[Interest] Lifetime of data involved in QtConcurrent functions
Stephen Chu
stephen at ju-ju.com
Sun Sep 30 01:02:02 CEST 2012
I am implementing some threaded task with QtConcurrent framework,
specifically mapped() function.
I have some questions regarding the lifetime of various data used:
Say I have the following code:
QList<MyData> myList;
... // code to connect myFutureWatcher to slots
....
auto future = QtConcurrent::mapped(myList, myMapFunction);
myFutureWatcher.setFuture(future);
Does mapped() make a copy of myList? Or do I have to make sure it lasts
until future.isFinished()?
Also, is it OK for future to go out of scope? Or do I once again have to
keep it alive until it's all finished?
Thanks
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