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67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
#include <windows.h>
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#include <iostream>
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#include "nvidia_info.h"
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#include "gpu.h"
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// magic numbers, do not change them
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#define NVAPI_MAX_PHYSICAL_GPUS 64
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#define NVAPI_MAX_USAGES_PER_GPU 34
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// function pointer types
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typedef int *(*NvAPI_QueryInterface_t)(unsigned int offset);
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typedef int (*NvAPI_Initialize_t)();
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typedef int (*NvAPI_EnumPhysicalGPUs_t)(int **handles, int *count);
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typedef int (*NvAPI_GPU_GetUsages_t)(int *handle, unsigned int *usages);
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NvAPI_QueryInterface_t NvAPI_QueryInterface = NULL;
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NvAPI_Initialize_t NvAPI_Initialize = NULL;
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NvAPI_EnumPhysicalGPUs_t NvAPI_EnumPhysicalGPUs = NULL;
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NvAPI_GPU_GetUsages_t NvAPI_GPU_GetUsages = NULL;
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HMODULE hmod;
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bool init_nvapi_bool;
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int *gpuHandles[NVAPI_MAX_PHYSICAL_GPUS] = { NULL };
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int gpuCount = 0;
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unsigned int gpuUsages[NVAPI_MAX_USAGES_PER_GPU] = { 0 };
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bool checkNVAPI(){
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#if _WIN64
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hmod = LoadLibraryA("nvapi64.dll");
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#else
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hmod = LoadLibraryA("nvapi.dll");
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#endif
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if (hmod == NULL)
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{
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printf("Failed to load nvapi.dll");
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return false;
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}
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NvAPI_QueryInterface = (NvAPI_QueryInterface_t) GetProcAddress(hmod, "nvapi_QueryInterface");
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NvAPI_Initialize = (NvAPI_Initialize_t) (*NvAPI_QueryInterface)(0x0150E828);
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NvAPI_EnumPhysicalGPUs = (NvAPI_EnumPhysicalGPUs_t) (*NvAPI_QueryInterface)(0xE5AC921F);
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NvAPI_GPU_GetUsages = (NvAPI_GPU_GetUsages_t) (*NvAPI_QueryInterface)(0x189A1FDF);
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if (NvAPI_Initialize == NULL || NvAPI_EnumPhysicalGPUs == NULL ||
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NvAPI_EnumPhysicalGPUs == NULL || NvAPI_GPU_GetUsages == NULL)
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{
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std::cerr << "Couldn't get functions in nvapi.dll" << std::endl;
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return 2;
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}
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(*NvAPI_Initialize)();
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int *gpuHandles[NVAPI_MAX_PHYSICAL_GPUS] = { NULL };
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return true;
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}
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void nvapi_util()
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{
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if (!init_nvapi_bool){
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init_nvapi_bool = checkNVAPI();
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}
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gpuUsages[0] = (NVAPI_MAX_USAGES_PER_GPU * 4) | 0x10000;
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(*NvAPI_EnumPhysicalGPUs)(gpuHandles, &gpuCount);
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(*NvAPI_GPU_GetUsages)(gpuHandles[0], gpuUsages);
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gpu_info.load = gpuUsages[3];
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} |