Add destructor

workers.hpp

+/*
+ * Copyright (C) 2021  Joakim Skogø Langvand
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef __WORKERS_HPP__
 #define __WORKERS_HPP__
 
@@ -32,9 +49,12 @@ namespace jlworkers {
 
     std::thread m_runnerThread;
 
+    void stop();
+
   public:
     Workers();
     Workers(int numThreads);
+    ~Workers() { if (m_running) join(); }
 
     void post(const std::function<void ()>&);
     void post_timeout(const std::function<void ()>&, int timeout);