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<!ENTITY clCreate_memflagsInc SYSTEM "clCreate_memflagsInc.xml">
]>

<refentry>
    <refentryinfo>clCreateBuffer
        <keywordset>
            <keyword>clCreateBuffer</keyword>
        </keywordset>
    </refentryinfo>

    <refmeta>
        <refentrytitle>
            clCreateBuffer
        </refentrytitle>

        <refmiscinfo>
            <copyright>
                <year>2007-2011</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="clCreateBuffer">
        <refname>
            clCreateBuffer
        </refname>

        <refpurpose>
            Creates a buffer object.
        </refpurpose>
    </refnamediv>

    <refsynopsisdiv xmlns:xlink="http://www.w3.org/1999/xlink"><title></title>
        <funcsynopsis>
            <funcprototype>
                <funcdef>
                    <link xlink:href="abstractDataTypes.html">cl_mem</link> <function>clCreateBuffer</function>
                </funcdef>

                <paramdef><link xlink:href="abstractDataTypes.html">cl_context</link><parameter>context</parameter></paramdef>
                <paramdef><link xlink:href="enums.html#cl_mem_flags">cl_mem_flags</link><parameter>flags</parameter></paramdef>
                <paramdef><link xlink:href="scalarDataTypes.html">size_t</link><parameter>size</parameter></paramdef>
                <paramdef><link xlink:href="scalarDataTypes.html">void</link><parameter>*host_ptr</parameter></paramdef>
                <paramdef><link xlink:href="scalarDataTypes.html">cl_int</link><parameter>*errcode_ret</parameter></paramdef>

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

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

    <refsect1 id="parameters">
        <title>Parameters</title>
        <variablelist>

            <varlistentry>
                <term><varname>context</varname></term>
                <listitem>
                    <para>A valid OpenCL context used to create the buffer object.</para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term> <varname>flags</varname> </term>
                <listitem>
                    <para>
                      <!-- parameter description --> A bit-field that is used to specify
                      allocation and usage information such as the memory arena that should be
                      used to allocate the buffer object and how it will be used. The following
                      table describes the possible values for <varname>flags</varname>. If
                      value specified for <varname>flags</varname> is 0, the default is used
                      which is <constant>CL_MEM_READ_WRITE</constant>.
                    </para>

                    &clCreate_memflagsInc;

                </listitem>
            </varlistentry>

            <!-- END PARAMETER TABLE  -->

            <varlistentry>
                <term><varname>size</varname></term>
                <listitem>
                    <para>The size in bytes of the buffer memory object to be allocated.</para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term><varname>host_ptr</varname></term>
                <listitem>
                    <para>
                      <!-- parameter description --> A pointer to the buffer data that may
                      already be allocated by the application. The size of the buffer that
                      <varname>host_ptr</varname> points to must be &ge; <varname>size</varname>
                      bytes.
                    </para>
               </listitem>
            </varlistentry>

            <varlistentry>
                <term><varname>errcode_ret</varname></term>
                <listitem>
                    <para>
                      <!-- parameter description --> Returns an appropriate error code. If
                      <varname>errcode_ret</varname> is NULL, no error code is returned.
                    </para>
               </listitem>
            </varlistentry>
        </variablelist>
    </refsect1>

<!-- ================================ NOTES  -->
<!--    <refsect1 id="notes"><title>Notes</title>
        <para>
        </para>
    </refsect1> -->

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

    <refsect1 id="errors"><title>Errors</title>
        <para>
          Returns a valid non-zero buffer object and <varname>errcode_ret</varname>
          is set to <errorname>CL_SUCCESS</errorname> if the buffer object is created
          successfully. Otherwise, it returns a NULL value with one of the following error
          values returned in <varname>errcode_ret</varname>:
        </para>

        <itemizedlist mark="disc">
            <listitem>
              <errorname>CL_INVALID_CONTEXT</errorname> if <varname>context</varname> is not
              a valid context.
            </listitem>

            <listitem>
              <errorname>CL_INVALID_VALUE</errorname> if values specified in
              <varname>flags</varname> are not valid as defined in the table above.
            </listitem>

            <listitem>
                <errorname>CL_INVALID_BUFFER_SIZE</errorname> if <varname>size</varname> is 0.
                <para>
                  Implementations may return <constant>CL_INVALID_BUFFER_SIZE</constant> if size
                  is greater than the <constant>CL_DEVICE_MAX_MEM_ALLOC_SIZE</constant> value
                  specified in the table of allowed values for <varname>param_name</varname>
                  for <citerefentry><refentrytitle>clGetDeviceInfo</refentrytitle></citerefentry>
                  for all devices in context.
                </para>
            </listitem>

            <listitem>
              <errorname>CL_INVALID_HOST_PTR</errorname> if <varname>host_ptr</varname>
              is NULL and <constant>CL_MEM_USE_HOST_PTR</constant> or
              <constant>CL_MEM_COPY_HOST_PTR</constant> are set in <varname>flags</varname> or if
              <varname>host_ptr</varname> is not NULL but <constant>CL_MEM_COPY_HOST_PTR</constant>
              or <constant>CL_MEM_USE_HOST_PTR</constant> are not set in <varname>flags</varname>.
            </listitem>

            <listitem>
              <errorname>CL_MEM_OBJECT_ALLOCATION_FAILURE</errorname> if there is a failure to
              allocate memory for buffer object.
            </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  -->
<!-- DO NOT DELETE IN CASE AN EXAMPLE IS ADDED IN THE FUTURE -->
<!--
    <refsect2 id="example1">
        <title>
            Example
        </title>

        <informaltable frame="none">
            <tgroup cols="1" align="left" colsep="0" rowsep="0">
                <colspec colname="col1" colnum="1" />
                <tbody>
                    <row>
                        <entry>
                            Example goes here - it will be set in "code" type with white space preserved.
                        </entry>
                    </row>
                </tbody>
            </tgroup>
        </informaltable>
    </refsect2>
-->

<!-- ================================ SPECIFICATION  -->
<!-- Set the "uri" attribute in the <olink /> element to the "named destination" for the PDF page
-->
    <refsect1 id="specification"><title>Specification</title>
        <para>
            <imageobject>
                <imagedata fileref="pdficon_small1.gif" format="gif" />
            </imageobject>

            <olink uri="clCreateBuffer">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>clEnqueueCopyBuffer</refentrytitle></citerefentry>,
            <citerefentry><refentrytitle>clCreateSubBuffer</refentrytitle></citerefentry>,
            <citerefentry href="classDiagram"><refentrytitle>Cardinality Diagram</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>

<!-- 23-Oct-2011 -->
</refentry>