improved stability of distributed processing:

* a worker thread puts every new task into a "pending" queue immediately after accepting it
* the "pending" check is checked regularly for old items -> they are reinjected into the task queue
* the risk of losing a task is now close to zero


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@949 bbaffbd6-741e-11dd-a85d-61de82d9cad9

Changelog

@@ -20,6 +20,7 @@ Version 0.4.1 - UNRELEASED
  * optional visualization of toolpath direction
  * visibility of 3D view items is now configurable in the 3D window
   * via a button and via the context menu
+ * improved stability of remote processing: disconnected nodes should not cause problems anymore
 
 Version 0.4.0.1 - 2010-10-24
  * disabled parallel processing for Windows standalone executable