add closure queue

src/App.cpp

@@ -41,6 +41,7 @@ void App::run() {
         for(auto it = modules.begin(); it != modules.end(); it++) {
             (*it)->run();
         }
+        closeModules();
     }
     
 }
@@ -76,19 +77,25 @@ void App::load(std::string lib) {
 }
         
 void App::unload(decltype(Module::self) it) {
-    void* handle = (*it)->getHandle();
-    std::cout << "retrieved handle\nAttempting to delete module: " << (*it)->getName() << std::endl;
+    toClose.push_back((*it)->getHandle());
+    std::cout << "marked handle for closure\n";
+    std::cout << "Attempting to delete module: " << (*it)->getName() << std::endl;
     Module* m = *it;
     *it = nullptr;    
     modules.erase(it);
     std::cout << "erased iterator\n";
     delete m;
     std::cout << "deleted module\n";
-    dlclose(handle);
-    std::cout << "closed handle\n";
 
 }
 
+void App::closeModules() {
+    for(auto it = toClose.begin(); it != toClose.end(); it++) {
+        dlclose(*it);
+        it = toClose.erase(it);
+    }
+}
+
 void App::handleArgs(const int& argc, char* argv[]) {
 
     int i = 1;