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67 lines
1.7 KiB
67 lines
1.7 KiB
4 months ago
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/**
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* Copyright (C) 2021 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_CARSERVICE_EVSCALLBACKTHREAD_H
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#define ANDROID_CARSERVICE_EVSCALLBACKTHREAD_H
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#include <android-base/macros.h>
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#include <android-base/thread_annotations.h>
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#include <jni.h>
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#include <queue>
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#include <thread>
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namespace android {
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namespace automotive {
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namespace evs {
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/*
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* This class defines the thread that handles callbacks from the native Extended
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* View System service.
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*/
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class EvsCallbackThread {
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using Task = std::function<void(JNIEnv*)>;
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JavaVM* mVm;
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std::atomic<bool> mRunning;
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std::thread mThread;
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std::mutex mLock;
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std::condition_variable mCondition;
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std::queue<Task> mTaskQueue GUARDED_BY(mLock);
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// Main loop to handle enqueued tasks continuously
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void threadLoop();
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DISALLOW_COPY_AND_ASSIGN(EvsCallbackThread);
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public:
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explicit EvsCallbackThread(JavaVM* vm);
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virtual ~EvsCallbackThread();
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// Adds a new task to the queue
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void enqueue(const Task& task) ACQUIRE(mLock);
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// Stops a task handler thread
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void stop();
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};
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} // namespace evs
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} // namespace automotive
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} // namespace android
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#endif // ANDROID_CARSERVICE_EVSCALLBACKTHREAD_H
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