| <?xml version="1.0" encoding="UTF-8"?> |
| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> |
| <!-- saved from url=(0013)about:internet --> |
| <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" xmlns:xlink="http://www.w3.org/1999/xlink" pref:renderer="mathplayer-dl"> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> |
| <style xmlns="" type="text/css"> |
| /* This style sets a margin around the entire page */ |
| html, body { |
| margin: 10px; |
| } |
| |
| p { |
| font: normal 16px verdana, sans-serif; |
| margin: 0; |
| padding-bottom:12px; |
| } |
| |
| h1 { |
| font: bold 25px verdana, sans-serif; |
| margin-top: 0; |
| margin-bottom: 3px; |
| padding-top: 0; |
| padding-bottom: 0; |
| } |
| |
| h2 { |
| font: bold 19px verdana, sans-serif; |
| margin-top: 28px; |
| margin-bottom: 3px; |
| padding-top: 0; |
| padding-bottom: 0; |
| } |
| |
| h3 { |
| font: bold 19px verdana, sans-serif !important; |
| margin-top: 28px; |
| margin-bottom: 3px; |
| padding-top: 0; |
| padding-bottom: 0; |
| } |
| |
| li { |
| font: normal 16px verdana, sans-serif; |
| margin-top: 0; |
| margin-bottom: 18px; |
| padding-top: 0; |
| padding-bottom: 0; |
| } |
| |
| .pdparam { |
| font: italic 16px verdana, sans-serif; |
| } |
| |
| .term { |
| font: italic 16px verdana, sans-serif; |
| font-weight: normal; |
| } |
| |
| .type { |
| font: normal 16px verdana, sans-serif !important; |
| } |
| |
| .parameter { |
| font-style: italic; |
| } |
| |
| a:link, a:visited { |
| color: blue; |
| text-decoration: none; |
| font: normal 16px; |
| } |
| |
| a:hover { |
| background-color: #FFFF99; |
| font: normal 16px; |
| } |
| |
| div.funcsynopsis { |
| text-align: left; |
| background-color: #e6e6e6; |
| font: normal 16px verdana, sans-serif; |
| padding-top: 10px; |
| padding-bottom: 10px; |
| } |
| |
| div.funcsynopsis table { |
| border-collapse: separate; |
| font: normal 16px verdana, sans-serif; |
| } |
| |
| div.funcsynopsis td { |
| background-color: #e6e6e6; |
| border: 0 solid #000; |
| padding: 1px; |
| font: normal 16px verdana, sans-serif; |
| } |
| |
| div.refsect1 { |
| font-family: verdana, sans-serif; |
| font-size: 16px; |
| } |
| |
| code.constant { |
| font: normal 16px courier new, monospace !important; |
| } |
| |
| span.errorname { |
| font: normal 16px verdana, sans-serif !important; |
| } |
| |
| code.function { |
| font: bold 16px verdana, sans-serif !important; |
| } |
| |
| b.fsfunc { |
| font: bold 16px verdana, sans-serif !important; |
| } |
| |
| code.varname { |
| font: italic 16px verdana, sans-serif; |
| } |
| |
| code.replaceable { |
| font: italic 16px courier new, monospace; |
| } |
| |
| code.funcdef { |
| font: normal 16px verdana, sans-serif !important; |
| } |
| |
| .citerefentry { |
| font: normal 16px verdana, sans-serif !important; |
| } |
| |
| .parameter { |
| font-style: italic; |
| } |
| |
| code.fsfunc { |
| font: normal 16px verdana, sans-serif !important; |
| } |
| |
| /* PARAMETER: This style controls spacing between the terms in Parameter section */ |
| dt { |
| margin-top: 15px; |
| } |
| |
| /* TABLES: These styles apply to all tables OTHER than the Synopsis and Example tables */ |
| div.refsect1 table { |
| width: 100%; |
| margin-top: 10px; |
| background-color: #FFF; |
| border-collapse: collapse; |
| border-color: #000; |
| border-width: 1px; |
| font: normal 16px verdana, sans-serif; |
| } |
| |
| div.refsect1 th { |
| border-collapse: collapse; |
| border-color: #000; |
| border-width: 1px; |
| font: bold 16px verdana, sans-serif; |
| } |
| |
| div.refsect1 td { |
| background-color: #FFF; |
| padding: 5px; |
| vertical-align: text-top; |
| border-collapse: collapse; |
| border-color: #000; |
| border-width: 1px; |
| font: normal 16px verdana, sans-serif; |
| } |
| |
| div.refsect1 p{ |
| font: normal 16px verdana, sans-serif; |
| margin-top: 8px; |
| margin-bottom: 8px; |
| padding-top: 0; |
| padding-bottom: 0; |
| } |
| |
| |
| /* EXAMPLE: These styles apply only to the Example section */ |
| div.refsect2 { |
| font: normal 16px courier new, monospace !important; |
| } |
| |
| div.refsect2 table { |
| margin-top: 0; |
| background-color: #e6e6e6; |
| width: 100%; |
| border: 0 solid #000; |
| padding: 2px; |
| font: normal 16px courier new, monospace !important; |
| } |
| |
| div.refsect2 td { |
| background-color: #e6e6e6; |
| font: normal 16px courier new, monospace !important; |
| white-space:pre; |
| } |
| |
| /* COPYRIGHT: This style formats the text of the copyright statement at the bottom of the page */ |
| div.refsect3 { |
| font: normal 11px verdana, sans-serif; |
| margin-top: 50px; |
| margin-bottom: 20px; |
| padding-top: 0; |
| padding-bottom: 0; |
| } |
| |
| </style> |
| <title>clCreateBuffer</title> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.75.1" /> |
| <meta name="keywords" content=" clCreateBuffer " /> |
| </head> |
| <body> |
| <div class="refentry" title="clCreateBuffer"> |
| <a id="id2900118"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="clCreateBuffer"></a> |
| <h1> |
| clCreateBuffer |
| </h1> |
| <p> |
| Creates a buffer object. |
| </p> |
| </div> |
| <div class="refsynopsisdiv"> |
| <h2></h2> |
| <div class="funcsynopsis"> |
| <table xmlns="" border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"> |
| <tr valign="bottom"> |
| <td> |
| <code xmlns="http://www.w3.org/1999/xhtml" class="funcdef"> |
| cl_mem <b class="fsfunc">clCreateBuffer</b> |
| (</code> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="abstractDataTypes.html" target="_top">cl_context</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">context</var>, </td> |
| </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="enums.html#cl_mem_flags" target="_top">cl_mem_flags</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">flags</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">size_t</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">size</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">void</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*host_ptr</var>, </td> |
| </tr> |
| <tr valign="top"> |
| <td> </td> |
| <td><a xmlns="http://www.w3.org/1999/xhtml" class="link" href="scalarDataTypes.html" target="_top">cl_int</a> <var xmlns="http://www.w3.org/1999/xhtml" class="pdparam">*errcode_ret</var><code>)</code></td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1" title="Parameters"> |
| <a id="parameters"></a> |
| <h2>Parameters</h2> |
| <div class="variablelist"> |
| <dl> |
| <dt> |
| <span class="term"> |
| <code class="varname">context</code> |
| </span> |
| </dt> |
| <dd> |
| <p>A valid OpenCL context used to create the buffer object.</p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">flags</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| 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 <code class="varname">flags</code>: |
| </p> |
| <div class="informaltable"> |
| <table border="1"> |
| <colgroup> |
| <col align="left" /> |
| <col /> |
| </colgroup> |
| <thead> |
| <tr> |
| <th align="left">cl_mem_flags</th> |
| <th align="left">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_READ_WRITE</code> |
| </td> |
| <td align="left"> |
| This flag specifies that the memory object will be read and |
| written by a kernel. This is the default. |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_WRITE_ONLY</code> |
| </td> |
| <td align="left"> |
| <p>This flags specifies that the memory object will be written |
| but not read by a kernel.</p> |
| <p>Reading from a buffer or image object created with |
| <code class="constant">CL_MEM_WRITE_ONLY</code> inside a kernel is undefined.</p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_READ_ONLY</code> |
| </td> |
| <td align="left"> |
| <p>This flag specifies that the memory object is a read-only |
| memory object when used inside a kernel.</p> |
| <p>Writing to a buffer or image object created with |
| <code class="constant">CL_MEM_READ_ONLY</code> inside a kernel is undefined.</p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_USE_HOST_PTR</code> |
| </td> |
| <td align="left"> |
| <p>This flag is valid only if <code class="varname">host_ptr</code> is not NULL. If |
| specified, it indicates that the application wants the |
| OpenCL implementation to use memory referenced by |
| <code class="varname">host_ptr</code> as the storage bits for the memory object.</p> |
| <p>OpenCL implementations are allowed to cache the buffer |
| contents pointed to by <code class="varname">host_ptr</code> in device memory. This |
| cached copy can be used when kernels are executed on a |
| device.</p> |
| <p>The result of OpenCL commands that operate on multiple |
| buffer objects created with the same <code class="varname">host_ptr</code> or |
| overlapping host regions is considered to be undefined.</p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_ALLOC_HOST_PTR</code> |
| </td> |
| <td align="left"> |
| <p>This flag specifies that the application wants the OpenCL |
| implementation to allocate memory from host accessible |
| memory.</p> |
| <p> |
| <code class="constant">CL_MEM_ALLOC_HOST_PTR</code> and |
| <code class="constant">CL_MEM_USE_HOST_PTR</code> are mutually exclusive.</p> |
| </td> |
| </tr> |
| <tr> |
| <td align="left"> |
| <code class="constant">CL_MEM_COPY_HOST_PTR</code> |
| </td> |
| <td align="left"> |
| <p> |
| This flag is valid only if <code class="varname">host_ptr</code> is not NULL. If |
| specified, it indicates that the application wants the |
| OpenCL implementation to allocate memory for the |
| memory object and copy the data from memory referenced |
| by <code class="varname">host_ptr</code>. |
| </p> |
| <p> |
| <code class="constant">CL_MEM_COPY_HOST_PTR</code> and |
| <code class="constant">CL_MEM_USE_HOST_PTR</code> are mutually exclusive. |
| </p> |
| <p> |
| <code class="constant">CL_MEM_COPY_HOST_PTR</code> can be used with |
| <code class="constant">CL_MEM_ALLOC_HOST_PTR</code> to initialize the contents of |
| the cl_mem object allocated using host-accessible (e.g. |
| PCIe) memory. |
| </p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">size</code> |
| </span> |
| </dt> |
| <dd> |
| <p>The size in bytes of the buffer memory object to be allocated.</p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">host_ptr</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| A pointer to the buffer data that may already be allocated by the application. The size |
| of the buffer that <code class="varname">host_ptr</code> points to must be greater than or equal to the <code class="varname">size</code> bytes. |
| </p> |
| </dd> |
| <dt> |
| <span class="term"> |
| <code class="varname">errcode_ret</code> |
| </span> |
| </dt> |
| <dd> |
| <p> |
| Returns an appropriate error code. If <code class="varname">errcode_ret</code> is NULL, no error code is returned. |
| </p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| <div class="refsect1" title="Errors"> |
| <a id="errors"></a> |
| <h2>Errors</h2> |
| <p> |
| Returns a valid non-zero buffer object and <code class="varname">errcode_ret</code> is set to <span class="errorname">CL_SUCCESS</span> if |
| the buffer object is created successfully. Otherwise, it returns a NULL value with one of the |
| following error values returned in <code class="varname">errcode_ret</code>: |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" type="disc"> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_CONTEXT</span> if <code class="varname">context</code> is not a valid context.. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_VALUE</span> if values specified in <code class="varname">flags</code> are not valid. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_BUFFER_SIZE</span> if <code class="varname">size</code> is 0 or is greater than |
| <span class="errorname">CL_DEVICE_MAX_MEM_ALLOC_SIZE</span> value specified in table of OpenCL Device Queries |
| for <a class="citerefentry" href="clGetDeviceInfo.html"><span class="citerefentry"><span class="refentrytitle">clGetDeviceInfo</span></span></a> for all devices in <code class="varname">context</code>. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_INVALID_HOST_PTR</span> if <code class="varname">host_ptr</code> is NULL and <span class="errorname">CL_MEM_USE_HOST_PTR</span> or |
| <span class="errorname">CL_MEM_COPY_HOST_PTR</span> are set in <code class="varname"> flags</code> or if <code class="varname"> host_ptr</code> is not NULL but |
| <span class="errorname">CL_MEM_COPY_HOST_PTR</span> or <span class="errorname">CL_MEM_USE_HOST_PTR</span> are not set in <code class="varname">flags</code>. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_MEM_OBJECT_ALLOCATION_FAILURE</span> if there is a failure to allocate memory for |
| buffer object. |
| </li> |
| <li class="listitem" style="list-style-type: disc"><span class="errorname">CL_OUT_OF_HOST_MEMORY</span> if there is a failure to allocate resources required by the |
| OpenCL implementation on the host. |
| </li> |
| </ul> |
| </div> |
| </div> |
| <div class="refsect1" title="Specification"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p> |
| <img src="pdficon_small1.gif" /> |
| |
| |
| <a href="http://www.khronos.org/registry/cl/specs/opencl-1.x-latest.pdf#page=52" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1" title="Also see"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="clEnqueueReadBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueReadBuffer</span></span></a>, |
| <a class="citerefentry" href="clEnqueueWriteBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueWriteBuffer</span></span></a>, |
| <a class="citerefentry" href="clEnqueueCopyBuffer.html"><span class="citerefentry"><span class="refentrytitle">clEnqueueCopyBuffer</span></span></a> |
| </p> |
| </div> |
| <div xmlns="" class="refsect3" lang="en" xml:lang="en"><a xmlns="http://www.w3.org/1999/xhtml" id="Copyright"></a><h4 xmlns="http://www.w3.org/1999/xhtml"></h4><img xmlns="http://www.w3.org/1999/xhtml" src="KhronosLogo.jpg" /><p xmlns="http://www.w3.org/1999/xhtml"></p>Copyright © 2007-2009 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. |
| </div> |
| </div> |
| </body> |
| </html> |
