From 4dfefc1914bad6a025e2d6738999e45b74715002 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Thu, 25 Sep 2014 17:27:40 -0400
Subject: [PATCH] man: document sd_event_add_{defer,post,exit}
---
Makefile-man.am | 12 +++
man/sd_event_add_child.xml | 1 +
man/sd_event_add_defer.xml | 191 ++++++++++++++++++++++++++++++++++++++++++++
man/sd_event_add_signal.xml | 1 +
man/sd_event_add_time.xml | 1 +
5 files changed, 206 insertions(+)
create mode 100644 man/sd_event_add_defer.xml
diff --git a/Makefile-man.am b/Makefile-man.am
index 53e2f2cf17..bd5306e676 100644
--- a/Makefile-man.am
+++ b/Makefile-man.am
@@ -742,6 +742,7 @@ MANPAGES += \
man/sd_bus_path_encode.3 \
man/sd_bus_request_name.3 \
man/sd_event_add_child.3 \
+ man/sd_event_add_defer.3 \
man/sd_event_add_signal.3 \
man/sd_event_add_time.3 \
man/sd_event_new.3 \
@@ -802,6 +803,8 @@ MANPAGES_ALIAS += \
man/sd_bus_ref.3 \
man/sd_bus_release_name.3 \
man/sd_bus_unref.3 \
+ man/sd_event_add_exit.3 \
+ man/sd_event_add_post.3 \
man/sd_event_default.3 \
man/sd_event_ref.3 \
man/sd_event_source_get_child_pid.3 \
@@ -867,6 +870,8 @@ man/sd_bus_path_decode.3: man/sd_bus_path_encode.3
man/sd_bus_ref.3: man/sd_bus_new.3
man/sd_bus_release_name.3: man/sd_bus_request_name.3
man/sd_bus_unref.3: man/sd_bus_new.3
+man/sd_event_add_exit.3: man/sd_event_add_defer.3
+man/sd_event_add_post.3: man/sd_event_add_defer.3
man/sd_event_default.3: man/sd_event_new.3
man/sd_event_ref.3: man/sd_event_new.3
man/sd_event_source_get_child_pid.3: man/sd_event_add_child.3
@@ -1040,6 +1045,12 @@ man/sd_bus_release_name.html: man/sd_bus_request_name.html
man/sd_bus_unref.html: man/sd_bus_new.html
$(html-alias)
+man/sd_event_add_exit.html: man/sd_event_add_defer.html
+ $(html-alias)
+
+man/sd_event_add_post.html: man/sd_event_add_defer.html
+ $(html-alias)
+
man/sd_event_default.html: man/sd_event_new.html
$(html-alias)
@@ -1555,6 +1566,7 @@ EXTRA_DIST += \
man/sd_bus_path_encode.xml \
man/sd_bus_request_name.xml \
man/sd_event_add_child.xml \
+ man/sd_event_add_defer.xml \
man/sd_event_add_signal.xml \
man/sd_event_add_time.xml \
man/sd_event_new.xml \
diff --git a/man/sd_event_add_child.xml b/man/sd_event_add_child.xml
index a3b4d85ac8..f282a5094a 100644
--- a/man/sd_event_add_child.xml
+++ b/man/sd_event_add_child.xml
@@ -198,6 +198,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
<citerefentry><refentrytitle>sd_event_new</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_defer</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
diff --git a/man/sd_event_add_defer.xml b/man/sd_event_add_defer.xml
new file mode 100644
index 0000000000..6c937098b2
--- /dev/null
+++ b/man/sd_event_add_defer.xml
@@ -0,0 +1,191 @@
+<?xml version='1.0'?> <!--*-nxml-*-->
+<!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 2014 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/>.
+-->
+
+<refentry id="sd_event_add_defer" conditional="ENABLE_KDBUS">
+
+ <refentryinfo>
+ <title>sd_event_add_defer</title>
+ <productname>systemd</productname>
+
+ <authorgroup>
+ <author>
+ <contrib>More text</contrib>
+ <firstname>Zbigniew</firstname>
+ <surname>Jędrzejewski-Szmek</surname>
+ <email>zbyszek@in.waw.pl</email>
+ </author>
+ </authorgroup>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle>sd_event_add_defer</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd_event_add_defer</refname>
+ <refname>sd_event_add_post</refname>
+ <refname>sd_event_add_exit</refname>
+
+ <refpurpose>Add static event sources to an event loop</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
+
+ <funcprototype>
+ <funcdef>int <function>sd_event_add_defer</function></funcdef>
+ <paramdef>sd_event *<parameter>event</parameter></paramdef>
+ <paramdef>sd_event_source **<parameter>source</parameter></paramdef>
+ <paramdef>sd_event_handler_t <parameter>handler</parameter></paramdef>
+ <paramdef>void *<parameter>userdata</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_event_add_post</function></funcdef>
+ <paramdef>sd_event *<parameter>event</parameter></paramdef>
+ <paramdef>sd_event_source **<parameter>source</parameter></paramdef>
+ <paramdef>sd_event_handler_t <parameter>handler</parameter></paramdef>
+ <paramdef>void *<parameter>userdata</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_event_add_exit</function></funcdef>
+ <paramdef>sd_event *<parameter>event</parameter></paramdef>
+ <paramdef>sd_event_source **<parameter>source</parameter></paramdef>
+ <paramdef>sd_event_handler_t <parameter>handler</parameter></paramdef>
+ <paramdef>void *<parameter>userdata</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>typedef int (*<function>sd_event_handler_t</function>)</funcdef>
+ <paramdef>sd_event_source *<parameter>s</parameter></paramdef>
+ <paramdef>void *<parameter>userdata</parameter></paramdef>
+ </funcprototype>
+
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>Those three functions add new event sources to an event loop
+ object. The event loop is specified in
+ <parameter>event</parameter>, the event source is returned in the
+ <parameter>source</parameter> parameter. The event sources are
+ enabled statically and will "fire" when the event loop is run and
+ the conditions described below are met. The handler function will
+ be passed the <parameter>userdata</parameter> pointer, which may
+ be chosen freely by the caller.</para>
+
+ <para><function>sd_event_add_defer()</function> adds a new event
+ source that will "fire" the next time the event loop is run. By
+ default, the handler will be called once
+ (<constant>SD_EVENT_ONESHOT</constant>).</para>
+
+ <para><function>sd_event_add_defer()</function> adds a new event
+ source that will "fire" if any event handlers are invoked whenever
+ the event loop is run. By default, the source is enabled
+ permanently (<constant>SD_EVENT_ON</constant>).</para>
+
+ <para><function>sd_event_add_exit()</function> adds a new event
+ source that will "fire" when the event loop is terminated
+ with <function>sd_event_exit()</function>.</para>
+
+ <para>The
+ <citerefentry><refentrytitle>sd_event_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ function may be used to enable the event source permanently
+ (<constant>SD_EVENT_ON</constant>) or to make it fire just once
+ (<constant>SD_EVENT_ONESHOT</constant>). If the handler function
+ returns a negative error code, it will be disabled after the
+ invocation, even if <constant>SD_EVENT_ON</constant> mode is
+ set.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success, this functions return 0 or a positive
+ integer. On failure, they return a negative errno-style error
+ code.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Errors</title>
+
+ <para>Returned errors may indicate the following problems:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><varname>-ENOMEM</varname></term>
+
+ <listitem><para>Not enough memory to allocate an object.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>-EINVAL</varname></term>
+
+ <listitem><para>An invalid argument has been passed.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>-ESTALE</varname></term>
+
+ <listitem><para>The event loop is already terminated.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>-ECHILD</varname></term>
+
+ <listitem><para>The event loop has been created in a different process.</para></listitem>
+ </varlistentry>
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Notes</title>
+
+ <para>Functions described here are available as a shared library,
+ which can be compiled and linked to with the
+ <constant>libsystemd</constant> <citerefentry
+ project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ file.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_event_new</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_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
diff --git a/man/sd_event_add_signal.xml b/man/sd_event_add_signal.xml
index 2b656b67a2..1517c1021c 100644
--- a/man/sd_event_add_signal.xml
+++ b/man/sd_event_add_signal.xml
@@ -190,6 +190,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
<citerefentry><refentrytitle>sd_event_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_add_child</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_event_add_defer</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
diff --git a/man/sd_event_add_time.xml b/man/sd_event_add_time.xml
index e64ed8e207..f16b84f605 100644
--- a/man/sd_event_add_time.xml
+++ b/man/sd_event_add_time.xml
@@ -250,6 +250,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>.
<citerefentry><refentrytitle>sd_event_new</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_defer</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>clock_gettime</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_event_source_set_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>