">getopt</code> function. We can also
        remove our <code class="function">usage()</code> function because we no
        longer require any command line arguments. 
    </p>
      <pre class="programlisting">/* File: txn_guide_inmemory.c */

/* We assume an ANSI-compatible compiler */
#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;string.h&gt;
#include &lt;pthread.h&gt;
#include &lt;db.h&gt;

/* Run 5 writers threads at a time. */
#define NUMWRITERS 5

/*
 * Printing of pthread_t is im