mirror of
https://github.com/systemd/systemd
synced 2024-10-15 12:34:37 +00:00
0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
128 lines
5 KiB
XML
128 lines
5 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
|
|
<!--
|
|
SPDX-License-Identifier: LGPL-2.1+
|
|
-->
|
|
|
|
<refentry id="sd_event_source_unref" xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>sd_event_source_unref</title>
|
|
<productname>systemd</productname>
|
|
|
|
<authorgroup>
|
|
<author>
|
|
<contrib>Developer</contrib>
|
|
<firstname>Lennart</firstname>
|
|
<surname>Poettering</surname>
|
|
<email>lennart@poettering.net</email>
|
|
</author>
|
|
</authorgroup>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>sd_event_source_unref</refentrytitle>
|
|
<manvolnum>3</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>sd_event_source_unref</refname>
|
|
<refname>sd_event_source_unrefp</refname>
|
|
<refname>sd_event_source_ref</refname>
|
|
|
|
<refpurpose>Increase or decrease event source reference counters</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<funcsynopsis>
|
|
<funcsynopsisinfo>#include <systemd/sd-event.h></funcsynopsisinfo>
|
|
|
|
<funcprototype>
|
|
<funcdef>sd_event_source* <function>sd_event_source_unref</function></funcdef>
|
|
<paramdef>sd_event_source *<parameter>source</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>void <function>sd_event_source_unrefp</function></funcdef>
|
|
<paramdef>sd_event_source **<parameter>source</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>sd_event_source* <function>sd_event_source_ref</function></funcdef>
|
|
<paramdef>sd_event_source *<parameter>source</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><function>sd_event_source_unref()</function> may be used to
|
|
decrement by one the reference counter of the event source object
|
|
specified as <parameter>source</parameter>. The reference counter
|
|
is initially set to one, when the event source is created with calls
|
|
such as
|
|
<citerefentry><refentrytitle>sd_event_add_io</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
or
|
|
<citerefentry><refentrytitle>sd_event_add_time</refentrytitle><manvolnum>3</manvolnum></citerefentry>. When
|
|
the reference counter reaches zero it is removed from its event loop
|
|
object and destroyed.</para>
|
|
|
|
<para><function>sd_event_source_unrefp()</function> is similar to
|
|
<function>sd_event_source_unref()</function> but takes a pointer to a
|
|
pointer to an <type>sd_event_source</type> object. This call is useful in
|
|
conjunction with GCC's and LLVM's <ulink
|
|
url="https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html">Clean-up
|
|
Variable Attribute</ulink>. Note that this function is defined as
|
|
inline function.</para>
|
|
|
|
<para><function>sd_event_source_ref()</function> may be used
|
|
to increase by one the reference counter of the event source object
|
|
specified as <parameter>source</parameter>.</para>
|
|
|
|
<para><function>sd_event_source_unref()</function>,
|
|
<function>sd_bus_creds_unrefp()</function> and
|
|
<function>sd_bus_creds_ref()</function> execute no operation if
|
|
the passed event source object is
|
|
<constant>NULL</constant>.</para>
|
|
|
|
<para>Note that event source objects stay alive and may be
|
|
dispatched as long as they have a reference counter greater than
|
|
zero. In order to drop a reference of an event source and make
|
|
sure the associated event source handler function is not called
|
|
anymore it is recommended to combine a call of
|
|
<function>sd_event_source_unref()</function> with a prior call to
|
|
<function>sd_event_source_set_enabled()</function> with
|
|
<constant>SD_EVENT_OFF</constant>.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Return Value</title>
|
|
|
|
<para><function>sd_event_source_unref()</function> always returns
|
|
<constant>NULL</constant>.
|
|
<function>sd_event_source_ref()</function> always returns the
|
|
event source object passed in.</para>
|
|
</refsect1>
|
|
|
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<para>
|
|
<citerefentry><refentrytitle>sd-event</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
|
<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_child</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>
|
|
|
|
</refentry>
|