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author | Tao Bao <tbao@google.com> | 2019-10-02 23:24:27 +0200 |
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committer | android-build-merger <android-build-merger@google.com> | 2019-10-02 23:24:27 +0200 |
commit | dc717a5c2bc1ac096848d4624ad5f3f73f4849cb (patch) | |
tree | da34c5f388501e89174ccaaee83e9c36ede83e23 /recovery_utils/thermalutil.cpp | |
parent | Merge "otautil: Drop a few unneeded includes." (diff) | |
parent | Merge "otautil: Factor out the utils that're private to recovery." (diff) | |
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Diffstat (limited to 'recovery_utils/thermalutil.cpp')
-rw-r--r-- | recovery_utils/thermalutil.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/recovery_utils/thermalutil.cpp b/recovery_utils/thermalutil.cpp new file mode 100644 index 000000000..5436355d6 --- /dev/null +++ b/recovery_utils/thermalutil.cpp @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2017 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "recovery_utils/thermalutil.h" + +#include <dirent.h> +#include <stdio.h> + +#include <algorithm> +#include <string> +#include <vector> + +#include <android-base/file.h> +#include <android-base/logging.h> +#include <android-base/parseint.h> +#include <android-base/strings.h> + +static constexpr auto THERMAL_PREFIX = "/sys/class/thermal/"; + +static int thermal_filter(const dirent* de) { + if (android::base::StartsWith(de->d_name, "thermal_zone")) { + return 1; + } + return 0; +} + +static std::vector<std::string> InitThermalPaths() { + dirent** namelist; + int n = scandir(THERMAL_PREFIX, &namelist, thermal_filter, alphasort); + if (n == -1) { + PLOG(ERROR) << "Failed to scandir " << THERMAL_PREFIX; + return {}; + } + if (n == 0) { + LOG(ERROR) << "Failed to find CPU thermal info in " << THERMAL_PREFIX; + return {}; + } + + std::vector<std::string> thermal_paths; + while (n--) { + thermal_paths.push_back(THERMAL_PREFIX + std::string(namelist[n]->d_name) + "/temp"); + free(namelist[n]); + } + free(namelist); + return thermal_paths; +} + +int GetMaxValueFromThermalZone() { + static std::vector<std::string> thermal_paths = InitThermalPaths(); + int max_temperature = -1; + for (const auto& path : thermal_paths) { + std::string content; + if (!android::base::ReadFileToString(path, &content)) { + PLOG(WARNING) << "Failed to read " << path; + continue; + } + + int temperature; + if (!android::base::ParseInt(android::base::Trim(content), &temperature)) { + LOG(WARNING) << "Failed to parse integer in " << content; + continue; + } + max_temperature = std::max(temperature, max_temperature); + } + LOG(INFO) << "current maximum temperature: " << max_temperature; + return max_temperature; +} |