DeviceManager: Use different Singleton implementation.

The "local static" version frees us of the need to clean up manually at
the end. This, in turn, means the plugin does not need to know the
device manager directly anymore, getting rid of one #include and a
friend declaration.

Change-Id: Ia4a07f80bfd7cd4cdeed90b3b2b04aa73eb1c7cc
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@nokia.com>

src/plugins/projectexplorer/devicesupport/devicemanager.cpp

@@ -71,13 +71,11 @@ const char DefaultDevicesKey[] = "DefaultDevices";
 class DeviceManagerPrivate
 {
 public:
-    static DeviceManager *instance;
     static DeviceManager *clonedInstance;
     QList<IDevice::Ptr> devices;
     QList<IDevice::Ptr> inactiveAutoDetectedDevices;
     QHash<QString, IDevice::Id> defaultDevices;
 };
-DeviceManager *DeviceManagerPrivate::instance = 0;
 DeviceManager *DeviceManagerPrivate::clonedInstance = 0;
 
 } // namespace Internal
@@ -87,17 +85,8 @@ using namespace Internal;
 
 DeviceManager *DeviceManager::instance()
 {
-    if (DeviceManagerPrivate::instance == 0) {
-        DeviceManagerPrivate::instance = new DeviceManager;
-        DeviceManagerPrivate::instance->load();
-    }
-    return DeviceManagerPrivate::instance;
-}
-
-void DeviceManager::deleteInstance()
-{
-    delete Internal::DeviceManagerPrivate::instance;
-    Internal::DeviceManagerPrivate::instance = 0;
+    static DeviceManager deviceManager(true);
+    return &deviceManager;
 }
 
 int DeviceManager::deviceCount() const
@@ -107,13 +96,10 @@ int DeviceManager::deviceCount() const
 
 void DeviceManager::replaceInstance()
 {
-    QTC_ASSERT(DeviceManagerPrivate::instance, return);
-
-    copy(DeviceManagerPrivate::clonedInstance,
-        DeviceManagerPrivate::instance, false);
-    DeviceManagerPrivate::instance->save();
-    emit DeviceManagerPrivate::instance->deviceListChanged();
-    emit DeviceManagerPrivate::instance->updated();
+    copy(DeviceManagerPrivate::clonedInstance, instance(), false);
+    instance()->save();
+    emit instance()->deviceListChanged();
+    emit instance()->updated();
 }
 
 void DeviceManager::removeClonedInstance()
@@ -239,7 +225,7 @@ QString DeviceManager::settingsFilePath()
 
 void DeviceManager::addDevice(const IDevice::Ptr &device)
 {
-    QTC_ASSERT(this != DeviceManagerPrivate::instance || (device->isAutoDetected()), return);
+    QTC_ASSERT(this != instance() || (device->isAutoDetected()), return);
     QTC_ASSERT(!device->isAutoDetected() || !findAutoDetectedDevice(d->devices, device->type(),
             device->fingerprint()), return);
 
@@ -257,9 +243,9 @@ void DeviceManager::addDevice(const IDevice::Ptr &device)
     if (!defaultDevice(device->type()))
         d->defaultDevices.insert(device->type(), device->internalId());
     d->devices << device;
-    if (this == d->instance && d->clonedInstance)
+    if (this == instance() && d->clonedInstance)
         d->clonedInstance->addDevice(device->clone());
-    if (this == d->instance) {
+    if (this == instance()) {
         QList<IDevice::Ptr>::Iterator it = d->inactiveAutoDetectedDevices.begin();
         while (it != d->inactiveAutoDetectedDevices.end()) {
             if (it->data()->type() == device->type()
@@ -279,7 +265,7 @@ void DeviceManager::removeDevice(int idx)
 {
     const IDevice::Ptr device = mutableDeviceAt(idx);
     QTC_ASSERT(device, return);
-    QTC_ASSERT(this != DeviceManagerPrivate::instance || device->isAutoDetected(), return);
+    QTC_ASSERT(this != instance() || device->isAutoDetected(), return);
 
     const bool wasDefault = d->defaultDevices.value(device->type()) == device->internalId();
     const QString deviceType = device->type();
@@ -295,11 +281,11 @@ void DeviceManager::removeDevice(int idx)
             }
         }
     }
-    if (this == d->instance && d->clonedInstance) {
+    if (this == instance() && d->clonedInstance) {
         d->clonedInstance->removeDevice(d->clonedInstance->
             indexForInternalId(device->internalId()));
     }
-    if (this == d->instance && device->isAutoDetected())
+    if (this == instance() && device->isAutoDetected())
         d->inactiveAutoDetectedDevices << device;
 
     emit updated();
@@ -307,7 +293,7 @@ void DeviceManager::removeDevice(int idx)
 
 void DeviceManager::setDeviceDisplayName(int i, const QString &name)
 {
-    QTC_ASSERT(this != DeviceManagerPrivate::instance, return);
+    QTC_ASSERT(this != instance(), return);
     QTC_ASSERT(i >= 0 && i < deviceCount(), return);
 
     d->devices.at(i)->setDisplayName(name);
@@ -316,7 +302,7 @@ void DeviceManager::setDeviceDisplayName(int i, const QString &name)
 
 void DeviceManager::setDefaultDevice(int idx)
 {
-    QTC_ASSERT(this != DeviceManagerPrivate::instance, return);
+    QTC_ASSERT(this != instance(), return);
     QTC_ASSERT(idx >= 0 && idx < deviceCount(), return);
 
     const IDevice::ConstPtr &device = d->devices.at(idx);
@@ -353,8 +339,10 @@ QString DeviceManager::displayNameForDeviceType(const QString &type)
     return tr("Unknown OS");
 }
 
-DeviceManager::DeviceManager() : d(new DeviceManagerPrivate)
+DeviceManager::DeviceManager(bool doLoad) : d(new DeviceManagerPrivate)
 {
+    if (doLoad)
+        load();
 }
 
 DeviceManager::~DeviceManager()

src/plugins/projectexplorer/devicesupport/devicemanager.h

@@ -50,7 +50,6 @@ class PROJECTEXPLORER_EXPORT DeviceManager : public QObject
 {
     Q_OBJECT
     friend class Internal::DeviceSettingsWidget;
-    friend class ProjectExplorerPlugin;
 public:
     ~DeviceManager();
 
@@ -80,7 +79,7 @@ signals:
     void updated(); // Emitted for all of the above.
 
 private:
-    DeviceManager();
+    DeviceManager(bool doLoad = false);
 
     void load();
     void save();
@@ -102,8 +101,6 @@ private:
     static QString settingsFilePath();
     static void copy(const DeviceManager *source, DeviceManager *target, bool deep);
 
-    static void deleteInstance(); // For ProjectExplorerPlugin.
-
     Internal::DeviceManagerPrivate * const d;
 };
 

src/plugins/projectexplorer/projectexplorer.cpp

@@ -79,7 +79,6 @@
 #include "buildconfiguration.h"
 #include "miniprojecttargetselector.h"
 #include "taskhub.h"
-#include "devicesupport/devicemanager.h"
 #include "devicesupport/devicesettingspage.h"
 #include "publishing/ipublishingwizardfactory.h"
 #include "publishing/publishingwizardselectiondialog.h"
@@ -287,7 +286,6 @@ ProjectExplorerPlugin::ProjectExplorerPlugin()
 
 ProjectExplorerPlugin::~ProjectExplorerPlugin()
 {
-    DeviceManager::deleteInstance();
     removeObject(d->m_welcomePage);
     delete d->m_welcomePage;
     removeObject(this);