sdk/2.1/docs/man/clEnqueueMarkerWithWaitList.xml

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<refentry>
    <refentryinfo>
        <keywordset>
            <keyword>clEnqueueMarkerWithWaitList</keyword>
        </keywordset>
    </refentryinfo>

    <refmeta>
        <refentrytitle>
            clEnqueueMarkerWithWaitList
        </refentrytitle>

        <refmiscinfo>
            <copyright>
                <year>2007-2013</year>
                <holder>The Khronos Group Inc.
 Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Materials, and to
permit persons to whom the Materials are furnished to do so, subject to
the condition that this copyright notice and permission notice shall be included
in all copies or substantial portions of the Materials.</holder>
            </copyright>
        </refmiscinfo>
        <manvolnum>3</manvolnum>
    </refmeta>

<!-- ================================ SYNOPSIS -->

    <refnamediv id="clEnqueueMarkerWithWaitList">
        <refname>
            clEnqueueMarkerWithWaitList
        </refname>

        <refpurpose>
            Enqueues a marker command which waits for either a list of events to complete,
            or all previously enqueued commands to complete.
        </refpurpose>
    </refnamediv>

    <refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>
                    <link xlink:href="scalarDataTypes.html">cl_int</link>
                    <function>clEnqueueMarkerWithWaitList</function>
                </funcdef>
                <paramdef>
                    <link xlink:href="abstractDataTypes.html">cl_command_queue</link>
                    <parameter>command_queue</parameter>
                </paramdef>
                <paramdef>
                    <link xlink:href="scalarDataTypes.html">cl_uint</link>
                    <parameter>num_events_in_wait_list</parameter>
                </paramdef>
                <paramdef>const
                    <link xlink:href="abstractDataTypes.html">cl_event</link>
                    <parameter>*event_wait_list</parameter>
                </paramdef>
                <paramdef>
                    <link xlink:href="abstractDataTypes.html">cl_event</link>
                    <parameter>*event</parameter>
                </paramdef>

            </funcprototype>
        </funcsynopsis>
    </refsynopsisdiv>

<!-- ================================ PARAMETERS -->

    <refsect1 id="parameters">
        <title>Parameters</title>
        <variablelist>
            <varlistentry>
                <term> <varname> command_queue </varname> </term>
                <listitem>
                    <para>
                        A valid host command-queue.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term>
                    <varname>
                        event_wait_list
                    </varname>
                    <varname>
                        num_events_in_wait_list
                    </varname>
                </term>

                <listitem>
                    <para>
                      These functions specify events that need to complete before this particular
                      command can be executed.
                    </para>

                    <para>
                      If <varname>event_wait_list</varname> is NULL,
                      <varname>num_events_in_wait_list</varname> must be 0. If
                      <varname>event_wait_list</varname> is not NULL, the list of events
                      pointed to by <varname>event_wait_list</varname> must be valid
                      and <varname>num_events_in_wait_list</varname> must be greater
                      than 0. The events specified in <varname>event_wait_list</varname>
                      act as synchronization points.  The context associated with events in
                      <varname>event_wait_list</varname> and <varname>command_queue</varname> must
                      be the same. The memory associated with <varname>event_wait_list</varname>
                      can be reused or freed after the function returns.
                    </para>

                    <para>
                      If <varname>event_wait_list</varname> is NULL, then this
                      particular command waits until all previous enqueued commands to
                      <varname>command_queue</varname> have completed.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term> <varname> event </varname> </term>
                <listitem>
                    <para>
                      Returns an event object that identifies this particular command.
                      Event objects are unique and can be used to identify this marker
                      command later on. <varname>event</varname> can be NULL in which case
                      it will not be possible for the application to query the status of
                      this command or queue a wait for this command to complete.  If the
                      <varname>event_wait_list</varname> and the <varname>event</varname>
                      arguments are not NULL, the <varname>event</varname> argument should not
                      refer to an element of the <varname>event_wait_list</varname> array.
                    </para>
               </listitem>
            </varlistentry>
        </variablelist>
    </refsect1>

<!-- ================================ DESCRIPTION  -->

    <refsect1 id="description"><title>Description</title>
        <para>
          Enqueues a marker command which waits for either a list of events to complete,
          or if the list is empty it waits for all commands previously enqueued in
          <varname>command_queue</varname> to complete before it completes. This command returns
          an event which can be waited on, i.e. this event can be waited on to insure that all
          events either in the <varname>event_wait_list</varname> or all previously enqueued
          commands, queued before this command to <varname>command_queue</varname>, have completed.
        </para>
    </refsect1>

<!-- ================================ ERRORS  -->

    <refsect1 id="errors"><title>Errors</title>
        <para>
          Returns <errorname>CL_SUCCESS</errorname> if the function executed successfully.
          Otherwise, it returns one of the following errors:
        </para>

        <itemizedlist mark="disc">
            <listitem>
              <errorname>CL_INVALID_COMMAND_QUEUE</errorname> if <varname>command_queue</varname>
              is not a valid host command-queue.
            </listitem>

            <listitem>
              <errorname>CL_INVALID_CONTEXT</errorname> if context 
                associated with <varname>command_queue</varname> and events in 
                <varname>event_wait_list</varname> are not the same.
            </listitem>

            <listitem>
              <errorname>CL_INVALID_EVENT_WAIT_LIST</errorname>
              if <varname>event_wait_list</varname> is NULL and
              <varname>num_events_in_wait_list</varname> > 0, or <varname>event_wait_list</varname>
              is not NULL and <varname>num_events_in_wait_list</varname> is 0, or if event
              objects in <varname>event_wait_list</varname> are not valid events.
            </listitem>

            <listitem>
              <errorname>CL_OUT_OF_RESOURCES</errorname> if there is a failure to allocate
              resources required by the OpenCL implementation on the device.
            </listitem>

            <listitem>
              <errorname>CL_OUT_OF_HOST_MEMORY</errorname> if there is a failure to allocate
              resources required by the OpenCL implementation on the host.
            </listitem>

        </itemizedlist>
    </refsect1>

<!-- ================================ EXAMPLE  -->
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    <refsect2 id="example1">
        <title>
            Example
        </title>

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                <colspec colname="col1" colnum="1" />
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                        <entry>
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                        </entry>
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<!-- ================================ SPECIFICATION  -->
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    <refsect1 id="specification"><title>Specification</title>
        <para>
            <imageobject>
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            </imageobject>


            <olink uri="clEnqueueMarkerWithWaitList">OpenCL Specification</olink>
        </para>
    </refsect1>

<!-- ================================ ALSO SEE  -->

    <refsect1 id="seealso"><title>Also see</title>
        <para>
            <citerefentry><refentrytitle>clWaitForEvents</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clEnqueueBarrierWithWaitList</refentrytitle></citerefentry>
        </para>
    </refsect1>

<!-- ================================ COPYRIGHT  -->
<!-- Content included from copyright.inc.xsl -->

    <refsect3 id="Copyright"><title></title>
        <imageobject>
                <imagedata fileref="KhronosLogo.jpg" format="jpg" />
        </imageobject>
        <para />
    </refsect3>

<!-- 25-Dec-2013, rev. 19 -->
</refentry>