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65 lines
1.8 KiB
65 lines
1.8 KiB
/* |
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* Copyright (C) 2016 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_HIDL_TASK_RUNNER_H |
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#define ANDROID_HIDL_TASK_RUNNER_H |
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#include "SynchronizedQueue.h" |
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#include <memory> |
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#include <thread> |
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namespace android { |
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namespace hardware { |
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namespace details { |
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/* |
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* A background infinite loop that runs the Tasks push()'ed. |
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* Equivalent to a simple single-threaded Looper. |
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*/ |
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class TaskRunner { |
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public: |
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using Task = std::function<void(void)>; |
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/* Create an empty task runner. Nothing will be done until start() is called. */ |
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TaskRunner(); |
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/* |
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* Notify the background thread to terminate and return immediately. |
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* Tasks in the queue will continue to be done sequentially in background |
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* until all tasks are finished. |
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*/ |
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~TaskRunner(); |
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/* |
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* Sets the queue limit. Fails the push operation once the limit is reached. |
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* Then kicks off the loop. |
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*/ |
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void start(size_t limit); |
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/* |
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* Add a task. Return true if successful, false if |
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* the queue's size exceeds limit or t doesn't contain a callable target. |
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*/ |
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bool push(const Task &t); |
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private: |
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std::shared_ptr<SynchronizedQueue<Task>> mQueue; |
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}; |
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} // namespace details |
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} // namespace hardware |
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} // namespace android |
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#endif // ANDROID_HIDL_TASK_RUNNER_H
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