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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_SENSORS_VTS_ENVIRONMENT_BASE_H
#define ANDROID_SENSORS_VTS_ENVIRONMENT_BASE_H
#include <gtest/gtest.h>
#include <atomic>
#include <memory>
#include <mutex>
#include <thread>
#include <vector>
#include <log/log.h>
template <class Event>
class IEventCallback {
public:
virtual ~IEventCallback() = default;
virtual void onEvent(const Event& event) = 0;
};
template <class Event>
class SensorsVtsEnvironmentBase {
public:
virtual void SetUp() {
ASSERT_TRUE(resetHal()) << "could not get hidl service";
mCollectionEnabled = false;
startPollingThread();
// In case framework just stopped for test and there is sensor events in the pipe,
// wait some time for those events to be cleared to avoid them messing up the test.
std::this_thread::sleep_for(std::chrono::seconds(3));
}
virtual void TearDown() = 0;
// Get and clear all events collected so far (like "cat" shell command).
// If output is nullptr, it clears all collected events.
void catEvents(std::vector<Event>* output) {
std::lock_guard<std::mutex> lock(mEventsMutex);
if (output) {
output->insert(output->end(), mEvents.begin(), mEvents.end());
}
mEvents.clear();
}
// set sensor event collection status
void setCollection(bool enable) {
std::lock_guard<std::mutex> lock(mEventsMutex);
mCollectionEnabled = enable;
}
void registerCallback(IEventCallback<Event>* callback) {
std::lock_guard<std::mutex> lock(mEventsMutex);
mCallback = callback;
}
void unregisterCallback() {
std::lock_guard<std::mutex> lock(mEventsMutex);
mCallback = nullptr;
}
std::vector<Event> collectEvents(useconds_t timeLimitUs, size_t nEventLimit,
bool clearBeforeStart = true, bool changeCollection = true) {
std::vector<Event> events;
constexpr useconds_t SLEEP_GRANULARITY = 100 * 1000; // granularity 100 ms
ALOGI("collect max of %zu events for %d us, clearBeforeStart %d", nEventLimit, timeLimitUs,
clearBeforeStart);
if (changeCollection) {
setCollection(true);
}
if (clearBeforeStart) {
catEvents(nullptr);
}
while (timeLimitUs > 0) {
useconds_t duration = std::min(SLEEP_GRANULARITY, timeLimitUs);
usleep(duration);
timeLimitUs -= duration;
catEvents(&events);
if (events.size() >= nEventLimit) {
break;
}
ALOGV("time to go = %d, events to go = %d", (int)timeLimitUs,
(int)(nEventLimit - events.size()));
}
if (changeCollection) {
setCollection(false);
}
return events;
}
protected:
SensorsVtsEnvironmentBase(const std::string& service_name)
: mCollectionEnabled(false), mCallback(nullptr) {
mServiceName = service_name;
}
virtual ~SensorsVtsEnvironmentBase(){};
void addEvent(const Event& ev) {
std::lock_guard<std::mutex> lock(mEventsMutex);
if (mCollectionEnabled) {
mEvents.push_back(ev);
}
if (mCallback != nullptr) {
mCallback->onEvent(ev);
}
}
virtual void startPollingThread() = 0;
virtual bool resetHal() = 0;
std::string mServiceName;
bool mCollectionEnabled;
std::atomic_bool mStopThread;
std::thread mPollThread;
std::vector<Event> mEvents;
std::mutex mEventsMutex;
IEventCallback<Event>* mCallback;
GTEST_DISALLOW_COPY_AND_ASSIGN_(SensorsVtsEnvironmentBase<Event>);
};
#endif // ANDROID_SENSORS_VTS_ENVIRONMENT_BASE_H
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