
+            Perl_sharedsv_associate(aTHX_ sv, *svp);
+            sv_setsv(sv, *svp);
+        }
+    } else {
+        /* Not in the array */
+        sv_setsv(sv, &PL_sv_undef);
     }
     LEAVE_LOCK;
-    return 0;
+    return (0);
 }
 
-/* set magic for PERL_MAGIC_tiedelem(p) */
+/* Set magic for PERL_MAGIC_tiedelem(p) */
 
 int
 sharedsv_elem_mg_STORE(pTHX_ SV *sv, MAGIC *mg)
@@ -851,27 +885,26 @@ sharedsv_elem_mg_STORE(pTHX_ SV *sv, MAGIC *mg)
     ENTER_LOCK;
     assert(saggregate);
     if (SvTYPE(saggregate) == SVt_PVAV) {
-	assert ( mg->mg_ptr == 0 );
-	SHARED_CONTEXT;
-	svp = av_fetch((AV*) saggregate, mg->mg_len, 1);
-    }
-    else {
-	char *key = mg->mg_ptr;
-	STRLEN len = mg->mg_len;
-	assert ( mg->mg_ptr != 0 );
-	if (mg->mg_len == HEf_SVKEY)
-	   key = SvPV((SV *) mg->mg_ptr, len);
-	SHARED_CONTEXT;
-	svp = hv_fetch((HV*) saggregate, key, len, 1);
+        assert ( mg->mg_ptr == 0 );
+        SHARED_CONTEXT;
+        svp = av_fetch((AV*) saggregate, mg->mg_len, 1);
+    } else {
+        char *key = mg->mg_ptr;
+        STRLEN len = mg->mg_len;
+        assert ( mg->mg_ptr != 0 );
+        if (mg->mg_len == HEf_SVKEY)
+           key = SvPV((SV *) mg->mg_ptr, len);
+        SHARED_CONTEXT;
+        svp = hv_fetch((HV*) saggregate, key, len, 1);
     }
     CALLER_CONTEXT;
     Perl_sharedsv_associate(aTHX_ sv, *svp);
     sharedsv_scalar_store(aTHX_ sv, *svp);
     LEAVE_LOCK;
-    return 0;
+    return (0);
 }
 
-/* clear magic for PERL_MAGIC_tiedelem(p) */
+/* Clear magic for PERL_MAGIC_tiedelem(p) */
 
 int
 sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg)
@@ -882,23 +915,22 @@ sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg)
     ENTER_LOCK;
     sharedsv_elem_mg_FETCH(aTHX_ sv, mg);
     if ((shmg = mg_find(sv, PERL_MAGIC_shared_scalar)))
-	sharedsv_scalar_mg_get(aTHX_ sv, shmg);
+        sharedsv_scalar_mg_get(aTHX_ sv, shmg);
     if (SvTYPE(saggregate) == SVt_PVAV) {
-	SHARED_CONTEXT;
-	av_delete((AV*) saggregate, mg->mg_len, G_DISCARD);
-    }
-    else {
-	char *key = mg->mg_ptr;
-	STRLEN len = mg->mg_len;
-	assert ( mg->mg_ptr != 0 );
-	if (mg->mg_len == HEf_SVKEY)
-	   key = SvPV((SV *) mg->mg_ptr, len);
-	SHARED_CONTEXT;
-	hv_delete((HV*) saggregate, key, len, G_DISCARD);
+        SHARED_CONTEXT;
+        av_delete((AV*) saggregate, mg->mg_len, G_DISCARD);
+    } else {
+        char *key = mg->mg_ptr;
+        STRLEN len = mg->mg_len;
+        assert ( mg->mg_ptr != 0 );
+        if (mg->mg_len == HEf_SVKEY)
+           key = SvPV((SV *) mg->mg_ptr, len);
+        SHARED_CONTEXT;
+        hv_delete((HV*) saggregate, key, len, G_DISCARD);
     }
     CALLER_CONTEXT;
     LEAVE_LOCK;
-    return 0;
+    return (0);
 }
 
 /* Called during cloning of PERL_MAGIC_tiedelem(p) magic in new
@@ -907,25 +939,27 @@ sharedsv_elem_mg_DELETE(pTHX_ SV *sv, MAGIC *mg)
 int
 sharedsv_elem_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
 {
-    SvREFCNT_inc(S_sharedsv_from_obj(aTHX_ mg->mg_obj));
+    SvREFCNT_inc_void(S_sharedsv_from_obj(aTHX_ mg->mg_obj));
     assert(mg->mg_flags & MGf_DUP);
-    return 0;
+    return (0);
 }
 
 MGVTBL sharedsv_elem_vtbl = {
- sharedsv_elem_mg_FETCH,	/* get */
- sharedsv_elem_mg_STORE,	/* set */
- 0,				/* len */
- sharedsv_elem_mg_DELETE,	/* clear */
- 0,				/* free */
- 0,				/* copy */
- sharedsv_elem_mg_dup,		/* dup */
- 0				/* local */
+    sharedsv_elem_mg_FETCH,     /* get */
+    sharedsv_elem_mg_STORE,     /* set */
+    0,                          /* len */
+    sharedsv_elem_mg_DELETE,    /* clear */
+    0,                          /* free */
+    0,                          /* copy */
+    sharedsv_elem_mg_dup,       /* dup */
+#ifdef MGf_LOCAL
+    0,                          /* local */
+#endif
 };
 
 /* ------------ PERL_MAGIC_tied(P) functions -------------- */
 
-/* len magic for PERL_MAGIC_tied(P) */
+/* Len magic for PERL_MAGIC_tied(P) */
 
 U32
 sharedsv_array_mg_FETCHSIZE(pTHX_ SV *sv, MAGIC *mg)
@@ -935,17 +969,16 @@ sharedsv_array_mg_FETCHSIZE(pTHX_ SV *sv, MAGIC *mg)
     U32 val;
     SHARED_EDIT;
     if (SvTYPE(ssv) == SVt_PVAV) {
-	val = av_len((AV*) ssv);
-    }
-    else {
-	/* not actually defined by tie API but ... */
-	val = HvKEYS((HV*) ssv);
+        val = av_len((AV*) ssv);
+    } else {
+        /* Not actually defined by tie API but ... */
+        val = HvKEYS((HV*) ssv);
     }
     SHARED_RELEASE;
-    return val;
+    return (val);
 }
 
-/* clear magic for PERL_MAGIC_tied(P) */
+/* Clear magic for PERL_MAGIC_tied(P) */
 
 int
 sharedsv_array_mg_CLEAR(pTHX_ SV *sv, MAGIC *mg)
@@ -954,38 +987,37 @@ sharedsv_array_mg_CLEAR(pTHX_ SV *sv, MAGIC *mg)
     SV *ssv = (SV *) mg->mg_ptr;
     SHARED_EDIT;
     if (SvTYPE(ssv) == SVt_PVAV) {
-	av_clear((AV*) ssv);
-    }
-    else {
-	hv_clear((HV*) ssv);
+        av_clear((AV*) ssv);
+    } else {
+        hv_clear((HV*) ssv);
     }
     SHARED_RELEASE;
-    return 0;
+    return (0);
 }
 
-/* free magic for PERL_MAGIC_tied(P) */
+/* Free magic for PERL_MAGIC_tied(P) */
 
 int
 sharedsv_array_mg_free(pTHX_ SV *sv, MAGIC *mg)
 {
     S_sharedsv_dec(aTHX_ (SV*)mg->mg_ptr);
-    return 0;
+    return (0);
 }
 
 /*
- * copy magic for PERL_MAGIC_tied(P)
+ * Copy magic for PERL_MAGIC_tied(P)
  * This is called when perl is about to access an element of
  * the array -
  */
 int
 sharedsv_array_mg_copy(pTHX_ SV *sv, MAGIC* mg,
-		       SV *nsv, const char *name, int namlen)
+                       SV *nsv, const char *name, int namlen)
 {
     MAGIC *nmg = sv_magicext(nsv,mg->mg_obj,
-			    toLOWER(mg->mg_type),&sharedsv_elem_vtbl,
-			    name, namlen);
+                            toLOWER(mg->mg_type),&sharedsv_elem_vtbl,
+                            name, namlen);
     nmg->mg_flags |= MGf_DUP;
-    return 1;
+    return (1);
 }
 
 /* Called during cloning of PERL_MAGIC_tied(P) magic in new thread */
@@ -993,20 +1025,22 @@ sharedsv_array_mg_copy(pTHX_ SV *sv, MAGIC* mg,
 int
 sharedsv_array_mg_dup(pTHX_ MAGIC *mg, CLONE_PARAMS *param)
 {
-    SvREFCNT_inc((SV*)mg->mg_ptr);
+    SvREFCNT_inc_void((SV*)mg->mg_ptr);
     assert(mg->mg_flags & MGf_DUP);
-    return 0;
+    return (0);
 }
 
 MGVTBL sharedsv_array_vtbl = {
- 0,				/* get */
- 0,				/* set */
- sharedsv_array_mg_FETCHSIZE,	/* len */
- sharedsv_array_mg_CLEAR,	/* clear */
- sharedsv_array_mg_free,	/* free */
- sharedsv_array_mg_copy,	/* copy */
- sharedsv_array_mg_dup,		/* dup */
- 0				/* local */
+    0,                          /* get */
+    0,                          /* set */
+    sharedsv_array_mg_FETCHSIZE,/* len */
+    sharedsv_array_mg_CLEAR,    /* clear */
+    sharedsv_array_mg_free,     /* free */
+    sharedsv_array_mg_copy,     /* copy */
+    sharedsv_array_mg_dup,      /* dup */
+#ifdef MGf_LOCAL
+    0,                          /* local */
+#endif
 };
 
 =for apidoc sharedsv_unlock
@@ -1034,23 +1068,23 @@ void
 Perl_sharedsv_lock(pTHX_ SV *ssv)
 {
     user_lock *ul;
-    if (!ssv)
-	return;
+    if (! ssv)
+        return;
     ul = S_get_userlock(aTHX_ ssv, 1);
     recursive_lock_acquire(aTHX_ &ul->lock, __FILE__, __LINE__);
 }
 
-/* handles calls from lock() builtin via PL_lockhook */
+/* Handles calls from lock() builtin via PL_lockhook */
 
 void
 Perl_sharedsv_locksv(pTHX_ SV *sv)
 {
     SV *ssv;
 
-    if(SvROK(sv))
-	sv = SvRV(sv);
+    if (SvROK(sv))
+        sv = SvRV(sv);
     ssv = Perl_sharedsv_find(aTHX_ sv);
-    if(!ssv)
+    if (!ssv)
        croak("lock can only be used on shared values");
     Perl_sharedsv_lock(aTHX_ ssv);
 }
@@ -1059,26 +1093,26 @@ Perl_sharedsv_locksv(pTHX_ SV *sv)
 
 =for apidoc sharedsv_init
 
-Saves a space for keeping SVs wider than an interpreter,
+Saves a space for keeping SVs wider than an interpreter.
 
 =cut
 
 void
 Perl_sharedsv_init(pTHX)
 {
-  dTHXc;
-  /* This pair leaves us in shared context ... */
-  PL_sharedsv_space = perl_alloc();
-  perl_construct(PL_sharedsv_space);
-  CALLER_CONTEXT;
-  recursive_lock_init(aTHX_ &PL_sharedsv_lock);
-  PL_lockhook = &Perl_sharedsv_locksv;
-  PL_sharehook = &Perl_sharedsv_share;
+    dTHXc;
+    /* This pair leaves us in shared context ... */
+    PL_sharedsv_space = perl_alloc();
+    perl_construct(PL_sharedsv_space);
+    CALLER_CONTEXT;
+    recursive_lock_init(aTHX_ &PL_sharedsv_lock);
+    PL_lockhook = &Perl_sharedsv_locksv;
+    PL_sharehook = &Perl_sharedsv_share;
 }
 
 #endif /* USE_ITHREADS */
 
-MODULE = threads::shared	PACKAGE = threads::shared::tie
+MODULE = threads::shared        PACKAGE = threads::shared::tie
 
 PROTOTYPES: DISABLE
 
@@ -1086,425 +1120,416 @@ PROTOTYPES: DISABLE
 
 void
 PUSH(SV *obj, ...)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	int i;
-	for(i = 1; i < items; i++) {
-	    SV* tmp = newSVsv(ST(i));
-	    SV *stmp;
-	    ENTER_LOCK;
-	    stmp = S_sharedsv_new_shared(aTHX_ tmp);
-	    sharedsv_scalar_store(aTHX_ tmp, stmp);
-	    SHARED_CONTEXT;
-	    av_push((AV*) sobj, stmp);
-	    SvREFCNT_inc(stmp);
-	    SHARED_RELEASE;
-	    SvREFCNT_dec(tmp);
-	}
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        int i;
+        for (i = 1; i < items; i++) {
+            SV* tmp = newSVsv(ST(i));
+            SV *stmp;
+            ENTER_LOCK;
+            stmp = S_sharedsv_new_shared(aTHX_ tmp);
+            sharedsv_scalar_store(aTHX_ tmp, stmp);
+            SHARED_CONTEXT;
+            av_push((AV*) sobj, stmp);
+            SvREFCNT_inc_void(stmp);
+            SHARED_RELEASE;
+            SvREFCNT_dec(tmp);
+        }
+
 
 void
 UNSHIFT(SV *obj, ...)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	int i;
-	ENTER_LOCK;
-	SHARED_CONTEXT;
-	av_unshift((AV*)sobj, items - 1);
-	CALLER_CONTEXT;
-	for(i = 1; i < items; i++) {
-	    SV *tmp = newSVsv(ST(i));
-	    SV *stmp = S_sharedsv_new_shared(aTHX_ tmp);
-	    sharedsv_scalar_store(aTHX_ tmp, stmp);
-	    SHARED_CONTEXT;
-	    av_store((AV*) sobj, i - 1, stmp);
-	    SvREFCNT_inc(stmp);
-	    CALLER_CONTEXT;
-	    SvREFCNT_dec(tmp);
-	}
-	LEAVE_LOCK;
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        int i;
+        ENTER_LOCK;
+        SHARED_CONTEXT;
+        av_unshift((AV*)sobj, items - 1);
+        CALLER_CONTEXT;
+        for (i = 1; i < items; i++) {
+            SV *tmp = newSVsv(ST(i));
+            SV *stmp = S_sharedsv_new_shared(aTHX_ tmp);
+            sharedsv_scalar_store(aTHX_ tmp, stmp);
+            SHARED_CONTEXT;
+            av_store((AV*) sobj, i - 1, stmp);
+            SvREFCNT_inc_void(stmp);
+            CALLER_CONTEXT;
+            SvREFCNT_dec(tmp);
+        }
+        LEAVE_LOCK;
+
 
 void
 POP(SV *obj)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	SV* ssv;
-	ENTER_LOCK;
-	SHARED_CONTEXT;
-	ssv = av_pop((AV*)sobj);
-	CALLER_CONTEXT;
-	ST(0) = sv_newmortal();
-	Perl_sharedsv_associate(aTHX_ ST(0), ssv);
-	SvREFCNT_dec(ssv);
-	LEAVE_LOCK;
-	XSRETURN(1);
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        SV* ssv;
+        ENTER_LOCK;
+        SHARED_CONTEXT;
+        ssv = av_pop((AV*)sobj);
+        CALLER_CONTEXT;
+        ST(0) = sv_newmortal();
+        Perl_sharedsv_associate(aTHX_ ST(0), ssv);
+        SvREFCNT_dec(ssv);
+        LEAVE_LOCK;
+        /* XSRETURN(1); - implied */
+
 
 void
 SHIFT(SV *obj)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	SV* ssv;
-	ENTER_LOCK;
-	SHARED_CONTEXT;
-	ssv = av_shift((AV*)sobj);
-	CALLER_CONTEXT;
-	ST(0) = sv_newmortal();
-	Perl_sharedsv_associate(aTHX_ ST(0), ssv);
-	SvREFCNT_dec(ssv);
-	LEAVE_LOCK;
-	XSRETURN(1);
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        SV* ssv;
+        ENTER_LOCK;
+        SHARED_CONTEXT;
+        ssv = av_shift((AV*)sobj);
+        CALLER_CONTEXT;
+        ST(0) = sv_newmortal();
+        Perl_sharedsv_associate(aTHX_ ST(0), ssv);
+        SvREFCNT_dec(ssv);
+        LEAVE_LOCK;
+        /* XSRETURN(1); - implied */
+
 
 void
 EXTEND(SV *obj, IV count)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	SHARED_EDIT;
-	av_extend((AV*)sobj, count);
-	SHARED_RELEASE;
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        SHARED_EDIT;
+        av_extend((AV*)sobj, count);
+        SHARED_RELEASE;
+
 
 void
 STORESIZE(SV *obj,IV count)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	SHARED_EDIT;
-	av_fill((AV*) sobj, count);
-	SHARED_RELEASE;
-
-
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        SHARED_EDIT;
+        av_fill((AV*) sobj, count);
+        SHARED_RELEASE;
 
 
 void
 EXISTS(SV *obj, SV *index)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	bool exists;
-	if (SvTYPE(sobj) == SVt_PVAV) {
-	    SHARED_EDIT;
-	    exists = av_exists((AV*) sobj, SvIV(index));
-	}
-	else {
-	    STRLEN len;
-	    char *key = SvPV(index,len);
-	    SHARED_EDIT;
-	    exists = hv_exists((HV*) sobj, key, len);
-	}
-	SHARED_RELEASE;
-	ST(0) = (exists) ? &PL_sv_yes : &PL_sv_no;
-	XSRETURN(1);
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        bool exists;
+        if (SvTYPE(sobj) == SVt_PVAV) {
+            SHARED_EDIT;
+            exists = av_exists((AV*) sobj, SvIV(index));
+        } else {
+            STRLEN len;
+            char *key = SvPV(index,len);
+            SHARED_EDIT;
+            exists = hv_exists((HV*) sobj, key, len);
+        }
+        SHARED_RELEASE;
+        ST(0) = (exists) ? &PL_sv_yes : &PL_sv_no;
+        /* XSRETURN(1); - implied */
 
 
 void
 FIRSTKEY(SV *obj)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	char* key = NULL;
-	I32 len = 0;
-	HE* entry;
-	ENTER_LOCK;
-	SHARED_CONTEXT;
-	hv_iterinit((HV*) sobj);
-	entry = hv_iternext((HV*) sobj);
-	if (entry) {
-		key = hv_iterkey(entry,&len);
-		CALLER_CONTEXT;
-		ST(0) = sv_2mortal(newSVpv(key, len));
-	} else {
-	     CALLER_CONTEXT;
-	     ST(0) = &PL_sv_undef;
-	}
-	LEAVE_LOCK;
-	XSRETURN(1);
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        char* key = NULL;
+        I32 len = 0;
+        HE* entry;
+        ENTER_LOCK;
+        SHARED_CONTEXT;
+        hv_iterinit((HV*) sobj);
+        entry = hv_iternext((HV*) sobj);
+        if (entry) {
+            key = hv_iterkey(entry,&len);
+            CALLER_CONTEXT;
+            ST(0) = sv_2mortal(newSVpv(key, len));
+        } else {
+            CALLER_CONTEXT;
+            ST(0) = &PL_sv_undef;
+        }
+        LEAVE_LOCK;
+        /* XSRETURN(1); - implied */
+
 
 void
 NEXTKEY(SV *obj, SV *oldkey)
-CODE:
-	dTHXc;
-	SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
-	char* key = NULL;
-	I32 len = 0;
-	HE* entry;
-	ENTER_LOCK;
-	SHARED_CONTEXT;
-	entry = hv_iternext((HV*) sobj);
-	if (entry) {
-		key = hv_iterkey(entry,&len);
-		CALLER_CONTEXT;
-		ST(0) = sv_2mortal(newSVpv(key, len));
-	} else {
-	     CALLER_CONTEXT;
-	     ST(0) = &PL_sv_undef;
-	}
-	LEAVE_LOCK;
-	XSRETURN(1);
-
-MODULE = threads::shared                PACKAGE = threads::shared
+    CODE:
+        dTHXc;
+        SV *sobj = S_sharedsv_from_obj(aTHX_ obj);
+        char* key = NULL;
+        I32 len = 0;
+        HE* entry;
+        ENTER_LOCK;
+        SHARED_CONTEXT;
+        entry = hv_iternext((HV*) sobj);
+        if (entry) {
+            key = hv_iterkey(entry,&len);
+            CALLER_CONTEXT;
+            ST(0) = sv_2mortal(newSVpv(key, len));
+        } else {
+            CALLER_CONTEXT;
+            ST(0) = &PL_sv_undef;
+        }
+        LEAVE_LOCK;
+        /* XSRETURN(1); - implied */
+
+
+MODULE = threads::shared        PACKAGE = threads::shared
 
 PROTOTYPES: ENABLE
 
 void
 _id(SV *ref)
-	PROTOTYPE: \[$@%]
-CODE:
-	SV *ssv;
-	ref = SvRV(ref);
-	if(SvROK(ref))
-	    ref = SvRV(ref);
-	if( (ssv = Perl_sharedsv_find(aTHX_ ref)) ){
-	    ST(0) = sv_2mortal(newSViv(PTR2IV(ssv)));
-	    XSRETURN(1);
-	}
-	XSRETURN_UNDEF;
+    PROTOTYPE: \[$@%]
+    PREINIT:
+        SV *ssv;
+    CODE:
+        ref = SvRV(ref);
+        if (SvROK(ref))
+            ref = SvRV(ref);
+        ssv = Perl_sharedsv_find(aTHX_ ref);
+        if (! ssv)
+            XSRETURN_UNDEF;
+        ST(0) = sv_2mortal(newSVuv(PTR2UV(ssv)));
+        /* XSRETURN(1); - implied */
 
 
 void
 _refcnt(SV *ref)
-	PROTOTYPE: \[$@%]
-CODE:
-	SV *ssv;
-	ref = SvRV(ref);
-	if(SvROK(ref))
-	    ref = SvRV(ref);
-	if( (ssv = Perl_sharedsv_find(aTHX_ ref)) ) {
-	    ST(0) = sv_2mortal(newSViv(SvREFCNT(ssv)));
-	    XSRETURN(1);
-	}
-	else {
-	     Perl_warn(aTHX_ "%" SVf " is not shared",ST(0));
-	}
-	XSRETURN_UNDEF;
-
-SV*
+    PROTOTYPE: \[$@%]
+    PREINIT:
+        SV *ssv;
+    CODE:
+        ref = SvRV(ref);
+        if (SvROK(ref))
+            ref = SvRV(ref);
+        ssv = Perl_sharedsv_find(aTHX_ ref);
+        if (! ssv) {
+            Perl_warn(aTHX_ "%" SVf " is not shared", ST(0));
+            XSRETURN_UNDEF;
+        }
+        ST(0) = sv_2mortal(newSViv(SvREFCNT(ssv)));
+        /* XSRETURN(1); - implied */
+
+
+void
 share(SV *ref)
-	PROTOTYPE: \[$@%]
-	CODE:
-	if(!SvROK(ref))
+    PROTOTYPE: \[$@%]
+    CODE:
+        if (! SvROK(ref))
             Perl_croak(aTHX_ "Argument to share needs to be passed as ref");
-	ref = SvRV(ref);
-	if(SvROK(ref))
-	    ref = SvRV(ref);
-	Perl_sharedsv_share(aTHX_ ref);
-	RETVAL = newRV(ref);
-    	OUTPUT:
-	RETVAL
+        ref = SvRV(ref);
+        if (SvROK(ref))
+            ref = SvRV(ref);
+        Perl_sharedsv_share(aTHX_ ref);
+        ST(0) = sv_2mortal(newRV_inc(ref));
+        /* XSRETURN(1); - implied */
 
-void
-lock_enabled(SV *ref)
-	PROTOTYPE: \[$@%]
-	CODE:
-	SV *ssv;
-	if(!SvROK(ref))
-            Perl_croak(aTHX_ "Argument to lock needs to be passed as ref");
-	ref = SvRV(ref);
-	if(SvROK(ref))
-	    ref = SvRV(ref);
-	ssv = Perl_sharedsv_find(aTHX_ ref);
-	if(!ssv)
-	   croak("lock can only be used on shared values");
-	Perl_sharedsv_lock(aTHX_ ssv);
 
 void
-cond_wait_enabled(SV *ref_cond, SV *ref_lock = 0)
-	PROTOTYPE: \[$@%];\[$@%]
-	PREINIT:
-	SV *ssv;
-	perl_cond* user_condition;
-	int locks;
-	int same = 0;
-	user_lock *ul;
-
-	CODE:
-	if (!ref_lock || ref_lock == ref_cond) same = 1;
-
-	if(!SvROK(ref_cond))
+cond_wait(SV *ref_cond, SV *ref_lock = 0)
+    PROTOTYPE: \[$@%];\[$@%]
+    PREINIT:
+        SV *ssv;
+        perl_cond* user_condition;
+        int locks;
+        user_lock *ul;
+    CODE:
+        if (!SvROK(ref_cond))
             Perl_croak(aTHX_ "Argument to cond_wait needs to be passed as ref");
-	ref_cond = SvRV(ref_cond);
-	if(SvROK(ref_cond))
-	    ref_cond = SvRV(ref_cond);
-	ssv = Perl_sharedsv_find(aTHX_ ref_cond);
-	if(!ssv)
-	    croak("cond_wait can only be used on shared values");
-	ul = S_get_userlock(aTHX_ ssv, 1);
-
-	user_condition = &ul->user_cond;
-	if (! same) {
-	    if (!SvROK(ref_lock))
-	        Perl_croak(aTHX_ "cond_wait lock needs to be passed as ref");
-	    ref_lock = SvRV(ref_lock);
-	    if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock);
-	    ssv = Perl_sharedsv_find(aTHX_ ref_lock);
-	    if (!ssv)
-	        croak("cond_wait lock must be a shared value");
-	    ul = S_get_userlock(aTHX_ ssv, 1);
-	}
-	if(ul->lock.owner != aTHX)
-	    croak("You need a lock before you can cond_wait");
-	/* Stealing the members of the lock object worries me - NI-S */
-	MUTEX_LOCK(&ul->lock.mutex);
-	ul->lock.owner = NULL;
-	locks = ul->lock.locks;
-	ul->lock.locks = 0;
-
-	/* since we are releasing the lock here we need to tell other
-	people that is ok to go ahead and use it */
-	COND_SIGNAL(&ul->lock.cond);
-	COND_WAIT(user_condition, &ul->lock.mutex);
-	while(ul->lock.owner != NULL) {
-	    /* OK -- must reacquire the lock */
-	    COND_WAIT(&ul->lock.cond, &ul->lock.mutex);
-	}
-	ul->lock.owner = aTHX;
-	ul->lock.locks = locks;
-	MUTEX_UNLOCK(&ul->lock.mutex);
+        ref_cond = SvRV(ref_cond);
+        if (SvROK(ref_cond))
+            ref_cond = SvRV(ref_cond);
+        ssv = Perl_sharedsv_find(aTHX_ ref_cond);
+        if (! ssv)
+            Perl_croak(aTHX_ "cond_wait can only be used on shared values");
+        ul = S_get_userlock(aTHX_ ssv, 1);
+
+        user_condition = &ul->user_cond;
+        if (ref_lock && (ref_cond != ref_lock)) {
+            if (!SvROK(ref_lock))
+                Perl_croak(aTHX_ "cond_wait lock needs to be passed as ref");
+            ref_lock = SvRV(ref_lock);
+            if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock);
+            ssv = Perl_sharedsv_find(aTHX_ ref_lock);
+            if (! ssv)
+                Perl_croak(aTHX_ "cond_wait lock must be a shared value");
+            ul = S_get_userlock(aTHX_ ssv, 1);
+        }
+        if (ul->lock.owner != aTHX)
+            croak("You need a lock before you can cond_wait");
+        /* Stealing the members of the lock object worries me - NI-S */
+        MUTEX_LOCK(&ul->lock.mutex);
+        ul->lock.owner = NULL;
+        locks = ul->lock.locks;
+        ul->lock.locks = 0;
+
+        /* Since we are releasing the lock here we need to tell other
+         * people that is ok to go ahead and use it */
+        COND_SIGNAL(&ul->lock.cond);
+        COND_WAIT(user_condition, &ul->lock.mutex);
+        while(ul->lock.owner != NULL) {
+            /* OK -- must reacquire the lock */
+            COND_WAIT(&ul->lock.cond, &ul->lock.mutex);
+        }
+        ul->lock.owner = aTHX;
+        ul->lock.locks = locks;
+        MUTEX_UNLOCK(&ul->lock.mutex);
+
 
 int
-cond_timedwait_enabled(SV *ref_cond, double abs, SV *ref_lock = 0)
-	PROTOTYPE: \[$@%]$;\[$@%]
-	PREINIT:
-	SV *ssv;
-	perl_cond* user_condition;
-	int locks;
-	int same = 0;
-	user_lock *ul;
-
-	CODE:
-	if (!ref_lock || ref_cond == ref_lock) same = 1;
-
-	if(!SvROK(ref_cond))
-	    Perl_croak(aTHX_ "Argument to cond_timedwait needs to be passed as ref");
-	ref_cond = SvRV(ref_cond);
-	if(SvROK(ref_cond))
-	    ref_cond = SvRV(ref_cond);
-	ssv = Perl_sharedsv_find(aTHX_ ref_cond);
-	if(!ssv)
-	    croak("cond_timedwait can only be used on shared values");
-	ul = S_get_userlock(aTHX_ ssv, 1);
-    
-	user_condition = &ul->user_cond;
-	if (! same) {
-	    if (!SvROK(ref_lock))
-	        Perl_croak(aTHX_ "cond_timedwait lock needs to be passed as ref");
-	    ref_lock = SvRV(ref_lock);
-	    if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock);
-	    ssv = Perl_sharedsv_find(aTHX_ ref_lock);
-	    if (!ssv)
-	        croak("cond_timedwait lock must be a shared value");
-	    ul = S_get_userlock(aTHX_ ssv, 1);
-	}
-	if(ul->lock.owner != aTHX)
-	    croak("You need a lock before you can cond_wait");
-
-	MUTEX_LOCK(&ul->lock.mutex);
-	ul->lock.owner = NULL;
-	locks = ul->lock.locks;
-	ul->lock.locks = 0;
-	/* since we are releasing the lock here we need to tell other
-	people that is ok to go ahead and use it */
-	COND_SIGNAL(&ul->lock.cond);
-	RETVAL = Perl_sharedsv_cond_timedwait(user_condition, &ul->lock.mutex, abs);
-	while (ul->lock.owner != NULL) {
-	    /* OK -- must reacquire the lock... */
-	    COND_WAIT(&ul->lock.cond, &ul->lock.mutex);
-	}
-	ul->lock.owner = aTHX;
-	ul->lock.locks = locks;
-	MUTEX_UNLOCK(&ul->lock.mutex);
-
-	if (RETVAL == 0)
+cond_timedwait(SV *ref_cond, double abs, SV *ref_lock = 0)
+    PROTOTYPE: \[$@%]$;\[$@%]
+    PREINIT:
+        SV *ssv;
+        perl_cond* user_condition;
+        int locks;
+        user_lock *ul;
+    CODE:
+        if (! SvROK(ref_cond))
+            Perl_croak(aTHX_ "Argument to cond_timedwait needs to be passed as ref");
+        ref_cond = SvRV(ref_cond);
+        if (SvROK(ref_cond))
+            ref_cond = SvRV(ref_cond);
+        ssv = Perl_sharedsv_find(aTHX_ ref_cond);
+        if (! ssv)
+            Perl_croak(aTHX_ "cond_timedwait can only be used on shared values");
+        ul = S_get_userlock(aTHX_ ssv, 1);
+
+        user_condition = &ul->user_cond;
+        if (ref_lock && (ref_cond != ref_lock)) {
+            if (! SvROK(ref_lock))
+                Perl_croak(aTHX_ "cond_timedwait lock needs to be passed as ref");
+            ref_lock = SvRV(ref_lock);
+            if (SvROK(ref_lock)) ref_lock = SvRV(ref_lock);
+            ssv = Perl_sharedsv_find(aTHX_ ref_lock);
+            if (! ssv)
+                Perl_croak(aTHX_ "cond_timedwait lock must be a shared value");
+            ul = S_get_userlock(aTHX_ ssv, 1);
+        }
+        if (ul->lock.owner != aTHX)
+            Perl_croak(aTHX_ "You need a lock before you can cond_wait");
+
+        MUTEX_LOCK(&ul->lock.mutex);
+        ul->lock.owner = NULL;
+        locks = ul->lock.locks;
+        ul->lock.locks = 0;
+        /* Since we are releasing the lock here we need to tell other
+         * people that is ok to go ahead and use it */
+        COND_SIGNAL(&ul->lock.cond);
+        RETVAL = Perl_sharedsv_cond_timedwait(user_condition, &ul->lock.mutex, abs);
+        while (ul->lock.owner != NULL) {
+            /* OK -- must reacquire the lock... */
+            COND_WAIT(&ul->lock.cond, &ul->lock.mutex);
+        }
+        ul->lock.owner = aTHX;
+        ul->lock.locks = locks;
+        MUTEX_UNLOCK(&ul->lock.mutex);
+
+        if (RETVAL == 0)
             XSRETURN_UNDEF;
-	OUTPUT:
-	RETVAL
+    OUTPUT:
+        RETVAL
 
-void
-cond_signal_enabled(SV *ref)
-	PROTOTYPE: \[$@%]
-	CODE:
-	SV *ssv;
-	user_lock *ul;
 
-	if(!SvROK(ref))
+void
+cond_signal(SV *ref)
+    PROTOTYPE: \[$@%]
+    PREINIT:
+        SV *ssv;
+        user_lock *ul;
+    CODE:
+        if (! SvROK(ref))
             Perl_croak(aTHX_ "Argument to cond_signal needs to be passed as ref");
-	ref = SvRV(ref);
-	if(SvROK(ref))
-	    ref = SvRV(ref);
-	ssv = Perl_sharedsv_find(aTHX_ ref);
-	if(!ssv)
-	    croak("cond_signal can only be used on shared values");
-	ul = S_get_userlock(aTHX_ ssv, 1);
-	if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX)
-	    Perl_warner(aTHX_ packWARN(WARN_THREADS),
-			    "cond_signal() called on unlocked variable");
-	COND_SIGNAL(&ul->user_cond);
+        ref = SvRV(ref);
+        if (SvROK(ref))
+            ref = SvRV(ref);
+        ssv = Perl_sharedsv_find(aTHX_ ref);
+        if (! ssv)
+            Perl_croak(aTHX_ "cond_signal can only be used on shared values");
+        ul = S_get_userlock(aTHX_ ssv, 1);
+        if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX) {
+            Perl_warner(aTHX_ packWARN(WARN_THREADS),
+                            "cond_signal() called on unlocked variable");
+        }
+        COND_SIGNAL(&ul->user_cond);
 
-void
-cond_broadcast_enabled(SV *ref)
-	PROTOTYPE: \[$@%]
-	CODE:
-	SV *ssv;
-	user_lock *ul;
 
-	if(!SvROK(ref))
+void
+cond_broadcast(SV *ref)
+    PROTOTYPE: \[$@%]
+    PREINIT:
+        SV *ssv;
+        user_lock *ul;
+    CODE:
+        if (! SvROK(ref))
             Perl_croak(aTHX_ "Argument to cond_broadcast needs to be passed as ref");
-	ref = SvRV(ref);
-	if(SvROK(ref))
-	    ref = SvRV(ref);
-	ssv = Perl_sharedsv_find(aTHX_ ref);
-	if(!ssv)
-	    croak("cond_broadcast can only be used on shared values");
-	ul = S_get_userlock(aTHX_ ssv, 1);
-	if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX)
-	    Perl_warner(aTHX_ packWARN(WARN_THREADS),
-			    "cond_broadcast() called on unlocked variable");
-	COND_BROADCAST(&ul->user_cond);
-
-
-SV*
+        ref = SvRV(ref);
+        if (SvROK(ref))
+            ref = SvRV(ref);
+        ssv = Perl_sharedsv_find(aTHX_ ref);
+        if (! ssv)
+            Perl_croak(aTHX_ "cond_broadcast can only be used on shared values");
+        ul = S_get_userlock(aTHX_ ssv, 1);
+        if (ckWARN(WARN_THREADS) && ul->lock.owner != aTHX) {
+            Perl_warner(aTHX_ packWARN(WARN_THREADS),
+                            "cond_broadcast() called on unlocked variable");
+        }
+        COND_BROADCAST(&ul->user_cond);
+
+
+void
 bless(SV* ref, ...);
-	PROTOTYPE: $;$
-	CODE:
-        {
-	  HV* stash;
-	  SV *ssv;
-	  if (items == 1)
-	    stash = CopSTASH(PL_curcop);
-	  else {
-	    SV* classname = ST(1);
-	    STRLEN len;
-	    char *ptr;
-	    
-	    if (classname && !SvGMAGICAL(classname) &&
-			!SvAMAGIC(classname) && SvROK(classname))
-	      Perl_croak(aTHX_ "Attempt to bless into a reference");
-	    ptr = SvPV(classname,len);
-	    if (ckWARN(WARN_MISC) && len == 0)
-	      Perl_warner(aTHX_ packWARN(WARN_MISC),
-			  "Explicit blessing to '' (assuming package main)");
-	    stash = gv_stashpvn(ptr, len, TRUE);
-	  }
-	  SvREFCNT_inc(ref);
-	  (void)sv_bless(ref, stash);
-	  RETVAL = ref;
-	  ssv = Perl_sharedsv_find(aTHX_ ref);
-	  if(ssv) {
-	    dTHXc;
-	    ENTER_LOCK;
-	    SHARED_CONTEXT;
-	    {
-	      SV* fake_stash = newSVpv(HvNAME_get(stash),0);
-	      (void)sv_bless(ssv,(HV*)fake_stash);
-	    }
-	    CALLER_CONTEXT;
-	    LEAVE_LOCK;
-	  }
-	}
-    	OUTPUT:
-	RETVAL		
+    PROTOTYPE: $;$
+    PREINIT:
+        HV* stash;
+        SV *ssv;
+    CODE:
+        if (items == 1) {
+            stash = CopSTASH(PL_curcop);
+        } else {
+            SV* classname = ST(1);
+            STRLEN len;
+            char *ptr;
+
+            if (classname &&
+                ! SvGMAGICAL(classname) &&
+                ! SvAMAGIC(classname) &&
+                SvROK(classname))
+            {
+                Perl_croak(aTHX_ "Attempt to bless into a reference");
+            }
+            ptr = SvPV(classname, len);
+            if (ckWARN(WARN_MISC) && len == 0) {
+                Perl_warner(aTHX_ packWARN(WARN_MISC),
+                        "Explicit blessing to '' (assuming package main)");
+            }
+            stash = gv_stashpvn(ptr, len, TRUE);
+        }
+        SvREFCNT_inc_void(ref);
+        (void)sv_bless(ref, stash);
+        ST(0) = sv_2mortal(ref);
+        ssv = Perl_sharedsv_find(aTHX_ ref);
+        if (ssv) {
+            dTHXc;
+            ENTER_LOCK;
+            SHARED_CONTEXT;
+            {
+                SV* fake_stash = newSVpv(HvNAME_get(stash), 0);
+                (void)sv_bless(ssv, (HV*)fake_stash);
+            }
+            CALLER_CONTEXT;
+            LEAVE_LOCK;
+        }
+        /* XSRETURN(1); - implied */
 
 #endif /* USE_ITHREADS */
 
diff --git a/ext/threads/shared/t/0nothread.t b/ext/threads/shared/t/0nothread.t
index 2042db37fc..0e5216e1cc 100644
--- a/ext/threads/shared/t/0nothread.t
+++ b/ext/threads/shared/t/0nothread.t
@@ -1,86 +1,88 @@
 use strict;
 use warnings;
-use Config;
+
 BEGIN {
-    require Test::More;
-    if ($Config{'useithreads'}) {
-	Test::More->import( tests => 53 );
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
     }
-    else {
-	Test::More->import(skip_all => "no useithreads");
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use Test::More (tests => 53);
+
+### Start of Testing ###
 
 my @array;
 my %hash;
 
 sub hash
 {
- my @val = @_;
- is(keys %hash, 0, "hash empty");
- $hash{0} = $val[0];
- is(keys %hash,1, "Assign grows hash");
- is($hash{0},$val[0],"Value correct");
- $hash{2} = $val[2];
- is(keys %hash,2, "Assign grows hash");
- is($hash{0},$val[0],"Value correct");
- is($hash{2},$val[2],"Value correct");
- $hash{1} = $val[1];
- is(keys %hash,3,"Size correct");
- my @keys = keys %hash;
- is(join(',',sort @keys),'0,1,2',"Keys correct");
- my @hval = @hash{0,1,2};
- is(join(',',@hval),join(',',@val),"Values correct");
- my $val = delete $hash{1};
- is($val,$val[1],"Delete value correct");
- is(keys %hash,2,"Size correct");
- while (my ($k,$v) = each %hash)
-  {
-   is($v,$val[$k],"each works");
-  }
- %hash = ();
- is(keys %hash,0,"Clear hash");
+    my @val = @_;
+    is(keys %hash, 0, "hash empty");
+    $hash{0} = $val[0];
+    is(keys %hash,1, "Assign grows hash");
+    is($hash{0},$val[0],"Value correct");
+    $hash{2} = $val[2];
+    is(keys %hash,2, "Assign grows hash");
+    is($hash{0},$val[0],"Value correct");
+    is($hash{2},$val[2],"Value correct");
+    $hash{1} = $val[1];
+    is(keys %hash,3,"Size correct");
+    my @keys = keys %hash;
+    is(join(',',sort @keys),'0,1,2',"Keys correct");
+    my @hval = @hash{0,1,2};
+    is(join(',',@hval),join(',',@val),"Values correct");
+    my $val = delete $hash{1};
+    is($val,$val[1],"Delete value correct");
+    is(keys %hash,2,"Size correct");
+    while (my ($k,$v) = each %hash) {
+        is($v,$val[$k],"each works");
+    }
+    %hash = ();
+    is(keys %hash,0,"Clear hash");
 }
 
 sub array
 {
- my @val = @_;
- is(@array, 0, "array empty");
- $array[0] = $val[0];
- is(@array,1, "Assign grows array");
- is($array[0],$val[0],"Value correct");
- unshift(@array,$val[2]);
- is($array[0],$val[2],"Unshift worked");
- is($array[-1],$val[0],"-ve index");
- push(@array,$val[1]);
- is($array[-1],$val[1],"Push worked");
- is(@array,3,"Size correct");
- is(shift(@array),$val[2],"Shift worked");
- is(@array,2,"Size correct");
- is(pop(@array),$val[1],"Pop worked");
- is(@array,1,"Size correct");
- @array = ();
- is(@array,0,"Clear array");
+    my @val = @_;
+    is(@array, 0, "array empty");
+    $array[0] = $val[0];
+    is(@array,1, "Assign grows array");
+    is($array[0],$val[0],"Value correct");
+    unshift(@array,$val[2]);
+    is($array[0],$val[2],"Unshift worked");
+    is($array[-1],$val[0],"-ve index");
+    push(@array,$val[1]);
+    is($array[-1],$val[1],"Push worked");
+    is(@array,3,"Size correct");
+    is(shift(@array),$val[2],"Shift worked");
+    is(@array,2,"Size correct");
+    is(pop(@array),$val[1],"Pop worked");
+    is(@array,1,"Size correct");
+    @array = ();
+    is(@array,0,"Clear array");
 }
 
 ok((require threads::shared),"Require module");
 
-array(24,[],'Thing');
-hash(24,[],'Thing');
+if ($threads::shared::VERSION && ! exists($ENV{'PERL_CORE'})) {
+    diag('Testing threads::shared ' . $threads::shared::VERSION);
+}
 
+array(24, [], 'Thing');
+hash(24, [], 'Thing');
 
 import threads::shared;
-share(\@array);
-
-#SKIP:
-# {
-#  skip("Wibble",1);
-#  ok(0,"No it isn't");
-# }
 
-array(24,42,'Thing');
+share(\@array);
+array(24, 42, 'Thing');
 
 share(\%hash);
-hash(24,42,'Thing');
+hash(24, 42, 'Thing');
 
+# EOF
diff --git a/ext/threads/shared/t/av_refs.t b/ext/threads/shared/t/av_refs.t
index 9a2ec912ca..431ec33171 100644
--- a/ext/threads/shared/t/av_refs.t
+++ b/ext/threads/shared/t/av_refs.t
@@ -1,69 +1,97 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..11\n" };
+BEGIN {
+    $| = 1;
+    print("1..14\n");   ### Number of tests that will be run ###
+};
+
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
 
 my $sv;
 share($sv);
 $sv = "hi";
+
 my @av;
 share(@av);
-push @av, $sv;
-ok(2, $av[0] eq "hi");
-push @av, "foo";
-ok(3, $av[1] eq 'foo');
-my $av = threads->create(sub {	
-    my $av;	
+push(@av, $sv);
+
+ok(2, $av[0] eq "hi", 'Array holds value');
+
+push(@av, "foo");
+ok(3, $av[1] eq 'foo', 'Array holds 2nd value');
+
+my $av = threads->create(sub {
+    my $av;
     my @av2;
     share($av);
     share(@av2);
     $av = \@av2;
-    push @$av, "bar", \@av;
-    return $av;
+    push(@$av, "bar", \@av);
+    return ($av);
 })->join();
-ok(4,$av->[0] eq "bar");
-ok(5,$av->[1]->[0] eq 'hi');
+
+ok(4,$av->[0] eq "bar", 'Thread added to array');
+ok(5,$av->[1]->[0] eq 'hi', 'Shared in shared');
+
 threads->create(sub { $av[0] = "hihi" })->join();
-ok(6,$av->[1]->[0] eq 'hihi');
-ok(7, pop(@{$av->[1]}) eq "foo");
-ok(8, scalar(@{$av->[1]}) == 1);
+ok(6,$av->[1]->[0] eq 'hihi', 'Replaced shared in shared');
+ok(7, pop(@{$av->[1]}) eq "foo", 'Pop shared array');
+ok(8, scalar(@{$av->[1]}) == 1, 'Array size');
+
 threads->create(sub { @$av = () })->join();
-threads->create(sub { ok(9, scalar @$av == 0)})->join();
-threads->create(sub { unshift(@$av, threads->create(sub { my @array; share(@array); return \@array})->join())})->join();
-ok(10, ref($av->[0]) eq 'ARRAY');
-threads->create(sub { push @{$av->[0]}, \@av })->join();
-threads->create(sub { $av[0] = 'testtest'})->join();
-threads->create(sub { ok(11, $av->[0]->[0]->[0] eq 'testtest')})->join();
+threads->create(sub { ok(9, scalar @$av == 0, 'Array cleared in thread'); })->join();
 
+threads->create(sub {
+    unshift(@$av, threads->create(sub {
+                        my @array;
+                        share(@array);
+                        return (\@array);
+                  })->join());
+})->join();
 
+ok(10, ref($av->[0]) eq 'ARRAY', 'Array in array');
 
+threads->create(sub { push @{$av->[0]}, \@av })->join();
+threads->create(sub { $av[0] = 'testtest'})->join();
+threads->create(sub { ok(11, $av->[0]->[0]->[0] eq 'testtest', 'Nested'); })->join();
 
+ok(12, is_shared($sv), "Check for sharing");
+ok(13, is_shared(@av), "Check for sharing");
 
+my $x :shared;
+ok(14, is_shared($x), "Check for sharing");
 
+# EOF
diff --git a/ext/threads/shared/t/av_simple.t b/ext/threads/shared/t/av_simple.t
index f89efeec90..66fd732aff 100644
--- a/ext/threads/shared/t/av_simple.t
+++ b/ext/threads/shared/t/av_simple.t
@@ -1,36 +1,45 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
+BEGIN {
+    $| = 1;
+    print("1..44\n");   ### Number of tests that will be run ###
+};
 
-
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..43\n" };
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
+
 my @foo;
 share(@foo);
 ok(2,1,"shared \@foo");
@@ -118,7 +127,11 @@ ok(37, !defined delete($foo[0]), "Check that delete works from a thread");
 }
 {
     eval {
-	my @t1 = splice(@foo,0,2,"hop", "hej");
+        my @t1 = splice(@foo,0,2,"hop", "hej");
     };
     ok(43, my $temp1 = $@ =~/Splice not implemented for shared arrays/, "Check that the warning message is correct for non splice");
 }
+
+ok(44, is_shared(@foo), "Check for sharing");
+
+# EOF
diff --git a/ext/threads/shared/t/blessed.t b/ext/threads/shared/t/blessed.t
index 78e68c13bc..157bb53dcb 100644
--- a/ext/threads/shared/t/blessed.t
+++ b/ext/threads/shared/t/blessed.t
@@ -1,38 +1,44 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
-sub skip {
-    my ($id, $ok, $name) = @_;
-    print "ok $id # skip _thrcnt - $name \n";
-}
+BEGIN {
+    $| = 1;
+    print("1..37\n");   ### Number of tests that will be run ###
+};
 
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..36\n" };
 use threads;
 use threads::shared;
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
 
 my ($hobj, $aobj, $sobj) : shared;
 
@@ -60,38 +66,38 @@ threads->new(sub {
                 $$sobj = 3;
 
                 # Test objects in child thread
-                ok(1, ref($hobj) eq 'foo', "hash blessing does work");
-                ok(2, ref($aobj) eq 'bar', "array blessing does work");
-                ok(3, ref($sobj) eq 'baz', "scalar blessing does work");
-                ok(4, $$sobj eq '3', "scalar contents okay");
+                ok(2, ref($hobj) eq 'foo', "hash blessing does work");
+                ok(3, ref($aobj) eq 'bar', "array blessing does work");
+                ok(4, ref($sobj) eq 'baz', "scalar blessing does work");
+                ok(5, $$sobj eq '3', "scalar contents okay");
 
-                ok(5, ref($$aobj[0]) eq 'yin', "blessed hash in array");
-                ok(6, ref($$aobj[1]) eq 'yang', "blessed array in array");
-                ok(7, ref($$aobj[2]) eq 'baz', "blessed scalar in array");
-                ok(8, ${$$aobj[2]} eq '3', "blessed scalar in array contents");
+                ok(6, ref($$aobj[0]) eq 'yin', "blessed hash in array");
+                ok(7, ref($$aobj[1]) eq 'yang', "blessed array in array");
+                ok(8, ref($$aobj[2]) eq 'baz', "blessed scalar in array");
+                ok(9, ${$$aobj[2]} eq '3', "blessed scalar in array contents");
 
-                ok(9, ref($$hobj{'hash'}) eq 'yin', "blessed hash in hash");
-                ok(10, ref($$hobj{'array'}) eq 'yang', "blessed array in hash");
-                ok(11, ref($$hobj{'scalar'}) eq 'baz', "blessed scalar in hash");
-                ok(12, ${$$hobj{'scalar'}} eq '3', "blessed scalar in hash contents");
+                ok(10, ref($$hobj{'hash'}) eq 'yin', "blessed hash in hash");
+                ok(11, ref($$hobj{'array'}) eq 'yang', "blessed array in hash");
+                ok(12, ref($$hobj{'scalar'}) eq 'baz', "blessed scalar in hash");
+                ok(13, ${$$hobj{'scalar'}} eq '3', "blessed scalar in hash contents");
 
              })->join;
 
 # Test objects in parent thread
-ok(13, ref($hobj) eq 'foo', "hash blessing does work");
-ok(14, ref($aobj) eq 'bar', "array blessing does work");
-ok(15, ref($sobj) eq 'baz', "scalar blessing does work");
-ok(16, $$sobj eq '3', "scalar contents okay");
+ok(14, ref($hobj) eq 'foo', "hash blessing does work");
+ok(15, ref($aobj) eq 'bar', "array blessing does work");
+ok(16, ref($sobj) eq 'baz', "scalar blessing does work");
+ok(17, $$sobj eq '3', "scalar contents okay");
 
-ok(17, ref($$aobj[0]) eq 'yin', "blessed hash in array");
-ok(18, ref($$aobj[1]) eq 'yang', "blessed array in array");
-ok(19, ref($$aobj[2]) eq 'baz', "blessed scalar in array");
-ok(20, ${$$aobj[2]} eq '3', "blessed scalar in array contents");
+ok(18, ref($$aobj[0]) eq 'yin', "blessed hash in array");
+ok(19, ref($$aobj[1]) eq 'yang', "blessed array in array");
+ok(20, ref($$aobj[2]) eq 'baz', "blessed scalar in array");
+ok(21, ${$$aobj[2]} eq '3', "blessed scalar in array contents");
 
-ok(21, ref($$hobj{'hash'}) eq 'yin', "blessed hash in hash");
-ok(22, ref($$hobj{'array'}) eq 'yang', "blessed array in hash");
-ok(23, ref($$hobj{'scalar'}) eq 'baz', "blessed scalar in hash");
-ok(24, ${$$hobj{'scalar'}} eq '3', "blessed scalar in hash contents");
+ok(22, ref($$hobj{'hash'}) eq 'yin', "blessed hash in hash");
+ok(23, ref($$hobj{'array'}) eq 'yang', "blessed array in hash");
+ok(24, ref($$hobj{'scalar'}) eq 'baz', "blessed scalar in hash");
+ok(25, ${$$hobj{'scalar'}} eq '3', "blessed scalar in hash contents");
 
 threads->new(sub {
                 # Rebless objects
@@ -117,18 +123,19 @@ threads->new(sub {
              })->join;
 
 # Test reblessing
-ok(25, ref($hobj) eq 'oof', "hash reblessing does work");
-ok(26, ref($aobj) eq 'rab', "array reblessing does work");
-ok(27, ref($sobj) eq 'zab', "scalar reblessing does work");
-ok(28, $$sobj eq 'test', "scalar contents okay");
-
-ok(29, ref($$aobj[0]) eq 'niy', "reblessed hash in array");
-ok(30, ref($$aobj[1]) eq 'gnay', "reblessed array in array");
-ok(31, ref($$aobj[2]) eq 'zab', "reblessed scalar in array");
-ok(32, ${$$aobj[2]} eq 'test', "reblessed scalar in array contents");
-
-ok(33, ref($$hobj{'hash'}) eq 'niy', "reblessed hash in hash");
-ok(34, ref($$hobj{'array'}) eq 'gnay', "reblessed array in hash");
-ok(35, ref($$hobj{'scalar'}) eq 'zab', "reblessed scalar in hash");
-ok(36, ${$$hobj{'scalar'}} eq 'test', "reblessed scalar in hash contents");
-
+ok(26, ref($hobj) eq 'oof', "hash reblessing does work");
+ok(27, ref($aobj) eq 'rab', "array reblessing does work");
+ok(28, ref($sobj) eq 'zab', "scalar reblessing does work");
+ok(29, $$sobj eq 'test', "scalar contents okay");
+
+ok(30, ref($$aobj[0]) eq 'niy', "reblessed hash in array");
+ok(31, ref($$aobj[1]) eq 'gnay', "reblessed array in array");
+ok(32, ref($$aobj[2]) eq 'zab', "reblessed scalar in array");
+ok(33, ${$$aobj[2]} eq 'test', "reblessed scalar in array contents");
+
+ok(34, ref($$hobj{'hash'}) eq 'niy', "reblessed hash in hash");
+ok(35, ref($$hobj{'array'}) eq 'gnay', "reblessed array in hash");
+ok(36, ref($$hobj{'scalar'}) eq 'zab', "reblessed scalar in hash");
+ok(37, ${$$hobj{'scalar'}} eq 'test', "reblessed scalar in hash contents");
+
+# EOF
diff --git a/ext/threads/shared/t/cond.t b/ext/threads/shared/t/cond.t
index 82fa886c37..b60f217dd4 100644
--- a/ext/threads/shared/t/cond.t
+++ b/ext/threads/shared/t/cond.t
@@ -1,39 +1,49 @@
+use strict;
 use warnings;
 
 BEGIN {
-    chdir 't' if -d 't';
-    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no threads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
-$|++;
-print "1..31\n";
-use strict;
 
+use ExtUtils::testlib;
 
-use threads;
+my $Base = 0;
+sub ok {
+    my ($id, $ok, $name) = @_;
+    $id += $Base;
+
+    # You have to do it this way or VMS will get confused.
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-use threads::shared;
+    return ($ok);
+}
 
-# We can't use the normal ok() type stuff here, as part of the test is
-# to check that the numbers get printed in the right order. Instead, we
-# set a 'base' number for each part of the test and specify the ok()
-# number as an offset from that base.
+BEGIN {
+    $| = 1;
+    print("1..32\n");   ### Number of tests that will be run ###
+};
 
-my $Base = 0;
+use threads;
+use threads::shared;
+ok(1, 1, 'Loaded');
+$Base++;
 
-sub ok {
-    my ($offset, $bool, $text) = @_;
-    my $not = '';
-    $not = "not " unless $bool;
-    print "${not}ok " . ($Base + $offset) . " - $text\n";
-}
+### Start of Testing ###
 
 # test locking
-
 {
     my $lock : shared;
     my $tr;
@@ -41,14 +51,14 @@ sub ok {
     # test that a subthread can't lock until parent thread has unlocked
 
     {
-	lock($lock);
-	ok(1,1,"set first lock");
-	$tr = async {
-	    lock($lock);
-	    ok(3,1,"set lock in subthread");
-	};
-	threads->yield;
-	ok(2,1,"still got lock");
+        lock($lock);
+        ok(1, 1, "set first lock");
+        $tr = async {
+            lock($lock);
+            ok(3, 1, "set lock in subthread");
+        };
+        threads->yield;
+        ok(2, 1, "still got lock");
     }
     $tr->join;
 
@@ -57,15 +67,15 @@ sub ok {
     # ditto with ref to thread
 
     {
-	my $lockref = \$lock;
-	lock($lockref);
-	ok(1,1,"set first lockref");
-	$tr = async {
-	    lock($lockref);
-	    ok(3,1,"set lockref in subthread");
-	};
-	threads->yield;
-	ok(2,1,"still got lockref");
+        my $lockref = \$lock;
+        lock($lockref);
+        ok(1,1,"set first lockref");
+        $tr = async {
+            lock($lockref);
+            ok(3,1,"set lockref in subthread");
+        };
+        threads->yield;
+        ok(2,1,"still got lockref");
     }
     $tr->join;
 
@@ -73,35 +83,35 @@ sub ok {
 
     # make sure recursive locks unlock at the right place
     {
-	lock($lock);
-	ok(1,1,"set first recursive lock");
-	lock($lock);
-	threads->yield;
-	{
-	    lock($lock);
-	    threads->yield;
-	}
-	$tr = async {
-	    lock($lock);
-	    ok(3,1,"set recursive lock in subthread");
-	};
-	{
-	    lock($lock);
-	    threads->yield;
-	    {
-		lock($lock);
-		threads->yield;
-		lock($lock);
-		threads->yield;
-	    }
-	}
-	ok(2,1,"still got recursive lock");
+        lock($lock);
+        ok(1,1,"set first recursive lock");
+        lock($lock);
+        threads->yield;
+        {
+            lock($lock);
+            threads->yield;
+        }
+        $tr = async {
+            lock($lock);
+            ok(3,1,"set recursive lock in subthread");
+        };
+        {
+            lock($lock);
+            threads->yield;
+            {
+                lock($lock);
+                threads->yield;
+                lock($lock);
+                threads->yield;
+            }
+        }
+        ok(2,1,"still got recursive lock");
     }
     $tr->join;
 
     $Base += 3;
 
-    # Make sure a lock factory gives out fresh locks each time 
+    # Make sure a lock factory gives out fresh locks each time
     # for both attribute and run-time shares
 
     sub lock_factory1 { my $lock : shared; return \$lock; }
@@ -120,38 +130,37 @@ sub ok {
     lock $locks1[3];
     ok(2,1,"lock factory: locked all locks");
     $tr = async {
-	ok(3,1,"lock factory: child: locking all locks");
-	lock $locks2[0];
-	lock $locks2[1];
-	lock $locks2[2];
-	lock $locks2[3];
-	ok(4,1,"lock factory: child: locked all locks");
+        ok(3,1,"lock factory: child: locking all locks");
+        lock $locks2[0];
+        lock $locks2[1];
+        lock $locks2[2];
+        lock $locks2[3];
+        ok(4,1,"lock factory: child: locked all locks");
     };
     $tr->join;
-	
+
     $Base += 4;
 }
 
 # test cond_signal()
-
 {
     my $lock : shared;
 
     sub foo {
-	lock($lock);
-	ok(1,1,"cond_signal: created first lock");
-	my $tr2 = threads->create(\&bar);
-	cond_wait($lock);
-	$tr2->join();
-	ok(5,1,"cond_signal: joined");
+        lock($lock);
+        ok(1,1,"cond_signal: created first lock");
+        my $tr2 = threads->create(\&bar);
+        cond_wait($lock);
+        $tr2->join();
+        ok(5,1,"cond_signal: joined");
     }
 
     sub bar {
-	ok(2,1,"cond_signal: child before lock");
-	lock($lock);
-	ok(3,1,"cond_signal: child locked");
-	cond_signal($lock);
-	ok(4,1,"cond_signal: signalled");
+        ok(2,1,"cond_signal: child before lock");
+        lock($lock);
+        ok(3,1,"cond_signal: child locked");
+        cond_signal($lock);
+        ok(4,1,"cond_signal: signalled");
     }
 
     my $tr  = threads->create(\&foo);
@@ -163,20 +172,20 @@ sub ok {
 
     my $lockref = \$lock;
     sub foo2 {
-	lock($lockref);
-	ok(1,1,"cond_signal: ref: created first lock");
-	my $tr2 = threads->create(\&bar2);
-	cond_wait($lockref);
-	$tr2->join();
-	ok(5,1,"cond_signal: ref: joined");
+        lock($lockref);
+        ok(1,1,"cond_signal: ref: created first lock");
+        my $tr2 = threads->create(\&bar2);
+        cond_wait($lockref);
+        $tr2->join();
+        ok(5,1,"cond_signal: ref: joined");
     }
 
     sub bar2 {
-	ok(2,1,"cond_signal: ref: child before lock");
-	lock($lockref);
-	ok(3,1,"cond_signal: ref: child locked");
-	cond_signal($lockref);
-	ok(4,1,"cond_signal: ref: signalled");
+        ok(2,1,"cond_signal: ref: child before lock");
+        lock($lockref);
+        ok(3,1,"cond_signal: ref: child locked");
+        cond_signal($lockref);
+        ok(4,1,"cond_signal: ref: signalled");
     }
 
     $tr  = threads->create(\&foo2);
@@ -188,7 +197,6 @@ sub ok {
 
 
 # test cond_broadcast()
-
 {
     my $counter : shared = 0;
 
@@ -198,27 +206,26 @@ sub ok {
     # cond_broadcast to wake all its ancestors.
 
     sub broad {
-	my $n = shift;
-	my $th;
-	{
-	    lock($counter);
-	    if ($n > 0) {
-		$counter++;
-		$th = threads->new(\&broad, $n-1);
-		cond_wait($counter);
-		$counter += 10;
-	    }
-	    else {
-		ok(1, $counter == 3, "cond_broadcast: all three waiting");
-		cond_broadcast($counter);
-	    }
-	}
-	$th->join if $th;
+        my $n = shift;
+        my $th;
+        {
+            lock($counter);
+            if ($n > 0) {
+                $counter++;
+                $th = threads->new(\&broad, $n-1);
+                cond_wait($counter);
+                $counter += 10;
+            }
+            else {
+                ok(1, $counter == 3, "cond_broadcast: all three waiting");
+                cond_broadcast($counter);
+            }
+        }
+        $th->join if $th;
     }
 
     threads->new(\&broad, 3)->join;
     ok(2, $counter == 33, "cond_broadcast: all three threads woken");
-    print "# counter=$counter\n";
 
     $Base += 2;
 
@@ -230,34 +237,33 @@ sub ok {
     my $r = \$counter2;
 
     sub broad2 {
-	my $n = shift;
-	my $th;
-	{
-	    lock($r);
-	    if ($n > 0) {
-		$$r++;
-		$th = threads->new(\&broad2, $n-1);
-		cond_wait($r);
-		$$r += 10;
-	    }
-	    else {
-		ok(1, $$r == 3, "cond_broadcast: ref: all three waiting");
-		cond_broadcast($r);
-	    }
-	}
-	$th->join if $th;
+        my $n = shift;
+        my $th;
+        {
+            lock($r);
+            if ($n > 0) {
+                $$r++;
+                $th = threads->new(\&broad2, $n-1);
+                cond_wait($r);
+                $$r += 10;
+            }
+            else {
+                ok(1, $$r == 3, "cond_broadcast: ref: all three waiting");
+                cond_broadcast($r);
+            }
+        }
+        $th->join if $th;
     }
 
     threads->new(\&broad2, 3)->join;;
     ok(2, $$r == 33, "cond_broadcast: ref: all three threads woken");
-    print "# counter=$$r\n";
 
     $Base += 2;
 
 }
 
-# test warnings;
 
+# test warnings;
 {
     my $warncount = 0;
     local $SIG{__WARN__} = sub { $warncount++ };
@@ -274,8 +280,7 @@ sub ok {
     cond_broadcast($lock);
     ok(4, $warncount == 2, 'get no warning on cond_broadcast');
 
-    $Base += 4;
+    #$Base += 4;
 }
 
-
-
+# EOF
diff --git a/ext/threads/shared/t/disabled.t b/ext/threads/shared/t/disabled.t
index f3e90a7849..8597f90cd9 100644
--- a/ext/threads/shared/t/disabled.t
+++ b/ext/threads/shared/t/disabled.t
@@ -1,24 +1,26 @@
-#!./perl -Tw
-
-# Tests of threads::shared's behavior when threads are disabled.
+use strict;
+use warnings;
 
 BEGIN {
-    chdir 't';
-    @INC = '../lib';
-    require Config;
-    if (($Config::Config{'extensions'} !~ m!\bthreads/shared\b!) ){
-        print "1..0 # Skip -- Perl configured without threads::shared module\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
-# Can't use Test::More, it turns threads on.
 use Test;
 plan tests => 31;
 
 use threads::shared;
 
-# Make sure threads are really off.
+### Start of Testing ###
+
+# Make sure threads are really off
 ok( !$INC{"threads.pm"} );
 
 # Check each faked function.
@@ -56,3 +58,5 @@ foreach my $func (qw(cond_wait cond_signal cond_broadcast)) {
     lock(@array);
     ok( "@array", "1 2 3 4" );
 }
+
+# EOF
diff --git a/ext/threads/shared/t/hv_refs.t b/ext/threads/shared/t/hv_refs.t
index ca9c73737d..938f7a7916 100644
--- a/ext/threads/shared/t/hv_refs.t
+++ b/ext/threads/shared/t/hv_refs.t
@@ -1,39 +1,45 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
-sub skip {
-    my ($id, $ok, $name) = @_;
-    print "ok $id # skip _thrcnt - $name \n";
-}
+BEGIN {
+    $| = 1;
+    print("1..20\n");   ### Number of tests that will be run ###
+};
 
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..17\n" };
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
+
 my $foo;
 share($foo);
 my %foo;
@@ -76,23 +82,32 @@ ok(10, keys %foo == 0, "And make sure we realy have deleted the values");
 }
 
 {
-  my $h = {a=>14};
-  my $r = \$h->{a};
-  share($r);
-  lock($r);
-  lock($h->{a});
-  ok(14, 1, "lock on helems now work, this was bug 10045");
-
+    my $h = {a=>14};
+    my $r = \$h->{a};
+    share($r);
+    if ($] > 5.008) {
+        eval { lock($r); };
+        ok(14, !$@, "lock on helems ref: $@");
+        eval { lock($h->{a}); };
+        ok(15, !$@, "lock on helems: $@");
+    } else {
+        ok(14, 1, "skipped.  < 5.8");
+        ok(15, 1, "skipped.  < 5.8");
+    }
 }
 {
     my $object : shared = &share({});
     threads->new(sub {
-		     bless $object, 'test1';
-		 })->join;
-    ok(15, ref($object) eq 'test1', "blessing does work");
+                     bless $object, 'test1';
+                 })->join;
+    ok(16, ref($object) eq 'test1', "blessing does work");
     my %test = (object => $object);
-    ok(16, ref($test{object}) eq 'test1', "and some more work");
+    ok(17, ref($test{object}) eq 'test1', "and some more work");
     bless $object, 'test2';
-    ok(17, ref($test{object}) eq 'test2', "reblessing works!");
+    ok(18, ref($test{object}) eq 'test2', "reblessing works!");
 }
 
+ok(19, is_shared($foo), "Check for sharing");
+ok(20, is_shared(%foo), "Check for sharing");
+
+# EOF
diff --git a/ext/threads/shared/t/hv_simple.t b/ext/threads/shared/t/hv_simple.t
index ac35489870..9ea9b9e620 100644
--- a/ext/threads/shared/t/hv_simple.t
+++ b/ext/threads/shared/t/hv_simple.t
@@ -1,41 +1,45 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
-
-    return $ok;
-}
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-sub skip {
-    my ($id, $ok, $name) = @_;
-    print "ok $id # skip _thrcnt - $name \n";
+    return ($ok);
 }
 
+BEGIN {
+    $| = 1;
+    print("1..16\n");   ### Number of tests that will be run ###
+};
 
-
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..15\n" };
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
+
 my %hash;
 share(%hash);
 $hash{"foo"} = "bar";
@@ -70,3 +74,7 @@ ok(14, exists $hash{1}, "Check numeric key");
 
 threads->create(sub { %hash = () })->join();
 ok(15, keys %hash == 0, "Check clear");
+
+ok(16, is_shared(%hash), "Check for sharing");
+
+# EOF
diff --git a/ext/threads/shared/t/no_share.t b/ext/threads/shared/t/no_share.t
index 7e5a80fb37..23a43fd3da 100644
--- a/ext/threads/shared/t/no_share.t
+++ b/ext/threads/shared/t/no_share.t
@@ -1,47 +1,64 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-       print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
-    $SIG{__WARN__} = sub { $warnmsg = shift; };
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
+BEGIN {
+    $| = 1;
+    print("1..6\n");   ### Number of tests that will be run ###
+};
+
 our $warnmsg;
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..5\n" };
+BEGIN {
+    $SIG{__WARN__} = sub { $warnmsg = shift; };
+}
+
 use threads::shared;
 use threads;
-ok(1,1,"loaded");
-ok(2,$warnmsg =~ /Warning, threads::shared has already been loaded/,
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
+
+ok(2, ($warnmsg =~ /Warning, threads::shared has already been loaded/)?1:0,
     "threads has warned us");
+
 my $test = "bar";
 share($test);
-ok(3,$test eq "bar","Test disabled share not interfering");
-threads->create(
-               sub {
-                   ok(4,$test eq "bar","Test disabled share after thread");
+ok(3, $test eq "bar", "Test disabled share not interfering");
+
+threads->create(sub {
+                   ok(4, $test eq "bar", "Test disabled share after thread");
                    $test = "baz";
-                   })->join();
+                })->join();
 # Value should either remain unchanged or be value set by other thread
-ok(5,$test eq "bar" || $test eq 'baz',"Test that value is an expected one");
+ok(5, $test eq "bar" || $test eq 'baz', "Test that value is an expected one");
 
+ok(6, ! is_shared($test), "Check for sharing");
 
+# EOF
diff --git a/ext/threads/shared/t/shared_attr.t b/ext/threads/shared/t/shared_attr.t
index 367424c1f2..a901b702b7 100644
--- a/ext/threads/shared/t/shared_attr.t
+++ b/ext/threads/shared/t/shared_attr.t
@@ -1,35 +1,47 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
+    if (! defined($name)) {
+        $name = '';
+    }
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
+BEGIN {
+    $| = 1;
+    print("1..101\n");   ### Number of tests that will be run ###
+};
 
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..81\n" };
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
 
 my $test_count;
 share($test_count);
@@ -48,8 +60,22 @@ for(1..10) {
     ok($test_count++, $foo{foo} eq "bar");
     threads->create(sub { $foo{bar} = "foo" })->join();
     ok($test_count++, $foo{bar} eq "foo");
-    
+
     threads->create(sub { $foo{array} = \@foo})->join();
     threads->create(sub { push @{$foo{array}}, "baz"})->join();
     ok($test_count++, $foo[-1] eq "baz");
 }
+
+my $shared :shared = &share({});
+$$shared{'foo'} = 'bar';
+
+for(1..10) {
+  my $str1 = "$shared";
+  my $str2 = "$shared";
+  ok($test_count++, $str1 eq $str2, 'stringify');
+  $str1 = $$shared{'foo'};
+  $str2 = $$shared{'foo'};
+  ok($test_count++, $str1 eq $str2, 'contents');
+}
+
+# EOF
diff --git a/ext/threads/shared/t/sv_refs.t b/ext/threads/shared/t/sv_refs.t
index fd37f0f23d..2d47002e3d 100644
--- a/ext/threads/shared/t/sv_refs.t
+++ b/ext/threads/shared/t/sv_refs.t
@@ -1,48 +1,51 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
     }
-    if ($Config{'extensions'} !~ /\bDevel\/Peek\b/) {
-	print "1..0 # Skip: Devel::Peek was not built\n";
-	exit 0;
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
-use Devel::Peek;
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..10\n" };
+BEGIN {
+    $| = 1;
+    print("1..11\n");   ### Number of tests that will be run ###
+};
+
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
 
 my $foo;
 my $bar = "foo";
 share($foo);
-eval {
-$foo = \$bar;
-};
-
+eval { $foo = \$bar; };
 ok(2,my $temp1 = $@ =~/^Invalid\b.*shared scalar/, "Wrong error message");
+
 share($bar);
 $foo = \$bar;
 ok(3, $temp1 = $foo =~/SCALAR/, "Check that is a ref");
@@ -68,3 +71,7 @@ $t2 = "text";
 $t1 = \$t2;
 threads->create(sub { $t1 = "bar" })->join();
 ok(10,$t1 eq 'bar',"Check that assign to a ROK works");
+
+ok(11, is_shared($foo), "Check for sharing");
+
+# EOF
diff --git a/ext/threads/shared/t/sv_simple.t b/ext/threads/shared/t/sv_simple.t
index 0abd2decaf..f532bc6033 100644
--- a/ext/threads/shared/t/sv_simple.t
+++ b/ext/threads/shared/t/sv_simple.t
@@ -1,35 +1,45 @@
+use strict;
 use warnings;
 
 BEGIN {
-#    chdir 't' if -d 't';
-#    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no useithreads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
 
+use ExtUtils::testlib;
 
 sub ok {
     my ($id, $ok, $name) = @_;
 
-    $name = '' unless defined $name;
     # You have to do it this way or VMS will get confused.
-    print $ok ? "ok $id - $name\n" : "not ok $id - $name\n";
-
-    printf "# Failed test at line %d\n", (caller)[2] unless $ok;
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
 
-    return $ok;
+    return ($ok);
 }
 
+BEGIN {
+    $| = 1;
+    print("1..11\n");   ### Number of tests that will be run ###
+};
 
-use ExtUtils::testlib;
-use strict;
-BEGIN { print "1..10\n" };
 use threads;
 use threads::shared;
-ok(1,1,"loaded");
+ok(1, 1, 'Loaded');
+
+### Start of Testing ###
+
 my $test = "bar";
 share($test);
 ok(2,$test eq "bar","Test magic share fetch");
@@ -37,11 +47,11 @@ $test = "foo";
 ok(3,$test eq "foo","Test magic share assign");
 my $c = threads::shared::_refcnt($test);
 threads->create(
-		sub {
-		    ok(4, $test eq "foo","Test magic share fetch after thread");
-		    $test = "baz";
+                sub {
+                    ok(4, $test eq "foo","Test magic share fetch after thread");
+                    $test = "baz";
                     ok(5,threads::shared::_refcnt($test) > $c, "Check that threadcount is correct");
-		    })->join();
+                    })->join();
 ok(6,$test eq "baz","Test that value has changed in another thread");
 ok(7,threads::shared::_refcnt($test) == $c,"Check thrcnt is down properly");
 $test = "barbar";
@@ -51,9 +61,6 @@ ok(9, length($test) == 9, "Check length code after different thread modified it"
 threads->create(sub { undef($test)})->join();
 ok(10, !defined($test), "Check undef value");
 
+ok(11, is_shared($test), "Check for sharing");
 
-
-
-
-
-
+# EOF
diff --git a/ext/threads/shared/t/wait.t b/ext/threads/shared/t/wait.t
index 451af2a789..b0c7d9ebb5 100644
--- a/ext/threads/shared/t/wait.t
+++ b/ext/threads/shared/t/wait.t
@@ -1,39 +1,55 @@
-# cond_wait and cond_timedwait extended tests
-# adapted from cond.t
-
+use strict;
 use warnings;
 
 BEGIN {
-    chdir 't' if -d 't';
-    push @INC ,'../lib';
-    require Config; import Config;
-    unless ($Config{'useithreads'}) {
-        print "1..0 # Skip: no threads\n";
-        exit 0;
+    if ($ENV{'PERL_CORE'}){
+        chdir 't';
+        unshift @INC, '../lib';
+    }
+    use Config;
+    if (! $Config{'useithreads'}) {
+        print("1..0 # Skip: Perl not compiled with 'useithreads'\n");
+        exit(0);
     }
 }
-$|++;
-print "1..102\n";
-use strict;
 
-use threads;
-use threads::shared;
 use ExtUtils::testlib;
 
 my $Base = 0;
-
 sub ok {
-    my ($offset, $bool, $text) = @_;
-    my $not = '';
-    $not = "not " unless $bool;
-    print "${not}ok " . ($Base + $offset) . " - $text\n";
+    my ($id, $ok, $name) = @_;
+    $id += $Base;
+
+    # You have to do it this way or VMS will get confused.
+    if ($ok) {
+        print("ok $id - $name\n");
+    } else {
+        print("not ok $id - $name\n");
+        printf("# Failed test at line %d\n", (caller)[2]);
+    }
+
+    return ($ok);
 }
 
+BEGIN {
+    $| = 1;
+    print("1..103\n");   ### Number of tests that will be run ###
+};
+
+use threads;
+use threads::shared;
+ok(1, 1, 'Loaded');
+$Base++;
+
+### Start of Testing ###
+
+# cond_wait and cond_timedwait extended tests adapted from cond.t
+
 # The two skips later on in these tests refer to this quote from the
 # pod/perl583delta.pod:
 #
 # =head1 Platform Specific Problems
-# 
+#
 # The regression test ext/threads/shared/t/wait.t fails on early RedHat 9
 # and HP-UX 10.20 due to bugs in their threading implementations.
 # RedHat users should see https://rhn.redhat.com/errata/RHBA-2003-136.html
@@ -103,7 +119,6 @@ SYNC_SHARED: {
   my $cond : shared;
   my $lock : shared;
 
-  print "# testing my \$var : shared\n";
   ok(1, 1, "Shared synchronization tests preparation");
   $Base += 1;
 
@@ -204,21 +219,19 @@ SYNC_SHARED: {
   # cond_timedwait timeout (relative timeout)
   sub ctw_fail {
     my $to = shift;
-
     if ($^O eq "hpux" && $Config{osvers} <= 10.20) {
       # The lock obtaining would pass, but the wait will not.
       ok(1,1, "$test: obtained initial lock");
       ok(2,0, "# SKIP see perl583delta");
-    }
-    else {
+    } else {
       $test =~ /twain/ ? lock($lock) : lock($cond);
       ok(1,1, "$test: obtained initial lock");
       my $ok;
       for ($test) {
-	$ok=cond_timedwait($cond, time() + $to), last        if    /simple/;
-	$ok=cond_timedwait($cond, time() + $to, $cond), last if    /repeat/;
-	$ok=cond_timedwait($cond, time() + $to, $lock), last if    /twain/;
-	die "$test: unknown test\n"; 
+        $ok=cond_timedwait($cond, time() + $to), last        if    /simple/;
+        $ok=cond_timedwait($cond, time() + $to, $cond), last if    /repeat/;
+        $ok=cond_timedwait($cond, time() + $to, $lock), last if    /twain/;
+        die "$test: unknown test\n"; 
       }
       ok(2,!defined($ok), "$test: timeout");
     }
@@ -238,7 +251,6 @@ SYNCH_REFS: {
   my $cond = \$true_cond;
   my $lock = \$true_lock;
 
-  print "# testing reference to shared(\$var)\n";
   ok(1, 1, "Synchronization reference tests preparation");
   $Base += 1;
 
@@ -343,16 +355,15 @@ SYNCH_REFS: {
       # The lock obtaining would pass, but the wait will not.
       ok(1,1, "$test: obtained initial lock");
       ok(2,0, "# SKIP see perl583delta");
-      }
-    else {
+    } else {
       $test =~ /twain/ ? lock($lock) : lock($cond);
       ok(1,1, "$test: obtained initial lock");
       my $ok;
       for ($test) {
-	$ok=cond_timedwait($cond, time() + $to), last        if    /simple/;
-	$ok=cond_timedwait($cond, time() + $to, $cond), last if    /repeat/;
-	$ok=cond_timedwait($cond, time() + $to, $lock), last if    /twain/;
-	die "$test: unknown test\n"; 
+        $ok=cond_timedwait($cond, time() + $to), last        if    /simple/;
+        $ok=cond_timedwait($cond, time() + $to, $cond), last if    /repeat/;
+        $ok=cond_timedwait($cond, time() + $to, $lock), last if    /twain/;
+        die "$test: unknown test\n"; 
       }
       ok(2,!$ok, "$test: timeout");
     }
@@ -360,3 +371,4 @@ SYNCH_REFS: {
 
 } # -- SYNCH_REFS block
 
+# EOF
diff --git a/mkppport.lst b/mkppport.lst
index 548ae2b539..b13d7088b5 100644
--- a/mkppport.lst
+++ b/mkppport.lst
@@ -10,6 +10,7 @@ ext/Cwd
 ext/Data/Dumper
 ext/Digest/SHA
 ext/Sys/Syslog
+ext/threads/shared
 ext/Time/HiRes
 
 win32/ext/Win32API/File