1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef ThermalManager_DEFINED 9 #define ThermalManager_DEFINED 10 11 #include "../private/SkTArray.h" 12 #include "SkString.h" 13 14 #if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX) 15 # define THERMAL_MANAGER_SUPPORTED 16 #endif 17 18 #ifdef THERMAL_MANAGER_SUPPORTED 19 20 /* 21 * This simple class monitors the thermal part of sysfs to ensure we don't trigger thermal events 22 */ 23 24 class ThermalManager { 25 public: 26 ThermalManager(int32_t threshold, uint32_t sleepIntervalMs, uint32_t timeoutMs); 27 28 bool coolOffIfNecessary(); 29 30 private: 31 static int32_t OpenFileAndReadInt32(const char* path); 32 33 // current temperature can be read from /thermalZonePath/temp 34 static int32_t GetTemp(SkString thermalZonePath) { 35 SkString temperatureFilePath(thermalZonePath); 36 temperatureFilePath.appendf("/temp"); 37 return OpenFileAndReadInt32(temperatureFilePath.c_str()); 38 } 39 40 struct TripPoint { 41 TripPoint(SkString thermalZoneRoot, SkString pointName, int32_t threshold); 42 43 bool willTrip(); 44 45 SkString fThermalZoneRoot; 46 SkString fPointName; 47 int32_t fBase; 48 int32_t fPoint; 49 int32_t fThreshold; 50 51 // Certain trip points seem to start tripped. For example, I have seen trip points of 0 or 52 // negative numbers. 53 bool fDisabled; 54 }; 55 56 SkTArray<TripPoint> fTripPoints; 57 uint32_t fSleepIntervalMs; 58 uint32_t fTimeoutMs; 59 }; 60 #endif 61 #endif 62
