119 lines
5.2 KiB
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119 lines
5.2 KiB
HTML
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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(see below). A copy of the license is included in the section entitled
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>GNU libgomp: acc_create</title>
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<meta name="description" content="GNU libgomp: acc_create">
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<meta name="keywords" content="GNU libgomp: acc_create">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Library-Index.html#Library-Index" rel="index" title="Library Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="OpenACC-Runtime-Library-Routines.html#OpenACC-Runtime-Library-Routines" rel="up" title="OpenACC Runtime Library Routines">
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<link href="acc_005fpresent_005for_005fcreate.html#acc_005fpresent_005for_005fcreate" rel="next" title="acc_present_or_create">
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<link href="acc_005fpresent_005for_005fcopyin.html#acc_005fpresent_005for_005fcopyin" rel="prev" title="acc_present_or_copyin">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="acc_005fcreate"></a>
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<div class="header">
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<p>
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Next: <a href="acc_005fpresent_005for_005fcreate.html#acc_005fpresent_005for_005fcreate" accesskey="n" rel="next">acc_present_or_create</a>, Previous: <a href="acc_005fpresent_005for_005fcopyin.html#acc_005fpresent_005for_005fcopyin" accesskey="p" rel="prev">acc_present_or_copyin</a>, Up: <a href="OpenACC-Runtime-Library-Routines.html#OpenACC-Runtime-Library-Routines" accesskey="u" rel="up">OpenACC Runtime Library Routines</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Library-Index.html#Library-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="acc_005fcreate-_002d_002d-Allocate-device-memory-and-map-it-to-host-memory_002e"></a>
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<h3 class="section">5.19 <code>acc_create</code> – Allocate device memory and map it to host memory.</h3>
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<dl compact="compact">
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<dt><em>Description</em></dt>
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<dd><p>This function allocates device memory and maps it to host memory specified
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by the host address <var>a</var> with a length of <var>len</var> bytes. In C/C++,
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the function returns the device address of the allocated device memory.
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</p>
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<p>In Fortran, two (2) forms are supported. In the first form, <var>a</var> specifies
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a contiguous array section. The second form <var>a</var> specifies a variable or
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array element and <var>len</var> specifies the length in bytes.
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</p>
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</dd>
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<dt><em>C/C++</em>:</dt>
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<dd><table>
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<tr><td width="20%"><em>Prototype</em>:</td><td width="80%"><code>void *acc_create(h_void *a, size_t len);</code></td></tr>
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</table>
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</dd>
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<dt><em>Fortran</em>:</dt>
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<dd><table>
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<tr><td width="20%"><em>Interface</em>:</td><td width="80%"><code>subroutine acc_create(a)</code></td></tr>
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<tr><td width="20%"></td><td width="80%"><code>type, dimension(:[,:]...) :: a</code></td></tr>
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<tr><td width="20%"><em>Interface</em>:</td><td width="80%"><code>subroutine acc_create(a, len)</code></td></tr>
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<tr><td width="20%"></td><td width="80%"><code>type, dimension(:[,:]...) :: a</code></td></tr>
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<tr><td width="20%"></td><td width="80%"><code>integer len</code></td></tr>
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</table>
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</dd>
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<dt><em>Reference</em>:</dt>
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<dd><p><a href="http://www.openacc.org/">OpenACC specification v2.0</a>, section
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3.2.19.
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</p></dd>
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</dl>
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</body>
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</html>
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