title: Is there something to replace the <ucontext.h> functions?
body: <p>The user thread functions in <code>&lt;ucontext.h&gt;</code> are deprecated because they use a deprecated C feature (they <a href="http://www.opengroup.org/onlinepubs/009695399/functions/makecontext.html">use a function declaration with empty parentheses for an argument</a>).</p>
  
  <p>Is there a standard replacement for them? I don't feel full-fledged threads are good at implementing cooperative threading.</p>