http://code.msdn.microsoft.com/windowsdesktop/DirectX-Video-Memory-ee7d8319

// KGpuMon.h  源代码
#pragma once

#define MAX_GPU_NUM     4L      // 监控的GPU个数（NVIDIA定义的最多GPU个数是64，这里最多只监控4个）
#define MY_PROCESS_ERROR(Condition) do { if (!(Condition)) goto Exit0; } while (false)

#define MAX_DISPLAY_CARDS               4       // 最多监控4块显卡（暂时应该够了吧）
// 常量定义
#define MAX_PHYSICAL_GPUS               64
#define SHORT_STRING_MAX                64
#define MAX_THERMAL_SENSORS_PER_GPU     3
#define MAX_CLOCKS_PER_GPU              0x120
#define MAX_PSTATES_PER_GPU             8
#define MAX_USAGES_PER_GPU              33
#define MAX_COOLER_PER_GPU              20
#define MAX_MEMORY_VALUES_PER_GPU       5

// 接口ID值
#define ID_NvAPI_Initialize                     0x0150E828
#define ID_NvAPI_GPU_GetFullName                0xCEEE8E9F
#define ID_NvAPI_GPU_GetThermalSettings         0xE3640A56
#define ID_NvAPI_EnumNvidiaDisplayHandle        0x9ABDD40D
#define ID_NvAPI_GetPhysicalGPUsFromDisplay     0x34EF9506
#define ID_NvAPI_EnumPhysicalGPUs               0xE5AC921F
#define ID_NvAPI_GPU_GetTachReading             0x5F608315
#define ID_NvAPI_GPU_GetAllClocks               0x1BD69F49
#define ID_NvAPI_GPU_GetPStates                 0x60DED2ED
#define ID_NvAPI_GPU_GetUsages                  0x189A1FDF
#define ID_NvAPI_GPU_GetCoolerSettings          0xDA141340
#define ID_NvAPI_GPU_SetCoolerLevels            0x891FA0AE
#define ID_NvAPI_GPU_GetMemoryInfo              0x774AA982
#define ID_NvAPI_GetDisplayDriverVersion        0xF951A4D1
#define ID_NvAPI_GetInterfaceVersionString      0x01053FA5
#define ID_NvAPI_GPU_GetPCIIdentifiers          0x2DDFB66E

// 版本号参数定义
#define GPU_THERMAL_SETTINGS_VER                (sizeof(NvGPUThermalSettings) | 0x10000)
#define GPU_CLOCKS_VER                          (sizeof(NvClocks) | 0x20000)
#define GPU_PSTATES_VER                         (sizeof(NvPStates) | 0x10000)
#define GPU_USAGES_VER                          (sizeof(NvUsages) | 0x10000)
#define GPU_COOLER_SETTINGS_VER                 (sizeof(NvGPUCoolerSettings) | 0x20000)
#define GPU_MEMORY_INFO_VER                     (sizeof(NvMemoryInfo) | 0x20000)
#define DISPLAY_DRIVER_VERSION_VER              (sizeof(NvDisplayDriverVersion) | 0x10000)
#define GPU_COOLER_LEVELS_VER                   (sizeof(NvGPUCoolerLevels) | 0x10000)

enum NvStatus
{
    enumNvStatus_OK = 0,
    enumNvStatus_ERROR = -1,
    enumNvStatus_LIBRARY_NOT_FOUND = -2,
    enumNvStatus_NO_IMPLEMENTATION = -3,
    enumNvStatus_API_NOT_INTIALIZED = -4,
    enumNvStatus_INVALID_ARGUMENT = -5,
    enumNvStatus_NVIDIA_DEVICE_NOT_FOUND = -6,
    enumNvStatus_END_ENUMERATION = -7,
    enumNvStatus_INVALID_HANDLE = -8,
    enumNvStatus_INCOMPATIBLE_STRUCT_VERSION = -9,
    enumNvStatus_HANDLE_INVALIDATED = -10,
    enumNvStatus_OPENGL_CONTEXT_NOT_CURRENT = -11,
    enumNvStatus_NO_GL_EXPERT = -12,
    enumNvStatus_INSTRUMENTATION_DISABLED = -13,
    enumNvStatus_EXPECTED_LOGICAL_GPU_HANDLE = -100,
    enumNvStatus_EXPECTED_PHYSICAL_GPU_HANDLE = -101,
    enumNvStatus_EXPECTED_DISPLAY_HANDLE = -102,
    enumNvStatus_INVALID_COMBINATION = -103,
    enumNvStatus_NOT_SUPPORTED = -104,
    enumNvStatus_PORTID_NOT_FOUND = -105,
    enumNvStatus_EXPECTED_UNATTACHED_DISPLAY_HANDLE = -106,
    enumNvStatus_INVALID_PERF_LEVEL = -107,
    enumNvStatus_DEVICE_BUSY = -108,
    enumNvStatus_NV_PERSIST_FILE_NOT_FOUND = -109,
    enumNvStatus_PERSIST_DATA_NOT_FOUND = -110,
    enumNvStatus_EXPECTED_TV_DISPLAY = -111,
    enumNvStatus_EXPECTED_TV_DISPLAY_ON_DCONNECTOR = -112,
    enumNvStatus_NO_ACTIVE_SLI_TOPOLOGY = -113,
    enumNvStatus_SLI_RENDERING_MODE_NOTALLOWED = -114,
    enumNvStatus_EXPECTED_DIGITAL_FLAT_PANEL = -115,
    enumNvStatus_ARGUMENT_EXCEED_MAX_SIZE = -116,
    enumNvStatus_DEVICE_SWITCHING_NOT_ALLOWED = -117,
    enumNvStatus_TESTING_CLOCKS_NOT_SUPPORTED = -118,
    enumNvStatus_UNKNOWN_UNDERSCAN_CONFIG = -119,
    enumNvStatus_TIMEOUT_RECONFIGURING_GPU_TOPO = -120,
    enumNvStatus_DATA_NOT_FOUND = -121,
    enumNvStatus_EXPECTED_ANALOG_DISPLAY = -122,
    enumNvStatus_NO_VIDLINK = -123,
    enumNvStatus_REQUIRES_REBOOT = -124,
    enumNvStatus_INVALID_HYBRID_MODE = -125,
    enumNvStatus_MIXED_TARGET_TYPES = -126,
    enumNvStatus_SYSWOW64_NOT_SUPPORTED = -127,
    enumNvStatus_IMPLICIT_SET_GPU_TOPOLOGY_CHANGE_NOT_ALLOWED = -128,
    enumNvStatus_REQUEST_USER_TO_CLOSE_NON_MIGRATABLE_APPS = -129,
    enumNvStatus_OUT_OF_MEMORY = -130,
    enumNvStatus_WAS_STILL_DRAWING = -131,
    enumNvStatus_FILE_NOT_FOUND = -132,
    enumNvStatus_TOO_MANY_UNIQUE_STATE_OBJECTS = -133,
    enumNvStatus_INVALID_CALL = -134,
    enumNvStatus_D3D10_1_LIBRARY_NOT_FOUND = -135,
    enumNvStatus_FUNCTION_NOT_FOUND = -136
};

enum NvThermalController
{
    enumNvThermalController_NONE = 0,
    enumNvThermalController_GPU_INTERNAL,
    enumNvThermalController_ADM1032,
    enumNvThermalController_MAX6649,
    enumNvThermalController_MAX1617,
    enumNvThermalController_LM99,
    enumNvThermalController_LM89,
    enumNvThermalController_LM64,
    enumNvThermalController_ADT7473,
    enumNvThermalController_SBMAX6649,
    enumNvThermalController_VBIOSEVT,
    enumNvThermalController_OS,
    enumNvThermalController_UNKNOWN = -1,
};

enum NvThermalTarget
{
    enumNvThermalTarget_NONE = 0,
    enumNvThermalTarget_GPU = 1,
    enumNvThermalTarget_MEMORY = 2,
    enumNvThermalTarget_POWER_SUPPLY = 4,
    enumNvThermalTarget_BOARD = 8,
    enumNvThermalTarget_ALL = 15,
    enumNvThermalTarget_UNKNOWN = -1
};

typedef struct _NvSensor
{
    NvThermalController Controller;
    unsigned int DefaultMinTemp;
    unsigned int DefaultMaxTemp;
    unsigned int CurrentTemp;
    NvThermalTarget Target;
}NvSensor;

typedef struct _NvGPUThermalSettings
{
    unsigned int Version;
    unsigned int Count;
    NvSensor Sensor[MAX_THERMAL_SENSORS_PER_GPU];
}NvGPUThermalSettings;

typedef struct _NvClocks
{
    unsigned int Version;
    unsigned int Clock[MAX_CLOCKS_PER_GPU];
}NvClocks;

typedef struct _NvPState
{
    bool Present;
    int Percentage;
}NvPState;

typedef struct _NvPStates
{
    unsigned int Version;
    unsigned int Flags;
    NvPState PStates[MAX_PSTATES_PER_GPU];
}NvPStates;

typedef struct _NvUsages
{
    unsigned int Version;
    unsigned int Usages[MAX_USAGES_PER_GPU];
}NvUsages;

typedef struct _NvCooler
{
    int Type;
    int Controller;
    int DefaultMin;
    int DefaultMax;
    int CurrentMin;
    int CurrentMax;
    int CurrentLevel;
    int DefaultPolicy;
    int CurrentPolicy;
    int Target;
    int ControlType;
    int Active;
}NvCooler;

typedef struct _NvGPUCoolerSettings
{
    unsigned int Version;
    unsigned int Count;
    NvCooler Coolers[MAX_COOLER_PER_GPU];
}NvGPUCoolerSettings;

typedef struct _NvLevel
{
    int Level;
    int Policy;
}NvLevel;

typedef struct _NvGPUCoolerLevels
{
    unsigned int Version;
    NvLevel Levels[MAX_COOLER_PER_GPU];
}NvGPUCoolerLevels;

typedef struct _NvMemoryInfo
{
    unsigned int Version;
    unsigned int Values[MAX_MEMORY_VALUES_PER_GPU];
}NvMemoryInfo;

typedef struct _NvDisplayDriverVersion
{
    unsigned int Version;
    unsigned int DriverVersion;
    unsigned int BldChangeListNum;    
    char szBuildBranch[SHORT_STRING_MAX];
    char szAdapter[SHORT_STRING_MAX];
}NvDisplayDriverVersion;

typedef int NvPhysicalGpuHandle;
typedef int NvDisplayHandle;

// 函数定义
typedef void* (*nvapi_QueryInterfaceType)(unsigned int uiInterfaceID);
typedef NvStatus (*NvAPI_InitializeType)();
typedef NvStatus (*NvAPI_GPU_GetFullNameType)(const NvPhysicalGpuHandle gpuHandle, char *pszName);
typedef NvStatus (*NvAPI_GPU_GetThermalSettingsType)(const NvPhysicalGpuHandle gpuHandle, int sensorIndex, NvGPUThermalSettings *pnvGPUThermalSettings);
typedef NvStatus (*NvAPI_EnumNvidiaDisplayHandleType)(const int thisEnum, NvDisplayHandle *pDisplayHandle);
typedef NvStatus (*NvAPI_GetPhysicalGPUsFromDisplayType)(const NvDisplayHandle displayHandle, NvPhysicalGpuHandle *pGpuHandles, unsigned int *pGpuCount);
typedef NvStatus (*NvAPI_EnumPhysicalGPUsType)(NvPhysicalGpuHandle *pGpuHandles, int *pGpuCount);
typedef NvStatus (*NvAPI_GPU_GetTachReadingType)(const NvPhysicalGpuHandle gpuHandle, int *pnValue);
typedef NvStatus (*NvAPI_GPU_GetAllClocksType)(const NvPhysicalGpuHandle gpuHandle, NvClocks *pnvClocks);
typedef NvStatus (*NvAPI_GPU_GetPStatesType)(const NvPhysicalGpuHandle gpuHandle, NvPStates *pnvPStates);
typedef NvStatus (*NvAPI_GPU_GetUsagesType)(const NvPhysicalGpuHandle gpuHandle, NvUsages *pnvUsages);
typedef NvStatus (*NvAPI_GPU_GetCoolerSettingsType)(const NvPhysicalGpuHandle gpuHandle, int coolerIndex, NvGPUCoolerSettings *pnvGPUCoolerSettings);
typedef NvStatus (*NvAPI_GPU_SetCoolerLevelsType)(const NvPhysicalGpuHandle gpuHandle, int coolerIndex, NvGPUCoolerLevels *pnvGPUCoolerLevels);
typedef NvStatus (*NvAPI_GPU_GetMemoryInfoType)(const NvDisplayHandle displayHandle, NvMemoryInfo *pnvMemoryInfo);
typedef NvStatus (*NvAPI_GetDisplayDriverVersionType)(const NvDisplayHandle displayHandle, NvDisplayDriverVersion *pnvDisplayDriverVersion);
typedef NvStatus (*NvAPI_GetInterfaceVersionStringType)(char *pszVersion);
typedef NvStatus (*NvAPI_GPU_GetPCIIdentifiersType)(
    const NvPhysicalGpuHandle gpuHandle, 
    unsigned int *puiDeviceId, 
    unsigned int *puiSubSystemId, 
    unsigned int *puiRevisionId, 
    unsigned int *puiExtDeviceId
    );

//*****************************以下是类内部使用的结构体************************************//
/*
* @brief GPU信息
*/
typedef struct _GPU_INFO
{
    NvPhysicalGpuHandle     nvGpuHandle;        // GPU句柄
    int                     nUsage;             // GPU占用率
}GPU_INFO;

/*
* @brief 显卡信息
*/
typedef struct _DISPLAY_CARD_INFO
{
    NvDisplayHandle nvDisplayHandle;            // 显卡句柄
    int             nGpuCount;                  // Gpu个数
    DWORD           dwTotalMemory;              // 总显存大小（KB）
    DWORD           dwFreeMemory;               // 空闲显存大小（KB）

    GPU_INFO        sGpuInfo[MAX_GPU_NUM];      // GPU信息
}DISPLAY_CARD_INFO;
//*****************************************************************************************//

/*
* @brief 显卡相关信息（可用于导出的结构体）
*/
typedef struct _DISPLAY_INFO
{
    int         nGpuCount;                  // Gpu个数
    int         nGpuUsages[MAX_GPU_NUM];    // Gpu占用率
    DWORD       dwTotalMemory;              // 总显存大小（KB）
    DWORD       dwFreeMemory;               // 空闲显存大小（KB）
}DISPLAY_INFO;

class KGpuMon
{
public:
    KGpuMon(void);
    ~KGpuMon(void);

    BOOL Init();
    BOOL Unit();

    int GetDisplayCardCount();
    BOOL GetDisplayInfo(const int nCardIndex, DISPLAY_INFO *pDisplayInfo);
private:
    int     EnumDisplayCards();
    BOOL    GetGpuHandles(const NvDisplayHandle nvDisplayHandle, DISPLAY_CARD_INFO *pCardInfo);

    BOOL    GetDisplayCardGpuUsages(const NvDisplayHandle nvDisplayHandle, DISPLAY_CARD_INFO *pCardInfo);
    BOOL    GetDisplayCardMemoryInfo(const NvDisplayHandle nvDisplayHandle, DISPLAY_CARD_INFO *pCardInfo);
private:
    nvapi_QueryInterfaceType m_pfnNvapi_QueryInterface;
    NvAPI_InitializeType m_pfnNvAPI_Initialize;
    NvAPI_GPU_GetFullNameType m_pfnNvAPI_GPU_GetFullName;
    NvAPI_GPU_GetThermalSettingsType m_pfnNvAPI_GPU_GetThermalSettings;
    NvAPI_EnumNvidiaDisplayHandleType m_pfnNvAPI_EnumNvidiaDisplayHandle;
    NvAPI_GetPhysicalGPUsFromDisplayType m_pfnNvAPI_GetPhysicalGPUsFromDisplay;
    NvAPI_EnumPhysicalGPUsType m_pfnNvAPI_EnumPhysicalGPUs;
    NvAPI_GPU_GetTachReadingType m_pfnNvAPI_GPU_GetTachReading;
    NvAPI_GPU_GetAllClocksType m_pfnNvAPI_GPU_GetAllClocks;
    NvAPI_GPU_GetPStatesType m_pfnNvAPI_GPU_GetPStates;
    NvAPI_GPU_GetUsagesType m_pfnNvAPI_GPU_GetUsages;
    NvAPI_GPU_GetCoolerSettingsType m_pfnNvAPI_GPU_GetCoolerSettings;
    NvAPI_GPU_SetCoolerLevelsType m_pfnNvAPI_GPU_SetCoolerLevels;
    NvAPI_GPU_GetMemoryInfoType m_pfnNvAPI_GPU_GetMemoryInfo;
    NvAPI_GetDisplayDriverVersionType m_pfnNvAPI_GetDisplayDriverVersion;
    NvAPI_GetInterfaceVersionStringType m_pfnNvAPI_GetInterfaceVersionString;
    NvAPI_GPU_GetPCIIdentifiersType m_pfnNvAPI_GPU_GetPCIIdentifiers;

    
    int                 m_nDisplayCardCount;
    DISPLAY_CARD_INFO*  m_pDisplayCards;
    HMODULE             m_hNvApiDll;
};


//**************************************************************************************************/
// KGpuMon.cpp 源代码
#include "StdAfx.h"
#include "KGpuMon.h"

KGpuMon::KGpuMon(void)
{
    m_hNvApiDll = NULL;
    m_nDisplayCardCount = 0;
    m_pDisplayCards = NULL;
}

KGpuMon::~KGpuMon(void)
{
    Unit();
}

BOOL KGpuMon::Init()
{
    BOOL bResult = FALSE;
    BOOL bRetCode = FALSE;

    int nIndex = 0;
    int nResult = 0;

    m_hNvApiDll = LoadLibrary(_T("nvapi.dll"));
    if (m_hNvApiDll)
    {
        m_pfnNvapi_QueryInterface = (nvapi_QueryInterfaceType)GetProcAddress(m_hNvApiDll, "nvapi_QueryInterface");
        if (m_pfnNvapi_QueryInterface)
        {
            m_pfnNvAPI_Initialize = (NvAPI_InitializeType)m_pfnNvapi_QueryInterface(ID_NvAPI_Initialize);
            m_pfnNvAPI_GPU_GetFullName = (NvAPI_GPU_GetFullNameType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetFullName);
            m_pfnNvAPI_GPU_GetThermalSettings = (NvAPI_GPU_GetThermalSettingsType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetThermalSettings);
            m_pfnNvAPI_EnumNvidiaDisplayHandle = (NvAPI_EnumNvidiaDisplayHandleType)m_pfnNvapi_QueryInterface(ID_NvAPI_EnumNvidiaDisplayHandle);
            m_pfnNvAPI_GetPhysicalGPUsFromDisplay = (NvAPI_GetPhysicalGPUsFromDisplayType)m_pfnNvapi_QueryInterface(ID_NvAPI_GetPhysicalGPUsFromDisplay);
            m_pfnNvAPI_EnumPhysicalGPUs = (NvAPI_EnumPhysicalGPUsType)m_pfnNvapi_QueryInterface(ID_NvAPI_EnumPhysicalGPUs);
            m_pfnNvAPI_GPU_GetTachReading = (NvAPI_GPU_GetTachReadingType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetTachReading);
            m_pfnNvAPI_GPU_GetAllClocks = (NvAPI_GPU_GetAllClocksType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetAllClocks);
            m_pfnNvAPI_GPU_GetPStates = (NvAPI_GPU_GetPStatesType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetPStates);
            m_pfnNvAPI_GPU_GetUsages = (NvAPI_GPU_GetUsagesType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetUsages);
            m_pfnNvAPI_GPU_GetCoolerSettings = (NvAPI_GPU_GetCoolerSettingsType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetCoolerSettings);
            m_pfnNvAPI_GPU_SetCoolerLevels = (NvAPI_GPU_SetCoolerLevelsType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_SetCoolerLevels);
            m_pfnNvAPI_GPU_GetMemoryInfo = (NvAPI_GPU_GetMemoryInfoType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetMemoryInfo);
            m_pfnNvAPI_GetDisplayDriverVersion = (NvAPI_GetDisplayDriverVersionType)m_pfnNvapi_QueryInterface(ID_NvAPI_GetDisplayDriverVersion);
            m_pfnNvAPI_GetInterfaceVersionString = (NvAPI_GetInterfaceVersionStringType)m_pfnNvapi_QueryInterface(ID_NvAPI_GetInterfaceVersionString);
            m_pfnNvAPI_GPU_GetPCIIdentifiers = (NvAPI_GPU_GetPCIIdentifiersType)m_pfnNvapi_QueryInterface(ID_NvAPI_GPU_GetPCIIdentifiers);

            if (m_pfnNvAPI_Initialize)
            {
                nResult = m_pfnNvAPI_Initialize();
                if (enumNvStatus_OK == nResult)
                {
                    m_pDisplayCards = new DISPLAY_CARD_INFO[MAX_DISPLAY_CARDS];
                    ZeroMemory(m_pDisplayCards, MAX_DISPLAY_CARDS * sizeof(DISPLAY_CARD_INFO));

                    // 获取显卡个数
                    nResult = EnumDisplayCards();
                    MY_PROCESS_ERROR(nResult > 0);

                    // 获取每块显卡的GPU个数
                    for (nIndex = 0; nIndex < m_nDisplayCardCount; ++nIndex)
                    {
                        bRetCode = GetGpuHandles(m_pDisplayCards[nIndex].nvDisplayHandle, &m_pDisplayCards[nIndex]);
                        MY_PROCESS_ERROR(bRetCode);
                    }

                    bResult = TRUE;
                }
            }
        }
    }
Exit0:
    return bResult;
}

BOOL KGpuMon::Unit()
{
    m_nDisplayCardCount = 0;

    if (m_pDisplayCards)
    {
        delete []m_pDisplayCards;
        m_pDisplayCards = NULL;
    }

    if (m_hNvApiDll)
    {
        FreeLibrary(m_hNvApiDll);
        m_hNvApiDll = NULL;
    }

    return TRUE;
}

BOOL KGpuMon::GetDisplayInfo(const int nCardIndex, DISPLAY_INFO *pDisplayInfo)
{
    BOOL bResult = FALSE;

    int nIndex = 0;

    if (nCardIndex < m_nDisplayCardCount)
    {
        bResult = GetDisplayCardGpuUsages(m_pDisplayCards[nCardIndex].nvDisplayHandle, &m_pDisplayCards[nCardIndex]);
        MY_PROCESS_ERROR(bResult);

        pDisplayInfo->nGpuCount = m_pDisplayCards[nCardIndex].nGpuCount;
        for (nIndex = 0; nIndex < pDisplayInfo->nGpuCount; ++nIndex)
        {
            pDisplayInfo->nGpuUsages[nIndex] = m_pDisplayCards[nCardIndex].sGpuInfo[nIndex].nUsage;
        }

        bResult = GetDisplayCardMemoryInfo(m_pDisplayCards[nCardIndex].nvDisplayHandle, &m_pDisplayCards[nCardIndex]);
        MY_PROCESS_ERROR(bResult);

        pDisplayInfo->dwTotalMemory = m_pDisplayCards[nCardIndex].dwTotalMemory;
        pDisplayInfo->dwFreeMemory = m_pDisplayCards[nCardIndex].dwFreeMemory;
    }
Exit0:
    return bResult;
}

int KGpuMon::GetDisplayCardCount()
{
    return m_nDisplayCardCount;
}

int KGpuMon::EnumDisplayCards()
{
    NvStatus nvResult;
    NvDisplayHandle nvDisplayCardHandle;

    int nIndex = 0;

    m_nDisplayCardCount = 0;
    if (m_pfnNvAPI_EnumNvidiaDisplayHandle)
    {
        for (nIndex = 0; nIndex < MAX_DISPLAY_CARDS; ++nIndex)
        {
            nvResult = m_pfnNvAPI_EnumNvidiaDisplayHandle(nIndex, &nvDisplayCardHandle);
            if (enumNvStatus_OK == nvResult)
            {
                m_pDisplayCards[m_nDisplayCardCount].nvDisplayHandle = nvDisplayCardHandle;
                ++m_nDisplayCardCount;
            }
        }
    }

    return m_nDisplayCardCount;
}

BOOL KGpuMon::GetGpuHandles(const NvDisplayHandle nvDisplayHandle, DISPLAY_CARD_INFO *pCardInfo)
{
    BOOL bResult = FALSE;

    NvStatus nvStatus;
    NvPhysicalGpuHandle *pnvHandles = NULL;

    int nIndex = 0;
    unsigned int uiGpuCount = 0;

    if (m_pfnNvAPI_GetPhysicalGPUsFromDisplay)
    {
        pnvHandles = new NvPhysicalGpuHandle[MAX_PHYSICAL_GPUS];
        nvStatus = m_pfnNvAPI_GetPhysicalGPUsFromDisplay(nvDisplayHandle, pnvHandles, &uiGpuCount);
        if (enumNvStatus_OK == nvStatus)
        {
            pCardInfo->nGpuCount = min(uiGpuCount, MAX_GPU_NUM);
            for (nIndex = 0; nIndex < pCardInfo->nGpuCount; ++nIndex)
            {
                pCardInfo->sGpuInfo[nIndex].nvGpuHandle = pnvHandles[nIndex];
            }

            bResult = TRUE;
        }

        delete []pnvHandles;
        pnvHandles = NULL;
    }

    return bResult;
}

BOOL KGpuMon::GetDisplayCardGpuUsages(const NvDisplayHandle nvDisplayHandle, DISPLAY_CARD_INFO *pCardInfo)
{
    BOOL bResult = FALSE;

    int nIndex = 0;

    NvStatus nvStatus = enumNvStatus_ERROR;
    NvUsages *pnvUsages = NULL;

    if (m_pfnNvAPI_GPU_GetUsages)
    {
        pnvUsages = new NvUsages;
        pnvUsages->Version = GPU_USAGES_VER;
        for (nIndex = 0; nIndex < pCardInfo->nGpuCount; ++nIndex)
        {
            nvStatus = m_pfnNvAPI_GPU_GetUsages(pCardInfo->sGpuInfo[nIndex].nvGpuHandle, pnvUsages);
            if (enumNvStatus_OK == nvStatus)
            {
                pCardInfo->sGpuInfo[nIndex].nUsage = pnvUsages->Usages[2];
            }
        }

        delete pnvUsages;
        pnvUsages = NULL;

        bResult = (enumNvStatus_OK == nvStatus) ? TRUE : FALSE;
    }

    return bResult;
}

BOOL KGpuMon::GetDisplayCardMemoryInfo(const NvDisplayHandle nvDisplayHandle, DISPLAY_CARD_INFO *pCardInfo)
{
    BOOL bResult = FALSE;

    int nIndex = 0;

    NvStatus nvStatus = enumNvStatus_ERROR;
    NvUsages *pnvUsages = NULL;
    NvMemoryInfo sMemoryInfo;

    if (m_pfnNvAPI_GPU_GetMemoryInfo)
    {
        sMemoryInfo.Version = GPU_MEMORY_INFO_VER;
        nvStatus = m_pfnNvAPI_GPU_GetMemoryInfo(nvDisplayHandle, &sMemoryInfo);
        if (enumNvStatus_OK == nvStatus)
        {
            pCardInfo->dwTotalMemory = (DWORD)(sMemoryInfo.Values[0]);
            pCardInfo->dwFreeMemory = (DWORD)(sMemoryInfo.Values[4]);

            bResult = TRUE;
        }
    }

    return bResult;
}

// 컴퓨터 각종 부품 정보 알아내기
std::wstring GetProcessorName()
{
	wchar_t Cpu_info[100];  
    HKEY hKey;  
    int i = 0;
    long result = 0;  
    DWORD c_size = sizeof(Cpu_info);  

//레지스트리를 조사하여 프로세서의 모델명을 얻어냅니다.
    RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"Hardware\\Description\\System\\CentralProcessor\\0", 0, KEY_QUERY_VALUE, &hKey);         
    RegQueryValueEx(hKey, L"ProcessorNameString", NULL, NULL, (LPBYTE)Cpu_info, &c_size);  
    RegCloseKey(hKey);

//GetSystemInfo 함수를 이용해 논리적 코어 개수를 얻어냅니다.
	wchar_t num[8];
	SYSTEM_INFO systemInfo;
	GetSystemInfo(&systemInfo);
	swprintf(num, 8, L" * %d", systemInfo.dwNumberOfProcessors);
	wcscat_s(Cpu_info, 100, num);
	return Cpu_info;
}

std::wstring GetOSName()
{  
    wchar_t ProductName[100];  
    wchar_t CSDVersion[100];  
    std::wstring Os_info;  
  
    HKEY hKey;  
    int i = 0;  
      
    DWORD c_size = 100;  
      
//레지스트리를 조사하여 운영체제 이름을 조사합니다.
    if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\", 0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS)
	{
        return L"Fail to Open OS_info";  
	}
    if(RegQueryValueEx(hKey, L"ProductName", NULL, NULL, (LPBYTE)ProductName, &c_size) != ERROR_SUCCESS)
	{
        return L"Fail to Load the ProductName";
	}
    if(RegQueryValueEx(hKey, L"CSDVersion", NULL, NULL, (LPBYTE)CSDVersion, &c_size) != ERROR_SUCCESS) 
    {  
        RegCloseKey(hKey);
        return ProductName;
    }
  
    Os_info = ProductName;
    Os_info += L" ";
    Os_info += CSDVersion;
  
    RegCloseKey(hKey);
  
    return Os_info;
}

std::string GetMemoryInfo()
{
//GlobalMemoryStatusEX 함수를 이용해 물리적 메모리양을 조사합니다.
	MEMORYSTATUSEX ms;
	ms.dwLength = sizeof(MEMORYSTATUSEX);
	GlobalMemoryStatusEx(&ms);
	char mss[128];
	sprintf_s(mss, 128, "%d MB", ms.ullTotalPhys / 1024 / 1024);
	return mss;
}

std::string GetGPUInfo(LPDIRECT3D9 d3d)
{
//IDirect3D9 인터페이스를 이용해 GPU모델명을 얻어냅니다.
	D3DADAPTER_IDENTIFIER9 id;
	d3d->GetAdapterIdentifier(D3DADAPTER_DEFAULT, 0, &id);
	return id.Description;
}

// Use to convert bytes to KB
#define DIV 1024

// Specify the width of the field in which to print the numbers. 
// The asterisk in the format specifier "%*I64d" takes an integer 
// argument and uses it to pad and right justify the number.
#define WIDTH 7

void _tmain()
{
  MEMORYSTATUSEX statex;

  statex.dwLength = sizeof (statex);

  GlobalMemoryStatusEx (&statex);

  _tprintf (TEXT("There is  %*ld percent of memory in use.\n"),
            WIDTH, statex.dwMemoryLoad);
  _tprintf (TEXT("There are %*I64d total KB of physical memory.\n"),
            WIDTH, statex.ullTotalPhys/DIV);
  _tprintf (TEXT("There are %*I64d free  KB of physical memory.\n"),
            WIDTH, statex.ullAvailPhys/DIV);
  _tprintf (TEXT("There are %*I64d total KB of paging file.\n"),
            WIDTH, statex.ullTotalPageFile/DIV);
  _tprintf (TEXT("There are %*I64d free  KB of paging file.\n"),
            WIDTH, statex.ullAvailPageFile/DIV);
  _tprintf (TEXT("There are %*I64d total KB of virtual memory.\n"),
            WIDTH, statex.ullTotalVirtual/DIV);
  _tprintf (TEXT("There are %*I64d free  KB of virtual memory.\n"),
            WIDTH, statex.ullAvailVirtual/DIV);

  // Show the amount of extended memory available.

  _tprintf (TEXT("There are %*I64d free  KB of extended memory.\n"),
            WIDTH, statex.ullAvailExtendedVirtual/DIV);
}

http://www.microsoft.com/korea/msdn/columns/contents/CodeSecure/secure05202002/default.aspx

메모리를 검색합니다. 
어떻게 szName 과 cbName이 유효하다는 것을 알게 되었습니까? 사용자가 올바른 값을 제공한다고 믿으십니까? 일반적으로 대답은 아니요입니다. 버퍼 크기가 올바른지 확인할 수 있는 간단한 방법은 메모리를 검색하는 것입니다. 다음 코드 조각은 코드의 디버그 버전에서 이를 수행할 수 있는 방법을 보여줍니다. 

void Function(char *szName, DWORD cbName) {
   char szBuff[MAX_NAME];
   
#ifdef _DEBUG

   // 검색
   memset(szBuff, 0x42, cbName);
#endif

   // szName 복사 및 사용
   if (cbName < MAX_NAME)
      strncpy(szBuff,szName,MAX_NAME-1);
}

이 코드에서는 대상 버퍼에 0x42 값을 씁니다. 버퍼를 복사하는 대신 이렇게 하는 이유가 의아할 것입니다. 대상 버퍼 끝에 알려진 고정된 값을 쓰면 소스 버퍼가 너무 클 경우 코드가 실패할 수 있습니다. 개발 프로세스 초기에 개발 버그를 찾을 수도 있습니다. 공격자의 악의적인 부분을 실행하는 대신 실패로 끝나는 것이 더 낫습니다. 이 때문에 공격자의 버퍼를 복사하지 않으려는 것입니다. 

참고   테스트 중에 버퍼 오버런을 가져오는 것을 도와주기 위해 디버그 빌드에서만 이를 수행해야 합니다. 

http://msdn.microsoft.com/ko-kr/library/t48aek43.aspx

http://msdn.microsoft.com/ko-kr/library/zf0e8s14.aspx

atl이나 atlport를 디버깅 할 때 해당 컨테이너의 값을 보기가 힘든데

autoexp.data 를 수정하면 보기 편하게 바꿀수 있다.

autoexp.dat

//컴포넌트 기반 싱글톤
//-------------------------------------------------------------------------------------------

using UnityEngine;

public class MySingleton : MonoBehaviour
{
    private static MySingleton instance;
	
    public static MySingleton Instance
    {
        get
        {
            if ( instance == null )
               instance = new GameObject("MySingleton").AddComponent( );

            return instance;
        }
    }

    public void OnApplicationQuit( ) 
    {
        instance = null;
    }
}


//-------------------------------------------------------------------------------------------
//사용 예)

public class MySingleton
{
    private static MySingleton instance; // 인스턴스 

    public MySingleton( )
    {
        if ( instance != null )
        {
            Debug.LogError( "Can't have two instances of singleton !!" );
            return;
        }
        instance = this;
    } 

    public static MySingleton Instance
    {
        get
        {
            if ( instance == null )
               new MySingleton( ); //첫 인스턴스 생성 

            return instance;
        }
    } 

    private int score;    // 내부 데이터 변수

    public int Score
    {
        get {
            return scroe;
        } set {
            score = value;
        }
    }
}

//-------------------------------------------------------------------------------------------
MySingleton.Instance.Score += 9;
Debug.Log( "Score is now: " + MySingleton.Instance.Score );
 

//템플릿 기반 싱글톤
//-------------------------------------------------------------------------------------------

using UnityEngine;

public abstract class MonoSingleton< T > : MonoBehaviour where T : MonoSingleton< T >
{
    private static T m_Instance = null;

    public static T instance
    {
        get
        {
            if ( m_Instance == null )
            {
                m_Instance = GameObject.FindObjectOfType( typeof(T) ) as T; 

                if ( m_Instance == null)
                   Debug.LogError( "No instance of " + typeof(T).ToString( ) ); 

                m_Instance.Init( );
             }
            return m_Instance;
        }
    } 

    private void Awake( )
    {
        if ( m_Instance == null )
        {
            m_Instance = this as T;
            m_Instance.Init( );
        }
    } 

    public virtual void Init( ) { } // 초기화를 상속을 통해 구현    

    private void OnApplicationQuit( )
    {
        m_Instance = null;
    }
}

//-------------------------------------------------------------------------------------------
//사용 예)

GameManager.cs 

public class GameManager : MonoSingleton< GameManager >
{
    public int difficulty = 0;
    public override void Init( ) { difficulty = 5; }
}

//-------------------------------------------------------------------------------------------
OtherClass.cs 

using UnityEngine;
public class OtherClass : MonoBehaviour
{
    void Start( ) 
    { 
        print( GameManager.instance.difficulty ); 
    }
}

using System;

public sealed class Singleton
{
   private static volatile Singleton instance;
   private static object syncRoot = new Object();

   private Singleton() {}

   public static Singleton Instance
   {
      get 
      {
         if (instance == null) 
         {
            lock (syncRoot) 
            {
               if (instance == null) 
                  instance = new Singleton();
            }
         }

         return instance;
      }
   }
}

2. In Unity Editor go to Edit->Preferences->External Tools and In External Script Editor choose Browse from the drop down box.
3. Browse to and select C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\devenv.exe.
4. The External Script Editor should automatically show your selected editor as Visual Studio 2013.
5. That’s it! It should just work from that point on.
6. 
   
7. Edit->Preferences->External Tools
8. 
   
9. 
   
10. 플러그인 설치 http://unityvs.com/
11. "UnityVS_1.8.1-2013"
13.  - Copy SyntaxTree.VisualStudio.Packages.dll to:
14.  C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\Extensions\SyntaxTree\UnityVS