php-doc-en/reference/ev/evsignal.xml
Ruslan Osmanov 8d666e8198 Applied XML formatting
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@328910 c90b9560-bf6c-de11-be94-00142212c4b1
2012-12-27 17:33:55 +00:00

123 lines
4.1 KiB
XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<phpdoc:classref xml:id="class.evsignal" xmlns:phpdoc="http://php.net/ns/phpdoc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xi="http://www.w3.org/2001/XInclude">
<title>The EvSignal class</title>
<titleabbrev>EvSignal</titleabbrev>
<partintro>
<!-- {{{ EvSignal intro -->
<section xml:id="evsignal.intro">
&reftitle.intro;
<para>
<classname>EvSignal</classname>
watchers will trigger an event when the process receives a specific signal
one or more times. Even though signals are very asynchronous,
<emphasis>libev</emphasis>
will try its best to deliver signals synchronously, i.e. as part of the
normal event processing, like any other event.
</para>
<para>
There is no limit for the number of watchers for the same signal, but only
within the same loop, i.e. one can watch for
<constant>SIGINT</constant>
in the default loop and for
<constant>SIGIO</constant>
in another loop, but it is not allowed to watch for
<constant>SIGINT</constant>
in both the default loop and another loop at the same time. At the moment,
<constant>SIGCHLD</constant>
is permanently tied to the default loop.
</para>
<para>
If possible and supported,
<emphasis>libev</emphasis>
will install its handlers with
<literal>SA_RESTART</literal>
(or equivalent) behaviour enabled, so system calls should not be unduly
interrupted. In case of a problem with system calls getting interrupted by
signals, all the signals can be blocked in an
<classname>EvCheck</classname>
watcher and unblocked in a
<classname>EvPrepare</classname>
watcher.
</para>
</section>
<!-- }}} -->
<section xml:id="evsignal.synopsis">
&reftitle.classsynopsis;
<!-- {{{ Synopsis -->
<classsynopsis>
<ooclass>
<classname>EvSignal</classname>
</ooclass>
<!-- {{{ Class synopsis -->
<classsynopsisinfo>
<ooclass>
<classname>EvSignal</classname>
</ooclass>
<ooclass>
<modifier>extends</modifier>
<classname>EvWatcher</classname>
</ooclass>
</classsynopsisinfo>
<!-- }}} -->
<classsynopsisinfo role="comment">&Properties;</classsynopsisinfo>
<fieldsynopsis>
<modifier>public</modifier>
<varname linkend="evsignal.props.signum">signum</varname>
</fieldsynopsis>
<classsynopsisinfo role="comment">&InheritedProperties;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('evwatcher.synopsis')/descendant::db:fieldsynopsis)" />
<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evsignal')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[1])" />
<classsynopsisinfo role="comment">&InheritedMethods;</classsynopsisinfo>
<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evwatcher')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[1])" />
</classsynopsis>
<!-- }}} -->
</section>
<!-- {{{ EvSignal properties -->
<section xml:id="evsignal.props">
&reftitle.properties;
<variablelist>
<varlistentry xml:id="evsignal.props.signum">
<term>
<varname>signum</varname>
</term>
<listitem>
<para>
Signal number. See the constants exported by
<emphasis>pcntl</emphasis>
extension. See also
<literal>signal(7)</literal>
man page.
</para>
</listitem>
</varlistentry>
</variablelist>
</section>
<!-- }}} -->
</partintro>
&reference.ev.entities.evsignal;
</phpdoc:classref>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->