os/ObjectStore: return const refs for oid, cid

Should be a bit faster.

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/os/ObjectStore.h b/src/os/ObjectStore.h
index 9651a697b7872ffb0c68777c4845bf7959cea52f..f33e9985f71c314f4084ca483e393e7c3f9da6a4 100644 (file)
--- a/src/os/ObjectStore.h
+++ b/src/os/ObjectStore.h
@@ -838,11 +838,11 @@ public:
         ::decode(keys, data_bl_p);
       }
 
-      ghobject_t get_oid(__le32 oid_id) {
+      const ghobject_t &get_oid(__le32 oid_id) {
         assert(oid_id < objects.size());
         return objects[oid_id];
       }
-      coll_t get_cid(__le32 cid_id) {
+      const coll_t &get_cid(__le32 cid_id) {
         assert(cid_id < colls.size());
         return colls[cid_id];
       }