Multiple QtConcurrent::map execution order

Lets say I have a vector of 100 elements and Func1 and Func2. In the single threaded version Func1 process vector elements and when Func1 finishes, Func2 must start a different process on elements. I'm curious to know if I utilize QtConcurrent::map in the following order, in which order actually Func1 and Func2 will execute?

QFuture<void> future;
future = QtConcurrent::map(vector, Func1);
future = QtConcurrent::map(vector, Func2);

I must mention that using future.waitForFinished() will block my application main thread which I don't want.

future = QtConcurrent::map(vector, Func1);
future.waitForFinished();
future = QtConcurrent::map(vector, Func2);

Also I don't want to execute those QtConcurrent::map in a secondary thread and do the future.waitForFinished() there, because in that approach I will lose one of my threads in threadpool. So, the question is do tasks added by QtConcurrent::map execute in order?

EDIT

In both single threaded and multi-threaded approaches Func2 must run only after Func1 finishes processing all elements.

Since you want all calls to Func1 to complete before any calls to Func2 are made you can't make the second call to QtConcurrent::map before the first is known to have finished.

However, rather than calling future.waitForFinished() you can use a QFutureWatcher...

QFutureWatcher<void> watcher;
auto future = QtConcurrent::map(vector, Func1);
QObject::connect(&watcher, &QFutureWatcher::finished,
                 [&]()
                   {

                     /*
                      * All calls to Func1 have finished so it's
                      * safe to invoke Func2.
                      */
                     future = QtConcurrent::map(vector, Func2);
                   });
watcher.setFuture(future);

The above is untested but hopefully gives you some idea of what's required.