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/*
* Copyright (C) 2007 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.
*/
#ifndef ANDROID_CPUGAUGE_H
#define ANDROID_CPUGAUGE_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/types.h>
#include <utils/Timers.h>
#include <ui/SurfaceComposerClient.h>
namespace android {
class CPUGauge : public Thread
{
public:
CPUGauge( const sp<ISurfaceComposer>& composer,
nsecs_t interval=s2ns(1),
int clock=SYSTEM_TIME_THREAD,
int refclock=SYSTEM_TIME_MONOTONIC);
~CPUGauge();
const sp<SurfaceComposerClient>& session() const;
void sample();
inline float cpuUsage() const { return mCpuUsage; }
inline float idle() const { return mIdleTime; }
private:
virtual void onFirstRef();
virtual status_t readyToRun();
virtual bool threadLoop();
Mutex mLock;
sp<SurfaceComposerClient> mSession;
const nsecs_t mInterval;
const int mClock;
const int mRefClock;
nsecs_t mReferenceTime;
nsecs_t mReferenceWorkingTime;
float mCpuUsage;
nsecs_t mRefIdleTime;
float mIdleTime;
FILE* mFd;
};
}; // namespace android
#endif // ANDROID_CPUGAUGE_H
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