Add threadpool::invalidate function

include/rexy/threadpool.hpp

@@ -39,6 +39,8 @@ namespace rexy{
 		threadpool& operator=(const threadpool&) = delete;
 		threadpool& operator=(threadpool&&) = delete;
 
+		void invalidate(void);
+
 		template<class Func, class... Args>
 		auto add_job(Func&& f, Args&&... args) -> std::future<decltype(std::forward<Func>(f)(std::forward<Args>(args)...))>;
 

src/threadpool.cpp

@@ -48,12 +48,16 @@ namespace rexy{
 		m_ctor_lock.unlock();
 	}
 	threadpool::~threadpool(void){
-		m_valid = false;
+		invalidate();
-		//wakeup all workers and end them
-		m_qcv.notify_all();
 		for(auto& thread : m_workers){
 			thread.join();
 		}
 	}
 
+	void threadpool::invalidate(void){
+		m_valid = false;
+		//wakeup all workers and end them
+		m_qcv.notify_all();
+	}
+
 }