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50 lines
2.2 KiB
50 lines
2.2 KiB
4 months ago
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<?xml version='1.0' encoding='utf-8' ?>
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<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % BOOK_ENTITIES SYSTEM "Wayland.ent">
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<!ENTITY doxygen SYSTEM "ServerAPI.xml">
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%BOOK_ENTITIES;
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]>
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<appendix id="sect-Library-Server">
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<title>Server API</title>
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<section><title>Introduction</title>
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<para>
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The open-source reference implementation of Wayland protocol is
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split in two C libraries, <link
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linkend="sect-Library-Client">libwayland-client</link> and
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libwayland-server. Their main responsibility is to handle the
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Inter-process communication (<emphasis>IPC</emphasis>) with each
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other, therefore guaranteeing the protocol objects marshaling and
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messages synchronization.
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</para>
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<para>
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The server library is designed to work much like libwayland-client,
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although it is considerably complicated due to the server needing
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to support multiple versions of the protocol. It is best to learn
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libwayland-client first.
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</para>
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<para>
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Each open socket to a client is represented by a <link
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linkend="Server-structwl__client">wl_client</link>. The equivalent
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of the <link linkend="Client-classwl__proxy">wl_proxy</link> that
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libwayland-client uses to represent an object is <link
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linkend="Server-structwl__resource">wl_resource</link> for
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client-created objects, and <link
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linkend="Server-structwl__global">wl_global</link> for objects
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created by the server.
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</para>
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<para>
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Often a server is also a client for another Wayland server, and
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thus must link with both libwayland-client and libwayland-server.
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This produces some type name conflicts (such as the <link
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linkend="Client-classwl__display">client wl_display</link> and
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<link linkend="Server-structwl__display">server wl_display</link>,
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but the duplicate-but-not-the-same types are opaque, and accessed
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only inside the correct library where it came from. Naturally that
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means that the program writer needs to always know if a pointer to
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a wl_display is for the server or client side and use the
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corresponding functions.
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</para>
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</section>
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&doxygen;
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</appendix>
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