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125 lines
4.5 KiB
C++
125 lines
4.5 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file 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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*
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*/
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#if !defined(AZ_RELEASE_BUILD)
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#include "ThermalInfoAndroid.h"
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#include <AzCore/std/string/string.h>
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#include <AzFramework/StringFunc/StringFunc.h>
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#include <cstdio>
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#include <sys/types.h>
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#include <dirent.h>
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ThermalInfoAndroidHandler::ThermalInfoAndroidHandler()
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{
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static_assert(AZ_ARRAY_SIZE(m_temperatureFiles) == static_cast<int>(ThermalSensorType::Count), "Thermal count does not match temperature array size");
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ThermalInfoRequestsBus::Handler::BusConnect();
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memset(m_temperatureFiles, 0, sizeof(m_temperatureFiles));
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const int sensorCount = static_cast<int>(ThermalSensorType::Count);
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const char* sensorTypes[sensorCount] = { "cpu", "gpu", "battery" };
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const int maxStringLen = 128;
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char tempString[maxStringLen];
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const char* thermalPath = "/sys/class/thermal";
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// List the elements from the thermal folder to get the thermal_zones available on the device
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DIR* directory = opendir(thermalPath);
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if (directory)
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{
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struct dirent* item;
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const char* thermalPrefix = "thermal_zone";
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// List all items of the directory and find the one that start with thermal_zone (thermal_zone0, thermal_zone1, etc)
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while ((item = readdir(directory)) != nullptr)
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{
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if (strncmp(item->d_name, thermalPrefix, strlen(thermalPrefix)) == 0)
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{
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// Try to deduce the type of sensor. For this we read the "type" file of the thermal zone.
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// This "type" is a string set by the manufacturer, so it can be anything.
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AZStd::string path = AZStd::string::format("%s/%s/type", thermalPath, item->d_name);
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FILE* sensorTypeFile = fopen(path.c_str(), "r");
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if (sensorTypeFile)
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{
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if (fscanf(sensorTypeFile, "%s", tempString))
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{
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for (int i = 0; i < sensorCount; ++i)
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{
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if (m_temperatureFiles[i])
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{
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continue;
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}
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size_t foundPos = AzFramework::StringFunc::Find(tempString, sensorTypes[i]);
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if (foundPos != AZStd::string::npos)
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{
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path = AZStd::string::format("%s/%s/temp", thermalPath, item->d_name);
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m_temperatureFiles[i] = fopen(path.c_str(), "r");
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break;
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}
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}
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}
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fclose(sensorTypeFile);
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}
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}
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}
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closedir(directory);
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}
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int cpuSensorIndex = static_cast<int>(ThermalSensorType::CPU);
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if (!m_temperatureFiles[cpuSensorIndex])
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{
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// If we didn't find the CPU sensor just assume it's the first one.
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AZStd::string path = AZStd::string::format("%s/thermal_zone0/temp", thermalPath);
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m_temperatureFiles[cpuSensorIndex] = fopen(path.c_str(), "r");
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}
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}
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ThermalInfoAndroidHandler::~ThermalInfoAndroidHandler()
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{
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ThermalInfoRequestsBus::Handler::BusDisconnect();
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for (int i = 0; i < static_cast<int>(ThermalSensorType::Count); ++i)
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{
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if (m_temperatureFiles[i])
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{
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fclose(m_temperatureFiles[i]);
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}
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}
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}
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float ThermalInfoAndroidHandler::GetSensorTemp(ThermalSensorType sensor)
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{
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FILE* tempFile = m_temperatureFiles[static_cast<int>(sensor)];
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if (!tempFile)
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{
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return 0.f;
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}
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fseek(tempFile, 0, SEEK_SET);
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float temperature = 0.f;
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fscanf(tempFile, "%f", &temperature);
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temperature /= 1000.0f;
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return temperature;
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}
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float ThermalInfoAndroidHandler::GetSensorOverheatingTemp(ThermalSensorType sensor)
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{
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const int overheatingTemperatures[static_cast<int>(ThermalSensorType::Count)] =
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{
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70, // CPU
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70, // GPU
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40 // Battery
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};
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return overheatingTemperatures[static_cast<int>(sensor)];
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}
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#endif // !defined(AZ_RELEASE_BUILD)
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