vs2013 获取cpu温度

环境: window7 64位 cpu Intel i3-4170

一、程序运行如下：

i3-4170是双核四线程。我暂时没有找出区分线程数跟核心数的区别。这个问题以后再去解决吧

二、编程前准备 ( 可以直接跳到三、 处，源码中已经有了)
获得cpu温度的方法是读取cpu寄存器。由于windows的保护机制，无法直接使用汇编程序读取寄存器，因此使用了WinRing0库。
下载链接如下:
http://download.youkuaiyun.com/detail/xiufeng_wang/1140396
需要用到的文件如下:
WinRing0.dll
WinRing0.sys
WinRing0x64.dll
WinRing0x64.sys
WinRing0.lib
OlsApi.h

其中WinRing0.lib、OlsApi.h放在编译文件处，其他的需要放在.exe文件夹下。

三、源码如下:
http://download.youkuaiyun.com/detail/jiaowosongsong/9496571

四、源码介绍

先来看看主函数部分（readPcInfo.cpp）
好吧主函数基本什么都没有，还是跳过吧。

#include "stdafx.h"
#include "ReadCpuInfo.h"
//#include "OlsApi.h"
#include <iostream>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
    ReadCpuInfo myCpu;      //生成对象
    //cout << InitializeOls() << endl;;
    //cout << sysInfo.dwNumberOfProcessors << endl;
    //cout << sysInfo.dwActiveProcessorMask << endl;
    while (1)
    {
        myCpu.ReadCpuTemp();    //调用对象函数，读取cpu温度
        //cout << myCpu.cpuTemp[0] << endl;
        myCpu.SysTimeDisplay(); //显示系统时间
        myCpu.CpuTempDisplay();  //显示cpu温度
        Sleep(1000);
        system("cls");
    }
    return 0;
}

运用WinRing0获得cpu温度部分：
1.ReadCpuInfo.h
主要就是加载了WinRing0.lib,函数1和函数2 完成了整个流程；

#pragma once
#include<windows.h>
#include "OlsApi.h"       //头文件
#pragma comment (lib,"WinRing0.lib")   //加载lib
#define CONSOLE_PRINT 1
class ReadCpuInfo
{
private:
    char fileName[30];          
public:
    int cpuTemp[8];
    int coreNumber;              //获得的线程数
    int Tjmax;                  
public:
    ReadCpuInfo();            
    virtual ~ReadCpuInfo();
public:
    //void ReadCpuTempInit();
    void ReadCpuTemp();        //函数2
    void CpuTempDisplay();
    void SysTimeDisplay();
    void clearRecordFile();
private:
    void ReadCpuInfoInit();   //函数1
    void ReadCpuInfoExit();
    void RecordCpuInfo(char *buf);
    int CheckAndPrint(char message[], BOOL flag);
};

2.ReadCpuInfo.cpp 函数实现

#include "stdafx.h"
#include "ReadCpuInfo.h"
#include <string.h>

ReadCpuInfo::ReadCpuInfo()
{
    ReadCpuInfoInit();      //构造函数初始化dll
    strcpy_s(fileName, "CpuInfoRecord.txt");
}


ReadCpuInfo::~ReadCpuInfo()
{
    ReadCpuInfoExit();
}

void ReadCpuInfo::ReadCpuTemp()      //主要函数
{
    for (size_t i = 0; i < coreNumber; i++) //遍历CPU
    {
        int mask =  0x01 << i;         
        SetProcessAffinityMask(GetCurrentProcess(), mask);//设置当前使用线程(CPU)
        DWORD eax, ebx, ecx, edx;
        Rdmsr(0x19c, &eax, &edx);    //读取温度寄存器（eax&0x7f0000可以获得温度数据）
        cpuTemp[i] = Tjmax - ((eax & 0x7f0000) >> 16);//实际温度= Tjmax - 温度数据
    }

}


void ReadCpuInfo::ReadCpuInfoInit()      //初始化
{
    if (true == CheckAndPrint("Init DLL function", InitializeOls()))                   //dll的初始化
    {
        if (true == CheckAndPrint("IsCpuid function", IsCpuid()))                      //判断是否支持Cpuid
        {
            if (true == CheckAndPrint("Ismsr function", IsMsr()))                       //是否支持Rdmsr
            {
                DWORD eax, ebx, ecx, edx;
                Rdmsr(0x1A2, &eax, &edx);   //读取寄存器
                Tjmax = (eax & 0xff0000) >> 16; //获得Tjmax
                //printf("%d\n", Tjmax);                          //show max temperature
                SYSTEM_INFO sysInfo;
                GetSystemInfo(&sysInfo);
                coreNumber = sysInfo.dwNumberOfProcessors;  //获得线程数
                SetProcessAffinityMask(GetCurrentProcess(), 1);    //切换到第一个cpu;
            }
        }
    }
}

void ReadCpuInfo::ReadCpuInfoExit()
{
    DeinitializeOls();
}
int ReadCpuInfo::CheckAndPrint(char message[], BOOL flag)
{
    if (flag)
    {
        printf("%s is checked Enable!\n", message);
        return 1;
    }
    else
    {
        printf("%s is checked unEnabled!\n", message);
        return 0;
    }
}

void ReadCpuInfo::CpuTempDisplay()
{
    for (size_t i = 0; i < coreNumber; i++)
    {
        char buf[1024] = "";
#if (CONSOLE_PRINT)
        printf("Core #%d: %dC\n", i, cpuTemp[i]);
#else
#endif
        sprintf_s(buf, "Core #%d: %dC\n", i, cpuTemp[i]);
        RecordCpuInfo(buf);
    }
}
void ReadCpuInfo::SysTimeDisplay()
{
    clearRecordFile();
    SYSTEMTIME start; //windows.h中   
    GetLocalTime(&start);//time.h的tm结构体一样的效果   
    //printf("%d\n", start.wHour);
#if (CONSOLE_PRINT)
    printf("date: %02d/%02d/%02d\n",
        start.wYear, start.wMonth, start.wDay);
    printf("time: %02d:%02d:%02d\n",
        start.wHour, start.wMinute, start.wSecond);
#else
#endif
    char buf[1024] = "";
    sprintf_s(buf, "date: %02d/%02d/%02d\n", start.wYear, start.wMonth, start.wDay);
    RecordCpuInfo(buf);
    memset(buf, 0, sizeof(buf));

    sprintf_s(buf, "time: %02d:%02d:%02d\n",start.wHour, start.wMinute, start.wSecond);
    RecordCpuInfo(buf);


}

void ReadCpuInfo::RecordCpuInfo(char *buf)
{
    FILE *fp;
    fopen_s(&fp,fileName, "a+");
    if (fp == NULL)
    {
        printf("file open error!\n");
        return;
    }
    else
    {
        fwrite(buf, strlen(buf), 1, fp);
    }
    fclose(fp);

}

void ReadCpuInfo:: clearRecordFile()
{
    FILE *fp;
    fopen_s(&fp,fileName, "w+");
    if (fp == NULL)
    {
        printf("file open error!\n");
        return ;
    }
    fclose(fp);
}

大家看完后估计还是一头雾水，更详细的原理可以看看其他博客:
http://blog.youkuaiyun.com/zhangweilst/article/details/43857371

http://www.tuicool.com/articles/EF7rii