use POSIX qw(strftime);
use Scalar::Util qw(weaken);
+our @EXPORT_OK = qw(safe_string_ne safe_boolean_ne safe_num_ne typesafe_ne);
+
# We use a separate lock to block migration while a replication job
# is running.
our $lockdir = '/var/lock/pve-manager';
+# safe variable comparison functions
+
+sub safe_num_ne {
+ my ($a, $b) = @_;
+
+ return 0 if !defined($a) && !defined($b);
+ return 1 if !defined($a);
+ return 1 if !defined($b);
+
+ return $a != $b;
+}
+
+sub safe_string_ne {
+ my ($a, $b) = @_;
+
+ return 0 if !defined($a) && !defined($b);
+ return 1 if !defined($a);
+ return 1 if !defined($b);
+
+ return $a ne $b;
+}
+
+sub safe_boolean_ne {
+ my ($a, $b) = @_;
+
+ # we don't check if value is defined, since undefined
+ # is false (so it's a valid boolean)
+
+ # negate both values to normalize and compare
+ return !$a != !$b;
+}
+
+sub typesafe_ne {
+ my ($a, $b, $type) = @_;
+
+ return 0 if !defined($a) && !defined($b);
+ return 1 if !defined($a);
+ return 1 if !defined($b);
+
+ if ($type eq 'string') {
+ return safe_string_ne($a, $b);
+ } elsif ($type eq 'number' || $type eq 'integer') {
+ return safe_num_ne($a, $b);
+ } elsif ($type eq 'boolean') {
+ return safe_boolean_ne($a, $b);
+ }
+
+ die "internal error: can't compare $a and $b with type $type";
+}
+
+
sub guest_migration_lock {
my ($vmid, $timeout, $func, @param) = @_;