Adding a virtual dtor to InfoBackend.

2 files changed, 8 insertions, 1 deletions

diff --git a/libcontextsubscriber/src/infobackend.cpp b/libcontextsubscriber/src/infobackend.cpp
index 614c90e6..22f039e3 100644
--- a/libcontextsubscriber/src/infobackend.cpp
+++ b/libcontextsubscriber/src/infobackend.cpp
@@ -40,7 +40,7 @@
     used by ContextRegistryInfo and ContextPropertyInfo classes.
 */
 
-InfoBackend* InfoBackend::backendInstance = NULL;
+InfoBackend* InfoBackend::backendInstance = 0;
 
 /// Constructs the object. The \a connectCount is 0 on start.
 InfoBackend::InfoBackend(QObject *parent) : QObject(parent)
@@ -48,6 +48,10 @@ InfoBackend::InfoBackend(QObject *parent) : QObject(parent)
     connectCount = 0;
 }
 
+InfoBackend::~InfoBackend()
+{
+}
+
 /// Returns the actual singleton instance, creates it on first access. Mutex-protected.
 /// ContextRegistryInfo and ContextPropertyInfo use this method to access the backend.
 /// The optional \a backendName specifies the backend to force, ie: 'xml' or 'cdb'.
diff --git a/libcontextsubscriber/src/infobackend.h b/libcontextsubscriber/src/infobackend.h
index ff37e1e6..3688cea8 100644
--- a/libcontextsubscriber/src/infobackend.h
+++ b/libcontextsubscriber/src/infobackend.h
@@ -60,6 +60,9 @@ public:
     /// Returns a list of providers for the given key.
     virtual const QList<ContextProviderInfo> providersForKey(QString key) const = 0;
 
+    /// To make sure the subclasses are freed properly
+    virtual ~InfoBackend();
+
 Q_SIGNALS:
     /// Emitted when key list changes. ContextRegistryInfo listens on that.
     void keysChanged(const QStringList& currentKeys);