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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@328910 c90b9560-bf6c-de11-be94-00142212c4b1
123 lines
4.1 KiB
XML
123 lines
4.1 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<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">
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<title>The EvSignal class</title>
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<titleabbrev>EvSignal</titleabbrev>
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<partintro>
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<!-- {{{ EvSignal intro -->
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<section xml:id="evsignal.intro">
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&reftitle.intro;
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<para>
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<classname>EvSignal</classname>
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watchers will trigger an event when the process receives a specific signal
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one or more times. Even though signals are very asynchronous,
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<emphasis>libev</emphasis>
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will try its best to deliver signals synchronously, i.e. as part of the
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normal event processing, like any other event.
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</para>
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<para>
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There is no limit for the number of watchers for the same signal, but only
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within the same loop, i.e. one can watch for
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<constant>SIGINT</constant>
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in the default loop and for
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<constant>SIGIO</constant>
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in another loop, but it is not allowed to watch for
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<constant>SIGINT</constant>
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in both the default loop and another loop at the same time. At the moment,
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<constant>SIGCHLD</constant>
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is permanently tied to the default loop.
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</para>
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<para>
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If possible and supported,
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<emphasis>libev</emphasis>
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will install its handlers with
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<literal>SA_RESTART</literal>
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(or equivalent) behaviour enabled, so system calls should not be unduly
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interrupted. In case of a problem with system calls getting interrupted by
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signals, all the signals can be blocked in an
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<classname>EvCheck</classname>
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watcher and unblocked in a
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<classname>EvPrepare</classname>
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watcher.
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</para>
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</section>
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<!-- }}} -->
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<section xml:id="evsignal.synopsis">
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&reftitle.classsynopsis;
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<!-- {{{ Synopsis -->
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<classsynopsis>
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<ooclass>
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<classname>EvSignal</classname>
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</ooclass>
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<!-- {{{ Class synopsis -->
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<classsynopsisinfo>
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<ooclass>
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<classname>EvSignal</classname>
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</ooclass>
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<ooclass>
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<modifier>extends</modifier>
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<classname>EvWatcher</classname>
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</ooclass>
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</classsynopsisinfo>
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<!-- }}} -->
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<classsynopsisinfo role="comment">&Properties;</classsynopsisinfo>
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<fieldsynopsis>
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<modifier>public</modifier>
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<varname linkend="evsignal.props.signum">signum</varname>
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</fieldsynopsis>
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<classsynopsisinfo role="comment">&InheritedProperties;</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('evwatcher.synopsis')/descendant::db:fieldsynopsis)" />
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<classsynopsisinfo role="comment">&Methods;</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evsignal')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[1])" />
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<classsynopsisinfo role="comment">&InheritedMethods;</classsynopsisinfo>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('class.evwatcher')/db:refentry/db:refsect1[@role='description']/descendant::db:methodsynopsis[1])" />
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</classsynopsis>
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<!-- }}} -->
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</section>
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<!-- {{{ EvSignal properties -->
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<section xml:id="evsignal.props">
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&reftitle.properties;
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<variablelist>
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<varlistentry xml:id="evsignal.props.signum">
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<term>
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<varname>signum</varname>
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</term>
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<listitem>
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<para>
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Signal number. See the constants exported by
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<emphasis>pcntl</emphasis>
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extension. See also
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<literal>signal(7)</literal>
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man page.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</section>
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<!-- }}} -->
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</partintro>
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&reference.ev.entities.evsignal;
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</phpdoc:classref>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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