119 lines
5.1 KiB
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119 lines
5.1 KiB
HTML
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<head>
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<title>GNU libgomp: acc_copyin</title>
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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_005fcopyin.html#acc_005fpresent_005for_005fcopyin" rel="next" title="acc_present_or_copyin">
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<a name="acc_005fcopyin"></a>
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<p>
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Next: <a href="acc_005fpresent_005for_005fcopyin.html#acc_005fpresent_005for_005fcopyin" accesskey="n" rel="next">acc_present_or_copyin</a>, Previous: <a href="acc_005ffree.html#acc_005ffree" accesskey="p" rel="prev">acc_free</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_005fcopyin-_002d_002d-Allocate-device-memory-and-copy-host-memory-to-it_002e"></a>
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<h3 class="section">5.17 <code>acc_copyin</code> – Allocate device memory and copy host memory to it.</h3>
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<dl compact="compact">
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<dt><em>Description</em></dt>
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<dd><p>In C/C++, this function allocates <var>len</var> bytes of device memory
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and maps it to the specified host address in <var>a</var>. The device
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address of the newly allocated device memory is returned.
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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
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variable or 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_copyin(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_copyin(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_copyin(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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3.2.17.
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</p></dd>
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</dl>
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