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90 lines
3.5 KiB
90 lines
3.5 KiB
4 months ago
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/*
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* Copyright 2020 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 CPP_WATCHDOG_SERVER_TESTS_LOOPERSTUB_H_
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#define CPP_WATCHDOG_SERVER_TESTS_LOOPERSTUB_H_
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#include <android-base/chrono_utils.h>
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#include <android-base/result.h>
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#include <time.h>
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#include <utils/Looper.h>
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#include <utils/Mutex.h>
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#include <utils/StrongPointer.h>
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#include <functional>
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#include <vector>
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#include "LooperWrapper.h"
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namespace android {
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namespace automotive {
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namespace watchdog {
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namespace testing {
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// LooperStub allows polling the underlying looper deterministically.
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// NOTE: Current implementation only works for one handler.
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class LooperStub : public LooperWrapper {
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public:
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LooperStub() : mHandler(nullptr), mShouldPoll(false), mTimer(0) {}
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nsecs_t now() override { return mTimer.count(); }
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// No-op when mShouldPoll is false. Otherwise, sends messages (in a non-empty CacheEntry from
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// the front of |mCache|) to the underlying looper and polls the looper immediately.
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int pollAll(int timeoutMillis) override;
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// Updates the front of |mCache| with the given message so the next pollAll call to the
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// underlying looper will poll this message.
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void sendMessage(const android::sp<MessageHandler>& handler, const Message& message) override;
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// Updates the seconds(uptimeDelay) position in |mCache| with the given message.
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// Thus |uptimeDelay| should be convertible to seconds without any fractions. uptimeDelay is
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// computed from (uptime - now).
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void sendMessageAtTime(nsecs_t uptime, const android::sp<MessageHandler>& handler,
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const Message& message) override;
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// Removes all the messages from the cache and looper for |mHandler|.
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void removeMessages(const android::sp<MessageHandler>& handler) override;
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// Removes the |what| message from the cache and looper for |mHandler|.
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void removeMessages(const android::sp<MessageHandler>& handler, int what) override;
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// Sets |mShouldPoll| so that the subsequent |pollAll| call processes the next non-empty
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// CacheEntry in |mCache|. Before returning, waits for the pollAll call sent to the underlying
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// looper to complete. Thus the caller can be certain this message was processed.
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android::base::Result<void> pollCache();
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// Number of seconds elapsed since the last pollAll call to the underlying looper.
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nsecs_t numSecondsElapsed() {
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return std::chrono::duration_cast<std::chrono::seconds>(mElapsedTime).count();
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}
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private:
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Mutex mMutex;
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android::sp<MessageHandler> mHandler;
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using CacheEntry = std::vector<Message>; // Messages to process on a given second.
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std::vector<CacheEntry> mCache; // Messages pending to be processed.
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bool mShouldPoll;
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std::chrono::nanoseconds mTimer;
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std::chrono::nanoseconds mElapsedTime;
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};
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} // namespace testing
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} // namespace watchdog
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} // namespace automotive
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} // namespace android
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#endif // CPP_WATCHDOG_SERVER_TESTS_LOOPERSTUB_H_
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