Added the thread safe TSQueue and using it in mainwindow to replace the adhoc queue implementation.

asyncdbconnection.cpp

@@ -0,0 +1,61 @@
+#include "asyncdbconnection.h"
+
+ASyncDBConnection::ASyncDBConnection()
+{
+
+}
+
+void ASyncDBConnection::setupConnection(const std::string &connstring)
+{}
+
+void ASyncDBConnection::closeConnection()
+{}
+
+void ASyncDBConnection::setStateCallback(on_state_callback state_callback)
+{}
+
+
+void ASyncDBConnection::Thread::run()
+{
+	while (!terminateRequested) {
+
+		// make or recover connection
+		if (makeConnection()) {
+			// send commands and receive results
+			communicate();
+		}
+
+	}
+
+	// close connection
+}
+
+bool ASyncDBConnection::Thread::makeConnection()
+{
+	while (!terminateRequested) {
+
+		// start connecting
+
+		// poll till complete or failed (we can get an abort command)
+
+		// if connected return true
+		// else retry (unless we get a command to stop then return false)
+	}
+	return false;
+}
+
+void ASyncDBConnection::Thread::communicate()
+{
+	while (!terminateRequested) {
+		// wait for something to do:
+		// - command to send to server
+		//   - wait for results and (notifies can also come in)
+		//   - pass each result on to the completion routine
+		// - notify comming in from the server
+		//   - pass to notify callback
+		// - connection raises an error
+		//   - return
+		// - stop signal
+		//   - return
+	}
+}