xref: /openbsd/gnu/usr.bin/perl/cpan/IPC-SysV/t/shm.t (revision 73471bf0) 
1################################################################################
2#
3#  Version 2.x, Copyright (C) 2007-2013, Marcus Holland-Moritz <mhx@cpan.org>.
4#  Version 1.x, Copyright (C) 1999, Graham Barr <gbarr@pobox.com>.
5#
6#  This program is free software; you can redistribute it and/or
7#  modify it under the same terms as Perl itself.
8#
9################################################################################
10
11BEGIN {
12  if ($ENV{'PERL_CORE'}) {
13    chdir 't' if -d 't';
14    @INC = '../lib' if -d '../lib' && -d '../ext';
15  }
16
17  require Test::More; import Test::More;
18  require Config; import Config;
19
20  if ($ENV{'PERL_CORE'} && $Config{'extensions'} !~ m[\bIPC/SysV\b]) {
21    plan(skip_all => 'IPC::SysV was not built');
22  }
23}
24
25if ($Config{'d_shm'} ne 'define') {
26  plan(skip_all => '$Config{d_shm} undefined');
27}
28
29use IPC::SysV qw( IPC_PRIVATE S_IRWXU );
30use IPC::SharedMem;
31
32my $shm = sub {
33  my $code = shift;
34  if (exists $SIG{SYS}) {
35    local $SIG{SYS} = sub { plan(skip_all => "SIGSYS caught") };
36    return $code->();
37  }
38  return $code->();
39}->(sub { IPC::SharedMem->new(IPC_PRIVATE, 8, S_IRWXU) });
40
41unless (defined $shm) {
42  my $info = "IPC::SharedMem->new failed: $!";
43  if ($! == &IPC::SysV::ENOSPC || $! == &IPC::SysV::ENOSYS ||
44      $! == &IPC::SysV::ENOMEM || $! == &IPC::SysV::EACCES) {
45    plan(skip_all => $info);
46  }
47  else {
48    die $info;
49  }
50}
51
52plan(tests => 23);
53
54pass('acquired shared mem');
55
56my $st = $shm->stat;
57
58ok($st, 'stat it');
59is($st->nattch, 0, 'st->nattch');
60is($st->cpid, $$, 'cpid');
61ok($st->segsz >= 8, 'segsz');
62
63ok($shm->write(pack("N", 4711), 0, 4), 'write(offs=0)');
64ok($shm->write(pack("N", 210577), 4, 4), 'write(offs=4)');
65
66is($shm->read(0, 4), pack("N", 4711), 'read(offs=0)');
67is($shm->read(4, 4), pack("N", 210577), 'read(offs=4)');
68
69ok($shm->attach, 'attach');
70
71$st = $shm->stat;
72
73ok($st, 'stat it');
74is($st->nattch, 1, 'st->nattch');
75is($st->cpid, $$, 'lpid');
76
77is($shm->read(0, 4), pack("N", 4711), 'read(offs=0)');
78is($shm->read(4, 4), pack("N", 210577), 'read(offs=4)');
79
80ok($shm->write("Shared", 1, 6), 'write(offs=1)');
81
82ok(!$shm->is_removed, '!is_removed');
83ok($shm->remove, 'remove');
84ok($shm->is_removed, 'is_removed');
85
86is($shm->read(1, 6), 'Shared', 'read(offs=1)');
87ok($shm->write("Memory", 0, 6), 'write(offs=0)');
88is(unpack("P6", $shm->addr), 'Memory', 'read using unpack');
89
90ok($shm->detach, 'detach');
91
92