OpenSpeedy/cpuutils.cpp at master · Jesae/OpenSpeedy · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
#include "cpuutils.h"

CpuUtils::CpuUtils() {}

bool CpuUtils::init()
{
    // 创建查询
    if (PdhOpenQuery(NULL, NULL, &hQuery) != ERROR_SUCCESS) return false;

    if (PdhAddEnglishCounter(hQuery, L"\\Processor(_Total)\\% Processor Time",
                             NULL, &hCounter) != ERROR_SUCCESS)
    {
        PdhCloseQuery(hQuery);
        return false;
    }

    // 第一次采样
    PdhCollectQueryData(hQuery);
    initialized = true;
    return true;
}

double CpuUtils::getUsage()
{
    if (!initialized) return -1;

    // 收集数据
    if (PdhCollectQueryData(hQuery) != ERROR_SUCCESS) return -1;

    PDH_FMT_COUNTERVALUE value;
    if (PdhGetFormattedCounterValue(hCounter, PDH_FMT_DOUBLE, NULL, &value) !=
        ERROR_SUCCESS)
        return -1;

    return value.doubleValue;
}

QString CpuUtils::getModel()
{
    int cpuInfo[4];
    char cpuBrand[48 + 1] = {0};

    // 获取CPU品牌字符串（需要调用3次CPUID）
    __cpuid(cpuInfo, 0x80000002);
    memcpy(cpuBrand, cpuInfo, sizeof(cpuInfo));

    __cpuid(cpuInfo, 0x80000003);
    memcpy(cpuBrand + 16, cpuInfo, sizeof(cpuInfo));

    __cpuid(cpuInfo, 0x80000004);
    memcpy(cpuBrand + 32, cpuInfo, sizeof(cpuInfo));

    QString result(cpuBrand);

    return result.trimmed();
}

CpuUtils::~CpuUtils()
{
    if (hCounter) PdhRemoveCounter(hCounter);
    if (hQuery) PdhCloseQuery(hQuery);
}