Important Update:

- DeviceCore:
  - Added PollCycle variable (not used here)
- WatchdogCore:
  - Return "true" on in Process()
- SelectableCore:
  - Minor update (code compacted)
- Application/Function:
  - Added CApplication as friend of CFunction
  - Added param WaitToTerminate on Function
  - Application Run() only exists if all (WaitToTerminate) functions
    has terminated cleanly.

DeviceCore.h

@@ -31,8 +31,8 @@ const char DataTypeName[][20] = { "None", "Unsigned16", "Signed16", "Unsigned32_
 // Structure prototypes
 typedef struct SDevice           TDevice;
 typedef struct SDeviceParam      TDeviceParam;
-typedef struct SDeviceParamGroup TDeviceParamGroup;
-typedef struct SDeviceParamItem  TDeviceParamItem;
+typedef struct SDeviceParamGroup TDeviceParamGroup;     // Parameter group, e.g. used with polling parameters
+typedef struct SDeviceParamItem  TDeviceParamItem;      // Placeholder parameters in Parameter groups
 
 //---------------------------------------------------------------------------
 
@@ -138,6 +138,7 @@ protected:
     TChannel    * EventChannel  = NULL;
 
     // Poll
+    int         PollCycle;          // Device Polling state, e.g. Init, Connect, Run, Disonnect, Shutdown
     int         PollStep;           // Position in polling sequence
     timeval     PollWait;           // Time at which last poll was done
     long        PollInterval;       // Minimum delay between polls