.. _program_listing_file_src_flamegpu_detail_wddm.cu:

Program Listing for File wddm.cu
================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_flamegpu_detail_wddm.cu>` (``src/flamegpu/detail/wddm.cu``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "flamegpu/detail/wddm.cuh"
   #include "flamegpu/simulation/detail/CUDAErrorChecking.cuh"
   
   namespace flamegpu {
   namespace detail {
   
   bool wddm::deviceIsWDDM(int deviceIndex) {
       // Throw an exception if the deviceIndex is negative.
       if (deviceIndex < 0) {
           THROW exception::InvalidCUDAdevice();
       }
       // Ensure deviceIndex is valid.
       int deviceCount = 0;
       gpuErrchk(cudaGetDeviceCount(&deviceCount));
       if (deviceIndex >= deviceCount) {
           // Throw an excpetion if the device index is bad.
           THROW exception::InvalidCUDAdevice();
       }
       // @todo - once WSL does not require insider builds, check how this behaves. AFAIK WSL is only supported for WDDM, but this may be incorrect.
       bool isWDDM = false;
       #ifdef _MSC_VER
           int tccDriver = 0;
           // Load device attributes
           gpuErrchk(cudaDeviceGetAttribute(&tccDriver, cudaDevAttrTccDriver, deviceIndex));
           // Compute the return value
           isWDDM = !tccDriver;
       #endif
       return isWDDM;
   }
   
   bool wddm::deviceIsWDDM() {
       // Get the current device
       int currentDeviceIndex = 0;
       gpuErrchk(cudaGetDevice(&currentDeviceIndex));
       // Get the wddm status for that device
       bool isWDDM = wddm::deviceIsWDDM(currentDeviceIndex);
       return isWDDM;
   }
   
   }  // namespace detail
   }  // namespace flamegpu