- CPU核心數(shù)
- SOC型號(hào)
- GPU溫度
- 主板溫度
- 系統(tǒng)運(yùn)行時(shí)間
- RAM總內(nèi)存
- RAM可用內(nèi)存
- RAM空閑內(nèi)存
- 緩存使用內(nèi)存
- Swaps交換分區(qū)
- 系統(tǒng)啟動(dòng)以來(lái)創(chuàng)建的進(jìn)程數(shù)
- 上下文切換的總數(shù)
- SOC溫度
- CPU利用率
- CPU大核7溫度和利用率
- CPU中核6溫度和利用率
- CPU中核5溫度和利用率
- CPU中核4溫度和利用率
- CPU小核3溫度和利用率
- CPU小核2溫度和利用率
- CPU小核1溫度和利用率
- CPU小核0溫度和利用率
- 設(shè)備電量
- 電池電壓
- 電池型號(hào)
- 電池充電狀態(tài)
- 系統(tǒng)版本
- RTC時(shí)間和日期
- 內(nèi)核版本信息
- 電池信息

# 獲取SOC型號(hào)
proc/device-tree/cpuinfo_hardware 

# 獲取rtc時(shí)間
/sys/class/rtc/rtc0/time

# 獲取內(nèi)核信息
/proc/version

# 獲取RTC系統(tǒng)日期
/sys/class/rtc/rtc0/date

# 交換分區(qū)大小
/proc/swaps

# 獲取主板熱區(qū)
/sys/class/thermal/thermal_zone27/temp

# 獲取GPU熱區(qū)
/sys/class/thermal/thermal_zone17/temp

# 獲取lit0-thmzone 小核心 0 熱區(qū)
/sys/class/thermal/thermal_zone13/temp

# 獲取lit1-thmzone 小核心 1 熱區(qū)
/sys/class/thermal/thermal_zone14/temp

# 獲取lit2-thmzone 小核心 2 熱區(qū)
/sys/class/thermal/thermal_zone15/temp

# 獲取lit3-thmzone 小核心 3 熱區(qū)
/sys/class/thermal/thermal_zone16/temp

# 獲取mid4-thmzone 中核心 4 熱區(qū)
/sys/class/thermal/thermal_zone9/temp

# 獲取mid5-thmzone 中核心 5 熱區(qū)
/sys/class/thermal/thermal_zone10/temp

# 獲取mid6-thmzone 中核心 6 熱區(qū)
/sys/class/thermal/thermal_zone11/temp

# 獲取big7-thmzone 大核心 7 熱區(qū)
/sys/class/thermal/thermal_zone7/temp

# 獲取soc-thmzone系統(tǒng)芯片熱區(qū) 
/sys/class/thermal/thermal_zone5/temp

# /proc/uptime 是一個(gè)特殊的文件，它提供了當(dāng)前系統(tǒng)的運(yùn)行時(shí)間信息。文件中包含了兩個(gè)數(shù)值，分別表示系統(tǒng)的總運(yùn)行時(shí)間和空閑時(shí)間。
/proc/uptime

# 獲取內(nèi)存信息
/proc/meminfo

# 獲取cpu info
/proc/cpuinfo

# 計(jì)算cpu利用率，進(jìn)程計(jì)數(shù)器，正在運(yùn)行的進(jìn)程計(jì)數(shù)器，阻塞的進(jìn)程計(jì)數(shù)器，系統(tǒng)發(fā)生的上下文切換次數(shù)
/proc/stat

export const getCpuCount: () => Number;                  //獲取cpu核心數(shù)
export const getMemTotal: () => String;                  //獲取RAM總內(nèi)存大小
export const getFreeMem: () => String;                   //獲取空閑內(nèi)存大小
export const getCachedMem: () => String;                 //獲取緩存使用內(nèi)存大小
export const getAvailableMem: () => String;              //獲取可用內(nèi)存大小
export const getCpuInfo: () => any;                      //獲取CPU信息
export const getMemoryInfo: () => any;                   //獲取RAM信息
export const getUptime: () => String;                    //讀取/proc/uptime，/proc/uptime 是一個(gè)特殊的文件，它提供了當(dāng)前系統(tǒng)的運(yùn)行時(shí)間信息。文件中包含了兩個(gè)數(shù)值，分別表示系統(tǒng)的總運(yùn)行時(shí)間和空閑時(shí)間。
export const getSOCtemp: () => String;                   //獲取soc-thmzone系統(tǒng)芯片熱區(qū) /sys/class/thermal/thermal_zone5/temp
export const getCPU_CORE_big7_thmzonetemp: () => String; //獲取big7-thmzone 大核心 7 熱區(qū)
export const getCPU_CORE_mid6_thmzonetemp: () => String; //獲取mid6-thmzone 中核心 6 熱區(qū)
export const getCPU_CORE_mid5_thmzonetemp: () => String; //獲取mid6-thmzone 中核心 5 熱區(qū)
export const getCPU_CORE_mid4_thmzonetemp: () => String; //獲取mid6-thmzone 中核心 4 熱區(qū)
export const getCPU_CORE_lit3_thmzonetemp: () => String; //獲取lit3-thmzone 小核心 3 熱區(qū)
export const getCPU_CORE_lit2_thmzonetemp: () => String; //獲取lit2-thmzone 小核心 2 熱區(qū)
export const getCPU_CORE_lit1_thmzonetemp: () => String; //獲取lit1-thmzone 小核心 1 熱區(qū)
export const getCPU_CORE_lit0_thmzonetemp: () => String; //獲取lit0-thmzone 小核心 0 熱區(qū)
export const getGPU_temp: () => String;                  //獲取GPU 熱區(qū)
export const getBoard_temp: () => String;                //獲取主板 熱區(qū)
export const getSwaps: () => String;                     //獲取交換分區(qū)大小
export const getRTC_Date_temp: () => String;             //獲取rtc日期
export const getKernel_version: () => String;            //獲取內(nèi)核信息
export const getRTC_Time_temp: () => String;             //獲取rtc時(shí)間
export const getCpu_stat_cpu: () => String;              //獲取cpu以及各個(gè)核利用率
export const getprocesses: () => String;                 //獲取正在運(yùn)行的進(jìn)程數(shù)
export const getctxt: () => String;                      //獲取正在運(yùn)行的進(jìn)程數(shù)
export const getcpuinfo_hardware: () => String;          //獲取SOC型號(hào)

Index.ets

import window from '@ohos.window';
import common from '@ohos.app.ability.common';

  //沉浸式界面開(kāi)發(fā):https://gitee.com/openharmony/docs/blob/master/zh-cn/third-party-cases/immersion-mode.md#%E5%8F%82%E8%80%83
  context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext
  async setSystemBar() {

    let windowClass = await window.getLastWindow(this.context)
    //設(shè)置導(dǎo)航欄，狀態(tài)欄不可見(jiàn)
    /*
     * let names: Array<'status' | 'navigation'> = ['navigation'];//設(shè)置頂部狀態(tài)欄不可見(jiàn)
     * let names: Array<'status' | 'navigation'> = ['status'];//設(shè)置底部導(dǎo)航欄不可見(jiàn)
     * let names: Array<'status' | 'navigation'> = [];//設(shè)置
    */
    let names: Array<'status' | 'navigation'> = ["navigation"];
    await windowClass.setWindowSystemBarEnable(names)
  }

aboutToAppear() {

this.setSystemBar()

}

TestStatisticsInfo.cpp

// proc/device-tree/cpuinfo_hardware
// 查看SOC型號(hào)
napi_value TestStatisticsInfo::Getcpuinfo_hardware(napi_env env, napi_callback_info info) {
    if ((nullptr == env) || (nullptr == info)) {
        LOGE("TestStatisticsInfo::Getcpuinfo_hardware: env or info is null");
        return nullptr;
    }

    napi_value thisArg;
    if (napi_ok != napi_get_cb_info(env, info, nullptr, nullptr, &thisArg, nullptr)) {
        LOGE("TestStatisticsInfo::Getcpuinfo_hardware: napi_get_cb_info fail");
        return nullptr;
    }
    std::string time = getcpuinfo_hardware();
    LOGI("getcpuinfo_hardware success! %{public}s", time.c_str());
    napi_value res;
    napi_create_string_utf8(env, time.c_str(), strlen(time.c_str()), &res);
    return res;
}

std::string TestStatisticsInfo::getcpuinfo_hardware() {

    FILE *fp0 = fopen("proc/device-tree/cpuinfo_hardware", "r");
    if (NULL == fp0) {
        LOGE("TestStatisticsInfo:getcpuinfo_hardware failed to open cpuinfo =======");
        return 0;
    }
    std::string temp0 = "";
    char buffer0[1024]{};
    fgets(buffer0, sizeof(buffer0), fp0);
    temp0.assign(buffer0); // 將buffer轉(zhuǎn)換為字符串類型并賦值給time。
    LOGE("TestStatisticsInfo::getcpuinfo_hardware %{public}d =======", buffer0);
    fclose(fp0);

    return temp0;
}

index.d.ts

export const getcpuinfo_hardware: () => String;          //獲取SOC型號(hào)

@State cpuinfo_hardware: String = '';

  //aboutToAppear函數(shù)在創(chuàng)建自定義組件的新實(shí)例后，在執(zhí)行其build()函數(shù)之前執(zhí)行。允許在aboutToAppear函數(shù)中改變狀態(tài)變量，更改將在后續(xù)執(zhí)行build()函數(shù)中生效。
  aboutToAppear() {

    //getcpuinfo_hardware
    this.cpuinfo_hardware = testStatisticsApi.getcpuinfo_hardware();
    console.log("========Cpu_stat_cpu is ",this.cpuinfo_hardware)

}

# cat proc/stat
cpu  136846 473 429582 992274 115 40307 14266 0 0 0
cpu0 37440 30 120671 435245 107 10714 3552 0 0 0
cpu1 35618 28 108085 58002 1 8694 3314 0 0 0
cpu2 17470 20 58705 74576 6 8023 3100 0 0 0
cpu3 13264 13 53196 77765 0 7046 2920 0 0 0
cpu4 12691 121 33814 81271 0 2239 554 0 0 0
cpu5 12134 134 34550 84395 0 2245 444 0 0 0
cpu6 5407 83 14615 87894 0 1123 236 0 0 0
cpu7 2819 41 5944 93124 0 219 143 0 0 0
intr 28465308 0 303012 15607597 0 0 926124 2759258 0 0 0 0 6706602 0 0 0 0 0 0 0 0 0 0 0 0 0 1506 0 0 0 69 0 734 0 20 302 26293 19428 358 11614 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 49979 0 0 0 0 0 0 1916 0 0 0 0 0 0 1477101 13 0 225612 3534 0 0 0 0 0 105 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 62 8 51 3 0 0 0 0 0 0 0 0 0 2 0 0 49 0 341969 17 30 0 1933
ctxt 45507242
btime 534
processes 6746
procs_running 5
procs_blocked 0
softirq 7457395 112 685658 199 4997 15826 0 3684 2582028 0 4164891

TestStatisticsInfo.cpp

std::string TestStatisticsInfo::getCpu_stat(std::string field) {

    std::ifstream meminfo("/proc/stat");
    std::string line;
    std::string cpu0Field = "cpu0";
    std::string cpu1Field = "cpu1";
    std::string cpu2Field = "cpu2";
    std::string cpu3Field = "cpu3";
    std::string cpu4Field = "cpu4";
    std::string cpu5Field = "cpu5";
    std::string cpu6Field = "cpu6";
    std::string cpu7Field = "cpu7";
    std::string cpuField = "cpu\u0020";
    std::string processesField = "processes"; // processes: 進(jìn)程計(jì)數(shù)器統(tǒng)計(jì)。這個(gè)字段表示當(dāng)前運(yùn)行的進(jìn)程數(shù)量。
    std::string procs_runningField = "procs_running"; //procs_running: 正在運(yùn)行的進(jìn)程計(jì)數(shù)器統(tǒng)計(jì)。這個(gè)字段表示當(dāng)前正在運(yùn)行的進(jìn)程數(shù)量。
    std::string procs_blockedField = "procs_blocked";//procs_blocked: 阻塞的進(jìn)程計(jì)數(shù)器統(tǒng)計(jì)。這個(gè)字段表示當(dāng)前被阻塞的進(jìn)程數(shù)量。
    std::string ctxtField = "ctxt";//上下文切換計(jì)數(shù)器統(tǒng)計(jì)。這個(gè)字段表示系統(tǒng)發(fā)生的上下文切換次數(shù)，可以用于評(píng)估系統(tǒng)的調(diào)度性能。
    while (getline(meminfo, line)) {
        if (line.find(processesField) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[processesField] = res;
        } 
        if (line.find(procs_runningField) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[procs_runningField] = res;
        }
        if (line.find(procs_blockedField) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[procs_blockedField] = res;
        }
        if (line.find(ctxtField) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[ctxtField] = res;
        }
        if (line.find(cpu7Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu7Field] = res;
        }
        if (line.find(cpu6Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu6Field] = res;
        }
        if (line.find(cpu5Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu5Field] = res;
        }
        if (line.find(cpu4Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu4Field] = res;
        }
        if (line.find(cpu3Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu3Field] = res;
        }
        if (line.find(cpu2Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu2Field] = res;
        }
        if (line.find(cpu1Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu1Field] = res;
        }
        if (line.find(cpu0Field) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpu0Field] = res;
        }
        if (line.find(cpuField) != std::string::npos) {
            std::string res = line;
            _Cpu_stat[cpuField] = res;
        }
    }
    return _Cpu_stat[field];
}

# cat proc/stat
cpu  136846 473 429582 992274 115 40307 14266 0 0 0
cpu0 37440 30 120671 435245 107 10714 3552 0 0 0
cpu1 35618 28 108085 58002 1 8694 3314 0 0 0
cpu2 17470 20 58705 74576 6 8023 3100 0 0 0
cpu3 13264 13 53196 77765 0 7046 2920 0 0 0
cpu4 12691 121 33814 81271 0 2239 554 0 0 0
cpu5 12134 134 34550 84395 0 2245 444 0 0 0
cpu6 5407 83 14615 87894 0 1123 236 0 0 0
cpu7 2819 41 5944 93124 0 219 143 0 0 0

cpu: 總體統(tǒng)計(jì)信息
cpu0、cpu1、cpu2、等等：各個(gè) CPU 核心的統(tǒng)計(jì)信息
user: 用戶模式下運(yùn)行時(shí)間
nice: 優(yōu)先級(jí)較低的用戶模式下運(yùn)行時(shí)間
system: 內(nèi)核模式下運(yùn)行時(shí)間
idle: 空閑時(shí)間
iowait: 等待輸入/輸出完成的時(shí)間
irq: 處理硬件中斷的時(shí)間
softirq: 處理軟件中斷的時(shí)間
steal: 被虛擬化主機(jī)偷取的時(shí)間
guest: 運(yùn)行虛擬 CPU 的時(shí)間
guest_nice: 運(yùn)行虛擬 CPU 且優(yōu)先級(jí)較低的時(shí)間

在 /proc/stat 文件中，CPU 利用率的時(shí)間單位是“時(shí)鐘滴答”（clock ticks）。每個(gè) Linux 系統(tǒng)都有一個(gè)時(shí)鐘線程（clock tick），它以固定的速率生成時(shí)鐘滴答來(lái)驅(qū)動(dòng)系統(tǒng)的計(jì)時(shí)器。時(shí)鐘滴答的大小依賴于系統(tǒng)的硬件和配置。它通常以毫秒（ms）為單位，但也可能以微秒（μs）或納秒（ns）為單位，具體取決于系統(tǒng)。要獲取實(shí)際的時(shí)間單位，你可以查看 /proc/timer_list 或 /proc/timer_stats 文件中的信息。需要注意的是，這些時(shí)鐘滴答并不是以獨(dú)立的單位存在的，它們僅用于相對(duì)測(cè)量和計(jì)算 CPU 的利用率。因此，在分析 CPU 利用率時(shí)，我們通常關(guān)注的是兩個(gè)時(shí)間點(diǎn)之間的差異，而不是實(shí)際的時(shí)鐘滴答值本身。

TestStatisticsInfo.cpp

//計(jì)算cpu利用率
std::string TestStatisticsInfo::calculateCpuUtilization(std::string& a,std::string& a_second) {
    std::istringstream iss_a(a);
    std::istringstream iss_a_second(a_second);

    // 提取每個(gè)字段的值
    std::string cpu_name, cpu_name_second;
    int user, nice, system, idle, iowait, irq, softirq, steal, guest, guest_nice;
    int user_second, nice_second, system_second, idle_second, iowait_second, irq_second, softirq_second, steal_second,
        guest_second, guest_nice_second;

    iss_a >> cpu_name >> user >> nice >> system >> idle >> iowait >> irq >> softirq >> steal >> guest >> guest_nice;
    iss_a_second >> cpu_name_second >> user_second >> nice_second >> system_second >> idle_second >> iowait_second >>
        irq_second >> softirq_second >> steal_second >> guest_second >> guest_nice_second;

    // 計(jì)算總的 CPU 時(shí)間和空閑 CPU 時(shí)間
    int total_time = user + nice + system + idle + iowait + irq + softirq + steal;
    int total_time_second = user_second + nice_second + system_second + idle_second + iowait_second + irq_second +
                            softirq_second + steal_second;
    int idle_time = idle + iowait;
    int idle_time_second = idle_second + iowait_second;

    // 計(jì)算 CPU 利用率
    double cpu_utilization =
        100.0 * (1.0 - (idle_time_second - idle_time) / static_cast<double>(total_time_second - total_time));
    
    return std::to_string(cpu_utilization);
}

// 計(jì)算cpu利用率
napi_value TestStatisticsInfo::GetCpu_stat_cpu(napi_env env, napi_callback_info info) {
    if ((nullptr == env) || (nullptr == info)) {
        LOGE("TestStatisticsInfo::GetCachedMem: env or info is null");
        return nullptr;
    }

    napi_value thisArg;
    if (napi_ok != napi_get_cb_info(env, info, nullptr, nullptr, &thisArg, nullptr)) {
        LOGE("TestStatisticsInfo::GetCpu_stat_cpu: napi_get_cb_info fail");
        return nullptr;
    }
    std::string cpu_cached0 = getCpu_stat("cpu\u0020");
    std::string cpu0_cached0 = getCpu_stat("cpu0");
    std::string cpu1_cached0 = getCpu_stat("cpu1");
    std::string cpu2_cached0 = getCpu_stat("cpu2");
    std::string cpu3_cached0 = getCpu_stat("cpu3");
    std::string cpu4_cached0 = getCpu_stat("cpu4");
    std::string cpu5_cached0 = getCpu_stat("cpu5");
    std::string cpu6_cached0 = getCpu_stat("cpu6");
    std::string cpu7_cached0 = getCpu_stat("cpu7");
    
    std::this_thread::sleep_for(std::chrono::milliseconds(100)); // 延時(shí) 100 毫秒
    
    std::string cpu_cached1 = getCpu_stat("cpu\u0020");
    std::string cpu0_cached1 = getCpu_stat("cpu0");
    std::string cpu1_cached1 = getCpu_stat("cpu1");
    std::string cpu2_cached1 = getCpu_stat("cpu2");
    std::string cpu3_cached1 = getCpu_stat("cpu3");
    std::string cpu4_cached1 = getCpu_stat("cpu4");
    std::string cpu5_cached1 = getCpu_stat("cpu5");
    std::string cpu6_cached1 = getCpu_stat("cpu6");
    std::string cpu7_cached1 = getCpu_stat("cpu7");
    
    std::string cpu = calculateCpuUtilization(cpu_cached0, cpu_cached1);
    std::string cpu0 = calculateCpuUtilization(cpu0_cached0, cpu0_cached1);
    std::string cpu1 = calculateCpuUtilization(cpu1_cached0, cpu1_cached1);
    std::string cpu2 = calculateCpuUtilization(cpu2_cached0, cpu2_cached1);
    std::string cpu3 = calculateCpuUtilization(cpu3_cached0, cpu3_cached1);
    std::string cpu4 = calculateCpuUtilization(cpu4_cached0, cpu4_cached1);
    std::string cpu5 = calculateCpuUtilization(cpu5_cached0, cpu5_cached1);
    std::string cpu6 = calculateCpuUtilization(cpu6_cached0, cpu6_cached1);
    std::string cpu7 = calculateCpuUtilization(cpu7_cached0, cpu7_cached1);
    
    std::string aaa = cpu + " " + cpu0 + " " + cpu1 + " " + cpu2 + " " + cpu3 + " " + cpu4 + " " + cpu5 + " " + cpu6 + " " + cpu7;
    
    LOGI("GetCpu_stat_cpu success! Cached is %{public}s", aaa.c_str());
    napi_value res;
    napi_create_string_utf8(env, aaa.c_str(), strlen(aaa.c_str()), &res);
    return res;
}

index.d.ts

export const getCpu_stat_cpu: () => String;              //獲取cpu以及各個(gè)核利用率

Index.ts

import testStatisticsApi from 'libentry.so';

  @State Cpu_stat_cpu: String = '';

      //getCpu_stat_cpu
      this.Cpu_stat_cpu = testStatisticsApi.getCpu_stat_cpu();
      console.log("========Cpu_stat_cpu is ",this.Cpu_stat_cpu)

        Text(
              "SOC溫度:"+ (Number(this.soctemp)/1000).toFixed(3) +"°C" + "\t\t\t  CPU利用率:" + (Number(this.Cpu_stat_cpu.split(" ")[0])).toFixed(3) +
              "\nCPU大核7溫度:"+(Number(this.CPU_CORE_big7_temp)/1000).toFixed(3) +"°C" + "\tCPU大核7利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[8])).toFixed(3) +
              "\nCPU中核6溫度:"+(Number(this.CPU_CORE_mid6_temp)/1000).toFixed(3) +"°C" + "\tCPU中核6利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[7])).toFixed(3) +
              "\nCPU中核5溫度:"+(Number(this.CPU_CORE_mid5_temp)/1000).toFixed(3) +"°C" + "\tCPU中核5利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[6])).toFixed(3) +
              "\nCPU中核4溫度:"+(Number(this.CPU_CORE_mid4_temp)/1000).toFixed(3) +"°C" + "\tCPU中核4利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[5])).toFixed(3) +
              "\nCPU小核3溫度:"+(Number(this.CPU_CORE_lit3_temp)/1000).toFixed(3) +"°C" + "\tCPU小核3利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[4])).toFixed(3) +
              "\nCPU小核2溫度:"+(Number(this.CPU_CORE_lit2_temp)/1000).toFixed(3) +"°C" + "\tCPU小核2利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[3])).toFixed(3) +
              "\nCPU小核1溫度:"+(Number(this.CPU_CORE_lit1_temp)/1000).toFixed(3) +"°C" + "\tCPU小核1利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[2])).toFixed(3) +
              "\nCPU小核0溫度:"+(Number(this.CPU_CORE_lit0_temp)/1000).toFixed(3) +"°C" + "\tCPU小核0利用率:" +  (Number(this.Cpu_stat_cpu.split(" ")[1])).toFixed(3)
        )

TestStatisticsInfo.cpp

// 獲取proc/stat文件的ctxt: 上下文切換的總數(shù)
napi_value TestStatisticsInfo::Getctxt(napi_env env, napi_callback_info info) {
    if ((nullptr == env) || (nullptr == info)) {
        LOGE("TestStatisticsInfo::Getctxt: env or info is null");
        return nullptr;
    }

    napi_value thisArg;
    if (napi_ok != napi_get_cb_info(env, info, nullptr, nullptr, &thisArg, nullptr)) {
        LOGE("TestStatisticsInfo::Getctxt: napi_get_cb_info fail");
        return nullptr;
    }
    std::string cached = getCpu_stat("ctxt");
    LOGI("getCpu_stat success! Cached is %{public}s", cached.c_str());
    napi_value res;
    napi_create_string_utf8(env, cached.c_str(), strlen(cached.c_str()), &res);
    return res;
}

TestStatisticsInfo.cpp

//獲取proc/stat文件的processes: 啟動(dòng)的進(jìn)程數(shù)
napi_value TestStatisticsInfo::Getprocesses(napi_env env, napi_callback_info info) {
    if ((nullptr == env) || (nullptr == info)) {
        LOGE("TestStatisticsInfo::Getprocesses: env or info is null");
        return nullptr;
    }

    napi_value thisArg;
    if (napi_ok != napi_get_cb_info(env, info, nullptr, nullptr, &thisArg, nullptr)) {
        LOGE("TestStatisticsInfo::Getprocesses: napi_get_cb_info fail");
        return nullptr;
    }
    std::string cached = getCpu_stat("processes");
    LOGI("getCpu_stat success! Cached is %{public}s", cached.c_str());
    napi_value res;
    napi_create_string_utf8(env, cached.c_str(), strlen(cached.c_str()), &res);
    return res;
}