v4l2 and timers

    Hello again!

    I have another programming question.

    In my program i need to use timers. To do this, i use clock().

   clock() works fine until i initialize v4l2 and start grabbing:

{
clock_t ini, end;

    ini=clock();    // <- ok
    MakeAnything();
    end=clock()    // <- this works

    InitializeV4L2();
    while (!end)
    {
        ini=clock();    // <- this doesn't work
        Grab();
        MakeAnotherThing();
        end=clock();    // <- nor do this
    }
}

    I am grabbing using 4 buffers of memory.
    I wait for the filled buffers witch select()

    Is the select() affecting clock()??
    
Bye
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