1 files changed, 8 insertions, 0 deletions
diff --git a/src/lib/exvar/exvar.go b/src/lib/exvar/exvar.go
index fea568337..6473f7af6 100644
--- a/src/lib/exvar/exvar.go
+++ b/src/lib/exvar/exvar.go
@@ -128,6 +128,14 @@ func (v *String) Set(value string) {
 	v.s = value;
 }
 
+// IntFunc wraps a func() int64 to create a value that satisfies the Var interface.
+// The function will be called each time the Var is evaluated.
+type IntFunc func() int64;
+
+func (v IntFunc) String() string {
+	return strconv.Itoa64(v())
+}
+
 
 // All published variables.
 var vars map[string] Var = make(map[string] Var);