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<h2 class="chapter">23 Non-Local Exits</h2>

<p><a name="index-non_002dlocal-exits-2795"></a><a name="index-long-jumps-2796"></a>
Sometimes when your program detects an unusual situation inside a deeply
nested set of function calls, you would like to be able to immediately
return to an outer level of control.  This section describes how you can
do such <dfn>non-local exits</dfn> using the <code>setjmp</code> and <code>longjmp</code>
functions.

<ul class="menu">
<li><a accesskey="1" href="Non_002dLocal-Intro.html#Non_002dLocal-Intro">Intro</a>:         When and how to use these facilities. 
<li><a accesskey="2" href="Non_002dLocal-Details.html#Non_002dLocal-Details">Details</a>:     Functions for non-local exits. 
<li><a accesskey="3" href="Non_002dLocal-Exits-and-Signals.html#Non_002dLocal-Exits-and-Signals">Non-Local Exits and Signals</a>:   Portability issues. 
<li><a accesskey="4" href="System-V-contexts.html#System-V-contexts">System V contexts</a>:             Complete context control a la System V. 
</ul>

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