xref: /openbsd/gnu/usr.bin/perl/t/io/shm.t (revision 91f110e0) 
1################################################################################
2#
3#  $Revision: 6 $
4#  $Author: mhx $
5#  $Date: 2010/03/07 16:01:42 +0100 $
6#
7################################################################################
8#
9#  Version 2.x, Copyright (C) 2007-2010, Marcus Holland-Moritz <mhx@cpan.org>.
10#  Version 1.x, Copyright (C) 1999, Graham Barr <gbarr@pobox.com>.
11#
12#  This program is free software; you can redistribute it and/or
13#  modify it under the same terms as Perl itself.
14#
15################################################################################
16
17BEGIN {
18  if ($ENV{'PERL_CORE'}) {
19    chdir 't' if -d 't';
20    @INC = '../lib' if -d '../lib' && -d '../ext';
21  }
22
23  require "./test.pl";
24  require Config; import Config;
25
26  if ($ENV{'PERL_CORE'} && $Config{'extensions'} !~ m[\bIPC/SysV\b]) {
27    skip_all('-- IPC::SysV was not built');
28  }
29  skip_all_if_miniperl();
30  if ($Config{'d_shm'} ne 'define') {
31    skip_all('-- $Config{d_shm} undefined');
32  }
33}
34
35
36use sigtrap qw/die normal-signals error-signals/;
37use IPC::SysV qw/ IPC_PRIVATE S_IRWXU IPC_RMID /;
38
39my $key;
40END { shmctl $key, IPC_RMID, 0 if defined $key }
41
42{
43	local $SIG{SYS} = sub { plan(skip_all => "SIGSYS caught") } if exists $SIG{SYS};
44	$key = shmget IPC_PRIVATE, 8, S_IRWXU;
45}
46
47if (not defined $key) {
48  my $info = "IPC::SharedMem->new failed: $!";
49  if ($! == &IPC::SysV::ENOSPC || $! == &IPC::SysV::ENOSYS ||
50      $! == &IPC::SysV::ENOMEM || $! == &IPC::SysV::EACCES) {
51    plan(skip_all => $info);
52  }
53  else {
54    die $info;
55  }
56}
57else {
58	plan(tests => 15);
59	pass('acquired shared mem');
60}
61
62ok(shmwrite($key, pack("N", 4711), 0, 4), 'write(offs=0)');
63ok(shmwrite($key, pack("N", 210577), 4, 4), 'write(offs=4)');
64
65my $var;
66ok(shmread($key, $var, 0, 4), 'read(offs=0) returned ok');
67is($var, pack("N", 4711), 'read(offs=0) correct');
68ok(shmread($key, $var, 4, 4), 'read(offs=4) returned ok');
69is($var, pack("N", 210577), 'read(offs=4) correct');
70
71ok(shmwrite($key, "Shared", 1, 6), 'write(offs=1)');
72
73ok(shmread($key, $var, 1, 6), 'read(offs=1) returned ok');
74is($var, 'Shared', 'read(offs=1) correct');
75ok(shmwrite($key,"Memory", 0, 6), 'write(offs=0)');
76
77my $number = 1;
78my $int = 2;
79shmwrite $key, $int, 0, 1;
80shmread $key, $number, 0, 1;
81is("$number", $int, qq{"\$id" eq "$int"});
82cmp_ok($number + 0, '==', $int, "\$id + 0 == $int");
83
84my ($fetch, $store) = (0, 0);
85{ package Counted;
86  sub TIESCALAR { bless [undef] }
87  sub FETCH     { ++$fetch; $_[0][0] }
88  sub STORE     { ++$store; $_[0][0] = $_[1] } }
89tie $ct, 'Counted';
90shmread $key, $ct, 0, 1;
91is($fetch, 1, "shmread FETCH once");
92is($store, 1, "shmread STORE once");
93