sdk/2.1/docs/man/clEnqueueCopyBuffer.xml

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<refentry>
    <refentryinfo>
        <keywordset>
            <keyword>clEnqueueCopyBuffer</keyword>
        </keywordset>
    </refentryinfo>

    <refmeta>
        <refentrytitle>
            clEnqueueCopyBuffer
        </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 -->
<!-- For each <funcprototype />, use <funcdef /> for the first part, with the function name
     set as <function /> and <paramdef /> for each or the parameters, plus <parameter /> for the
     actual parameter name. If you need multiple synopses, use separate <funcsynopsis /> sets.
-->

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

        <refpurpose>
            Enqueues a command to copy from one buffer object to another.
        </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>clEnqueueCopyBuffer </function>
                </funcdef>

                <paramdef><link xlink:href="abstractDataTypes.html">cl_command_queue</link><parameter>command_queue</parameter></paramdef>
                <paramdef><link xlink:href="abstractDataTypes.html">cl_mem</link><parameter>src_buffer</parameter></paramdef>
                <paramdef><link xlink:href="abstractDataTypes.html">cl_mem</link><parameter>dst_buffer</parameter></paramdef>
                <paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>src_offset</parameter></paramdef>
                <paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>dst_offset</parameter></paramdef>
                <paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>size</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 -->
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     <listitem /><para />. When refering to anything
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-->
    <refsect1 id="parameters">
        <title>Parameters</title>
        <variablelist>
            <varlistentry>
                <term> <varname> command_queue </varname> </term>
                <listitem>
                    <para>
                      The host command-queue in which the copy command will be queued. The
                      OpenCL context associated with <varname>command_queue</varname>,
                      <varname>src_buffer</varname>, and <varname>dst_buffer</varname> must be
                      the same.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term> <varname> src_offset </varname> </term>
                <listitem>
                    <para>
                        The offset where to begin copying data from <varname>src_buffer</varname>.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term> <varname> dst_offset </varname> </term>
                <listitem>
                    <para>
                        The offset where to begin copying data into <varname>dst_buffer</varname>.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term> <varname>size</varname> </term>
                <listitem>
                    <para>
                        Refers to the size in bytes to copy.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term>
                    <varname>
                        event_wait_list
                    </varname>
                </term>
                <term>
                    <varname>
                        num_events_in_wait_list
                    </varname>
                </term>
                <listitem>
                    <para>
                      Specify events that need to complete before this particular
                      command can be executed. If <varname>event_wait_list</varname>
                      is NULL, then this particular command does not wait on any
                      event to complete. 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>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term> <varname> event </varname> </term>
                <listitem>
                    <para>
                      Returns an event object that identifies this particular copy command
                      and can be used to query or queue a wait for this particular
                      command to complete.  <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.
                      <citerefentry><refentrytitle>clEnqueueBarrierWithWaitList</refentrytitle></citerefentry>
                      can be used instead.  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>

<!-- ================================ NOTES  -->


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

    <refsect1 id="errors"><title>Errors</title>
        <para>
          Returns <errorname>CL_SUCCESS</errorname> if the function is 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 the context associated
              with <varname>command_queue</varname>, <varname>src_buffer</varname>, and
              <varname>dst_buffer</varname> are not the same or if the context associated with
              <varname>command_queue</varname> and events in <varname>event_wait_list</varname>
              are not the same.
            </listitem>

            <listitem>
              <errorname>CL_INVALID_MEM_OBJECT</errorname> if <varname>src_buffer</varname>
              and <varname>dst_buffer</varname> are not valid buffer objects.
            </listitem>

            <listitem>
              <errorname>CL_INVALID_VALUE</errorname> if <varname>src_offset</varname>,
              <varname>dst_offset</varname>, <varname>size</varname>, <varname>src_offset</varname>
              + <varname>size</varname>, or <varname>dst_offset</varname> + <varname>size</varname>
              require accessing elements outside the <varname>src_buffer</varname> and
              <varname>dst_buffer</varname> buffer objects respectively.
            </listitem>

            <listitem>
                <errorname>CL_INVALID_VALUE</errorname> if <varname>size</varname> is 0.
            </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> is &gt;
              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_MISALIGNED_SUB_BUFFER_OFFSET </errorname> if
              <varname>src_buffer</varname> is a sub-buffer object and <varname>offset</varname>
              specified when the sub-buffer object is created is not aligned to
              <constant>CL_DEVICE_MEM_BASE_ADDR_ALIGN</constant> value for device associated
              with <varname>queue</varname>.
            </listitem>

            <listitem>
              <errorname>CL_MISALIGNED_SUB_BUFFER_OFFSET </errorname> if
              <varname>dst_buffer</varname> is a sub-buffer object and <varname>offset</varname>
              specified when the sub-buffer object is created is not aligned to
              <constant>CL_DEVICE_MEM_BASE_ADDR_ALIGN</constant> value for device associated
              with <varname>queue</varname>.
            </listitem>

            <listitem>
              <errorname>CL_MEM_COPY_OVERLAP</errorname> if <varname>src_buffer</varname>
              and <varname>dst_buffer</varname> are the same buffer or subbuffer object and
              the source and destination regions overlap or if <varname>src_buffer</varname>
              and <varname>dst_buffer</varname> are different sub-buffers of the same associated
              buffer object and they overlap. The regions overlap if <varname>src_offset</varname>
              &le; <varname>dst_offset</varname> &le; <varname>src_offset</varname> + size -
              1, or if <varname>dst_offset</varname> &le; <varname>src_offset</varname> &le;
              <varname>dst_offset</varname> + size - 1.
            </listitem>

            <listitem>
              <errorname>CL_MEM_OBJECT_ALLOCATION_FAILURE</errorname> if there is a failure
              to allocate memory for data store associated with <varname>src_buffer</varname>
              or <varname>dst_buffer</varname>.
            </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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<!-- ================================ SPECIFICATION  -->
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    <refsect1 id="specification"><title>Specification</title>
        <para>
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                <imagedata fileref="pdficon_small1.gif" format="gif" />
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            <olink uri="clEnqueueCopyBuffer">OpenCL Specification</olink>
        </para>
    </refsect1>

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

    <refsect1 id="seealso"><title>Also see</title>
        <para>
            <citerefentry><refentrytitle>clEnqueueReadBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clEnqueueWriteBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clCreateBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clCreateSubBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clEnqueueCopyBufferToImage</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clEnqueueCopyImageToBuffer</refentrytitle></citerefentry>
        </para>
    </refsect1>

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

 <!-- 22-Oct-2015, API rev. 19 -->
</refentry>