80 lines
2.3 KiB
C++
80 lines
2.3 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "otautil/ThermalUtil.h"
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#include <dirent.h>
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#include <stdio.h>
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#include <algorithm>
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#include <string>
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#include <vector>
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/parseint.h>
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#include <android-base/strings.h>
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static constexpr auto THERMAL_PREFIX = "/sys/class/thermal/";
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static int thermal_filter(const dirent* de) {
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if (android::base::StartsWith(de->d_name, "thermal_zone")) {
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return 1;
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}
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return 0;
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}
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static std::vector<std::string> InitThermalPaths() {
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dirent** namelist;
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int n = scandir(THERMAL_PREFIX, &namelist, thermal_filter, alphasort);
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if (n == -1) {
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PLOG(ERROR) << "Failed to scandir " << THERMAL_PREFIX;
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return {};
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}
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if (n == 0) {
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LOG(ERROR) << "Failed to find CPU thermal info in " << THERMAL_PREFIX;
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return {};
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}
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std::vector<std::string> thermal_paths;
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while (n--) {
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thermal_paths.push_back(THERMAL_PREFIX + std::string(namelist[n]->d_name) + "/temp");
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free(namelist[n]);
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}
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free(namelist);
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return thermal_paths;
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}
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int GetMaxValueFromThermalZone() {
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static std::vector<std::string> thermal_paths = InitThermalPaths();
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int max_temperature = -1;
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for (const auto& path : thermal_paths) {
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std::string content;
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if (!android::base::ReadFileToString(path, &content)) {
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PLOG(WARNING) << "Failed to read " << path;
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continue;
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}
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int temperature;
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if (!android::base::ParseInt(android::base::Trim(content), &temperature)) {
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LOG(WARNING) << "Failed to parse integer in " << content;
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continue;
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}
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max_temperature = std::max(temperature, max_temperature);
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}
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LOG(INFO) << "current maximum temperature: " << max_temperature;
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return max_temperature;
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}
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