62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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/*
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* Copyright 2016 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef ThermalManager_DEFINED
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#define ThermalManager_DEFINED
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#include "SkString.h"
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#include "SkTArray.h"
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#if defined(SK_BUILD_FOR_ANDROID) || defined(SK_BUILD_FOR_UNIX)
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# define THERMAL_MANAGER_SUPPORTED
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#endif
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#ifdef THERMAL_MANAGER_SUPPORTED
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/*
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* This simple class monitors the thermal part of sysfs to ensure we don't trigger thermal events
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*/
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class ThermalManager {
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public:
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ThermalManager(int32_t threshold, uint32_t sleepIntervalMs, uint32_t timeoutMs);
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bool coolOffIfNecessary();
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private:
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static int32_t OpenFileAndReadInt32(const char* path);
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// current temperature can be read from /thermalZonePath/temp
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static int32_t GetTemp(SkString thermalZonePath) {
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SkString temperatureFilePath(thermalZonePath);
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temperatureFilePath.appendf("/temp");
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return OpenFileAndReadInt32(temperatureFilePath.c_str());
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}
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struct TripPoint {
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TripPoint(SkString thermalZoneRoot, SkString pointName, int32_t threshold);
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bool willTrip();
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SkString fThermalZoneRoot;
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SkString fPointName;
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int32_t fBase;
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int32_t fPoint;
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int32_t fThreshold;
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// Certain trip points seem to start tripped. For example, I have seen trip points of 0 or
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// negative numbers.
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bool fDisabled;
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};
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SkTArray<TripPoint> fTripPoints;
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uint32_t fSleepIntervalMs;
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uint32_t fTimeoutMs;
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};
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#endif
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#endif
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