<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>ext:without-interrupts</title><link rel="stylesheet" href="ecl.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="The ECL manual"><link rel="up" href="ch22s05.html" title="7.5. Signals Reference"><link rel="prev" href="re35.html" title="ext:with-interrupts"><link rel="next" href="ch23.html" title="Chapter 8. Embedding ECL"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><code class="function">ext:without-interrupts</code></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re35.html">Prev</a> </td><th width="60%" align="center">7.5. Signals Reference</th><td width="20%" align="right"> <a accesskey="n" href="ch23.html">Next</a></td></tr></table><hr></div><div class="refentry" title="ext:without-interrupts"><a name="ref.signals.without-interrupts"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p><code class="function">ext:without-interrupts</code> — Execute code without being interrupted.</p></div><div class="refsynopsisdiv" title="Macro"><h2>Macro</h2><div class="funcsynopsis"><p><code class="funcdef">(ext:without-interrupts</code> &body body)</p></div></div><div class="refsect1" title="Description"><a name="id669507"></a><h2>Description</h2><p>Executes the given body with all interrupts disabled. This
macro is compatible with the one in <span class="application">SBCL</span> and as such it also
defines three other local macros
<code class="function">ext:allow-with-interrupts</code>,
<code class="function">ext:with-local-interrupts</code> and
<code class="function">ext:with-restored-interrupts</code>.</p><p>Deferrable interrupts include most blockable POSIX signals,
and <code class="function">mp:interrupt-process</code>. Does not interfere
with garbage collection, and does not inhibit scheduling of other
threads.</p><p>This macro binds <code class="function">allow-with-interrupts</code>,
<code class="function">with-local-interrupts</code> and
<code class="function">with-restored-interrupts</code> as a local
macros.</p><p><code class="function">ext:with-restored-interrupts</code> executes
the body with interrupts enabled if and only if the
<code class="function">ext:without-interrupts</code> was in an environment
in which interrupts were allowed.</p><p><code class="function">ext:allow-with-interrupts</code> allows the
<code class="function">ext:with-interrupts</code> to take effect during the
dynamic scope of its body, unless there is an outer
<code class="function">ext:without-interrupts</code> without a
corresponding
<code class="function">ext:allow-with-interrupts</code>.</p><p><code class="function">ext:with-local-interrupts</code> executes its
body with interrupts enabled provided that for there is an
<code class="function">ext:allow-with-interrupts</code> for every
<code class="function">ext:without-interrupts</code> surrounding the current
one. <code class="function">ext:with-local-interrupts</code> is equivalent
to:</p><pre class="programlisting">
(allow-with-interrupts (with-interrupts ...))
</pre><p>Care must be taken not to let either
<code class="function">ext:allow-with-interrupts</code> or
<code class="function">ext:with-local-interrupts</code> appear in a function
that escapes from inside the
<code class="function">ext:without-interrupts</code> in:</p><pre class="programlisting">
(without-interrupts
;; The body of the lambda would be executed with WITH-INTERRUPTS allowed
;; regardless of the interrupt policy in effect when it is called.
(lambda () (allow-with-interrupts ...)))
(without-interrupts
;; The body of the lambda would be executed with interrupts enabled
;; regardless of the interrupt policy in effect when it is called.
(lambda () (with-local-interrupts ...)))
</pre></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="re35.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="ch22s05.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch23.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><code class="function">ext:with-interrupts</code> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 8. Embedding <span class="application">ECL</span></td></tr></table></div></body></html>
