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<title>Hardware Locality (hwloc): Interoperability with OpenGL displays</title>
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<div id="projectname">Hardware Locality (hwloc)
 <span id="projectnumber">1.11.9</span>
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<a href="#func-members">Functions</a> </div>
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<div class="title">Interoperability with OpenGL displays</div> </div>
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Functions</h2></td></tr>
<tr class="memitem:ga4d66a77e4fe4051d6e5b772c1b8fcec5"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00134.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00165.html#ga4d66a77e4fe4051d6e5b772c1b8fcec5">hwloc_gl_get_display_osdev_by_port_device</a> (<a class="el" href="a00135.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, unsigned port, unsigned device)</td></tr>
<tr class="separator:ga4d66a77e4fe4051d6e5b772c1b8fcec5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga2d36ef441d1dfddf49cfb5c01bd58d8e"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00134.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00165.html#ga2d36ef441d1dfddf49cfb5c01bd58d8e">hwloc_gl_get_display_osdev_by_name</a> (<a class="el" href="a00135.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, const char *name)</td></tr>
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<tr class="memitem:ga936665ab5f0d29a081c4b78d11f4ad07"><td class="memItemLeft" align="right" valign="top">static int </td><td class="memItemRight" valign="bottom"><a class="el" href="a00165.html#ga936665ab5f0d29a081c4b78d11f4ad07">hwloc_gl_get_display_by_osdev</a> (<a class="el" href="a00135.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> topology, <a class="el" href="a00134.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> osdev, unsigned *port, unsigned *device)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>This interface offers ways to retrieve topology information about OpenGL displays.</p>
<p>Only the NVIDIA display locality information is currently available, using the NV-CONTROL X11 extension and the NVCtrl library. </p>
<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga936665ab5f0d29a081c4b78d11f4ad07">◆ </a></span>hwloc_gl_get_display_by_osdev()</h2>
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<td class="memname">static int hwloc_gl_get_display_by_osdev </td>
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<td class="paramtype"><a class="el" href="a00135.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> </td>
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<td class="paramname"><em>osdev</em>, </td>
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<td class="paramtype">unsigned * </td>
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<td class="paramtype">unsigned * </td>
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<p>Get the OpenGL display port and device corresponding to the given hwloc OS object. </p>
<p>Return the OpenGL display port (server) in <code>port</code> and device (screen) in <code>screen</code> that correspond to the given hwloc OS device object. Return <code>-1</code> if there is none.</p>
<p>The topology <code>topology</code> does not necessarily have to match the current machine. For instance the topology may be an XML import of a remote host. I/O devices detection and the GL component must be enabled in the topology. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2d36ef441d1dfddf49cfb5c01bd58d8e">◆ </a></span>hwloc_gl_get_display_osdev_by_name()</h2>
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<td class="memname">static <a class="el" href="a00134.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> hwloc_gl_get_display_osdev_by_name </td>
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<p>Get the hwloc OS device object corresponding to the OpenGL display given by name. </p>
<p>Return the OS device object describing the OpenGL display whose name is <code>name</code>, built as ":port.device" such as ":0.0" . Return NULL if there is none.</p>
<p>The topology <code>topology</code> does not necessarily have to match the current machine. For instance the topology may be an XML import of a remote host. I/O devices detection and the GL component must be enabled in the topology.</p>
<dl class="section note"><dt>Note</dt><dd>The corresponding PCI device object can be obtained by looking at the OS device parent object. </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#ga4d66a77e4fe4051d6e5b772c1b8fcec5">◆ </a></span>hwloc_gl_get_display_osdev_by_port_device()</h2>
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<td class="memname">static <a class="el" href="a00134.html#ga79b8ab56877ef99ac59b833203391c7d">hwloc_obj_t</a> hwloc_gl_get_display_osdev_by_port_device </td>
<td>(</td>
<td class="paramtype"><a class="el" href="a00135.html#ga9d1e76ee15a7dee158b786c30b6a6e38">hwloc_topology_t</a> </td>
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<p>Get the hwloc OS device object corresponding to the OpenGL display given by port and device index. </p>
<p>Return the OS device object describing the OpenGL display whose port (server) is <code>port</code> and device (screen) is <code>device</code>. Return NULL if there is none.</p>
<p>The topology <code>topology</code> does not necessarily have to match the current machine. For instance the topology may be an XML import of a remote host. I/O devices detection and the GL component must be enabled in the topology.</p>
<dl class="section note"><dt>Note</dt><dd>The corresponding PCI device object can be obtained by looking at the OS device parent object. </dd></dl>
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