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59 lines
1.6 KiB
59 lines
1.6 KiB
/* |
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* Copyright 2019 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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#pragma once |
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#include <functional> |
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#include <memory> |
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#include <mutex> |
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#include "os/thread.h" |
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#include "os/utils.h" |
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namespace bluetooth { |
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namespace os { |
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// A single-shot alarm for reactor-based thread, implemented by Linux timerfd. |
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// When it's constructed, it will register a reactable on the specified thread; when it's destroyed, it will unregister |
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// itself from the thread. |
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class Alarm { |
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public: |
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// Create and register a single-shot alarm on given thread |
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explicit Alarm(Thread* thread); |
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// Unregister this alarm from the thread and release resource |
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~Alarm(); |
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DISALLOW_COPY_AND_ASSIGN(Alarm); |
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// Schedule the alarm with given delay |
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void Schedule(Closure task, std::chrono::milliseconds delay); |
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// Cancel the alarm. No-op if it's not armed. |
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void Cancel(); |
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private: |
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Closure task_; |
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Thread* thread_; |
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int fd_ = 0; |
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Reactor::Reactable* token_; |
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mutable std::mutex mutex_; |
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void on_fire(); |
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}; |
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} // namespace os |
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} // namespace bluetooth
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