Add Application::isStandalone() method

dgl/Application.hpp

@@ -75,6 +75,12 @@ public:
     */
     bool isQuiting() const noexcept;
 
+   /**
+      Check if the application is standalone, otherwise running as a module or plugin.
+      This function is thread-safe.
+    */
+    bool isStandalone() const noexcept;
+
    /**
       Add a callback function to be triggered on every idle cycle.
       You can add more than one, and remove them at anytime with removeIdleCallback().

dgl/src/Application.cpp

@@ -53,6 +53,11 @@ bool Application::isQuiting() const noexcept
     return pData->isQuitting || pData->isQuittingInNextCycle;
 }
 
+bool Application::isStandalone() const noexcept
+{
+    return pData->isStandalone;
+}
+
 void Application::addIdleCallback(IdleCallback* const callback)
 {
     DISTRHO_SAFE_ASSERT_RETURN(callback != nullptr,)