Magento process locking - partial 1

file1.php

<?php

class BigThings
{
    /**
     * Process all the things
     */
    public function changeEverything()
    {
        $this->log("Starting...hold on to your hats.");

        for ($i = 1; $i < 10000000000; $i++)
        {
            // Do something complicated with $i.
        }

        $this->log("Finished!  Whew.");
    }

    /**
     * Log a message to stdout.
     *
     * @param $msg
     */
    public function log($msg)
    {
        echo $msg . PHP_EOL;
    }
}