-<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
+<?xml version='1.0'?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
- This file is part of systemd.
-
- Copyright 2015 Zbigniew Jędrzejewski-Szmek
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
+ SPDX-License-Identifier: LGPL-2.1+
-->
<refentry id="sd_event_wait" xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>sd_event_wait</title>
<productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Tom</firstname>
- <surname>Gundersen</surname>
- <email>teg@jklm.no</email>
- </author>
- </authorgroup>
</refentryinfo>
<refmeta>
<refname>sd_event_prepare</refname>
<refname>sd_event_dispatch</refname>
<refname>sd_event_get_state</refname>
+ <refname>sd_event_get_iteration</refname>
<refname>SD_EVENT_INITIAL</refname>
<refname>SD_EVENT_PREPARING</refname>
<refname>SD_EVENT_ARMED</refname>
<paramdef>sd_event *<parameter>event</parameter></paramdef>
</funcprototype>
+ <funcprototype>
+ <funcdef>int <function>sd_event_get_iteration</function></funcdef>
+ <paramdef>sd_event *<parameter>event</parameter></paramdef>
+ <paramdef>uint64_t *<parameter>ret</parameter></paramdef>
+ </funcprototype>
+
</funcsynopsis>
</refsynopsisdiv>
and
<citerefentry><refentrytitle>sd_event_loop</refentrytitle><manvolnum>3</manvolnum></citerefentry>
for higher-level functions that execute individual but complete
- iterations of an event loop or run it continously.</para>
+ iterations of an event loop or run it continuously.</para>
<para><function>sd_event_prepare()</function> checks for pending
events and arms necessary timers. If any events are ready to be
determine the state the event loop is currently in. It returns one
of the states described below.</para>
- <para>All four functions take, as the first argument, the event
- loop object <parameter>event</parameter> that has been created
- with <function>sd_event_new()</function>. The timeout for
- <function>sd_event_wait()</function> is specified in
- <parameter>usec</parameter> in milliseconds. <constant>(uint64_t)
- -1</constant> may be used to specify an infinite timeout.</para>
+ <para><function>sd_event_get_iteration()</function> may be used to determine the current iteration of the event
+ loop. It returns an unsigned 64bit integer containing a counter that increases monotonically with each iteration of
+ the event loop, starting with 0. The counter is increased at the time of the
+ <function>sd_event_prepare()</function> invocation.</para>
+
+ <para>All five functions take, as the first argument, the event loop object <parameter>event</parameter> that has
+ been created with <function>sd_event_new()</function>. The timeout for <function>sd_event_wait()</function> is
+ specified in <parameter>usec</parameter> in microseconds. <constant>(uint64_t) -1</constant> may be used to
+ specify an infinite timeout.</para>
</refsect1>
<refsect1>
<term><constant>SD_EVENT_PREPARING</constant></term>
<listitem><para>An event source is currently being prepared,
- i.e. the preparation handler is currently being excuted, as
+ i.e. the preparation handler is currently being executed, as
set with
- <citerefentry><refentrytitle>sd_event_set_prepare</refentrytitle><manvolnum>3</manvolnum></citerefentry>. This
+ <citerefentry><refentrytitle>sd_event_source_set_prepare</refentrytitle><manvolnum>3</manvolnum></citerefentry>. This
state is only seen in the event source preparation handler
that is invoked from the
<function>sd_event_prepare()</function> call and is
<citerefentry><refentrytitle>sd_event_add_io</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_add_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_event_add_child</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_event_add_inotify</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_add_defer</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_event_add_exit</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_event_add_post</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_run</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_get_fd</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_source_set_prepare</refentrytitle><manvolnum>3</manvolnum></citerefentry>
projects / thirdparty / systemd.git / blobdiff