Index: /trunk/source/doc/src/threads.xml
===================================================================
--- /trunk/source/doc/src/threads.xml	(revision 14527)
+++ /trunk/source/doc/src/threads.xml	(revision 14528)
@@ -2169,4 +2169,51 @@
     </refentry>
 
+    <refentry id="m_with-interrupts-enabled">
+	  <indexterm zone="m_with-interrupts-enabled">
+	    <primary>with-interrupts-enabled</primary>
+	  </indexterm>
+
+	  <refnamediv>
+	    <refname>WITH-INTERRUPTS-ENABLED</refname>
+	    <refpurpose>Evaluates its body in an environment in which
+	      process-interrupt requests have immediate effect.</refpurpose>
+	    <refclass>Macro</refclass>
+	  </refnamediv>
+
+	  <refsynopsisdiv>
+	    <synopsis><function>with-interrupts-enabled</function>
+	      &body; body => result</synopsis>
+	  </refsynopsisdiv>
+
+	  <refsect1>
+	    <title>Arguments and Values</title>
+
+	    <variablelist>
+	      <varlistentry>
+	        <term>body</term>
+	        <listitem>
+		      <para>an implicit progn.</para>
+	        </listitem>
+	      </varlistentry>
+	      <varlistentry>
+	        <term>result</term>
+	        <listitem>
+		      <para>the primary value returned by
+		        <varname>body</varname>.</para>
+	        </listitem>
+	      </varlistentry>
+	    </variablelist>
+	  </refsect1>
+
+	  <refsect1>
+	    <title>Description</title>
+
+	    <para>Executes <varname>body</varname>
+	      in an environment in which <xref linkend="f_process-interrupt"/>
+	      requests have immediate effect.
+	    </para>
+	  </refsect1>
+    </refentry>
+
     <refentry id="f_make-lock">
 	  <indexterm zone="f_make-lock">
Index: /trunk/source/doc/src/using.xml
===================================================================
--- /trunk/source/doc/src/using.xml	(revision 14527)
+++ /trunk/source/doc/src/using.xml	(revision 14528)
@@ -3248,4 +3248,32 @@
 </refentry>
 
+<refentry id="v_unwind-protect">
+  <indexterm zone="v_unwind-protect">
+    <primary>unwind-protect</primary>
+  </indexterm>
+  
+  <refnamediv>
+    <refname>UNWIND-PROTECT</refname>
+    <refpurpose>
+      Ensure cleanup-forms are executed.
+    </refpurpose>
+    <refclass>Special operator</refclass>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <synopsis>
+      <function>unwind-protect</function> protected-form {cleanup-form}*
+    </synopsis>
+  </refsynopsisdiv>
+
+  <refsect1><title>Summary</title>
+    <para>
+      In &CCL;, the cleanup forms are always executed as if they were
+      wrapped with <xref linkend="m_without-interrupts"/>.
+      To allow interrupts, use
+      <xref linkend="m_with-interrupts-enabled"/>.
+    </para>
+  </refsect1>
+</refentry>
 
 </sect1>