1#!perl -w
2
3# Tests if $$ and getppid return consistent values across threads
4
5BEGIN {
6    chdir 't' if -d 't';
7    require './test.pl';
8    set_up_inc( qw(../lib) );
9    skip_all_if_miniperl(
10	"no dynamic loading on miniperl, no threads/attributes"
11    );
12}
13
14use strict;
15use Config;
16
17{
18    skip_all_without_config(qw(useithreads d_getppid));
19    eval 'use threads; use threads::shared';
20    plan tests => 3;
21    if ($@) {
22	fail("unable to load thread modules");
23    }
24    else {
25	pass("thread modules loaded");
26    }
27}
28
29my ($pid, $ppid) = ($$, getppid());
30my $pid2 : shared = 0;
31my $ppid2 : shared = 0;
32
33new threads( sub { ($pid2, $ppid2) = ($$, getppid()); } ) -> join();
34
35# If this breaks you're either running under LinuxThreads (and we
36# haven't detected it) or your system doesn't have POSIX thread
37# semantics.
38# Newer linuxthreads from gnukfreebsd (0.11) does have POSIX thread
39# semantics, so include a version check
40# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=675606>
41my $thread_version = qx[getconf GNU_LIBPTHREAD_VERSION 2>&1] // '';
42chomp $thread_version;
43if ($^O =~ /^(?:gnukfreebsd|linux)$/ and
44    $thread_version =~ /linuxthreads/ and
45    !($thread_version =~ /linuxthreads-(.*)/ && $1 >= 0.11)) {
46    diag "We're running under $^O with linuxthreads <$thread_version>";
47    isnt($pid,  $pid2, "getpid() in a thread is different from the parent on this non-POSIX system");
48    isnt($ppid, $ppid2, "getppid() in a thread is different from the parent on this non-POSIX system");
49} else {
50    is($pid,  $pid2, 'getpid() in a thread is the same as in the parent');
51    is($ppid, $ppid2, 'getppid() in a thread is the same as in the parent');
52}
53