UI: ServiceManager: Simplify processControlState()

src/ui/manager/servicemanager.cpp

@@ -1,6 +1,7 @@
 #include "servicemanager.h"
 
 #include <QCoreApplication>
+#include <QHash>
 #include <QLoggingCategory>
 
 #define WIN32_LEAN_AND_MEAN
@@ -20,6 +21,101 @@ namespace {
 
 const QLoggingCategory LC("manager.service");
 
+quint32 processControlPauseState(
+        ServiceManager *serviceManager, quint32 /*code*/, quint32 /*eventType*/)
+{
+    if (!serviceManager->acceptPauseContinue())
+        return 0;
+
+    qCDebug(LC) << "Pause due service control";
+
+    emit serviceManager->pauseRequested();
+
+    return SERVICE_PAUSED;
+}
+
+quint32 processControlContinueState(
+        ServiceManager *serviceManager, quint32 /*code*/, quint32 /*eventType*/)
+{
+    if (!serviceManager->acceptPauseContinue())
+        return 0;
+
+    qCDebug(LC) << "Continue due service control";
+
+    emit serviceManager->continueRequested();
+
+    return SERVICE_RUNNING;
+}
+
+quint32 processControlStopState(
+        ServiceManager *serviceManager, quint32 /*code*/, quint32 /*eventType*/)
+{
+    return serviceManager->acceptStop() ? SERVICE_STOP_PENDING : 0;
+}
+
+quint32 processControlShutdownState(
+        ServiceManager *serviceManager, quint32 code, quint32 /*eventType*/)
+{
+    const bool restarting = (code == ServiceControlStopRestarting);
+    if (restarting || code == ServiceControlStopUninstall) {
+        emit serviceManager->stopRestartingRequested(restarting);
+    }
+
+    return SERVICE_STOP_PENDING;
+}
+
+quint32 processControlDeviceEvent(
+        ServiceManager *serviceManager, quint32 /*code*/, quint32 eventType)
+{
+    if (ServiceManagerIface::isDeviceEvent(eventType)) {
+        emit serviceManager->driveListChanged();
+    }
+
+    return 0;
+}
+
+enum ServiceControlHandlerCode : qint8 {
+    ControlHandlerNone = -1,
+    ControlHandlerPause = 0,
+    ControlHandlerContinue,
+    ControlHandlerStop,
+    ControlHandlerShutdown,
+    ControlHandlerDeviceEvent,
+};
+
+static const QHash<quint8, ServiceControlHandlerCode> g_controlHandlerCodes = {
+    { SERVICE_CONTROL_PAUSE, ControlHandlerPause },
+    { SERVICE_CONTROL_CONTINUE, ControlHandlerContinue },
+    { SERVICE_CONTROL_STOP, ControlHandlerStop },
+    { ServiceControlStop, ControlHandlerShutdown },
+    { ServiceControlStopRestarting, ControlHandlerShutdown },
+    { ServiceControlStopUninstall, ControlHandlerShutdown },
+    { SERVICE_CONTROL_SHUTDOWN, ControlHandlerShutdown },
+    { SERVICE_CONTROL_DEVICEEVENT, ControlHandlerDeviceEvent },
+};
+
+using controlHandler_func = quint32 (*)(
+        ServiceManager *serviceManager, quint32 code, quint32 eventType);
+
+static const controlHandler_func controlHandler_funcList[] = {
+    &processControlPauseState, // ControlHandlerPause,
+    &processControlContinueState, // ControlHandlerContinue,
+    &processControlStopState, // ControlHandlerStop,
+    &processControlShutdownState, // ControlHandlerShutdown,
+    &processControlDeviceEvent, // ControlHandlerDeviceEvent,
+};
+
+inline quint32 processControlState(ServiceManager *serviceManager, quint32 code, quint32 eventType)
+{
+    const auto handlerCode = g_controlHandlerCodes.value(code, ControlHandlerNone);
+    if (handlerCode == ControlHandlerNone)
+        return 0;
+
+    const controlHandler_func func = controlHandler_funcList[handlerCode];
+
+    return func(serviceManager, code, eventType);
+}
+
 }
 
 ServiceManager::ServiceManager(QObject *parent) : QObject(parent) { }
@@ -85,7 +181,7 @@ const wchar_t *ServiceManager::serviceName() const
 
 void ServiceManager::processControl(quint32 code, quint32 eventType)
 {
-    const auto state = processControlState(code, eventType);
+    const auto state = processControlState(this, code, eventType);
 
     if (state == SERVICE_STOP_PENDING) {
         OsUtil::quit("service control"); // it's threadsafe
@@ -94,82 +190,6 @@ void ServiceManager::processControl(quint32 code, quint32 eventType)
     reportStatus(state);
 }
 
-quint32 ServiceManager::processControlState(quint32 code, quint32 eventType)
-{
-    switch (code) {
-    case SERVICE_CONTROL_PAUSE: {
-        return processControlPauseState();
-    } break;
-
-    case SERVICE_CONTROL_CONTINUE: {
-        return processControlContinueState();
-    } break;
-
-    case SERVICE_CONTROL_STOP: {
-        return processControlStopState();
-    } break;
-
-    case ServiceControlStop:
-    case ServiceControlStopRestarting:
-    case ServiceControlStopUninstall:
-    case SERVICE_CONTROL_SHUTDOWN: {
-        return processControlShutdownState(code);
-    } break;
-
-    case SERVICE_CONTROL_DEVICEEVENT: {
-        processControlDeviceEvent(eventType);
-    } break;
-    }
-
-    return 0;
-}
-
-quint32 ServiceManager::processControlPauseState()
-{
-    if (!acceptPauseContinue())
-        return 0;
-
-    qCDebug(LC) << "Pause due service control";
-
-    emit pauseRequested();
-
-    return SERVICE_PAUSED;
-}
-
-quint32 ServiceManager::processControlContinueState()
-{
-    if (!acceptPauseContinue())
-        return 0;
-
-    qCDebug(LC) << "Continue due service control";
-
-    emit continueRequested();
-
-    return SERVICE_RUNNING;
-}
-
-quint32 ServiceManager::processControlStopState()
-{
-    return acceptStop() ? SERVICE_STOP_PENDING : 0;
-}
-
-quint32 ServiceManager::processControlShutdownState(quint32 code)
-{
-    const bool restarting = (code == ServiceControlStopRestarting);
-    if (restarting || code == ServiceControlStopUninstall) {
-        emit stopRestartingRequested(restarting);
-    }
-
-    return SERVICE_STOP_PENDING;
-}
-
-void ServiceManager::processControlDeviceEvent(quint32 eventType)
-{
-    if (isDeviceEvent(eventType)) {
-        emit driveListChanged();
-    }
-}
-
 void ServiceManager::restart()
 {
     connect(qApp, &QObject::destroyed, [] { OsUtil::startService(APP_BASE "Svc"); });

src/ui/manager/servicemanager.h

@@ -23,6 +23,9 @@ public:
     bool controlEnabled() const { return m_controlEnabled; }
     void setControlEnabled(bool v);
 
+    bool acceptStop() const override { return controlEnabled(); }
+    bool acceptPauseContinue() const override { return controlEnabled(); }
+
     void initialize(qintptr hstatus) override;
 
     const wchar_t *serviceName() const override;
@@ -41,19 +44,9 @@ protected:
     void setupControlManager();
     void setupConfManager();
 
-    bool acceptStop() const override { return controlEnabled(); }
-    bool acceptPauseContinue() const override { return controlEnabled(); }
-
 private:
     void setupByConf(const IniOptions &ini);
 
-    quint32 processControlState(quint32 code, quint32 eventType);
-    quint32 processControlPauseState();
-    quint32 processControlContinueState();
-    quint32 processControlStopState();
-    quint32 processControlShutdownState(quint32 code);
-    void processControlDeviceEvent(quint32 eventType);
-
 private:
     bool m_controlEnabled = false;
 };

src/ui/util/service/servicemanageriface.h

@@ -9,6 +9,9 @@ public:
     ServiceManagerIface() = default;
     virtual ~ServiceManagerIface() = default;
 
+    virtual bool acceptStop() const { return true; }
+    virtual bool acceptPauseContinue() const { return true; }
+
     virtual void initialize(qintptr hstatus);
 
     void registerDeviceNotification();
@@ -18,15 +21,12 @@ public:
 
     virtual void processControl(quint32 code, quint32 eventType) = 0;
 
-protected:
+    static bool isDeviceEvent(quint32 eventType);
-    virtual bool acceptStop() const { return true; }
-    virtual bool acceptPauseContinue() const { return true; }
 
+protected:
     void setupAcceptedControls();
 
     static void reportStatus(quint32 code = 0);
-
-    static bool isDeviceEvent(quint32 eventType);
 };
 
 #endif // SERVICEMANAGERIFACE_H