Split JackWaitThreadedDriver's Execute method

This makes it possible to use JackWaitThreadedDriver as a base class
for a non-threaded version.

common/JackWaitThreadedDriver.cpp

@@ -37,16 +37,21 @@ bool JackWaitThreadedDriver::Init()
 
 bool JackWaitThreadedDriver::Execute()
 {
-    try {
+    SetRealTime();
 
-        SetRealTime();
+    // Process a null cycle until NetDriver has started
+    while (!fStarter.fRunning && fThread.GetStatus() == JackThread::kRunning) {
+        // Use base class method
+        assert(static_cast<JackWaiterDriver*>(fDriver));
+        static_cast<JackWaiterDriver*>(fDriver)->ProcessNull();
+    }
 
-        // Process a null cycle until NetDriver has started
-        while (!fStarter.fRunning && fThread.GetStatus() == JackThread::kRunning) {
-            // Use base class method
-            assert(static_cast<JackWaiterDriver*>(fDriver));
-            static_cast<JackWaiterDriver*>(fDriver)->ProcessNull();
-        }
+    return ExecuteReal();
+}
+
+bool JackWaitThreadedDriver::ExecuteReal()
+{
+    try {
 
         // Switch to keep running even in case of error
         while (fThread.GetStatus() == JackThread::kRunning) {

common/JackWaitThreadedDriver.h

@@ -28,10 +28,10 @@ namespace Jack
 {
 
 /*!
-\brief To be used as a wrapper of JackNetDriver.
+\brief Wrapper for a restartable threaded driver (e.g. JackNetDriver).
 
 The idea is to behave as the "dummy" driver, until the network connection is really started and processing starts.
-The Execute method will call the Process method from the base JackTimedDriver, until the decorated driver Init method returns.
+The Execute method will call the ProcessNull method from the base JackWaiterDriver, until the decorated driver Initialize method returns.
 A helper JackDriverStarter thread is used for that purpose.
 */
 
@@ -89,6 +89,10 @@ class SERVER_EXPORT JackWaitThreadedDriver : public JackThreadedDriver
         // JackRunnableInterface interface
         bool Init();
         bool Execute();
+
+    protected:
+
+        virtual bool ExecuteReal(); /*!< Real work to be done when the decorated driver has finish initializing */
 };