refactor: allow exit event to provide an exit code

src/lib/base/Event.h

@@ -21,6 +21,20 @@ public:
   virtual ~EventData() = default;
 };
 
+class ExitEventData : public EventData
+{
+public:
+  ExitEventData(int exitCode) : m_exitCode(exitCode) {};
+  virtual ~ExitEventData() = default;
+  int exitCode()
+  {
+    return m_exitCode;
+  }
+
+private:
+  int m_exitCode;
+};
+
 //! Event
 /*!
  \c Event holds an event type and a pointer to event data. It is movable, but not copyable
@@ -77,7 +91,6 @@ public:
     switch (event.getType()) {
       using enum EventTypes;
     case Unknown:
-    case Quit:
     case System:
     case Timer:
       break;

src/lib/base/EventQueue.cpp

@@ -12,6 +12,7 @@
 #include "base/EventQueueTimer.h"
 #include "base/Log.h"
 #include "base/SimpleEventQueueBuffer.h"
+#include "common/ExitCodes.h"
 #include "mt/Lock.h"
 #include "mt/Mutex.h"
 
@@ -44,7 +45,7 @@ EventQueue::~EventQueue()
   ARCH->setSignalHandler(Arch::ThreadSignal::Terminate, nullptr, nullptr);
 }
 
-void EventQueue::loop()
+int EventQueue::loop()
 {
   m_buffer->init();
   {
@@ -67,6 +68,12 @@ void EventQueue::loop()
     Event::deleteData(event);
     getEvent(event);
   }
+  int exitCode = s_exitSuccess;
+  auto *exitEvent = dynamic_cast<ExitEventData *>(event.getDataObject());
+  if (exitEvent != nullptr) {
+    exitCode = exitEvent->exitCode();
+  }
+  return exitCode;
 }
 
 void EventQueue::adoptBuffer(IEventQueueBuffer *buffer)

src/lib/base/EventQueue.h

@@ -35,7 +35,7 @@ public:
   EventQueue &operator=(EventQueue &&) = delete;
 
   // IEventQueue overrides
-  void loop() override;
+  int loop() override;
   void adoptBuffer(IEventQueueBuffer *) override;
   bool getEvent(Event &event, double timeout = -1.0) override;
   bool dispatchEvent(const Event &event) override;

src/lib/base/IEventQueue.h

@@ -45,7 +45,7 @@ public:
   /*!
   Dequeues and dispatches events until the kQuit event is found.
   */
-  virtual void loop() = 0;
+  virtual int loop() = 0;
 
   //! Set the buffer
   /*!

src/lib/deskflow/App.cpp

@@ -12,9 +12,9 @@
 #include "base/Log.h"
 #include "base/LogOutputters.h"
 #include "common/ExitCodes.h"
-#include "common/PlatformInfo.h"
 #include "common/Settings.h"
 #include "deskflow/DeskflowException.h"
+#include "mt/ThreadException.h"
 
 #if defined(Q_OS_WIN)
 #include "base/IEventQueue.h"
@@ -170,5 +170,8 @@ void App::handleScreenError() const
 
 void App::runEventsLoop(const void *)
 {
-  m_events->loop();
+  int exitCode = m_events->loop();
+  if (exitCode != s_exitSuccess) {
+    throw ThreadExitException(new LoopErrorCode(exitCode));
+  }
 }

src/lib/deskflow/App.h

@@ -121,6 +121,14 @@ public:
 protected:
   void runEventsLoop(const void *);
 
+  struct LoopErrorCode
+  {
+    int m_errorCode;
+    LoopErrorCode(int errorCode) : m_errorCode(errorCode)
+    {
+    }
+  };
+
 private:
   void (*m_bye)(int);
   IEventQueue *m_events = nullptr;

src/lib/deskflow/ClientApp.cpp

@@ -327,15 +327,14 @@ int ClientApp::mainLoop()
   // run event loop.  if startClient() failed we're supposed to retry
   // later.  the timer installed by startClient() will take care of
   // that.
-
-  getEvents()->loop();
+  int exitCode = getEvents()->loop();
 
   // close down
   LOG_DEBUG("stopping client");
   stopClient();
   LOG_NOTE("stopped client");
 
-  return s_exitSuccess;
+  return exitCode;
 }
 
 int ClientApp::start()

src/lib/deskflow/ServerApp.cpp

@@ -539,8 +539,7 @@ int ServerApp::mainLoop()
   // run event loop.  if startServer() failed we're supposed to retry
   // later.  the timer installed by startServer() will take care of
   // that.
-
-  getEvents()->loop();
+  int exitCode = getEvents()->loop();
 
   // close down
   LOG_DEBUG("stopping server");
@@ -549,7 +548,7 @@ int ServerApp::mainLoop()
   cleanupServer();
   LOG_NOTE("stopped server");
 
-  return s_exitSuccess;
+  return exitCode;
 }
 
 void ServerApp::resetServer()

src/unittests/deskflow/MockEventQueue.h

@@ -8,6 +8,7 @@
 #pragma once
 
 #include "base/IEventQueue.h"
+#include "common/ExitCodes.h"
 
 class MockEventQueue : public IEventQueue
 {
@@ -27,9 +28,9 @@ public:
     return true;
   }
 
-  void loop() override
+  int loop() override
   {
-    // do nothing
+    return s_exitSuccess;
   }
 
   void adoptBuffer(IEventQueueBuffer *) override

src/unittests/legacytests/mock/deskflow/MockEventQueue.h

@@ -14,7 +14,7 @@
 class MockEventQueue : public IEventQueue
 {
 public:
-  MOCK_METHOD(void, loop, (), (override));
+  MOCK_METHOD(int, loop, (), (override));
   MOCK_METHOD(EventQueueTimer *, newOneShotTimer, (double, void *), (override));
   MOCK_METHOD(EventQueueTimer *, newTimer, (double, void *), (override));
   MOCK_METHOD(bool, getEvent, (Event &, double), (override));