65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/*
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* Copyright (C) 2022 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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#include "SimpleThread.h"
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namespace android {
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namespace hardware {
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namespace camera {
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namespace common {
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namespace helper {
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SimpleThread::SimpleThread() : mDone(true), mThread() {}
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SimpleThread::~SimpleThread() {
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// Safe to call requestExitAndWait() from the destructor because requestExitAndWait() ensures
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// that the thread is joinable before joining on it. This is different from how
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// android::Thread worked.
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requestExitAndWait();
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}
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void SimpleThread::run() {
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requestExitAndWait(); // Exit current execution, if any.
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// start thread
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mDone.store(false, std::memory_order_release);
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mThread = std::thread(&SimpleThread::runLoop, this);
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}
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void SimpleThread::requestExitAndWait() {
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// Signal thread to stop
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mDone.store(true, std::memory_order_release);
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// Wait for thread to exit if needed. This should happen in no more than one iteration of
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// threadLoop
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if (mThread.joinable()) {
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mThread.join();
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}
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mThread = std::thread();
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}
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void SimpleThread::runLoop() {
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while (!exitPending()) {
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if (!threadLoop()) {
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break;
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}
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}
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}
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} // namespace helper
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} // namespace common
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} // namespace camera
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} // namespace hardware
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} // namespace android
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