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From a0eaa97e59b5b2ad8e2a83f8509da3787ff4b4bf Mon Sep 17 00:00:00 2001
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From: Jitka Plesnikova <jplesnik@redhat.com>
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Date: Thu, 24 May 2018 11:32:01 +0200
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Subject: [PATCH] Upgrade to 2.22
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---
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lib/threads.pm | 29 ++++++++++++++++++++++++++++-
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threads.xs | 4 ++++
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2 files changed, 32 insertions(+), 1 deletion(-)
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diff --git a/lib/threads.pm b/lib/threads.pm
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index 2eb926a..1b99567 100644
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--- a/lib/threads.pm
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+++ b/lib/threads.pm
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@@ -5,7 +5,7 @@ use 5.008;
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use strict;
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use warnings;
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-our $VERSION = '2.21'; # remember to update version in POD!
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+our $VERSION = '2.22'; # remember to update version in POD!
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my $XS_VERSION = $VERSION;
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$VERSION = eval $VERSION;
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@@ -937,6 +937,33 @@ C<chdir()>) will affect all the threads in the application.
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On MSWin32, each thread maintains its own the current working directory
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setting.
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+=item Locales
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+
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+Prior to Perl 5.28, locales could not be used with threads, due to various
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+race conditions. Starting in that release, on systems that implement
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+thread-safe locale functions, threads can be used, with some caveats.
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+This includes Windows starting with Visual Studio 2005, and systems compatible
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+with POSIX 2008. See L<perllocale/Multi-threaded operation>.
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+
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+Each thread (except the main thread) is started using the C locale. The main
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+thread is started like all other Perl programs; see L<perllocale/ENVIRONMENT>.
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+You can switch locales in any thread as often as you like.
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+
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+If you want to inherit the parent thread's locale, you can, in the parent, set
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+a variable like so:
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+
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+ $foo = POSIX::setlocale(LC_ALL, NULL);
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+
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+and then pass to threads->create() a sub that closes over C<$foo>. Then, in
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+the child, you say
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+
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+ POSIX::setlocale(LC_ALL, $foo);
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+
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+Or you can use the facilities in L<threads::shared> to pass C<$foo>;
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+or if the environment hasn't changed, in the child, do
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+
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+ POSIX::setlocale(LC_ALL, "");
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+
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=item Environment variables
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Currently, on all platforms except MSWin32, all I<system> calls (e.g., using
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diff --git a/threads.xs b/threads.xs
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index 4e9e31f..3da9165 100644
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--- a/threads.xs
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+++ b/threads.xs
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@@ -580,6 +580,8 @@ S_ithread_run(void * arg)
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S_set_sigmask(&thread->initial_sigmask);
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#endif
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+ thread_locale_init();
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+
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PL_perl_destruct_level = 2;
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{
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@@ -665,6 +667,8 @@ S_ithread_run(void * arg)
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MUTEX_UNLOCK(&thread->mutex);
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MUTEX_UNLOCK(&MY_POOL.create_destruct_mutex);
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+ thread_locale_term();
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+
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/* Exit application if required */
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if (exit_app) {
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(void)S_jmpenv_run(aTHX_ 2, thread, NULL, &exit_app, &exit_code);
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--
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2.14.3
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