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[Perl/perl5] 99f701: XXX craig Unixish.h, doshish.h: Reorderterminatio...

From:
Karl Williamson via perl5-changes
Date:
March 23, 2021 10:53
Subject:
[Perl/perl5] 99f701: XXX craig Unixish.h, doshish.h: Reorderterminatio...
Message ID:
Perl/perl5/push/refs/heads/smoke-me/khw-locale/000000-2ebd3e@github.com
  Branch: refs/heads/smoke-me/khw-locale
  Home:   https://github.com/Perl/perl5
  Commit: 99f701e5efe38c91e62c95a7bd1a5448b41ed187
      https://github.com/Perl/perl5/commit/99f701e5efe38c91e62c95a7bd1a5448b41ed187
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M dosish.h
    M unixish.h

  Log Message:
  -----------
  XXX craig Unixish.h, doshish.h: Reorder terminations; simplify

The IO and memory terminations need to be after other things.  Add a
comment so that future maintainers won't make the mistakes I did.

Also refactor to that amiga os doesn't have a separate list to get out
of sync

I suspect that the amiga termination should be moved to earlier in
the sequence, but absent any evidence; I'm leaving it unchanged.


  Commit: d43724eda55bc4b2250ba98b3cdfc8273850c26f
      https://github.com/Perl/perl5/commit/d43724eda55bc4b2250ba98b3cdfc8273850c26f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Win32: Don't check folds validity

This code will check, when warnings are on, that the libc functions
return valid values.  But Windows platforms will always fail because
they have multiple divergences from the Posix standard.  The macros that
implement the case changing/folding in handy.h take extra steps to bring
Windows code more into alignment with Posix.  Those are too complicated
to easily duplicate the logic here.  The result of these checks is
looked at by our test suite, which has long, without anyone noticing,
skipped portions on Windows, even though handy.h should correct for
this.  So simply, don't do the checking under Windows, and find out what
handy.h has failed to fully correct for.


  Commit: 798747fc48b365e110e8b1cd70b5bab13b5c05e2
      https://github.com/Perl/perl5/commit/798747fc48b365e110e8b1cd70b5bab13b5c05e2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M lib/locale_threads.t

  Log Message:
  -----------
  XXX locale_threads


  Commit: e2ffb1b91ff706f4c8b10a58639b9e0f849b8749
      https://github.com/Perl/perl5/commit/e2ffb1b91ff706f4c8b10a58639b9e0f849b8749
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  DEBUG_L now also looks at environment variable

Because locale initialization happens before command line processing,
one can't pass a -DL argument to enable debugging of locale
initialization.  Instead, an environment variable is read then, and is
used to enable debugging or not.  In the past, code specifically had to
test for this being set.  This commit changes that so that debugging can
automatically be enabled without having to write special code.  Future
commits will strip out those special checks.


  Commit: 64c69e63250b240ba23b0e7702ce9c2dccc9c694
      https://github.com/Perl/perl5/commit/64c69e63250b240ba23b0e7702ce9c2dccc9c694
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Replace most #ifdef DEBUGGING lines

THe previous commit enhanced the DEBUG macros so that they contain the
logic that previously had to be done with conditional compilation
statements.  Removing them makes the code easier to read.


  Commit: 7ae0e6420d3a76641dc260968bf1881a36d48c47
      https://github.com/Perl/perl5/commit/7ae0e6420d3a76641dc260968bf1881a36d48c47
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h
    M numeric.c
    M regcomp.c
    M regexec.c
    M utfebcdic.h

  Log Message:
  -----------
  Change handy.h macro names to be C standard conformant

C reserves symbols beginning with underscores for its own use.  This
commit moves the underscore so it is trailing, which is legal.  The
symbols changed here are most of the ones in handy.h that have few uses
outside it.


  Commit: e59df55efa87d2eed2c18e20424007d1ca4ff8e5
      https://github.com/Perl/perl5/commit/e59df55efa87d2eed2c18e20424007d1ca4ff8e5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Remove only 2 calls to an internal macro

Replace isIDFIRST_LC and isWORD_CHAR_LC isIDFIRST_LC  with slightly
faster implementations.


  Commit: 090df88657a90dd2df24e5e3a9c7acd82726bb1c
      https://github.com/Perl/perl5/commit/090df88657a90dd2df24e5e3a9c7acd82726bb1c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Refactor some #ifdef's for commonality

This changes these compilation conditionals so that things in common
between Windows and other platforms are only defined once.

It changes the isIDFIRST_LC and isWORDCHAR_LC definitions for
non-Windows to match that platform superficially, though expanding to
what it previously did to.


  Commit: 12ca2d9c33af6d5ef5cb5bce52d75e493c85695b
      https://github.com/Perl/perl5/commit/12ca2d9c33af6d5ef5cb5bce52d75e493c85695b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add some branch predictions


  Commit: 5ef5d53d6d544ce4787870c9e7cdb5712fdd1db3
      https://github.com/Perl/perl5/commit/5ef5d53d6d544ce4787870c9e7cdb5712fdd1db3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: White-space, comment only


  Commit: f4eb222f65203b4f89a0034f03f54bbb64ca126f
      https://github.com/Perl/perl5/commit/f4eb222f65203b4f89a0034f03f54bbb64ca126f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M charclass_invlists.h
    M handy.h
    M l1_char_class_tab.h
    M lib/unicore/uni_keywords.pl
    M perl.c
    M perl.h
    M regcomp.c
    M regcomp.h
    M regen/mk_PL_charclass.pl
    M regexec.c
    M sv.c
    M uni_keywords.h
    M utfebcdic.h

  Log Message:
  -----------
  Change handy.h macro names to be C standard conformant

C reserves symbols beginning with underscores for its own use.  This
commit moves the underscore so it is trailing, which is legal.  The
symbols changed here are many of the ones in handy.h that have
significant uses outside it.


  Commit: f113126fd824a8eb4516af0ff16631b19f1e894c
      https://github.com/Perl/perl5/commit/f113126fd824a8eb4516af0ff16631b19f1e894c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Rmv internal macro

LC_CAST_ was my attempt at generality, but I didn't realize that the
POSIX standard specifies the type that this was meant to generalize, so
there isn't any need for it.


  Commit: 17dfb2815a668b71356c8ed0f126b594c5b48725
      https://github.com/Perl/perl5/commit/17dfb2815a668b71356c8ed0f126b594c5b48725
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Refactor some internal macros

This changes the parameters etc, in preparation for further changes


  Commit: 5086155b288731e737dced4dab6f89f1b66111d4
      https://github.com/Perl/perl5/commit/5086155b288731e737dced4dab6f89f1b66111d4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Rmv unnecessary parameter to internal macros

The cast is required to be U8 by the POSIX standard.  There is no need
to have this added generality.


  Commit: 6c716c7c57d2a3c1c16c01ff342ca47ffb63717a
      https://github.com/Perl/perl5/commit/6c716c7c57d2a3c1c16c01ff342ca47ffb63717a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: #define one macro in terms of another

These two macros are equivalent as folding and lowercasing are the same
for this input domain.  Better to say so rather than to replicate the
definitions.


  Commit: 0d74eced07b69c73943a037098f84450e8e500f2
      https://github.com/Perl/perl5/commit/0d74eced07b69c73943a037098f84450e8e500f2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add wrapper layer macros for isalnum() ...

This adds a new set of macros, forming a lower layer to what is currently
there to wrap the character classification libc functions, isdigit()
etc, and case changing ones, tolower(), toupper().

On most platforms these expand simply to the libc function call.  But on
windows, they expand to something more complex, to bring the Windows
calls into POSIX compliance.  Previously that was achieved at the higher
level, with the result that lower level calls were broken.  This
resulted in parts of the test suite being skipped on Windows.

The current level is rewritten to use the new lower layer, with the
result that it is simpler, as the complexity is now done further down.

I thought about calling these macros is_porcelain_isalnum or something
similar to emphaisze that they are close to the bare libc version, but
thought isU8_alnum() is shorter and conveys another truth, that being
the input is assumed to be a byte, without checking.


  Commit: 4c225fb56549d965ab9fd6fac72905e6941d94f3
      https://github.com/Perl/perl5/commit/4c225fb56549d965ab9fd6fac72905e6941d94f3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M vms/vms.c

  Log Message:
  -----------
  locale.c: Use new macros from the prev commit

This should result in Windows boxes now passing the locale sanity
checks.  Previously that failure would cause the test suite tests to be
skipped, and warnings generated to Windows users that actually were
invalid, as the flaws were actually compensated for in other code.


  Commit: 8e52161e59045efaf34190adf107d0bf9edb0b2d
      https://github.com/Perl/perl5/commit/8e52161e59045efaf34190adf107d0bf9edb0b2d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  XXX SEE IF WORKS handy.h: Change Windows macros


  Commit: b9bf15d89a36ab54ec16af26874ff7bd51734a3b
      https://github.com/Perl/perl5/commit/b9bf15d89a36ab54ec16af26874ff7bd51734a3b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M handy.h

  Log Message:
  -----------
  handy.h: Add isCASED_LC

As a convenience to other code.


  Commit: 270a8573dbe5dae5443c43ab5fbc5fa491b62797
      https://github.com/Perl/perl5/commit/270a8573dbe5dae5443c43ab5fbc5fa491b62797
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Improve code

These case statements in a switch all had the same prelude for checking
if the locale is UTF-8 and handling that case separately.  A few commits
ago created macros closer to the base level.  This commit factors out
the common UTF-8 handling, and then puts the lower lever things in the
switch().  Perhaps the C optimizer will be smart enough to do this too,
but we might as well do it ourselves, now that it is convenient.


  Commit: 1a668f60654314f9f05fe386b592d5395f59b865
      https://github.com/Perl/perl5/commit/1a668f60654314f9f05fe386b592d5395f59b865
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M regexec.c

  Log Message:
  -----------
  regexec.c: Refactor switch default()

It seems clearer to me to have the panic at the end of the routine
instead of as the default: of a switch().


  Commit: 798e0210e776a98a8fae17eb3faadf35b4f375b0
      https://github.com/Perl/perl5/commit/798e0210e776a98a8fae17eb3faadf35b4f375b0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Declare three static arrays to be so.


  Commit: a227beebf339ebff8c449ee061f8aebdd40e65f6
      https://github.com/Perl/perl5/commit/a227beebf339ebff8c449ee061f8aebdd40e65f6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Move some locale.c #defines to perl.h

This is in preparation for them to be used in macros from outside
locale.c


  Commit: 731ee1b706bb1a766236acded2de9cb2701e205a
      https://github.com/Perl/perl5/commit/731ee1b706bb1a766236acded2de9cb2701e205a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Mark newly moved symbols as private

The previous commit made certain symbols that previously were local to
locale.c now available everywhere.  Add a trailing underscore to their
names to mark them as private.


  Commit: cf9ab229260f3c6043d57f2acd44d658746e2ac3
      https://github.com/Perl/perl5/commit/cf9ab229260f3c6043d57f2acd44d658746e2ac3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M makedef.pl
    M perl.h

  Log Message:
  -----------
  Add USE_LOCALE_THREADS #define

This is in preparation for supporting configurations where there threads
are available, but the locale handling code should ignore that fact.

This stems from the unusual locale handling of z/OS, where any attempt
is ignored to change locales after the first thread is created.


  Commit: 8ea10fd40947f5046ce155c5443e56041c65dcee
      https://github.com/Perl/perl5/commit/8ea10fd40947f5046ce155c5443e56041c65dcee
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs
    M ext/POSIX/lib/POSIX.pm
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M perl.h
    M sv.c

  Log Message:
  -----------
  Regularize HAS_POSIX_2008_LOCALE, USE_POSIX_2008_LOCALE

A platform shouldn't be required to use the Posix 2008 locale handling
functions if they are present.  Perhaps they are buggy.  So, a separate
define for using them was introduced, USE_POSIX_2008_LOCALE.  But until
this commit there were cases that were looking at the underlying
availability of the functions, not if the Configuration called for their
use.


  Commit: 9113c3c516040eddb13a35790258e051fddf44a1
      https://github.com/Perl/perl5/commit/9113c3c516040eddb13a35790258e051fddf44a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Change macro name

Adopt the git convention of 'porcelain' meaning without special
handling.  This makes it clear that porcelain_setlocale() is the base
level.


  Commit: c2db71a5be0ecf89889e4536eae3fdf4e58f883e
      https://github.com/Perl/perl5/commit/c2db71a5be0ecf89889e4536eae3fdf4e58f883e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Cast return of setlocale() to const

If they had it to do over again, the libc makers would have made the
return of this function 'const char *'.  We can cast it that way
internally to catch erroneous uses at compile time.


  Commit: 9e07e3386bab77dca31aa18fc2e5b8789b22f4c8
      https://github.com/Perl/perl5/commit/9e07e3386bab77dca31aa18fc2e5b8789b22f4c8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Create S_get_category_index()

libc locale categories, like LC_NUMERIC, are opaque integers.  This
makes it inconvenient to have table-driven code.  Instead, we have
tables that are indexed by small positive integers, which are a
compile-time mapping from the libc values.

This commit creates a run-time function to also do that mapping.  It
will first be used in the next commit.

The function does a loop through the available categories, looking for a
match.  It could be replaced by some sort of quick hash lookup, but the
largest arrays in the field have a max of 12 elements, with almost all
searches finding their quarry in the first 6.  It doesn't seem
worthwhile to me to replace a linear search of 6 elements by something
more complicated.  The design intent is this search will be used only at
the edges of the locale-handling code; once found the index is used in
future bits of the current operation.


  Commit: 0066d077de259ffae45b316a0e6907c969371252
      https://github.com/Perl/perl5/commit/0066d077de259ffae45b316a0e6907c969371252
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Use get_category_index()

This creates the first uses of the function added in the previous commit.

It changes the name of a function that now takes an index to have the
suffix _i to indicate its calling parameter is a category index rather
than a category.  This will become a common paradigm in this file in
later commits.

Two macros are also created to call that function; they have suffixes _c
(to indicate the parameter is a category known at compile time, and _r
(to indicate it needs to be computed at runtime).  This is in keeping
with the already existing paradigm in this file.


  Commit: a5cd97d78bf7d0e3d6e87dcdafbd284593c6bb1b
      https://github.com/Perl/perl5/commit/a5cd97d78bf7d0e3d6e87dcdafbd284593c6bb1b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Change S_emulate_setlocale name and sig

It turns out this function is called only from places where we have the
category index already computed; so change the signature to use the
index and remove the re-calculation.

It renames it to emulate_setlocale_i() to indicate that the category
parameter is an index.

This also means, that it's very unlikely that it will be called with an
out-of-bounds value.  Remove the debugging statement for that case (but
retain the error return value).


  Commit: a2f6c58952f40039cd866f31688ab24172db4df9
      https://github.com/Perl/perl5/commit/a2f6c58952f40039cd866f31688ab24172db4df9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M pod/perldelta.pod
    M pod/perldiag.pod

  Log Message:
  -----------
  locale.c: Simplify S_category_name

We can use the new function S_get_category_index() to simplify this.
Also, when I wrote it I didn't know about Perl_form(), and had
reimplemented a portion of it here; which is yanked as well.


  Commit: 9faba73013c8ce003770bc61852b2f65806ad095
      https://github.com/Perl/perl5/commit/9faba73013c8ce003770bc61852b2f65806ad095
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move unreachable code

It turns out this code, setting errno, is unreachable.  Move it to the
place where it would do some good, removing an extraneous, unreachable
return;


  Commit: 590ec4fc282d831a6aaf770ed95119a0b68779a5
      https://github.com/Perl/perl5/commit/590ec4fc282d831a6aaf770ed95119a0b68779a5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Comment clarifications, white space

Some of these are to make future difference listings shorter

Some of the changes look like incorrect indentation here, but anticipate
future commits.


  Commit: 3a3054650a4ba0a3ea6c1c87494c5c3de2da11d6
      https://github.com/Perl/perl5/commit/3a3054650a4ba0a3ea6c1c87494c5c3de2da11d6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Separate query part of emulate_setlocale()

This splits a large function so that it is easier to comprehend, and is
in preparation for them to be separately callable.


  Commit: 8eb816582f813384225d98dca91568c0d837666b
      https://github.com/Perl/perl5/commit/8eb816582f813384225d98dca91568c0d837666b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Outdent previous commit

The previous commit kept the indentation level the same as it moved code
to a new function, even though an outer block was stripped off in the
process.  This was to minimize diff output.  This commit is white space
only.


  Commit: 56fc10f91215112e909536a584ad65f86710d3c1
      https://github.com/Perl/perl5/commit/56fc10f91215112e909536a584ad65f86710d3c1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Remove spaces around a '##' preprocessor directive

It turns out that at least my gcc preprocessor gets confused in some
contexts if spaces surround the ##.  CAT2() doesn't work for these.

It is working in this context, but future commits will introduce ones
where it won't, so this commit will help make things consistent within
this file

What seems to fail is #define f(x) (..., g(x ## y), ...) where 'x' is a
an already #defined symbol.  I want 'xy', but instead, for example if
'x' has been defined to be 1, I get '1y'


  Commit: 41a5799e1f720bfeb9b060883dc589859bc3e510
      https://github.com/Perl/perl5/commit/41a5799e1f720bfeb9b060883dc589859bc3e510
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: #define some macros in terms of a base one

This is so changes to the lowest level automatically propagate to the
others


  Commit: 657a6a59a5d6215519319293138f7e437f3bb59c
      https://github.com/Perl/perl5/commit/657a6a59a5d6215519319293138f7e437f3bb59c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Create new macros for just querying locale

There are two sets of names, which immediately indicate if the result
can be relied on to be thread level or must be assumed to be global to
the whole process.  At the moment they all expand to the same thing,
since on a threadless perl, it's a don't care; and on a threaded perl,
they are all already thread-level, in the Configurations we support.

Future commits will cause the macros to diverge, and comments will be
added then.

For POSIX 2008, this commit causes queries to go directly to the query
function, avoiding S_emulate_setlocale_i() completely.


  Commit: 92de27a0cc73d621904f5abed5b21f5da65fdb7a
      https://github.com/Perl/perl5/commit/92de27a0cc73d621904f5abed5b21f5da65fdb7a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Generalize certain Win32 calls

The old versions were windows-specific; the changes use a more generic
macro that currently expands to the same thing, but future commits will
change that.


  Commit: 230430f548b77576ce0d438a4bfac2ff46375c2e
      https://github.com/Perl/perl5/commit/230430f548b77576ce0d438a4bfac2ff46375c2e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add a convenience #define

This makes it clear if we are using an array that currently only happens
on non-querylocale systems, but that will change in future commits.


  Commit: 8e017a1f605ff280ff5402e58ac2ec3f16eaa910
      https://github.com/Perl/perl5/commit/8e017a1f605ff280ff5402e58ac2ec3f16eaa910
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add setlocale() return context macros

Future commits will benefit from knowing if the return value of
setlocale is to be ignored, just checked for if it worked, or the full
value is needed and can be relied on (or not) to be per-thread.


  Commit: 9199a729f751b10375e9bbbc16e50c2dddb60996
      https://github.com/Perl/perl5/commit/9199a729f751b10375e9bbbc16e50c2dddb60996
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add panic check/message

This panic is done when a setlocale unexpectedly fails.


  Commit: fb0a2e92dbc5bb53763bf8c5198fe6d2f4c418a7
      https://github.com/Perl/perl5/commit/fb0a2e92dbc5bb53763bf8c5198fe6d2f4c418a7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Use a function table to simplify code

Some locale categories require extra steps when they are changed.  This
moves that logic to a table, which gets rid of some code


  Commit: 20ecae05fae338c5745b241cd5165fd22cda1735
      https://github.com/Perl/perl5/commit/20ecae05fae338c5745b241cd5165fd22cda1735
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Perl_setlocale(): Same code for all param2 == NULL

Calling Perl_setlocale() with a NULL 2nd parameter returns the current
locale, rather than changing it.  Previously LC_NUMERIC and LC_ALL were
treated specially; other categories were lumped in with the code that
changes the locale.

Changing some categories involves a non-trivial amount of work.  This
commit avoids that by moving all queries to the same 'if' branch.
LC_NUMERIC and LC_ALL still have to be treated specially, but now it's
all within the same outer 'if', and the unnecessarily executing code
for when the locale changes is avoided.


  Commit: c5616d7fda40ef10c2232fa3d0db11ffa4b3c456
      https://github.com/Perl/perl5/commit/c5616d7fda40ef10c2232fa3d0db11ffa4b3c456
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use low level macros at low level

Implementing Perl_setlocale, we can safely use the internal macros that
the public ones expand to call, without the overhead those public macros
impose (which they do to be more immune from improper calls from outside
code).


  Commit: 4e887e25ff4edb5d1ee4b48ff3af51652c3b906c
      https://github.com/Perl/perl5/commit/4e887e25ff4edb5d1ee4b48ff3af51652c3b906c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Remove exploratory code

This code was to find out, in debugging builds, if an undocumented glibc
feature worked.  There were no reports that it didn't, and so, after,
several releases, it has served its purpose.  A future commit will allow
enabling this feature as a Configuration option.


  Commit: c8b7a6b9daee791d945471448787d01e0446b23b
      https://github.com/Perl/perl5/commit/c8b7a6b9daee791d945471448787d01e0446b23b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Expand scope of cpp conditional

This just doesn't bother with checking some locale-related stuff if not
paying attention to locales.


  Commit: 021b90b4ba4b2bd417b4e357167f7b6ccdb7c073
      https://github.com/Perl/perl5/commit/021b90b4ba4b2bd417b4e357167f7b6ccdb7c073
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  locale.c: Create new convenience macro

glibc doesn't have the querylocale() function, available on some other
platforms, such as Darwin and *BSD.  However, it instead has the
equivalent functionality available through an undocumented feature.

This commit allows someone in the know to compile perl to use that
feature, and wraps its API with a macro so that the calling code doesn't
have to be aware of the different APIs of the two methods.

That macro's definition is now done in perl.h, as future commits will
use it in other files.

Since this is an undocumented feature, I am not currently documenting
this wrapper availability.  However, it has been used in the field
without complaint for a couple of releases, as follows:  A more
cumbersome substitute method continues to be used to get what it does.
But in the past both methods were tried and the program died if they
yielded different results.  Since no one has complained, I'm fairly
confident it works.  But sill I'm deferring its more general use.


  Commit: 9269f5bad69eab2a9e11ffa9684f998c9e332de7
      https://github.com/Perl/perl5/commit/9269f5bad69eab2a9e11ffa9684f998c9e332de7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M intrpvar.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: querylocale() doesn't work on LC_ALL

I had misread the man pages.  This bug has been in the field for several
releases now, but most likely hasn't shown up because it's almost always
the case that the locale categories will be set to the same locale.  And
so most implementations of querylocale() would return the correct
result.

This commit works by splitting the calculation of the value of LC_ALL
from S_emulate_setlocale_i() into a separate function, and extending it
to work on querylocale() systems.  This has the added benefit of
removing tangential code from the main line, making
S_emulate_setlocale_i easier to read.

calculate_LC_ALL() is the new function, and is now called from two
places.  As part of this commit, constness is added to PL_curlocales[]

Part of this change is to keep our records of LC_ALL on non-querylocale
systems always up-to-date, which is better practice

And part of this change is temporary, marked as such, to be removed a
few commits later.


  Commit: 632bf5777f75bc7e1117bc8c648e3e9bb7a6c780
      https://github.com/Perl/perl5/commit/632bf5777f75bc7e1117bc8c648e3e9bb7a6c780
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use setlocale() for init, not P2008

We have found bugs in the POSIX 2008 libc implementations on various
platforms.  This code, which does the initialization of locale handling
has always been very conservative, expecting possible failures due to
bugs in it our the libc implementations, and backing out if necessary to
a crippled, but workable state, if something goes wrong.

I think we should use the oldest, most stable locale implementation in
these circumstances


  Commit: 935b70128f497ae64c7f7c3180d8fdc48eeb46b0
      https://github.com/Perl/perl5/commit/935b70128f497ae64c7f7c3180d8fdc48eeb46b0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Split aggregate LC_ALL from emulate_setlocale

This splits into a separate function the code necessary in some
Configurations to calculate LC_ALL from a potentially disparate
aggregate of categories having different locales.

This is being done just for readability, as this extensive code in the
middle of something else distracts from the main point.

A goto is hence replaced by a recursive call.


  Commit: 5d4c3d6077192b8846fbec5934b7fcdfb07ee7c2
      https://github.com/Perl/perl5/commit/5d4c3d6077192b8846fbec5934b7fcdfb07ee7c2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Change internal variable name

The new name better reflects its purpose, so is less confusing


  Commit: 9689dfa92a40a64d6d5186ad24c67691986d75dd
      https://github.com/Perl/perl5/commit/9689dfa92a40a64d6d5186ad24c67691986d75dd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Clean up handling of a glibc bug

This commit moves all mention of this bug to just the code that requires
it, and inlines a macro, making it easier to comprehend


  Commit: 01afca677bd4e1390f4fc259a9293916e170af06
      https://github.com/Perl/perl5/commit/01afca677bd4e1390f4fc259a9293916e170af06
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Split ancillary from S_emulate_setlocale

This takes the code to update LC_ALL, used only in some Configurations,
out of the main line, making the main line more readable.

It also allows the removal of temporary code added a few commits back


  Commit: ad57289e5d569a7690439017784b098657df8bac
      https://github.com/Perl/perl5/commit/ad57289e5d569a7690439017784b098657df8bac
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: locale "" can be disparate

Setting a locale "" means to get the value from environment variables.
These can set locale categories to different locales, and this needs to
be handled.  The logic before this commit only handled the disparate
case when the locale wasn't ""; but this was compensated for elsewhere.
A future commit will remove that compensation.


  Commit: c12ec9051c9adf11862054fb73570e9eadf3408d
      https://github.com/Perl/perl5/commit/c12ec9051c9adf11862054fb73570e9eadf3408d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  Split off setting locale to "" from S_emulate_setlocale

This is done for readability, to move the special casing of setting a
locale to the empty string (hence getting it from the environment) out
of the main line code.


  Commit: f873b3f7f428c9ec75076694f1f201ffcbb3940f
      https://github.com/Perl/perl5/commit/f873b3f7f428c9ec75076694f1f201ffcbb3940f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M sv.c

  Log Message:
  -----------
  sv.c: Duplicate more variables during cloning

These locale-related ones should be getting initialized in the new
thread, but be certain.


  Commit: 92e9bb5fd74ba533e9d29afc2329c424d91ca8eb
      https://github.com/Perl/perl5/commit/92e9bb5fd74ba533e9d29afc2329c424d91ca8eb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M proto.h
    M sv.c

  Log Message:
  -----------
  locale.c: Add fcn to hide edge case undefined behavior

The POSIX 2008 API has an edge case in that the result of most of the
functions when called with a global (as opposed to a per-thread) locale
is undefined.

The duplocale() function is the exception which will create a per-thread
locale containing the values copied from the global one.

This commit just calls duplocale, if needed, and the caller need not
concern itself with this possibility


  Commit: fecbd11e8ce1c081ad28fdc136787fd45eb6724e
      https://github.com/Perl/perl5/commit/fecbd11e8ce1c081ad28fdc136787fd45eb6724e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add DEBUGGING information

These functions are called as expansions of macros.  It may be useful to
know where in the file the macro occurred.


  Commit: 0defcdce60df3e72a64e87277358e65134411941
      https://github.com/Perl/perl5/commit/0defcdce60df3e72a64e87277358e65134411941
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Separate out two Win fcns from a larger one

This makes the larger one easier to understand, and prepares for
possible independent calls to the two, which are potentially useful on
their own.


  Commit: 35110b61964b85041e34852ab928741b76bdab7f
      https://github.com/Perl/perl5/commit/35110b61964b85041e34852ab928741b76bdab7f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

  Log Message:
  -----------
  POSIX.xs: Use macro to reduce complexity

This #defines a macro and uses it to populate a structure, so that
strings don't have to be typed twice.


  Commit: ce5576493814344c0ca4b2ae1055f79317d94f4e
      https://github.com/Perl/perl5/commit/ce5576493814344c0ca4b2ae1055f79317d94f4e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

  Log Message:
  -----------
  POSIX.xs: White-space only

Properly indent some nested preprocessor directives


  Commit: 4b68dc7a75b47b3350a2b49b4bf18005b3cd8b86
      https://github.com/Perl/perl5/commit/4b68dc7a75b47b3350a2b49b4bf18005b3cd8b86
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M ext/POSIX/POSIX.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  Move code from POSIX.xs to locale.c

This avoids duplicated logic.


  Commit: afc3d028be5340d97d3eaf9ad66f0ca47ff09be3
      https://github.com/Perl/perl5/commit/afc3d028be5340d97d3eaf9ad66f0ca47ff09be3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Reorder cases in a switch

This moves handling the CODESET to the end, as future commits will make
its handling more complicated.  The cases are now ordered so the
simplest (based on the direction of future commits) are first


  Commit: 511f86adb4b39cacdfdf6cb4dc5e8f9d81f3cbb4
      https://github.com/Perl/perl5/commit/511f86adb4b39cacdfdf6cb4dc5e8f9d81f3cbb4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Make statics of repeated string constants

These strings are (or soon will be) used in multiple places; so have
just one definition for them.


  Commit: f7e1566c45675062c7ef70927c751277fcf5f8c1
      https://github.com/Perl/perl5/commit/f7e1566c45675062c7ef70927c751277fcf5f8c1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add two #defines

This makes sure that we handle having any variant of nl_langinfo() or
localeconv().


  Commit: 972c65bc59a4e85c0f5922dddf9354619fa3307f
      https://github.com/Perl/perl5/commit/972c65bc59a4e85c0f5922dddf9354619fa3307f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Return defaults for uncomputable langinfo items

Return the values from the C locale for nl_langinfo() items that aren't
computable on this platform.  If the platform has nl_langinfo(), then
all of them are computable, but if not, some can't be computed, and
others can be, but only if there are alternative methods available on
the platform.

As part of this commit, S_my_nl_langinfo() and S_save_to_buffer() are no
longer used when USE_LOCALE is not defined, so don't compile them.


  Commit: a376990bb6d0636dba3bc68609d7fda509d435e9
      https://github.com/Perl/perl5/commit/a376990bb6d0636dba3bc68609d7fda509d435e9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Rmv reimplementation of my_strftime()

Prior to this commit, there was a near duplicate copy of the code from
util.c that implements my_strftime().  This was done because the util.c
version zaps the wday field, which made it incompatible.

But it dawned on me that if the arbitrary date we use to do our
calculations were such that it was for a year in which January 1 falls
on a Sunday, then the util.c version automatically works.


  Commit: f4f5926ba1f40b548631418abcfe63c1d3226ea2
      https://github.com/Perl/perl5/commit/f4f5926ba1f40b548631418abcfe63c1d3226ea2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Shorten static function name

The extra syllable(s) are unnecessary noise


  Commit: 309bef3b53f4424c0992ec08bcd9ab597a40a460
      https://github.com/Perl/perl5/commit/309bef3b53f4424c0992ec08bcd9ab597a40a460
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Extend a static function

This will allow it to be used in situations where the buffer it controls
is single use, and we don't need to keep track of the size for future
calls.


  Commit: 606fcb89f78091ea912e83d35b745d6eb193f93c
      https://github.com/Perl/perl5/commit/606fcb89f78091ea912e83d35b745d6eb193f93c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use typedef to simplify

This allows some preprocessor conditionals to be removed


  Commit: 8715500adc2b656a70cbe863538e4d25295888d6
      https://github.com/Perl/perl5/commit/8715500adc2b656a70cbe863538e4d25295888d6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Rmv redundant cBOOL()

strEQ and && already return booleans


  Commit: 1b554eb5e371e070ef5eb39cda89850b093badcd
      https://github.com/Perl/perl5/commit/1b554eb5e371e070ef5eb39cda89850b093badcd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Fix currency symbol derivation

On platforms without nl_langinfo(), we derive the currency symbol from
localeconv().  The symbol must be tweaked to conform to nl_langinfo()
standards.  Prior to this commit, it guessed at how to tweak a rare
circumstance.  I now have seen evidence this guess was wrong, so give up
on it.

This also no longer returns just an empty string in certain cases.
nl_langinfo() itself doesn't, so conform to that.


  Commit: 6e528940b07bcd664c9449c3e1fe8adc0ee9ef56
      https://github.com/Perl/perl5/commit/6e528940b07bcd664c9449c3e1fe8adc0ee9ef56
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Don't add CP to Windows code page names

The actual name appears to be just the number for purposes of
nl_langinfo()-ish things.


  Commit: 072ef49723b331874f85a7674b5ece956b2da236
      https://github.com/Perl/perl5/commit/072ef49723b331874f85a7674b5ece956b2da236
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Don't ask a static fcn to be inlined

It's too complicated to really be inlined, and the compiler can figure
things out itself given it is a static function


  Commit: 8c25f1d9994f1fb4eedfdee93b0e2b36cf342347
      https://github.com/Perl/perl5/commit/8c25f1d9994f1fb4eedfdee93b0e2b36cf342347
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Rmv no longer used param from static fnc

Previous commits have gotten rid of this parameter to S_save_to_buffer


  Commit: c519156927c1753f4e0a7b62f38efa4439f08b37
      https://github.com/Perl/perl5/commit/c519156927c1753f4e0a7b62f38efa4439f08b37
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Don't change locale if already there

Changing the locale is cheap for some categories, but expensive for
others.  Changing LC_COLLATE is most expensive, requiring recalculation
of the collation transformation mapping.

This commit checks that we aren't already in the desired locale before
changing locales. and does nothing if no change is needed.


  Commit: 7696820deedd04a01d16131158c59f2fdb13a2f4
      https://github.com/Perl/perl5/commit/7696820deedd04a01d16131158c59f2fdb13a2f4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M intrpvar.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  Make three locale PL_ strings const char*

This adds some compile safety to these.


  Commit: d106c68a5712dafb5d5616b258e8179367b498d9
      https://github.com/Perl/perl5/commit/d106c68a5712dafb5d5616b258e8179367b498d9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use a scratch buf; instead of resuing old

This is in preparation for the next commit


  Commit: e16b9136803c626f11047f99bc52d478a0f60005
      https://github.com/Perl/perl5/commit/e16b9136803c626f11047f99bc52d478a0f60005
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Make static fcn reentrant

This makes my_langinfo() reentrant by adding parameters specifying where
to store the result.

This prepares for future commits, and fixes some minor bugs for XS
writers, in that the claim was that the buffer in calling
Perl_langinfo() was safe from getting zapped until the next call to it
in the same thread.  It turns out there were cases where, because of
internal calls, the buffer did get zapped.


  Commit: 54e476b0eac7a9be34a500656349b7e9c7591423
      https://github.com/Perl/perl5/commit/54e476b0eac7a9be34a500656349b7e9c7591423
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: langinfo: Use Windows fcn to find CODESET

There is a Windows function, available for quite a long time, that will
return the current code page.  Use this for the nl_langinfo() CODESET,
as that libc function isn't implemented on Windows.


  Commit: ed7cf2bf3f61c50647974cdcfdb9ffccc9bda19b
      https://github.com/Perl/perl5/commit/ed7cf2bf3f61c50647974cdcfdb9ffccc9bda19b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add static fcn to analyze locale codeset

It determines if the name indicates it is UTF-8 or not.  There are
several variant spellings in use, and this hides that from the the
callers.

It won't be actually used until the next commit


  Commit: ab5b75c0019d03280807a7cf59912d6128241733
      https://github.com/Perl/perl5/commit/ab5b75c0019d03280807a7cf59912d6128241733
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/I18N-Langinfo/Langinfo.pm
    M locale.c

  Log Message:
  -----------
  locale.c: Improve non-nl_langinfo() CODESET calc

Prior to this commit, on non-Windows platforms that don't have a
nl_langinfo() libc function, the code completely punted computation of
the CODESET item.  I have not been able to figure out how to do this,
even going to the locale definition files on disk (which may vary
anyway), but we can do a lot better than punting.

This commit adds three checks:

1) If the locale name is C or POSIX, we know the codeset

2) We can detect if a locale is UTF-8.  If it is, that is the codeset.
Many modern locales are of this ilk.

3) Failing that, some locales have the codeset appear in the name,
following a dot.

It isn't perfect, but it's a lot better than completely punting.


  Commit: f9c9af72963d10dd4da16ea7002b5ee4e3f0d692
      https://github.com/Perl/perl5/commit/f9c9af72963d10dd4da16ea7002b5ee4e3f0d692
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  New signature for static fcn my_langinfo()

This commit changes the calling sequence for my_langinfo to add the
desired locale (or a sentinel to indicate to use the current locale),
and the locale category of the desired item.

This allows the function to be able to return the desired value for any
locale, avoiding some locale changes that would happen until this
commit, and hiding the need for locale changes from outside functions,
though a couple continue to do so to avoid potential multiple changes.


  Commit: b7cd9af435cd33f4d5c447d14cd230787d86e473
      https://github.com/Perl/perl5/commit/b7cd9af435cd33f4d5c447d14cd230787d86e473
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add is_locale_utf8()

Previous commits have added the infrastructure to be able to determine
if a locale is UTF-8.  This will prove useful, and this commit adds
a function to encapsulate this information, and uses it in a couple of
places, with more to come in future commits.

This uses as a final fallback, mbtowc(), which some sources view was a
late adder to C89, and others as not really being available until C99.
Future commits will add heuristics when that function isn't available.


  Commit: 98c724416b39743ff4e66394c1864bc3d30c17c9
      https://github.com/Perl/perl5/commit/98c724416b39743ff4e66394c1864bc3d30c17c9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add fcn for UTF8ness determination

get_locale_string_utf8ness_i() will determine if the string it is passed
in the locale it is passed is to be treated as UTF-8, or not.


  Commit: 1fe839ca3699e458033d50cef6b60a4cf076c843
      https://github.com/Perl/perl5/commit/1fe839ca3699e458033d50cef6b60a4cf076c843
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M ext/POSIX/POSIX.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXX perldelta Move POSIX::localeconv() logic to locale.c

The code currently in POSIX.xs is moved to locale.c, and reworked some
to fit in that scheme, and the logic for the workaround for the Windows
broken localeconv() is made more robust.

This is in preparation for the next commit which will use this logic
instead of (imperfectly) duplicating it.

This also creates Perl_localeconv() for direct XS calls of this
functionality.


  Commit: e0fd01f5fae2d24585026651b03dafedbc2903f0
      https://github.com/Perl/perl5/commit/e0fd01f5fae2d24585026651b03dafedbc2903f0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Collapse duplicate logic into one instance

The previous commit move the logic for localeconv() into locale.c.  This
commit takes advantage of that to use it instead of repeating the logic.

On Windows, there is alternative way of finding the radix character for
systems that have a localeconv() that could cause a race.  Prior to this
commit, if that failed to find something that looked like the radix, it
returned a '?'.  Now it will drop down to using this new code, as the
likelihood of the race is small.

Notably, this commit removes the inconsistent duplicate logic that had
been used to deal with the Windows broken localeconv() bug.


  Commit: 6e304c0c21133a2a88a7f4d50686877ff381beca
      https://github.com/Perl/perl5/commit/6e304c0c21133a2a88a7f4d50686877ff381beca
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Fix windows bug with broken localeconv()

localeconv() was broken on Windows until VS 2015.  As a workaround, this
was using my_snprintf() to find what the decimal point character is,
trying to avoid our workaround for localeconv(), which has a (slight)
chance of a race condition.

The problem is that my_snprintf() might not end up calling snprintf at
all; I didn't trace all possibilities in Windows.  So it doesn't make
for a reliable sentinel.

This commit now specifically uses libc snprintf(), and if it fails, drops
down to try localeconv().


  Commit: 19fb1aa6cdbc84901a876f5a0caf0135687bb186
      https://github.com/Perl/perl5/commit/19fb1aa6cdbc84901a876f5a0caf0135687bb186
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M ext/POSIX/POSIX.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXXdelta Add my_strftime8()

This is like plain my_strftime(), but additionally returns an indication
of the UTF-8ness of the returned string


  Commit: be05febfc179086fd229b29d442153df3dd3b7db
      https://github.com/Perl/perl5/commit/be05febfc179086fd229b29d442153df3dd3b7db
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Add utf8ness return param to static fcn

my_langinfo_i() now will additionally return the UTF-8ness of the
returned string.


  Commit: 0958d1fc121234f2d49f757e9ef8570b9fced99c
      https://github.com/Perl/perl5/commit/0958d1fc121234f2d49f757e9ef8570b9fced99c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M ext/I18N-Langinfo/Langinfo.xs
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXXdelta Add Perl_langinfo8()

This is like Perl_langinfo() but additionally returns information about
the UTF-8ness of the returned string.


  Commit: 98479f9bc66fd07a164d8a7beafeebe9eec0f431
      https://github.com/Perl/perl5/commit/98479f9bc66fd07a164d8a7beafeebe9eec0f431
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add fallbacks if no mbtowc()

This add heuristics that work well for non-English locales to determine
if a locale is UTF-8 or not when mbtowc() isn't available.  It would be
a very rare compiler that didn't have that these days, but this covers
that case as best as I have been able to figure out.


  Commit: 7ada11f5c3bbdd6783ca7d8d4b2de9ece54a9fd6
      https://github.com/Perl/perl5/commit/7ada11f5c3bbdd6783ca7d8d4b2de9ece54a9fd6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use Strerror(), not strerror()


  Commit: 5e33ad701198dcf94ead54588ce223cc3e0e2c23
      https://github.com/Perl/perl5/commit/5e33ad701198dcf94ead54588ce223cc3e0e2c23
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Refactor #ifdef's for clarity

The my_strerror() function has effectively 5 different implementations
depending on the capabilities of the platform.  Only a few lines are
common to all, the set-up and the return.  The #ifdefs obscure the
underlying logic.  So this commit separates them out into 5 different
functions, with the result that it's clear what is going on in each.


  Commit: 53b320de5d49a35d21745476e7452072e357f1e7
      https://github.com/Perl/perl5/commit/53b320de5d49a35d21745476e7452072e357f1e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Avoid mojibake in "$!"

In stress testing, I discovered that the LC_CTYPE and LC_MESSAGES
locales need to be the same locale, or strerror() can return
question marks or mojibake instead of the proper message.

This commit refactors the handling of stringifying "$!" to make the
locales of both categories the same during the stringification.

Actually, I suspect it isn't the locale, but the codeset of the locale
that needs to be the same.  I suspect that if the categories were both
in different UTF-8 locales, or both in single-byte locales, that things
would work fine.  But it's cheaper to find the locale rather than the
locale's codeset, so that is what is done.


  Commit: cdbf84ea2c0ffc225849ed0689b851936ca779d0
      https://github.com/Perl/perl5/commit/cdbf84ea2c0ffc225849ed0689b851936ca779d0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M makedef.pl
    M mg.c
    M proto.h

  Log Message:
  -----------
  Move utf8ness calc for $! into locale.c from mg.c

locale.c has the infrastructure to handle this, so remove repeated
logic.

The removed code tried to discern better based on using script runs, but
this actually doesn't help, so is removed.


  Commit: 421fd78febf67d9ba2a331a0dfc269156b2d2cc9
      https://github.com/Perl/perl5/commit/421fd78febf67d9ba2a331a0dfc269156b2d2cc9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M mg.c

  Log Message:
  -----------
  mg.c: White-space only

Indent newly formed block from the previous commit.


  Commit: 056871977b5fd049a18a88920e6b37e33df293a1
      https://github.com/Perl/perl5/commit/056871977b5fd049a18a88920e6b37e33df293a1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M embedvar.h
    M intrpvar.h
    M locale.c
    M proto.h
    M sv.c

  Log Message:
  -----------
  locale.c: Rmv no longer used code; UTF8ness cache

What these functions do has been subsumed by code introduced in previous
commits, and in a more straight forward manner.

Also removed in this commit is the cache of the knowing what locales are
UTF-8 or not.  This data is now cheaper to calculate when needed, and
there is now a single entry cache, so I don't think the complexity
warrants keeping it.

It could be added back if necessary, split off from the remainder of
this commit.


  Commit: 8b0e689d09875bdde98dcfb12f9f2c5446647a58
      https://github.com/Perl/perl5/commit/8b0e689d09875bdde98dcfb12f9f2c5446647a58
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Don't discard locale info in starting P2008

The program is started in the global locale, and then is converted to
the POSIX 2008 per-thread locale API.  Prior to this commit the startup
locale was discarded.  It really should be the foundation for the 2008
locales.  I don't know of any current paths through the code that this
makes a difference for, but it is a potential hole that is easy to plug.


  Commit: f722e718415b33486007fd8a41f2ecf5231e62c6
      https://github.com/Perl/perl5/commit/f722e718415b33486007fd8a41f2ecf5231e62c6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M perl.h
    M proto.h

  Log Message:
  -----------
  Add a common locale panic macro and functions

This will make sure that all the necessary clean up gets done.


  Commit: 4bcbb807d3e25450b591d9c90f75ec2ac487bb11
      https://github.com/Perl/perl5/commit/4bcbb807d3e25450b591d9c90f75ec2ac487bb11
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Revamp sync_locale()

This rarely used function was actually failing to do what it purported
in some Configurations.


  Commit: cf62c323b84774290fc657bff33d8fe41a2787a2
      https://github.com/Perl/perl5/commit/cf62c323b84774290fc657bff33d8fe41a2787a2
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Clean up thread_locale_init()

We can use internal functions to this file instead of the API ones here.
This commit also calls  sync_locale() to avoid repeated logic.


  Commit: 000e343b162b3b93a64f72baff019dd3080034a7
      https://github.com/Perl/perl5/commit/000e343b162b3b93a64f72baff019dd3080034a7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  Revamp switch_to_global_locale()

Prior to this commit, the global locale was not always getting populated
with the values from the thread being switched.


  Commit: 3139a4749b7221f166f89e58dc9f6ce5a35e882f
      https://github.com/Perl/perl5/commit/3139a4749b7221f166f89e58dc9f6ce5a35e882f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Omit an extra copy

In this case in Perl_setlocale(), we can just return the plain result
from setlocale(), as, if something further needs to be done that would
destroy it, that is taken care of already at the time.

On per-thread locale platforms, the result already is in a per-category
buffer.


  Commit: bfa01a4a6a25cae268e55a8b53b6a8427363fc8b
      https://github.com/Perl/perl5/commit/bfa01a4a6a25cae268e55a8b53b6a8427363fc8b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M sv.c

  Log Message:
  -----------
  locale.c: Cache the current LC_CTYPE locale name

This is now used as a cache of length 1 to avoid having to lookup up the
UTF-8ness as often.

There was a complicated cache previously, but changes to the logic
caused that to be much less necessary, and it is no longer actually
used, and will be removed in a later commit.

But it's pretty easy to keep this single value around to cut further
down the new scheme's need to look it up


  Commit: e4980bab1cc86438de11d1c61f774902060e2183
      https://github.com/Perl/perl5/commit/e4980bab1cc86438de11d1c61f774902060e2183
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M intrpvar.h

  Log Message:
  -----------
  intrpvar.h: Initialize a variable

I don't believe there is a bug with this PL_numeric_name being
uninitialized, but this is an easy precaution.


  Commit: 994ecac87070a64813e4850141f1efeb33c55f65
      https://github.com/Perl/perl5/commit/994ecac87070a64813e4850141f1efeb33c55f65
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  Swap the ordering of two locale category indices

Perl internally uses a mapping of locale category values into a
consecutive sequence of indices starting at 0.  These are used as
indexes into arrays.  The reason is that the category numbers are
opaque, vary by platform, aren't necessarily sequential, and hence are
hard to make table driven code for.

This commit makes the LC_CTYPE index 0, and LC_NUMERIC equal to 1;
swapping them.  The reason is to cause LC_CTYPE to get done first in the
many loops through the categories.  The UTF8ness of categories is an
often needed value, and most of the time the categories will have the
same locale.  LC_CTYPE is needed to calculate the UTF8ness, and by doing
it first and caching the result, the other categories likely
automatically will use the same value, without having to recalculate.


  Commit: caeb64221f81c12686f54230a36b0df2698cb671
      https://github.com/Perl/perl5/commit/caeb64221f81c12686f54230a36b0df2698cb671
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use new mechanism to save/restore errno

Instead of explicitly saving the errno around debugging statements, the
new more general mechanism is used.


  Commit: f2d7da159b372040e0900ab63920fdb9dce10efe
      https://github.com/Perl/perl5/commit/f2d7da159b372040e0900ab63920fdb9dce10efe
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Move DEBUG location info

This commit takes advantage of the new mechanism to add common DEBUGGING
code to print the __FILE__ and __LINE__ of every debugging statement.
This allows those to be removed from each statement, and have them
implicitly added.

This make things consistent, and easier to read and add new statements.


  Commit: dae40f02d587f0576e1e4e2ea2700af94e4f64f5
      https://github.com/Perl/perl5/commit/dae40f02d587f0576e1e4e2ea2700af94e4f64f5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add some asserts


  Commit: 4658102ab3dfdb5391287f87b219f1d45cac6b63
      https://github.com/Perl/perl5/commit/4658102ab3dfdb5391287f87b219f1d45cac6b63
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Reorder code, rmv unneeded conditional

Previous commits have made the conditional about being able to find the
radix character unnecessary.  The called function my_langinfo_c()
handles the case properly.

This commit also makes the trivial case first in a conditional, as that
is easier to comprehend.


  Commit: e02af2a7ad1f6f5514dc6c714d0a67bb87bfd7ab
      https://github.com/Perl/perl5/commit/e02af2a7ad1f6f5514dc6c714d0a67bb87bfd7ab
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Reorder 'if' branches

It's better for understandability to have positive tests than negative
ones


  Commit: c5c7225de2af2d016f9aaa299e68a240cc1266d7
      https://github.com/Perl/perl5/commit/c5c7225de2af2d016f9aaa299e68a240cc1266d7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Refactor a static function

S_new_numeric() is called after the LC_NUMERIC category is changed, to
update various ancillary information Perl keeps.

This reorders the function so that on POSIX 2008 platforms, the numeric
object is created earlier.  This allows for fewer operations on those
platforms, as we already have the correct value in place for querying
what the radix and thousands separator characters are.

Explanatory comments are also added.


  Commit: ab24affb2b4c04e21b8f113b1f984a9b13b5a1eb
      https://github.com/Perl/perl5/commit/ab24affb2b4c04e21b8f113b1f984a9b13b5a1eb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Change assert() into STATIC_ASSERT()


  Commit: cf158b7915374dd2f2e41d3fe0fa37b979f3c074
      https://github.com/Perl/perl5/commit/cf158b7915374dd2f2e41d3fe0fa37b979f3c074
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use standard fold table for C locale

Copy the standard compiled-in ASCII fold table when the locale is C or
POSIX, instead of looping through all 256 characters and computing them.
This saves some time as well as ensures that any platform bugs become
irrelevant.


  Commit: 7c3e510b5c9ab69c162e4597ecc27563ee3d3953
      https://github.com/Perl/perl5/commit/7c3e510b5c9ab69c162e4597ecc27563ee3d3953
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add check that strxfrm didn't fail

The code failed to take into account that strxfrm() can fail for reasons
besides buffer length.  It does not return errors, and the only way to
check is to set errno to 0 beforehand, and check that it is still 0
afterwards.


  Commit: 554430567b53e6dea383f7ce40560a8a6d616296
      https://github.com/Perl/perl5/commit/554430567b53e6dea383f7ce40560a8a6d616296
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Don't assume LC_CTYPE, LC_COLLATE are same

This code is using isCNTRL_LC which depends on LC_CTYPE to verify that
something in the LC_COLLATE locale is a control.  That only works
properly if the two locales are the same.  This commit adds code to
ensure they are.


  Commit: a26356248948017d785984990c11c494f72d6112
      https://github.com/Perl/perl5/commit/a26356248948017d785984990c11c494f72d6112
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: strxfrm() requires LC_CTYPE eq LC_COLLATE

The libc functions strxfrm() on some platforms requires the LC_CTYPE
locale to be the same as the LC_COLLATE locale (or rather, probably that
they have the same code set, but checking for locale is cheaper).
Otherwise mojibake would result, or more likely the function will fail,
setting errno.

This commit brings the locales into alignment if necessary


  Commit: 6b6c099b5621c14c762f0b3b4c55e6a9a0a7ffe7
      https://github.com/Perl/perl5/commit/6b6c099b5621c14c762f0b3b4c55e6a9a0a7ffe7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M Configure
    M Cross/config.sh-arm-linux
    M Cross/config.sh-arm-linux-n770
    M NetWare/config.wc
    M Porting/config.sh
    M config_h.SH
    M configure.com
    M metaconfig.h
    M plan9/config_sh.sample
    M uconfig.h
    M uconfig.sh
    M uconfig64.sh
    M win32/config.gc
    M win32/config.vc

  Log Message:
  -----------
  Configure: strxfrm_l


  Commit: 50f92562bcaf57b3649295be7715257a53bc5ea4
      https://github.com/Perl/perl5/commit/50f92562bcaf57b3649295be7715257a53bc5ea4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M lib/locale.t

  Log Message:
  -----------
  XXX temp: Windows debug


  Commit: 4a61da555f3db32ee31a63ece7c05d94d2960ba0
      https://github.com/Perl/perl5/commit/4a61da555f3db32ee31a63ece7c05d94d2960ba0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Use strxfrm_l() if available

This more modern version of the function doesn't require us to change
locales.


  Commit: e223a0f807924502c772be71bcc0a1fbf1572e98
      https://github.com/Perl/perl5/commit/e223a0f807924502c772be71bcc0a1fbf1572e98
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M mathoms.c
    M proto.h
    M sv.c

  Log Message:
  -----------
  Change name of internal function

This is in preparation for working on it; the new name, mem_collxfrm_ is
in compliance with the C Standard; the old was not.


  Commit: 547c4be77291c5febe963d398ff89fd563fad6e0
      https://github.com/Perl/perl5/commit/547c4be77291c5febe963d398ff89fd563fad6e0
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M ext/POSIX/POSIX.xs
    M ext/POSIX/lib/POSIX.pod
    M locale.c
    M proto.h

  Log Message:
  -----------
  XXXdelta Fix POSIX::strxfrm()

This function takes an SV containing a PV.  The encoding of that PV is
based on the locale of the LC_CTYPE locale.  It really doesn't make
sense to collate based off of the sequencing of a different locale, which
prior to this commit it would do if the LC_COLLATION locale were
different.


  Commit: 76ee564c864051075054c9d6c9fe45d6107f5d35
      https://github.com/Perl/perl5/commit/76ee564c864051075054c9d6c9fe45d6107f5d35
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Improve debugging for mem_collxfrm()

This prints out more information, better organized.

It also moves up the info from -DLv to plain -DL


  Commit: 83e084726c37ced63919e0353ffa3ef2e00b1a54
      https://github.com/Perl/perl5/commit/83e084726c37ced63919e0353ffa3ef2e00b1a54
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Add debug statement for collation failure

Perhaps this should be a warning to the user that we couldn't calculate
collation info for the locale, but at least there should be a way to
get that info from a DEBUG statement


  Commit: 9a3766648aae9a57b4354440a85f52755e2737e6
      https://github.com/Perl/perl5/commit/9a3766648aae9a57b4354440a85f52755e2737e6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c: Print code point in hex, not decimal

Hex is the more familiar form


  Commit: 3ae0f4ebe3d0602930e1c8b22757d7a2f83971d6
      https://github.com/Perl/perl5/commit/3ae0f4ebe3d0602930e1c8b22757d7a2f83971d6
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs
    M locale.c
    M perl.h

  Log Message:
  -----------
  Mark certain mutex lock macros as private

mbtowc() mblen(), and wctomb() should not be directly used by XS
writers; instead use the POSIX versions.  Don't encourage the direct use
by having public macros to aid in their use.


  Commit: a45de4878c22017a6419896feb00478ca3bfc299
      https://github.com/Perl/perl5/commit/a45de4878c22017a6419896feb00478ca3bfc299
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move some code around

This is purely to make future commits have smaller real difference
listings, and involves a temporary (complemented) copy of a preprocessor
conditional.


  Commit: beedfaf673ab178d62f0c989ba235adb18fffbdd
      https://github.com/Perl/perl5/commit/beedfaf673ab178d62f0c989ba235adb18fffbdd
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Reorder cpp branches

Disposing of the trivial case first makes things easier to read.


  Commit: 7107f0708f157b9c4db40f71070fd21888d5d680
      https://github.com/Perl/perl5/commit/7107f0708f157b9c4db40f71070fd21888d5d680
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.h
    M sv.c

  Log Message:
  -----------
  Make the locale mutex a general semaphore

Future commits will use this new capability, and in Configurations where
no locale locking is currently necessary.


  Commit: a10907ced4856d81e52360fcd6be64e3f12a8ef1
      https://github.com/Perl/perl5/commit/a10907ced4856d81e52360fcd6be64e3f12a8ef1
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embedvar.h
    M intrpvar.h
    M makedef.pl
    M perl.h
    M perlvars.h
    M sv.c

  Log Message:
  -----------
  Use general locale mutex for numeric operations

This commit removes the separate mutex for locking locale-related
numeric operations on threaded perls; instead using the general locale
one.  The previous commit made that a general semaphore, so now suitable
for use for this purpose as well.

This means that the locale can be locked for the duration of some
sprintf operations, longer than before this commit.  But on most modern
platforms, thread-safe locales cause this lock to expand just to a
no-op; so there is no effect on these.  And on the impacted platforms,
one is not supposed to be using locales and threads in combination, as
races can occur.  This lock is used on those perls to keep Perl's
manipulation of LC_NUMERIC thread-safe.  And for those there is also no
effect, as they already lock around those sprintf's.


  Commit: 60b342c518619ff0391066b23863729c7cc5cc4a
      https://github.com/Perl/perl5/commit/60b342c518619ff0391066b23863729c7cc5cc4a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  Add locale macro to wrap static-space-using fncs

Some functions return a result in a global-to-the-program buffer, or
they have an internal global buffer.  Other threads must be kept from
simultaneously using that function.  This macro is to be used for all
such ones dealing with locales.  Ideally, there would be a separate mutex
for each such buffer space.  But these functions also have to lock the
locale from changing during their execution, and there aren't that many
such functions, and they actually are rarely executed.  So a single lock
will do.

This will allow future commits to have more targeted locking for
functions that don't affect the global locale.


  Commit: aca9ded9393fd45b8e8a1636ec06e0e53f41e25f
      https://github.com/Perl/perl5/commit/aca9ded9393fd45b8e8a1636ec06e0e53f41e25f
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  Redefine the POSIX.xs locale macros using prev commit

This commit uses the new macro introduced in the previous commit to
define the internal locale mutex macros in POSIX.xs


  Commit: 2a68fe1e4d4efe7a982dbfc64f5d69896427a535
      https://github.com/Perl/perl5/commit/2a68fe1e4d4efe7a982dbfc64f5d69896427a535
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  perl.h: Remove NL_LANGINFO_LOCK

This is needed in precisely one place in the code, so move it to there.


  Commit: e99ad2d2ed4ae53c7adfb53994d8842720ad123e
      https://github.com/Perl/perl5/commit/e99ad2d2ed4ae53c7adfb53994d8842720ad123e
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  perl.h: Remove LOCALECONV_LOCK

This is needed in just one function, in locale.c, so more it there.


  Commit: 0333859ef0a6a8cc09d5dc47ec0c01c729d2cd0c
      https://github.com/Perl/perl5/commit/0333859ef0a6a8cc09d5dc47ec0c01c729d2cd0c
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c
    M perl.h

  Log Message:
  -----------
  XXX perlembed Add PORCELAIN_SETLOCALE_LOCK/UNLOCK

This macro is used to surround raw setlocale() calls so that the return
value in a global static buffer can be saved without interference with
other threads.

There are a few very rarely occurring instances in locale.c that are
converted to use this.  These previously could have been races.

The raw setlocales in the initialization function are not guarded, as
these happen early in the Perl process initialization, before threading
is enabled.

This is buggy if there are multiple embedded perls.  It can't be helped.
perlembed is being updated to indicate this.


  Commit: 88f8fd3e67e0348727c61ebbe769ccc70a2bc8ff
      https://github.com/Perl/perl5/commit/88f8fd3e67e0348727c61ebbe769ccc70a2bc8ff
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move #defining SETLOCALE_LOCK

This simplifies slightly, and will allow further simplification


  Commit: 532365784d67a795041350cef4e1fafdc534da78
      https://github.com/Perl/perl5/commit/532365784d67a795041350cef4e1fafdc534da78
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move LOCALE_READ_LOCK #definition

To enable future simplifications


  Commit: 557533f216310b464fa8993627525d197b5af711
      https://github.com/Perl/perl5/commit/557533f216310b464fa8993627525d197b5af711
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M intrpvar.h
    M locale.c
    M makedef.pl
    M perl.c
    M perl.h
    M sv.c

  Log Message:
  -----------
  locale.c: Move #define to perl.h; use it elsewhere

 Rather than recalculate this combined conditional, do it once in
 perl.h.


  Commit: 934a01f941551f645f1202a11a3cbed00eca5cd4
      https://github.com/Perl/perl5/commit/934a01f941551f645f1202a11a3cbed00eca5cd4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Mitigate unsafe threaded locales

This a new set of macros and functions to do locale changing and
querying for platforms where perl is compiled with threads, but the
platform doesn't have thread-safe locale handling.

All it does is:

1) The return of setlocale() is always safely saved in a per-thread
buffer, and
2) setlocale() is protected by a mutex from other threads which are
using perl's locale functions.

This isn't much, but it might be enough to get some programs to work on
such platforms which rarely change or query the locale.


  Commit: 19b08a054d7c3608b647bd24013ce42aafe7c6b8
      https://github.com/Perl/perl5/commit/19b08a054d7c3608b647bd24013ce42aafe7c6b8
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX make sure comments get moved appropriately perl.h: Remove now empty block

Previous commits have left this empty except for comments.


  Commit: 7efde917e085a44f973ba0d61abadc3166f30668
      https://github.com/Perl/perl5/commit/7efde917e085a44f973ba0d61abadc3166f30668
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M pp.c

  Log Message:
  -----------
  XXX pp.c: do %g print under mutex,


  Commit: 2872170ce1dac14fb774e75e739a94237772058b
      https://github.com/Perl/perl5/commit/2872170ce1dac14fb774e75e739a94237772058b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ebcdic_tables.h
    M embedvar.h
    M globvar.sym
    M inline.h
    M intrpvar.h
    M perl.h
    M regen/ebcdic.pl

  Log Message:
  -----------
  Make fc(), /i thread-safe on participating platforms

A long standing bug in Perl that has gone undetected is that the array
is global that is created when changing locales and tells fc() and qr//i
matching what the folds are in the new locale.

What this means is that any program only has one set of fold definitions
that apply to all threads within it, even if we claim that the locales
are thread-safe on the given platform.  One possibility for this going
undetected so long is that no one is using locales on multi-threaded
systems much.  Another possibility is that modern UTF-8 locales have the
same set of folds as any other one.

It is a simple matter to make the fold array per-thread instead of
per-process, and that solves the problem transparently to other code.

I discovered this stress-testing locale handling under threads.  That
test will be added in a future commit.


  Commit: 88ca4d49fab85a715cac1137f24599db60be9816
      https://github.com/Perl/perl5/commit/88ca4d49fab85a715cac1137f24599db60be9816
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M inline.h
    M locale.c

  Log Message:
  -----------
  XXX temp debug? locale.c, inline.h:foldEQ_locale


  Commit: b3d8b91828495cef72fdae534bee747104c3886b
      https://github.com/Perl/perl5/commit/b3d8b91828495cef72fdae534bee747104c3886b
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  locale.c comments


  Commit: 39598badda62a7e2452b2042936011f225d34ace
      https://github.com/Perl/perl5/commit/39598badda62a7e2452b2042936011f225d34ace
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M locale.c

  Log Message:
  -----------
  XXX prob drop; done before anything so no races


  Commit: c3443eee20eacec40bfc0c243a0134159ebfd240
      https://github.com/Perl/perl5/commit/c3443eee20eacec40bfc0c243a0134159ebfd240
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Add #define for gwENVr_LOCALEr_UNLOCK

This is for functions that read the locale and environment and write to
some global space.


  Commit: 243cde3608ebddb13726f70dbd0337b7c63c0729
      https://github.com/Perl/perl5/commit/243cde3608ebddb13726f70dbd0337b7c63c0729
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h
    M time64.c

  Log Message:
  -----------
  Remove ENV_LOCALE_LOCK/UNLOCK macros

These are subsumed by gwENVr_LOCALEr_LOCK created in the previous
commit.


  Commit: a02d30996fa6ae4782ef0b6c5e09b05a73712414
      https://github.com/Perl/perl5/commit/a02d30996fa6ae4782ef0b6c5e09b05a73712414
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h
    M time64.c
    M util.c

  Log Message:
  -----------
  Change ENV/LOCALE locking read macro names

The old name was confusing.


  Commit: b6debe418e4d2da24dfe43f44a0bc5daae037eb5
      https://github.com/Perl/perl5/commit/b6debe418e4d2da24dfe43f44a0bc5daae037eb5
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  perl.h: Move some statements

So they are closer to related statements


  Commit: ab178c1f84a02d249511ea301f9de5a041293b8d
      https://github.com/Perl/perl5/commit/ab178c1f84a02d249511ea301f9de5a041293b8d
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h
    M util.c

  Log Message:
  -----------
  perl.h: Finish implementing combo ENV/LOCALE mutexes

There are cases where an executing function is vulnerable to either the
locale or environment being changed by another thread.  This commit
implements macros that use mutexes to protect these critical sections.
There are two cases that exist:  one where the functions only read; and
one where they can also need exclusive control so that a competing
thread can't overwrite the returned static buffer before it is safely
copied.

5.32 had a placeholder for these, but didn't actually implement it.
Instead it locked just the ENV portion.  On modern platforms with
thread-safe locales, the locale portion is a no-op anyway, so things
worked on them.

This new commit extends that safety to other platforms.  This has long
been a vulnerability in Perl.


  Commit: b5572c484d182f1e2458576ccf8f2e0c99d2bb67
      https://github.com/Perl/perl5/commit/b5572c484d182f1e2458576ccf8f2e0c99d2bb67
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M time64.c

  Log Message:
  -----------
  time64.c: Remove no longer needed code

This code defined some macros; those are now defined by perl.h


  Commit: c5ab3a45b756137be869edf0b1e0a68795b76436
      https://github.com/Perl/perl5/commit/c5ab3a45b756137be869edf0b1e0a68795b76436
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M pp_sys.c

  Log Message:
  -----------
  XXX need to StructCopy pp_sys mutexes


  Commit: 30a6d9bf2018d35b426564ffebc62e2f12f9b21a
      https://github.com/Perl/perl5/commit/30a6d9bf2018d35b426564ffebc62e2f12f9b21a
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M win32/win32.c

  Log Message:
  -----------
  win32.c: Add mutexes around some calls

These could have races.


  Commit: bfd4f1f9e42b67ad0007b8f9b5d0e6e2569558ea
      https://github.com/Perl/perl5/commit/bfd4f1f9e42b67ad0007b8f9b5d0e6e2569558ea
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M util.c

  Log Message:
  -----------
  util.c: mktime needs to run under a mutex

per the Posix standard


  Commit: 1319f7b93d8a44f1fbe40f90269aab51854cba00
      https://github.com/Perl/perl5/commit/1319f7b93d8a44f1fbe40f90269aab51854cba00
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M dist/ExtUtils-ParseXS/lib/perlxs.pod
    M t/porting/known_pod_issues.dat

  Log Message:
  -----------
  perlxs


  Commit: aa07c1fa75077d6ce47520032b9d89a8f10d69c9
      https://github.com/Perl/perl5/commit/aa07c1fa75077d6ce47520032b9d89a8f10d69c9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs

  Log Message:
  -----------
  POSIX.xs env locks, check file for more


  Commit: a46befb5bf72c51fa3872d24de12d3c8dcc70229
      https://github.com/Perl/perl5/commit/a46befb5bf72c51fa3872d24de12d3c8dcc70229
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cygwin/cygwin.c

  Log Message:
  -----------
  cygwin


  Commit: 92314b35765b3a5f5a9cb2060849a16b122b8fb9
      https://github.com/Perl/perl5/commit/92314b35765b3a5f5a9cb2060849a16b122b8fb9
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M os2/os2.c

  Log Message:
  -----------
  os2: Use many reader lock instead of exclusive

This is just reading the environment, not changing it, so a many readers
can be accessing it at the same time.


  Commit: 3aef5220c2ae2e950895208c94c06407175499cb
      https://github.com/Perl/perl5/commit/3aef5220c2ae2e950895208c94c06407175499cb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.pm
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  XXX cpan PR Time-Piece: Add locks

This add mutex locking around some unsafe thread operations to make this
module thread-safe.


  Commit: 926b1a0b44dbd332e94aa75f7ebb011bb4511bcb
      https://github.com/Perl/perl5/commit/926b1a0b44dbd332e94aa75f7ebb011bb4511bcb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  Time-Piece: Use foldEQ_locale() if available

This supported core function is thread-safe and knows about Perl
internals, so is preferable to the similar libc function, which is now
used only as a fallback.  This commit also bomb proofs the code by
adding an additional fallback, specified in C89, which isn't a great
substituted, but far better than nothing.


  Commit: 69e587839fedcb0769db36e2383e9427e9d30d51
      https://github.com/Perl/perl5/commit/69e587839fedcb0769db36e2383e9427e9d30d51
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  Time-Piece: Use isSPACE, not isspace

The latter gives results that are dependent on the program's underlying
locale, and so may be inconsistent.

If locale dependence is actually desired, isSPACE_LC should be used, as
it knows about various things the module writer shouldn't have to
concern themselves with.  It is supported since 5.004


  Commit: c0341c61a4679d27d3f0ae4a93e615e1d6d8f842
      https://github.com/Perl/perl5/commit/c0341c61a4679d27d3f0ae4a93e615e1d6d8f842
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  Time-Piece: Use isDIGIT, not isdigit

The latter gives results that are dependent on the program's underlying
locale, and so may be inconsistent.

If locale dependence is actually desired, isDIGIT_LC should be used, as
it knows about various things the module writer shouldn't have to
concern themselves with.  It is supported since 5.004


  Commit: 3e5fb58ea2f28cce26667b2573ad2791c41819ac
      https://github.com/Perl/perl5/commit/3e5fb58ea2f28cce26667b2573ad2791c41819ac
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs

  Log Message:
  -----------
  Time-Piece: Use isUPPER, not isupper

The latter gives results that are dependent on the program's underlying
locale, and so may be inconsistent.

If locale dependence is actually desired, isUPPER_LC should be used, as
it knows about various things the module writer shouldn't have to
concern themselves with.  It is supported since 5.004


  Commit: e1ed53e7f91a35989f7878fdadc19866d9282fcb
      https://github.com/Perl/perl5/commit/e1ed53e7f91a35989f7878fdadc19866d9282fcb
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M pod/perlhacktips.pod

  Log Message:
  -----------
  XXX incomplete perlhacktips:


  Commit: 2a40ac1728a460e790942973f2dde45e7dc41afc
      https://github.com/Perl/perl5/commit/2a40ac1728a460e790942973f2dde45e7dc41afc
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M dist/IO/IO.pm
    M dist/IO/IO.xs

  Log Message:
  -----------
  XXX check if using ppport IO.xs: Remove fallback code furnished by ppport


  Commit: dd0ce20f2aeb2795dac06317577040e26c4bc6e7
      https://github.com/Perl/perl5/commit/dd0ce20f2aeb2795dac06317577040e26c4bc6e7
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M hints/freebsd.sh

  Log Message:
  -----------
  XXX check with freebsd: hints/freebsd.sh


  Commit: 084bf1bb571ac1a033a890a5993691d958679714
      https://github.com/Perl/perl5/commit/084bf1bb571ac1a033a890a5993691d958679714
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M thread.h

  Log Message:
  -----------
  thread.h: White-space, braces only


  Commit: ef47fd0a6b2e8e41b027ecfe1442188c166965c3
      https://github.com/Perl/perl5/commit/ef47fd0a6b2e8e41b027ecfe1442188c166965c3
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M thread.h

  Log Message:
  -----------
  XXX thread.h Save errno around lock/unlock


  Commit: 3264abc2155c9615358ee11851079e6a45303e15
      https://github.com/Perl/perl5/commit/3264abc2155c9615358ee11851079e6a45303e15
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M perl.h

  Log Message:
  -----------
  XXX perl.h: Debugging mutex lock'


  Commit: 6e54dc2627c1c5860a95d9b810db84e9209f7503
      https://github.com/Perl/perl5/commit/6e54dc2627c1c5860a95d9b810db84e9209f7503
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M cpan/Time-Piece/Piece.xs
    M handy.h
    M iperlsys.h
    M locale.c
    M perl.h
    M regen/reentr.pl
    M regexec.c
    M util.c

  Log Message:
  -----------
  Notes


  Commit: 4900f5769f86778a85c360a9e967f90e87ca7955
      https://github.com/Perl/perl5/commit/4900f5769f86778a85c360a9e967f90e87ca7955
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M ext/POSIX/POSIX.xs
    M locale.c
    M perl.h

  Log Message:
  -----------
  locks


  Commit: 2ebd3e1e4aee5f63978377f151cfbb880bcd1df4
      https://github.com/Perl/perl5/commit/2ebd3e1e4aee5f63978377f151cfbb880bcd1df4
  Author: Karl Williamson <khw@cpan.org>
  Date:   2021-03-22 (Mon, 22 Mar 2021)

  Changed paths:
    M lib/locale_threads.t

  Log Message:
  -----------
  l


Compare: https://github.com/Perl/perl5/compare/99f701e5efe3%5E...2ebd3e1e4aee



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