Just launch a function and do not append to it?

[hakermania]

I am not sure you got me....
What I need is to just launch a function like it was a separate program.
For example, if a timer was connected to a slot like this:

void slot_1(){
    while(1){
         sleep(10);
    }
}

void slot_1(){
    while(1){
         sleep(10);
    }
}

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the program would stack! I don't want it to 'stack'. I want to go forward even if such a function was called. Is this possible?
To be more realistic, I have a system command that reaches some files from the internet, and it may be late sometime and make my program unresponsive to clicks etc because of this....

PS: I though that QTimer::SingleShot was for that job but it does append to the slot unfortunately, so, after all, what's the difference between

QTimer::singleShot(0, this, SLOT(function()));

QTimer::singleShot(0, this, SLOT(function()));

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and

function();

function();

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Thanks for any answers!