refactor

repertory/librepertory/src/utils/tasks.cpp

@@ -100,15 +100,16 @@ void tasks::stop() {
   stop_requested_ = true;
 
   unique_mutex_lock lock(mutex_);
+  std::vector<std::unique_ptr<std::jthread>> threads;
+  std::swap(threads, task_threads_);
+
+  std::deque<scheduled_task> tasks;
+  std::swap(tasks, tasks_);
   notify_.notify_all();
   lock.unlock();
 
-  task_threads_.clear();
+  threads.clear();
-
+  tasks.clear();
-  lock.lock();
-  tasks_.clear();
-  notify_.notify_all();
-  lock.unlock();
 }
 
 void tasks::task_thread() {