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<h2 class="chapter">12 Threading</h2>
<p>SBCL supports a fairly low-level threading interface that maps onto
the host operating system's concept of threads or lightweight
processes. This means that threads may take advantage of hardware
multiprocessing on machines that have more than one CPU, but it does
not allow Lisp control of the scheduler. This is found in the
SB-THREAD package.
<p>This requires Linux (2.6+ or systems with NPTL backports) running on the
x86 or x86-64 architecture, or SunOS (Solaris) on the x86. Support for
threading on Darwin (Mac OS X) and FreeBSD on the x86 is experimental.
<ul class="menu">
<li><a accesskey="1" href="Threading-basics.html#Threading-basics">Threading basics</a>
<li><a accesskey="2" href="Special-Variables.html#Special-Variables">Special Variables</a>
<li><a accesskey="3" href="Mutex-Support.html#Mutex-Support">Mutex Support</a>
<li><a accesskey="4" href="Semaphores.html#Semaphores">Semaphores</a>
<li><a accesskey="5" href="Waitqueue_002fcondition-variables.html#Waitqueue_002fcondition-variables">Waitqueue/condition variables</a>
<li><a accesskey="6" href="Sessions_002fDebugging.html#Sessions_002fDebugging">Sessions/Debugging</a>
<li><a accesskey="7" href="Foreign-threads.html#Foreign-threads">Foreign threads</a>
<li><a accesskey="8" href="Implementation-_0028Linux-x86_002fx86_002d64_0029.html#Implementation-_0028Linux-x86_002fx86_002d64_0029">Implementation (Linux x86/x86-64)</a>
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