man/sd_event_source_get_event.xml

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   6   SPDX-License-Identifier: LGPL-2.1+
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   8
   9 <refentry id="sd_event_source_get_event" xmlns:xi="http://www.w3.org/2001/XInclude">
  10
  11   <refentryinfo>
  12     <title>sd_event_source_get_event</title>
  13     <productname>systemd</productname>
  14
  15     <authorgroup>
  16       <author>
  17         <contrib>Developer</contrib>
  18         <firstname>Lennart</firstname>
  19         <surname>Poettering</surname>
  20         <email>lennart@poettering.net</email>
  21       </author>
  22     </authorgroup>
  23   </refentryinfo>
  24
  25   <refmeta>
  26     <refentrytitle>sd_event_source_get_event</refentrytitle>
  27     <manvolnum>3</manvolnum>
  28   </refmeta>
  29
  30   <refnamediv>
  31     <refname>sd_event_source_get_event</refname>
  32
  33     <refpurpose>Retrieve the event loop of an event source</refpurpose>
  34   </refnamediv>
  35
  36   <refsynopsisdiv>
  37     <funcsynopsis>
  38       <funcsynopsisinfo>#include &lt;systemd/sd-event.h&gt;</funcsynopsisinfo>
  39
  40       <funcprototype>
  41         <funcdef>sd_event* <function>sd_event_source_get_event</function></funcdef>
  42         <paramdef>sd_event_source *<parameter>source</parameter></paramdef>
  43       </funcprototype>
  44
  45     </funcsynopsis>
  46   </refsynopsisdiv>
  47
  48   <refsect1>
  49     <title>Description</title>
  50
  51     <para><function>sd_event_source_get_event()</function> may be used
  52     to retrieve the event loop object the event source object specified
  53     as <parameter>source</parameter> is associated with. The event
  54     loop object is specified when creating an event source object with
  55     calls such as
  56     <citerefentry><refentrytitle>sd_event_add_io</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  57     or
  58     <citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
  59   </refsect1>
  60
  61   <refsect1>
  62     <title>Return Value</title>
  63
  64     <para>On success, <function>sd_event_source_get_event()</function>
  65     returns the associated event loop object. On failure, it returns
  66     NULL.</para>
  67   </refsect1>
  68
  69   <xi:include href="libsystemd-pkgconfig.xml" />
  70
  71   <refsect1>
  72     <title>See Also</title>
  73
  74     <para>
  75       <citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  76       <citerefentry><refentrytitle>sd_event_add_io</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  77       <citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  78       <citerefentry><refentrytitle>sd_event_add_child</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  79       <citerefentry><refentrytitle>sd_event_add_signal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  80       <citerefentry><refentrytitle>sd_event_add_defer</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
  81       <citerefentry><refentrytitle>sd_event_source_set_userdata</refentrytitle><manvolnum>3</manvolnum></citerefentry>
  82     </para>
  83   </refsect1>
  84
  85 </refentry>