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77 lines
2.1 KiB
77 lines
2.1 KiB
/*
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* Copyright (C) 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 FRAMEWORK_NATIVE_CMD_TASKQUEUE_H_
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#define FRAMEWORK_NATIVE_CMD_TASKQUEUE_H_
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#include <mutex>
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#include <queue>
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#include <android-base/macros.h>
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namespace android {
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namespace os {
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namespace dumpstate {
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/*
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* A task queue for dumpstate to collect tasks such as adding file to the zip
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* which are needed to run in a single thread. The task is a callable function
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* included a cancel task boolean parameter. The TaskQueue could
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* cancel the task in the destructor if the task has never been called.
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*/
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class TaskQueue {
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public:
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TaskQueue() = default;
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~TaskQueue();
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/*
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* Adds a task into the queue.
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*
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* |f| Callable function to execute the task. The function must include a
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* boolean parameter for TaskQueue to notify whether the task is
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* cancelled or not.
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* |args| A list of arguments.
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*/
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template<class F, class... Args> void add(F&& f, Args&&... args) {
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auto func = std::bind(std::forward<F>(f), std::forward<Args>(args)...);
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std::unique_lock lock(lock_);
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tasks_.emplace([=](bool cancelled) {
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std::invoke(func, cancelled);
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});
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}
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/*
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* Invokes all tasks in the task queue.
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*
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* |do_cancel| true to cancel all tasks in the queue.
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*/
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void run(bool do_cancel);
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private:
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using Task = std::function<void(bool)>;
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std::mutex lock_;
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std::queue<Task> tasks_;
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DISALLOW_COPY_AND_ASSIGN(TaskQueue);
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};
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} // namespace dumpstate
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} // namespace os
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} // namespace android
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#endif //FRAMEWORK_NATIVE_CMD_TASKQUEUE_H_
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