threads, but there may be an arbitrary number of foreign
calls in progress at any one time, regardless of
the <literal>+RTS -N</literal> value.</para>
+
+ <para>If a call is annotated as <literal>interruptible</literal>
+ and the program was multithreaded, the call may be
+ interrupted in the event that the Haskell thread receives an
+ exception. The mechanism by which the interrupt occurs
+ is platform dependent, but is intended to cause blocking
+ system calls to return immediately with an interrupted error
+ code. The underlying operating system thread is not to be
+ destroyed.</para>
</sect3>
<sect3 id="haskell-threads-and-os-threads">