Beispiel

<body><div class="illustration"><h1 class="title"> Beispiel</h1> <p> Einfachste mögliche Verklemmungssituation: <a class="target-anchor" name="fig3-3c-bmgraph(atom)"></a> </p> <p><img align="top" alt="" src="../atoms/fig3-3c-bmgraph.png"></img> </p> <p></p> <table cellpadding="0" width="100%"><tr><td width="100%"><p>(Bildquelle: Tanenbaum, Modern Operating Systems)</p> </td> </tr> </table> <p> Mögliche zugehörige Abläufe am Beispiel der Abstimmung über Semaphore: <tt> </tt> </p> <table cellpadding="0" width="100%"><tr><td colspan="2" width="100%"><p><tt> semaphore sema_T = 1, sema_U = 1; </tt> </p> </td> </tr> <tr><td colspan="2" width="100%"><p><tt>void process_C () {</tt> </p> </td> </tr> <tr><td rowspan="5" width="5%"><p><tt></tt> </p> </td> <td width="95%"><p><tt>down(sema_U);</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>down(sema_T);</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>use_U_and_T();</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>up(sema_T);</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>up(sema_U);</tt> </p> </td> </tr> <tr><td colspan="2" width="100%"><p><tt>}</tt> </p> </td> </tr> <tr><td colspan="2" width="100%"><p><tt>void process_D () {</tt> </p> </td> </tr> <tr><td rowspan="5" width="5%"><p><tt></tt> </p> </td> <td width="95%"><p><tt>down(sema_T);</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>down(sema_U);</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>use_U_and_T();</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>up(sema_U);</tt> </p> </td> </tr> <tr><td width="95%"><p><tt>up(sema_T);</tt> </p> </td> </tr> <tr><td colspan="2" width="100%"><p><tt>}</tt> </p> </td> </tr> </table> <p><tt></tt> </p> <div class="endkernel"></div> </div> <div class="footer"><p>© UniBW Informatik 2013, Generated by Targeteam</p> </div> </body>