| // Copyright 2015 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "thermald/cooling_device.h" |
| |
| #include <string> |
| |
| #include "base/files/file_util.h" |
| #include "base/logging.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_util.h" |
| |
| using std::string; |
| |
| namespace thermald { |
| |
| CoolingDevice::CoolingDevice(int id) |
| : id_(id), |
| cur_state_attr_( |
| base::StringPrintf("/sys/class/thermal/cooling_device%d/cur_state", |
| id)) { |
| } |
| |
| bool CoolingDevice::SetThrottleState(int state) { |
| string str_state(base::NumberToString(state)); |
| if (WriteFile(cur_state_attr_, str_state.c_str(), str_state.length()) != |
| static_cast<int>(str_state.length())) { |
| LOG(ERROR) << "[" << id_ << "] Failed to write '" |
| << cur_state_attr_.value() << "'"; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool CoolingDevice::GetThrottleState(int *state) const { |
| string contents; |
| if (!base::ReadFileToString(cur_state_attr_, &contents)) { |
| LOG(ERROR) << "[" << id_ << "] Failed to read '" |
| << cur_state_attr_.value() << "'"; |
| return false; |
| } |
| |
| base::TrimWhitespaceASCII(contents, base::TRIM_TRAILING, &contents); |
| return base::StringToInt(contents, state); |
| } |
| |
| } // namespace thermald |