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| <title>__attribute__</title> |
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| <body> |
| <div class="refentry"> |
| <a id="id-1"></a> |
| <div class="titlepage"></div> |
| <div xmlns="" class="refnamediv"> |
| <a xmlns="http://www.w3.org/1999/xhtml" id="attribute"></a> |
| <h1>__attribute__</h1> |
| <p> |
| </p> |
| </div> |
| <div class="refsect2"> |
| <a id="synopsis"></a> |
| <h3> |
| </h3> |
| <div class="informaltable"> |
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| <tbody> |
| <tr> |
| <td align="left"> |
| __attribute__ ((<em class="replaceable"><code>attribute-list</code></em>)) |
| |
| attribute-list: |
| attribute<sub>opt</sub> |
| attribute-list, attribute<sub>opt</sub> |
| |
| attribute: |
| attribute-token attribute-argument-clause<sub>opt</sub> |
| |
| attribute-token: |
| identifier |
| |
| attribute-argument-clause: |
| ( attribute-argument-list ) |
| |
| attribute-argument-list: |
| attribute-argument |
| attribute-argument-list, attribute-argument |
| |
| attribute-argument: |
| assignment-expression |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a id="description"></a> |
| <h2>Description</h2> |
| <p> |
| This section describes the syntax with which <code class="code">__attribute__</code> may be used, |
| and the constructs to which attribute specifiers bind. |
| </p> |
| <p> |
| An attribute specifier is of the form <code class="constant">__attribute__ |
| ((<em class="replaceable"><code>attribute-list</code></em>))</code>. |
| </p> |
| <p> |
| This syntax is taken directly from GCC but unlike GCC, which allows attributes to be |
| applied only to functions, types, and variables, OpenCL attributes can be associated |
| with: |
| </p> |
| <div class="itemizedlist"> |
| <ul class="itemizedlist" style="list-style-type: bullet; "> |
| <li class="listitem" style="list-style-type: disc"> |
| <p> |
| <a class="citerefentry" href="attributes-types.html"><span class="citerefentry"><span class="refentrytitle">types</span></span></a> |
| </p> |
| </li> |
| <li class="listitem" style="list-style-type: disc"> |
| <p> |
| <a class="citerefentry" href="functionQualifiers.html"><span class="citerefentry"><span class="refentrytitle">functions</span></span></a> |
| </p> |
| </li> |
| <li class="listitem" style="list-style-type: disc"> |
| <p> |
| <a class="citerefentry" href="attributes-variables.html"><span class="citerefentry"><span class="refentrytitle">variables</span></span></a> |
| </p> |
| </li> |
| <li class="listitem" style="list-style-type: disc"> |
| <p> |
| <a class="citerefentry" href="attributes-blocksAndControlFlow.html"><span class="citerefentry"><span class="refentrytitle">blocks</span></span></a> |
| </p> |
| </li> |
| <li class="listitem" style="list-style-type: disc"> |
| <p> |
| <a class="citerefentry" href="attributes-blocksAndControlFlow.html"><span class="citerefentry"><span class="refentrytitle">control-flow statements</span></span></a> |
| </p> |
| </li> |
| </ul> |
| </div> |
| <p> |
| In general, the rules for how an attribute binds for a given context are non-trivial |
| and the reader is pointed to GCC's documentation and Maurer and Wong's paper (See the |
| "References" section in the <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-openclc.pdf#page=1" target="OpenCL Spec">OpenCL specification</a> |
| for details.) |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="specification"></a> |
| <h2>Specification</h2> |
| <p> |
| <img src="pdficon_small1.gif" /> |
| |
| <a href="https://www.khronos.org/registry/cl/specs/opencl-2.1-openclc.pdf#page=56" target="OpenCL Spec">OpenCL Specification</a> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a id="seealso"></a> |
| <h2>Also see</h2> |
| <p> |
| <a class="citerefentry" href="attributes-types.html"><span class="citerefentry"><span class="refentrytitle">Type Attributes</span></span></a>, |
| <a class="citerefentry" href="attributes-variables.html"><span class="citerefentry"><span class="refentrytitle">Variable Attributes</span></span></a>, |
| <a class="citerefentry" href="attributes-blocksAndControlFlow.html"><span class="citerefentry"><span class="refentrytitle">Block and Control-Flow Statement Attributes</span></span></a>, |
| <a class="citerefentry" href="functionQualifiers.html"><span class="citerefentry"><span class="refentrytitle">Function Qualifiers</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 © 2007-2015 The Khronos Group Inc. |
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