.NET (Core and Framework)

// I assume there is a MyList with all items and methods Op1(int index) and Op2(int index) to do the work
private volatile int worker1index = 0;
private volatile int worker2index = 0;

private void Worker1()
{
    for (worker1index = 0; worker1index < MyList.Length; worker1index++)
    {
        Op1(worker1index)
    }
}

private void Worker2()
{
    for (worker2index = 0; worker2index < MyList.Length; worker2index++)
    {
        // make sure we're not ahead of Worker1:
        while (worker1index <= worker2index)
        {
            // put this thread to sleep for specified number of milliseconds until we check
            // again to see if Worker1 has caught up with us:
            Sleep(100); // adjust to a reasonably small part of Op1:s normal execution time
        }
        Op2(worker2index);
    }
}

Nelek wrote:

Should I get this update?

Mike Dimmick wrote:

Imagers, which simply take an image in the same way as a digital camera, can generally handle both 1D and 2D barcodes.