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<title>NVIDIA CUDA Library: cuD3D11GetDevices</title>
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<div class="navpath"><a class="el" href="group__CUDA__D3D11.html">Direct3D 11 Interoperability</a>
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<tr><td class="navtab"><a class="qindex" href="group__CUDA__D3D11_ge4af5a512b035287636a04d10e8a9c45.html#ge4af5a512b035287636a04d10e8a9c45">cuD3D11CtxCreate</a></td></tr>
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<tr><td class="navtab"><a class="qindex" href="group__CUDA__D3D11_gc47ad4bcae328242abd597e8ca14c9dd.html#gc47ad4bcae328242abd597e8ca14c9dd">CUd3d11DeviceList</a></td></tr>
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<tr><td class="navtab"><a class="qindex" href="group__CUDA__D3D11_g5de097eb7ea7fb3721e9c7f79528113e.html#g5de097eb7ea7fb3721e9c7f79528113e">cuD3D11GetDirect3DDevice</a></td></tr>
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<a class="anchor" name="g7fca109b0dba2050b58f6bac627ff441"></a><!-- doxytag: member="cudaD3D11.h::cuD3D11GetDevices" ref="g7fca109b0dba2050b58f6bac627ff441" args="(unsigned int *pCudaDeviceCount, CUdevice *pCudaDevices, unsigned int cudaDeviceCount, ID3D11Device *pD3D11Device, CUd3d11DeviceList deviceList)" -->
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<td class="memname"><a class="el" href="group__CUDA__TYPES_g09da14df1a751dcbfeccb9cf0073d64c.html#g09da14df1a751dcbfeccb9cf0073d64c">CUresult</a> cuD3D11GetDevices </td>
<td>(</td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>pCudaDeviceCount</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="group__CUDA__TYPES_gcd81b70eb9968392bb5cdf582af8eab4.html#gcd81b70eb9968392bb5cdf582af8eab4">CUdevice</a> * </td>
<td class="paramname"> <em>pCudaDevices</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>cudaDeviceCount</em>, </td>
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<td class="paramtype">ID3D11Device * </td>
<td class="paramname"> <em>pD3D11Device</em>, </td>
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<td class="paramtype"><a class="el" href="group__CUDA__D3D11_gc47ad4bcae328242abd597e8ca14c9dd.html#gc47ad4bcae328242abd597e8ca14c9dd">CUd3d11DeviceList</a> </td>
<td class="paramname"> <em>deviceList</em></td><td> </td>
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<td>)</td>
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<p>
Returns in <code>*pCudaDeviceCount</code> the number of CUDA-compatible device corresponding to the Direct3D 11 device <code>pD3D11Device</code>. Also returns in <code>*pCudaDevices</code> at most <code>cudaDeviceCount</code> of the the CUDA-compatible devices corresponding to the Direct3D 11 device <code>pD3D11Device</code>.<p>
If any of the GPUs being used to render <code>pDevice</code> are not CUDA capable then the call will return <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaa761bea84083d384d4fb88d51d972aada">CUDA_ERROR_NO_DEVICE</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>pCudaDeviceCount</em> </td><td>- Returned number of CUDA devices corresponding to <code>pD3D11Device</code> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>pCudaDevices</em> </td><td>- Returned CUDA devices corresponding to <code>pD3D11Device</code> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>cudaDeviceCount</em> </td><td>- The size of the output device array <code>pCudaDevices</code> </td></tr>
<tr><td valign="top"></td><td valign="top"><em>pD3D11Device</em> </td><td>- Direct3D 11 device to query for CUDA devices </td></tr>
<tr><td valign="top"></td><td valign="top"><em>deviceList</em> </td><td>- The set of devices to return. This set may be <a class="el" href="group__CUDA__D3D11_g6c8dd4f7e2416091e6b4bbfa9f1bffcd.html#gg6c8dd4f7e2416091e6b4bbfa9f1bffcdf6d10bf4ca0a08ec3a8638799a42f06d">CU_D3D11_DEVICE_LIST_ALL</a> for all devices, <a class="el" href="group__CUDA__D3D11_g6c8dd4f7e2416091e6b4bbfa9f1bffcd.html#gg6c8dd4f7e2416091e6b4bbfa9f1bffcdcf10944d19f95ddebf5e2a56b3313bb2">CU_D3D11_DEVICE_LIST_CURRENT_FRAME</a> for the devices used to render the current frame (in SLI), or <a class="el" href="group__CUDA__D3D11_g6c8dd4f7e2416091e6b4bbfa9f1bffcd.html#gg6c8dd4f7e2416091e6b4bbfa9f1bffcd6f90591f1e5804a28848a8ce6654d986">CU_D3D11_DEVICE_LIST_NEXT_FRAME</a> for the devices used to render the next frame (in SLI).</td></tr>
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</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd><a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaaa0eed720f8a87cd1c5fd1c453bc7a03d">CUDA_SUCCESS</a>, <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaaacf52f132faf29b473cdda6061f0f44a">CUDA_ERROR_DEINITIALIZED</a>, <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaa8feb999f0af99b4a25ab26b3866f4df8">CUDA_ERROR_NOT_INITIALIZED</a>, <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaa761bea84083d384d4fb88d51d972aada">CUDA_ERROR_NO_DEVICE</a>, <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaa90696c86fcee1f536a1ec7d25867feeb">CUDA_ERROR_INVALID_VALUE</a>, <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaaaf1cadbeb21d3a78115ca211ba44c053">CUDA_ERROR_NOT_FOUND</a>, <a class="el" href="group__CUDA__TYPES_g0cdead942fd5028d157641eef6bdeeaa.html#gg0cdead942fd5028d157641eef6bdeeaac5a6ab0245179d297f1fa56ed0097183">CUDA_ERROR_UNKNOWN</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__CUDA__D3D11_ge4af5a512b035287636a04d10e8a9c45.html#ge4af5a512b035287636a04d10e8a9c45" title="Create a CUDA context for interoperability with Direct3D 11.">cuD3D11CtxCreate</a> </dd></dl>
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