1.1 --- a/Hardware/Nvidia/NVAPI.cs	Tue Feb 09 18:55:45 2010 +0000
     1.2 +++ b/Hardware/Nvidia/NVAPI.cs	Tue Feb 09 19:42:33 2010 +0000
     1.3 @@ -174,6 +174,8 @@
     1.4        out int gpuCount);
     1.5      public delegate NvStatus NvAPI_EnumPhysicalGPUsDelegate(
     1.6        [Out] NvPhysicalGpuHandle[] gpuHandles, out int gpuCount);
     1.7 +    public delegate NvStatus NvAPI_GPU_GetTachReadingDelegate(
     1.8 +      NvPhysicalGpuHandle gpuHandle, out int value);
     1.9  
    1.10      private static bool available = false;
    1.11      private static nvapi_QueryInterfaceDelegate nvapi_QueryInterface;
    1.12 @@ -188,6 +190,8 @@
    1.13        NvAPI_GetPhysicalGPUsFromDisplay;
    1.14      public static NvAPI_EnumPhysicalGPUsDelegate
    1.15        NvAPI_EnumPhysicalGPUs;
    1.16 +    public static NvAPI_GPU_GetTachReadingDelegate
    1.17 +      NvAPI_GPU_GetTachReading;
    1.18  
    1.19      public static NvStatus NvAPI_GPU_GetFullName(NvPhysicalGpuHandle gpuHandle,
    1.20        out string name) {
    1.21 @@ -209,7 +213,12 @@
    1.22        where T : class 
    1.23      {
    1.24        IntPtr ptr = nvapi_QueryInterface(id);
    1.25 -      newDelegate = Marshal.GetDelegateForFunctionPointer(ptr, typeof(T)) as T;      
    1.26 +      if (ptr != IntPtr.Zero) {
    1.27 +        newDelegate =
    1.28 +          Marshal.GetDelegateForFunctionPointer(ptr, typeof(T)) as T;
    1.29 +      } else {
    1.30 +        newDelegate = null;
    1.31 +      }
    1.32      }
    1.33  
    1.34      static NVAPI() { 
    1.35 @@ -231,6 +240,7 @@
    1.36          GetDelegate(0x9ABDD40D, out NvAPI_EnumNvidiaDisplayHandle);
    1.37          GetDelegate(0x34EF9506, out NvAPI_GetPhysicalGPUsFromDisplay);
    1.38          GetDelegate(0xE5AC921F, out NvAPI_EnumPhysicalGPUs);
    1.39 +        GetDelegate(0x5F608315, out NvAPI_GPU_GetTachReading);        
    1.40          available = true;
    1.41        }
    1.42      }