validate close in waiter

src/libipc/waiter.h

@@ -42,8 +42,8 @@ public:
     }
 
     void close() noexcept {
-        // cond_.close();
+        cond_.close();
-        // lock_.close();
+        lock_.close();
     }
 
     template <typename F>
@@ -64,6 +64,9 @@ public:
         std::lock_guard<ipc::sync::mutex>{lock_}; // barrier
         return cond_.broadcast();
     }
+
+    void quit_waiting() {
+    }
 };
 
 } // namespace detail

test/test_waiter.cpp

@@ -34,4 +34,7 @@ TEST(Waiter, broadcast) {
     }
 }
 
+TEST(Waiter, quit_waiting) {
+}
+
 } // internal-linkage