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<div class="navpath"><a class="el" href="group__CUDART__D3D9.html">Direct3D 9 Interoperability</a>
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<a class="anchor" name="g3b7a9c5a5f249fa1f8fb5743304474b5"></a><!-- doxytag: member="cuda_d3d9_interop.h::cudaD3D9SetDirect3DDevice" ref="g3b7a9c5a5f249fa1f8fb5743304474b5" args="(IDirect3DDevice9 *pD3D9Device, int device=-1)" -->
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<td class="memname"><a class="el" href="group__CUDART__TYPES_gf599e5b8b829ce7db0f5216928f6ecb6.html#gf599e5b8b829ce7db0f5216928f6ecb6">cudaError_t</a> cudaD3D9SetDirect3DDevice </td>
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<td class="paramtype">IDirect3DDevice9 * </td>
<td class="paramname"> <em>pD3D9Device</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"> <em>device</em> = <code>-1</code></td><td> </td>
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Records <code>pD3D9Device</code> as the Direct3D 9 device to use for Direct3D 9 interoperability with the CUDA device <code>device</code> and sets <code>device</code> as the current device for the calling host thread.<p>
If <code>device</code> has already been initialized then this call will fail with the error <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038a906ddf08d574274bf7334adb1497550">cudaErrorSetOnActiveProcess</a>. In this case it is necessary to reset <code>device</code> using <a class="el" href="group__CUDART__DEVICE_gdcc2c6f914eb9461565b12648faa5e28.html#gdcc2c6f914eb9461565b12648faa5e28" title="Destroy all allocations and reset all state on the current device in the current...">cudaDeviceReset()</a> before Direct3D 9 interoperability on <code>device</code> may be enabled.<p>
Successfully initializing CUDA interoperability with <code>pD3D9Device</code> will increase the internal reference count on <code>pD3D9Device</code>. This reference count will be decremented when <code>device</code> is reset using <a class="el" href="group__CUDART__DEVICE_gdcc2c6f914eb9461565b12648faa5e28.html#gdcc2c6f914eb9461565b12648faa5e28" title="Destroy all allocations and reset all state on the current device in the current...">cudaDeviceReset()</a>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pD3D9Device</em> </td><td>- Direct3D device to use for this thread </td></tr>
<tr><td valign="top"></td><td valign="top"><em>device</em> </td><td>- The CUDA device to use. This device must be among the devices returned when querying <a class="el" href="group__CUDART__D3D9_g93e3d8aabc986f1799a2754135e31379.html#gg93e3d8aabc986f1799a2754135e31379d60701634fd33febe258c9192ce49a89">cudaD3D9DeviceListAll</a> from <a class="el" href="group__CUDART__D3D9_g3e0de372020bba09fe032a956736dd27.html#g3e0de372020bba09fe032a956736dd27" title="Gets the CUDA devices corresponding to a Direct3D 9 device.">cudaD3D9GetDevices</a>, may be set to -1 to automatically select an appropriate CUDA device.</td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd><a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038e355f04607d824883b4a50662830d591">cudaSuccess</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038ce7993a88ecf2c57b8102d55d997a18c">cudaErrorInitializationError</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e00383e8aef5398ee38e28ed41e357b48917c">cudaErrorInvalidValue</a>, <a class="el" href="group__CUDART__TYPES_g3f51e3575c2178246db0a94a430e0038.html#gg3f51e3575c2178246db0a94a430e0038a906ddf08d574274bf7334adb1497550">cudaErrorSetOnActiveProcess</a> </dd></dl>
<dl class="note" compact><dt><b>Note:</b></dt><dd>Note that this function may also return error codes from previous, asynchronous launches.</dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__CUDART__D3D9_gce3447041e9b21679501dfd5d54d0475.html#gce3447041e9b21679501dfd5d54d0475" title="Gets the device number for an adapter.">cudaD3D9GetDevice</a>, <a class="el" href="group__CUDART__D3D9_gbe1082b566be4ab414bf69047449ad93.html#gbe1082b566be4ab414bf69047449ad93" title="Register a Direct3D 9 resource for access by CUDA.">cudaGraphicsD3D9RegisterResource</a>, <a class="el" href="group__CUDART__DEVICE_gdcc2c6f914eb9461565b12648faa5e28.html#gdcc2c6f914eb9461565b12648faa5e28" title="Destroy all allocations and reset all state on the current device in the current...">cudaDeviceReset</a> </dd></dl>
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