TDM Rerun #10: Synchronisation Toolkit Revisited

The plan for this article was to present an implementation of a shared memory pool: a mechanism that allows multiple data producers to send data to one data manipulator. In fact, I already had all the code and half the article completed when I found out that my solution doesn't always work. Everything was OK when both ends of the pool (producer and manipulator) were implemented in the same application or in two 'normal' applications. But if I tried to change one of those apps into an NT service, the shared pool stopped working. - Synchronisation Toolkit Revisited, The Delphi Magazine 91, March 2003 My 10th TDM article returned to my pet theme - synchronisation and communication. First part described some aspects of the NT security model and second implemented shared memory-based queue, capable of transporting messages from a GUI application to a service and back. It looks like I'll have to return to that topic again - I got some reports recently that my approach doesn't (always?) work on Vista :( Links: article (PDF, 54KB), source code (ZIP, 2.2 MB), current GpSync unit