5 eval "use Time::HiRes qw($symbol)";
6 return 0 unless $@ eq '';
7 eval "my \$a = $symbol";
15 unless(defined &Time::HiRes::setitimer
16 && defined &Time::HiRes::getitimer
17 && has_symbol('ITIMER_VIRTUAL')
18 && $Config{sig_name} =~ m/\bVTALRM\b/
19 && $^O ne 'nto' # nto: QNX 6 has the API but no implementation
20 && $^O ne 'haiku' # haiku: has the API but no implementation
21 && $^O ne 'gnu' # GNU/Hurd: has the API but no implementation
24 Test::More::plan(skip_all => "no itimer");
28 use Test::More tests => 2;
29 BEGIN { push @INC, '.' }
32 my $limit = 0.25; # 25% is acceptable slosh for testing timers
35 my $r = [Time::HiRes::gettimeofday()];
38 $i ? $i-- : Time::HiRes::setitimer(&Time::HiRes::ITIMER_VIRTUAL, 0);
39 printf("# Tick! $i %s\n", Time::HiRes::tv_interval($r));
42 printf("# setitimer: %s\n", join(" ",
43 Time::HiRes::setitimer(&Time::HiRes::ITIMER_VIRTUAL, 0.5, 0.4)));
45 # Assume interval timer granularity of $limit * 0.5 seconds. Too bold?
46 my $virt = Time::HiRes::getitimer(&Time::HiRes::ITIMER_VIRTUAL);
47 ok(defined $virt && abs($virt / 0.5) - 1 < $limit,
48 "ITIMER_VIRTUAL defined with sufficient granularity")
49 or diag "virt=" . (defined $virt ? $virt : 'undef');
51 printf("# getitimer: %s\n", join(" ",
52 Time::HiRes::getitimer(&Time::HiRes::ITIMER_VIRTUAL)));
54 while (Time::HiRes::getitimer(&Time::HiRes::ITIMER_VIRTUAL)) {
56 for (1..1000) { $j++ } # Can't be unbreakable, must test getitimer().
59 printf("# getitimer: %s\n", join(" ",
60 Time::HiRes::getitimer(&Time::HiRes::ITIMER_VIRTUAL)));
62 $virt = Time::HiRes::getitimer(&Time::HiRes::ITIMER_VIRTUAL);
63 print("# at end, i=$i\n");
64 is($virt, 0, "time left should be zero");
66 $SIG{VTALRM} = 'DEFAULT';