Add a select()-based usleep() implementation

[perl/modules/VPIT-TestHelpers.git] / lib / VPIT / TestHelpers.pm

diff --git a/lib/VPIT/TestHelpers.pm b/lib/VPIT/TestHelpers.pm
index 65fc2569ba1c2a70776d4cd99d11bb3327bd1f13..f45da916882cf897002deb734a92cee7bd90abe6 100644 (file)
--- a/lib/VPIT/TestHelpers.pm
+++ b/lib/VPIT/TestHelpers.pm
@@ -718,6 +718,25 @@ sub init_usleep {
     return undef;
    }
   },
+  'select' => sub {
+   if ($Config::Config{d_select}) {
+    diag 'Using select()-based fallback usleep()';
+    return sub {
+     my $s = $_[0];
+     my $r = 0;
+     while ($s > 0) {
+      my ($found, $t) = select(undef, undef, undef, $s / 1e6);
+      last unless defined $t;
+      $t  = int($t * 1e6);
+      $s -= $t;
+      $r += $t;
+     }
+     return $r;
+    };
+   } else {
+    return undef;
+   }
+  },
   'sleep' => sub {
    diag 'Using sleep()-based fallback usleep()';
    return sub {
@@ -728,7 +747,7 @@ sub init_usleep {
   },
  );
 
- @impls = qw<Time::HiRes sleep> unless @impls;
+ @impls = qw<Time::HiRes select sleep> unless @impls;
 
  my $usleep;
  for my $impl (@impls) {