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76 lines
2.4 KiB
76 lines
2.4 KiB
4 months ago
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/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License 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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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_TIME_CHECK_H
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#define ANDROID_TIME_CHECK_H
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#include <utils/KeyedVector.h>
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#include <utils/Thread.h>
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#include <vector>
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namespace android {
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// A class monitoring execution time for a code block (scoped variable) and causing an assert
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// if it exceeds a certain time
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class TimeCheck {
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public:
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// The default timeout is chosen to be less than system server watchdog timeout
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static constexpr uint32_t kDefaultTimeOutMs = 5000;
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TimeCheck(const char *tag, uint32_t timeoutMs = kDefaultTimeOutMs);
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~TimeCheck();
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static void setAudioHalPids(const std::vector<pid_t>& pids);
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static std::vector<pid_t> getAudioHalPids();
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private:
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class TimeCheckThread : public Thread {
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public:
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TimeCheckThread() {}
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virtual ~TimeCheckThread() override;
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nsecs_t startMonitoring(const char *tag, uint32_t timeoutMs);
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void stopMonitoring(nsecs_t endTimeNs);
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private:
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// RefBase
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virtual void onFirstRef() override { run("TimeCheckThread", PRIORITY_URGENT_AUDIO); }
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// Thread
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virtual bool threadLoop() override;
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Condition mCond;
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Mutex mMutex;
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// using the end time in ns as key is OK given the risk is low that two entries
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// are added in such a way that <add time> + <timeout> are the same for both.
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KeyedVector< nsecs_t, const char*> mMonitorRequests;
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};
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static sp<TimeCheckThread> getTimeCheckThread();
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static void accessAudioHalPids(std::vector<pid_t>* pids, bool update);
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const nsecs_t mEndTimeNs;
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};
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}; // namespace android
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#endif // ANDROID_TIME_CHECK_H
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