osd/ClassHandler: only dlclose() the classes not missing

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/src/osd/ClassHandler.cc b/src/osd/ClassHandler.cc
index 87d5a75a30122b16b14e5edc2c251c1d16bf6a11..5b39f96a569d2fea0b12d00cc7c4714912cd70d4 100644 (file)
--- a/src/osd/ClassHandler.cc
+++ b/src/osd/ClassHandler.cc
@@ -72,8 +72,10 @@ int ClassHandler::open_all_classes()
 
 void ClassHandler::shutdown()
 {
-  for (map<string, ClassData>::iterator p = classes.begin(); p != classes.end(); ++p) {
-    dlclose(p->second.handle);
+  for (auto& cls : classes) {
+    if (cls.second.handle) {
+      dlclose(cls.second.handle);
+    }
   }
   classes.clear();
 }