mirror of
https://github.com/Evolution-X/hardware_interfaces
synced 2026-02-01 21:37:44 +00:00
0d2d8a4b4d
This CL moves the common helper classes from inside the HIDL directory and refactors the HIDL-esque namespaces to android style namespaces. To preserve compatibility, the header files export the new symbols under old namespace and the old build module exports symbols from the new build module. This refactor is transparent to the codebase. Also ran clangformat to appease the repohook gods. Bug: 219974678 Test: Existing VTS tests pass on Cuttlefish Change-Id: I8c3160497c1e2fe7a0a7155641f0e1f5e47ec32e
65 lines
2.0 KiB
C++
65 lines
2.0 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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#ifndef HARDWARE_INTERFACES_CAMERA_COMMON_SIMPLETHREAD_H_
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#define HARDWARE_INTERFACES_CAMERA_COMMON_SIMPLETHREAD_H_
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#include <thread>
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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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// A simple looper based on std::thread.
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class SimpleThread {
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public:
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SimpleThread();
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virtual ~SimpleThread();
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// Explicit call to start execution of the thread. No thread is created before this function
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// is called.
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virtual void run() final;
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virtual void requestExitAndWait() final;
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protected:
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// Main logic of the thread. This function is called repeatedly until it returns false.
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// Thread execution stops if this function returns false.
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virtual bool threadLoop() = 0;
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// Returns true if the thread execution should stop. Should be used by threadLoop to check if
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// the thread has been requested to exit.
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virtual inline bool exitPending() final { return mDone.load(std::memory_order_acquire); }
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private:
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// Wraps threadLoop in a simple while loop that allows safe exit
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virtual void runLoop() final;
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// Flag to signal end of thread execution. This flag is checked before every iteration
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// of threadLoop.
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std::atomic_bool mDone;
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std::thread mThread;
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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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#endif // HARDWARE_INTERFACES_CAMERA_COMMON_SIMPLETHREAD_H_
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