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<refentry id="glGetSync">
    <refmeta>
        <refmetainfo>
            <copyright>
                <year>2010</year>
                <holder>Khronos Group</holder>
            </copyright>
        </refmetainfo>
        <refentrytitle>glGetSynciv</refentrytitle>
        <manvolnum>3G</manvolnum>
    </refmeta>
    <refnamediv>
        <refname>glGetSynciv</refname>
        <refpurpose>query the properties of a sync object</refpurpose>
    </refnamediv>
    <refsynopsisdiv><title>C Specification</title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>void <function>glGetSynciv</function></funcdef>
                <paramdef>GLsync <parameter>sync</parameter></paramdef>
                <paramdef>GLenum <parameter>pname</parameter></paramdef>
                <paramdef>GLsizei <parameter>bufSize</parameter></paramdef>
                <paramdef>GLsizei *<parameter>length</parameter></paramdef>
                <paramdef>GLint *<parameter>values</parameter></paramdef>
            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>
    <!-- eqn: ignoring delim $$ -->
    <refsect1 id="parameters"><title>Parameters</title>
        <variablelist>
        <varlistentry>
            <term><parameter>sync</parameter></term>
            <listitem>
                <para>
                    Specifies the sync object whose properties to query.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>pname</parameter></term>
            <listitem>
                <para>
                    Specifies the parameter whose value to retrieve from the sync object specified in <parameter>sync</parameter>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>bufSize</parameter></term>
            <listitem>
                <para>
                    Specifies the size of the buffer whose address is given in <parameter>values</parameter>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>length</parameter></term>
            <listitem>
                <para>
                    Specifies the address of an variable to receive the number of integers placed in <parameter>values</parameter>.
                </para>
            </listitem>
        </varlistentry>
        <varlistentry>
            <term><parameter>values</parameter></term>
            <listitem>
                <para>
                    Specifies the address of an array to receive the values of the queried parameter.
                </para>
            </listitem>
        </varlistentry>
        </variablelist>
    </refsect1>
    <refsect1 id="description"><title>Description</title>
        <para>
            <function>glGetSynciv</function> retrieves properties of a sync object. <parameter>sync</parameter> specifies the name of the sync
            object whose properties to retrieve.
        </para>
        <para>
            On success, <function>glGetSynciv</function> replaces up to <parameter>bufSize</parameter> integers in <parameter>values</parameter> with the
            corresponding property values of the object being queried.  The actual number of integers replaced is returned in the variable whose address is
            specified in <parameter>length</parameter>. If <parameter>length</parameter> is <code>NULL</code>, no length is returned.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_OBJECT_TYPE</constant>, a single value representing the specific type of the sync object is
            placed in <parameter>values</parameter>. The only type supported is <constant>GL_SYNC_FENCE</constant>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_SYNC_STATUS</constant>, a single value representing the status of the sync object
            (<constant>GL_SIGNALED</constant> or <constant>GL_UNSIGNALED</constant>) is placed in <parameter>values</parameter>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_SYNC_CONDITION</constant>, a single value representing the condition of the sync object
            is placed in <parameter>values</parameter>. The only condition supported is <constant>GL_SYNC_GPU_COMMANDS_COMPLETE</constant>.
        </para>
        <para>
            If <parameter>pname</parameter> is <constant>GL_SYNC_FLAGS</constant>, a single value representing the flags with which the sync object
            was created is placed in <parameter>values</parameter>. No flags are currently supported<footnote><para><parameter>flags</parameter> is
            expected to be used in future extensions to the sync objects.</para></footnote>.
        </para>
        <para>
            If an error occurs, nothing will be written to <parameter>values</parameter> or <parameter>length</parameter>.
        </para>
    </refsect1>
    <refsect1 id="errors"><title>Errors</title>
        <para>
            <constant>GL_INVALID_VALUE</constant> is generated if <parameter>sync</parameter> is not the name of a sync object.
        </para>
        <para>
            <constant>GL_INVALID_ENUM</constant> is generated if <parameter>pname</parameter> is not one of the accepted tokens.
        </para>
    </refsect1>
    <refsect1 id="seealso"><title>See Also</title>
        <para>
            <citerefentry><refentrytitle>glFenceSync</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glWaitSync</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>glClientWaitSync</refentrytitle></citerefentry>
        </para>
    </refsect1>
    <refsect1 id="Copyright"><title>Copyright</title>
        <para>
            Copyright <trademark class="copyright"></trademark> 2010 Khronos Group. 
            This material may be distributed subject to the terms and conditions set forth in 
            the Open Publication License, v 1.0, 8 June 1999.
            <ulink url="http://opencontent.org/openpub/">http://opencontent.org/openpub/</ulink>.
        </para>
    </refsect1>
</refentry>
