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/*
* Copyright (C) 2018 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_TIME_CHECK_H
#define ANDROID_TIME_CHECK_H
#include <utils/KeyedVector.h>
#include <utils/Thread.h>
#include <vector>
namespace android {
// A class monitoring execution time for a code block (scoped variable) and causing an assert
// if it exceeds a certain time
class TimeCheck {
public:
// The default timeout is chosen to be less than system server watchdog timeout
static constexpr uint32_t kDefaultTimeOutMs = 5000;
TimeCheck(const char *tag, uint32_t timeoutMs = kDefaultTimeOutMs);
~TimeCheck();
static void setAudioHalPids(const std::vector<pid_t>& pids);
static std::vector<pid_t> getAudioHalPids();
private:
class TimeCheckThread : public Thread {
public:
TimeCheckThread() {}
virtual ~TimeCheckThread() override;
nsecs_t startMonitoring(const char *tag, uint32_t timeoutMs);
void stopMonitoring(nsecs_t endTimeNs);
private:
// RefBase
virtual void onFirstRef() override { run("TimeCheckThread", PRIORITY_URGENT_AUDIO); }
// Thread
virtual bool threadLoop() override;
Condition mCond;
Mutex mMutex;
// using the end time in ns as key is OK given the risk is low that two entries
// are added in such a way that <add time> + <timeout> are the same for both.
KeyedVector< nsecs_t, const char*> mMonitorRequests;
};
static sp<TimeCheckThread> getTimeCheckThread();
static void accessAudioHalPids(std::vector<pid_t>* pids, bool update);
const nsecs_t mEndTimeNs;
};
}; // namespace android
#endif // ANDROID_TIME_CHECK_H