Add usleep feature

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

diff --git a/lib/VPIT/TestHelpers.pm b/lib/VPIT/TestHelpers.pm
index f44807421a4b03fe69c5a093904945ff3b7a126e..68f11f0092e8b89cee24aa1e8bcb1473d39c79b9 100644 (file)
--- a/lib/VPIT/TestHelpers.pm
+++ b/lib/VPIT/TestHelpers.pm
@@ -23,7 +23,9 @@ my %default_exports = (
  skip_all         => \&skip_all,
 );
 
-my %features = ();
+my %features = (
+ usleep => \&init_usleep,
+);
 
 sub import {
  shift;
@@ -153,6 +155,24 @@ sub run_perl {
  system { $^X } $^X, '-T', map("-I$_", @INC), '-e', $code;
 }
 
+sub init_usleep {
+ my $usleep;
+
+ if (do { local $@; eval { require Time::HiRes; 1 } }) {
+  defined and diag "Using usleep() from Time::HiRes $_"
+                                                      for $Time::HiRes::VERSION;
+  $usleep = \&Time::HiRes::usleep;
+ } else {
+  diag 'Using fallback usleep()';
+  $usleep = sub {
+   my $s = int($_[0] / 2.5e5);
+   sleep $s if $s;
+  };
+ }
+
+ return usleep => $usleep;
+}
+
 package VPIT::TestHelpers::Guard;
 
 sub new {