6 @INC = ('.', '../lib');
7 $hires = eval 'use Time::HiResx "time"; 1';
15 eval {select undef, $blank, $blank, 0};
16 is ($@, "", 'select undef $blank $blank 0');
17 eval {select $blank, undef, $blank, 0};
18 is ($@, "", 'select $blank undef $blank 0');
19 eval {select $blank, $blank, undef, 0};
20 is ($@, "", 'select $blank $blank undef 0');
22 eval {select "", $blank, $blank, 0};
23 is ($@, "", 'select "" $blank $blank 0');
24 eval {select $blank, "", $blank, 0};
25 is ($@, "", 'select $blank "" $blank 0');
26 eval {select $blank, $blank, "", 0};
27 is ($@, "", 'select $blank $blank "" 0');
29 eval {select "a", $blank, $blank, 0};
30 like ($@, qr/^Modification of a read-only value attempted/,
31 'select "a" $blank $blank 0');
32 eval {select $blank, "a", $blank, 0};
33 like ($@, qr/^Modification of a read-only value attempted/,
34 'select $blank "a" $blank 0');
35 eval {select $blank, $blank, "a", 0};
36 like ($@, qr/^Modification of a read-only value attempted/,
37 'select $blank $blank "a" 0');
40 # Actual sleep time on Windows may be rounded down to an integral
41 # multiple of the system clock tick interval. Clock tick interval
42 # is configurable, but usually about 15.625 milliseconds.
43 # time() however (if we haven;t loaded Time::HiRes), doesn't return
44 # fractional values, so the observed delay may be 1 second short.
46 # There is also a report that old linux kernels may return 0.5ms early:
47 # <20110520081714.GC17549@mars.tony.develop-help.com>.
50 my $under = $hires ? 0.1 : 1;
53 select(undef, undef, undef, $sleep);
56 ok($diff >= $sleep-$under, "select(u,u,u,\$sleep): at least $sleep seconds have passed");
57 note("diff=$diff under=$under");
62 select($empty, undef, undef, $sleep);
65 ok($diff >= $sleep-$under, "select(\$e,u,u,\$sleep): at least $sleep seconds have passed");
66 note("diff=$diff under=$under");