include/encoding: featureful encoder for list of shared_ptrs

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

diff --git a/src/include/encoding.h b/src/include/encoding.h
index a5a93a0996b7cbe8dca845999ca4266ceef9e8ed..7de74544b2cc45422bee052a42f9e767a7243e14 100644 (file)
--- a/src/include/encoding.h
+++ b/src/include/encoding.h
@@ -423,6 +423,28 @@ inline void encode(const std::list<ceph::shared_ptr<T> >& ls, bufferlist& bl)
   }
 }
 template<class T>
+inline void encode(const std::list<ceph::shared_ptr<T> >& ls, bufferlist& bl, uint64_t features)
+{
+  // should i pre- or post- count?
+  if (!ls.empty()) {
+    unsigned pos = bl.length();
+    unsigned n = 0;
+    encode(n, bl);
+    for (typename std::list<ceph::shared_ptr<T> >::const_iterator p = ls.begin(); p != ls.end(); ++p) {
+      n++;
+      encode(**p, bl, features);
+    }
+    ceph_le32 en;
+    en = n;
+    bl.copy_in(pos, sizeof(en), (char*)&en);
+  } else {
+    __u32 n = (__u32)(ls.size());    // FIXME: this is slow on a list.
+    encode(n, bl);
+    for (typename std::list<ceph::shared_ptr<T> >::const_iterator p = ls.begin(); p != ls.end(); ++p)
+      encode(**p, bl, features);
+  }
+}
+template<class T>
 inline void decode(std::list<ceph::shared_ptr<T> >& ls, bufferlist::iterator& p)
 {
   __u32 n;