Importnant update:

- Add callback functions for change in socket states

SelectableCore.h

@@ -47,6 +47,9 @@ typedef struct SHandle          THandle;
 class CSelect;
 class CSelectableCore;
 
+// Callback function for handle events
+typedef void (*FHandleCallback)( CSelectableCore * Function, THandle * Handle, EConnectState State );
+
 //---------------------------------------------------------------------------
 
 // List of Handles for Select Object
@@ -71,6 +74,14 @@ struct SHandle {
     char            * Name;
     EConnectType    Type;
 
+    // State
+    int             FD;
+    EConnectState   State;
+    bool            Auto;
+
+    // Callback functions
+    FHandleCallback StateCallback[ 6 ];
+
     // Type specific parameters
     char        * Path;    // Port (file)name or Exec path
 
@@ -80,11 +91,6 @@ struct SHandle {
     int         PortNo;    // Socket port no
     bool        KeepAlive; // Socket keep alive
 
-    // State
-    int             FD;
-    EConnectState   State;
-    bool            Auto;
-
     // Buffers
     CBuffer     * InBuffer;
     CBuffer     * OutBuffer;
@@ -174,6 +180,15 @@ protected:
         return ((Handle)? Handle->State : csNone);
     };
 
+    // General fucntions
+    inline bool ChangeState( THandle * Handle, EConnectState State ) {
+        if (!Handle || (Handle->State == State)) return false;
+        if (Handle->StateCallback[ (int)State ])
+            (Handle->StateCallback[ (int)State ])( this, Handle, State );
+        Handle->State = State;
+        return true;
+    }
+
     // Port Operations
     virtual int  OpenPort( THandle * Handle );
 
@@ -220,6 +235,7 @@ public:
 
     // Configuration
     THandle *   CreateHandle( const char * HandleName, bool CreateChannel );
+    bool    SetCallback( THandle * Handle, EConnectState pState, FHandleCallback pCallback );
     bool    SetAutoManage( THandle * Handle, bool AutoManage, int ReopenTime = 0 );
     bool    SetBuffers( THandle * Handle, int InBufSize, int OutBufSize, int InTimeout, const char * InMarker, int InMarkerLen );
     bool    SerialConfig( THandle * Handle, int Baud, short DataBits, short StopBits, short Parity, short FlowCtrl, int Wait );