- methods to expand tilda in file pathes + methods to control thread pool

src/engine/helper/HL_ThreadPool.h

@@ -18,11 +18,12 @@ class thread_pool
 public:
     typedef std::function<void()> task;
 
-    thread_pool(size_t num_of_threads, const std::string&);
+    thread_pool(size_t num_of_threads, const std::string& thread_name);
     ~thread_pool();
 
     void enqueue(const task& task);
-
+    void wait(std::chrono::milliseconds interval = std::chrono::milliseconds(50));
+    size_t size();
 private:
     // need to keep track of threads so we can join them
     std::vector< std::thread > workers;
@@ -33,7 +34,7 @@ private:
     // synchronization
     std::mutex queue_mutex;
     std::condition_variable condition;
-    bool stop = false;
+    std::atomic_bool stop = false;
 
     // thread name prefix for worker threads
     std::string name;