Use std::unique_ptr for StreamPieceSelector instead of std::shared_ptr

src/DefaultPieceStorage.cc

@@ -89,11 +89,14 @@ DefaultPieceStorage::DefaultPieceStorage
   const std::string& pieceSelectorOpt =
     option_->get(PREF_STREAM_PIECE_SELECTOR);
   if(pieceSelectorOpt.empty() || pieceSelectorOpt == A2_V_DEFAULT) {
-    streamPieceSelector_.reset(new DefaultStreamPieceSelector(bitfieldMan_));
+    streamPieceSelector_ = make_unique<DefaultStreamPieceSelector>
+      (bitfieldMan_);
   } else if(pieceSelectorOpt == V_INORDER) {
-    streamPieceSelector_.reset(new InorderStreamPieceSelector(bitfieldMan_));
+    streamPieceSelector_ = make_unique<InorderStreamPieceSelector>
+      (bitfieldMan_);
   } else if(pieceSelectorOpt == A2_V_GEOM) {
-    streamPieceSelector_.reset(new GeomStreamPieceSelector(bitfieldMan_, 1.5));
+    streamPieceSelector_ = make_unique<GeomStreamPieceSelector>
+      (bitfieldMan_, 1.5);
   }
 }
 

src/DefaultPieceStorage.h

@@ -91,7 +91,7 @@ private:
   std::shared_ptr<PieceStatMan> pieceStatMan_;
 
   std::unique_ptr<PieceSelector> pieceSelector_;
-  std::shared_ptr<StreamPieceSelector> streamPieceSelector_;
+  std::unique_ptr<StreamPieceSelector> streamPieceSelector_;
 
   WrDiskCache* wrDiskCache_;
 #ifdef ENABLE_BITTORRENT