On Wed, Sep 26, 2007 at 10:58:41PM +0200, Peter Kümmel wrote:
> Abdelrazak Younes wrote:
> >>Using ::exit often results (with Qt) in a crash because destructors
> >>of static (Qt) objects are called in arbitrary order.
> >
> >Are you sure? AFAIK ::exit() will exit without any cleanup.
>
> #include <stdlib.h>
>
> struct A {
> int* ptr;
> A() : ptr(0) {}
> ~A() { int i = *ptr; }
> };
>
> // comment out to avoid crash (msvc)
> A a;
>
> int main() {
> A b;
> exit(1);
> return 0;
> }
>
>
> >
> >>The best solution
> >>would be to leave Qt's event loop and to regulary return from app.exec().
> >>
> >>Therefore, does it work to call QCoreApplication::exit instead of ::exit?
> >
> >I've tried and it doesn't work fine because then we exit normally.
>
> Wouldn't it be better to catch an exception in main:
>
> catch {
> QCoreApplication::exit(1)
> return 1;
> }
>
> I only ask, because we had really strange cross-platform problems in the
> past because of using exit
Right. ::exit() should not be used. Ever (except perhaps for very simple
C programs, but even then there will usually some way to 'return' from
main...
Andre'
