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+<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:base="" xml:id="eglWaitSync">
+ <info>
+ <copyright>
+ <year>2018</year>
+ <holder>The Khronos Group Inc.</holder>
+ </copyright>
+ </info>
+ <refmeta>
+ <refentrytitle>eglWaitSync</refentrytitle>
+ <manvolnum>3G</manvolnum>
+ </refmeta>
+ <refnamediv>
+ <refname>eglWaitSync</refname>
+ <refpurpose>
+ Wait in the server for a sync object to be signalled
+ </refpurpose>
+ </refnamediv>
+ <refsynopsisdiv>
+ <title>C Specification</title>
+ <funcsynopsis>
+ <funcprototype>
+ <funcdef>EGLBoolean <function>eglWaitSync</function></funcdef>
+ <paramdef>(EGLDisplay <parameter>display</parameter></paramdef>
+ <paramdef>EGLSync <parameter>sync</parameter></paramdef>
+ <paramdef>EGLint <parameter>flags</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+ <refsect1 xml:id="parameters"><title>Parameters</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>display</parameter></term>
+ <listitem><para>
+ Specifies the <acronym>EGL</acronym> display connection.
+ </para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>sync</parameter></term>
+ <listitem><para>
+ Specifies the sync object to wait on.
+ </para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>flags</parameter></term>
+ <listitem><para>
+ Specifies flags controlling wait behavior.
+ </para></listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1 xml:id="description"><title>Description</title>
+ <para>
+ <function>eglWaitSync</function> is similar to
+ <function>eglClientWaitSync</function>, but instead of blocking
+ and not returning to the application until
+ <parameter>sync</parameter> is signaled,
+ <function>eglWaitSync</function> returns immediately. On
+ success, <constant>EGL_TRUE</constant> is returned, and the
+ server for the client API context will block until
+ <parameter>sync</parameter> is signaled.
+ </para>
+ <para>
+ Note: <function>eglWaitSync</function> allows applications to
+ continue to queue commands from the application in anticipation
+ of the sync being signaled, potentially increasing parallelism
+ between application, client API server code, and the GPU. The
+ server only blocks execution of commands for the specific
+ context on which <function>eglWaitSync</function> was issued;
+ other contexts implemented by the same server are not affected..
+ </para>
+ <para>
+ <parameter>sync</parameter> has the same meaning as for
+ <function>eglClientWaitSync</function>.
+ </para>
+ <para>
+ <parameter>flags</parameter> must be 0.
+ </para>
+ <para>
+ <function>eglWaitSync</function> requires support from the bound
+ client API, and will not succeed unless the same client API
+ properties described for creation of fence syncs in
+ <citerefentry><refentrytitle>eglCreateSync</refentrytitle></citerefentry>
+ are satisfied.
+ </para>
+ </refsect1>
+ <refsect1 xml:id="errors"><title>Errors</title>
+ <para>
+ <function>eglWaitSync</function> returns
+ <constant>EGL_FALSE</constant> on failure, and does not cause
+ the server for the client API context to block.
+ </para>
+ <para>
+ If the current context for the currently bound client API does
+ not support server waits, an <constant>EGL_BAD_MATCH</constant>
+ error is generated.
+ </para>
+ <para>
+ If no context is current for the currently bound client API
+ (i.e., <function>eglGetCurrentContext</function> returns
+ <constant>EGL_NO_CONTEXT</constant>), an
+ <constant>EGL_BAD_MATCH</constant> error is generated.
+ </para>
+ <para>
+ If <parameter>display</parameter> does not match the
+ <type>EGLDisplay</type> passed to
+ <function>eglCreateSync</function> when
+ <parameter>sync</parameter> was created, the behavior is
+ undefined.
+ </para>
+ <para>
+ If <parameter>sync</parameter> is not a valid sync object for
+ <parameter>display</parameter>, an
+ <constant>EGL_BAD_PARAMETER</constant> error is generated.
+ </para>
+ <para>
+ If <parameter>flags</parameter> is not 0, an
+ <constant>EGL_BAD_PARAMETER</constant> error is generated.
+ </para>
+ </refsect1>
+ <refsect1 xml:id="notes"><title>Notes</title>
+ <para>
+ <function>eglWaitSync</function> is available only if the EGL
+ version is 1.5 or greater.
+ </para>
+ </refsect1>
+ <refsect1 xml:id="seealso"><title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>eglClientWaitSync</refentrytitle></citerefentry>,
+ <citerefentry><refentrytitle>eglCreateSync</refentrytitle></citerefentry>,
+ <citerefentry><refentrytitle>eglGetCurrentContext</refentrytitle></citerefentry>
+ </para>
+ </refsect1>
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="copyright.xml"/>
+</refentry>