Hi, In revision #5076, I added a new gb.task component that allows you to run a class in the background.
Internally, the interpreter is "simply" forked. But it's not that simple. :-) How does it work? Once gb.task is checked in the IDE, you get a new class named "Task". To run a class in the background: - That class must inherit Task. - It must have a public "Main" method that takes no argument and returns nothing. That method will be run in the background. Instanciate the class, and it will be run automatically as soon as the event loop is run. The task object will raise a "Kill" event when it has been terminated. You can wait for the end of a task by using its Wait() method. You can stop a task by calling its Stop() method. You can get the process id of a task with its Handle property. As the method is run by a fork, it has access to every other part of the program, except that the main process that run the task will not see any change done by the task of course. The main process can simply modify some public variables in the task class to define the arguments of the task. But allowing the task to talk to the main process to give the result of its work is not done yet. Maybe the task Main() method will have a Variant return value that will be transparently serialized, sent to the main process, and deserialized. Or maybe the standard output of the task will be redirected to a pipe read by the main process. Or maybe the both solutions... I don't know yet. Another point. I don't think that gb.qt4 or gb.gtk will be usable inside a fork. I didn't try. But background tasks should normally be used for... background invisible tasks. Tell me what you think about all that! Regards, -- Benoît Minisini ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
