single receiver). It's behavior is similar to calling
<citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>
followed by calling <function>sd_bus_send()</function>.</para>
+
+ <para><function>sd_bus_send()</function>/<function>sd_bus_send_to()</function> will write the message
+ directly to the underlying transport (e.g. kernel socket buffer) if possible. If the connection is not
+ set up fully yet the message is queued locally. If the transport buffers are congested any unwritten
+ message data is queued locally, too. If the connection has been closed or is currently being closed the
+ call fails.
+ <citerefentry><refentrytitle>sd_bus_process</refentrytitle><manvolnum>3</manvolnum></citerefentry> should
+ be invoked to write out any queued message data to the transport.</para>
</refsect1>
<refsect1>
<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_bus_call_method</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_bus_message_set_destination</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_bus_reply_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>sd_bus_reply_method_return</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_bus_process</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>