| // Copyright 2020 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef PLATFORM_PUBLIC_CANCELABLE_ALARM_H_ |
| #define PLATFORM_PUBLIC_CANCELABLE_ALARM_H_ |
| |
| #include <cstdint> |
| #include <functional> |
| #include <memory> |
| #include <string> |
| |
| #include "internal/platform/cancelable.h" |
| #include "internal/platform/mutex.h" |
| #include "internal/platform/mutex_lock.h" |
| #include "internal/platform/scheduled_executor.h" |
| |
| namespace location { |
| namespace nearby { |
| |
| /** |
| * A cancelable alarm with a name. This is a simple wrapper around the logic |
| * for posting a Runnable on a ScheduledExecutor and (possibly) later |
| * canceling it. |
| */ |
| class CancelableAlarm { |
| public: |
| CancelableAlarm() = default; |
| CancelableAlarm(absl::string_view name, std::function<void()>&& runnable, |
| absl::Duration delay, ScheduledExecutor* scheduled_executor) |
| : name_(name), |
| cancelable_(scheduled_executor->Schedule(std::move(runnable), delay)) {} |
| ~CancelableAlarm() = default; |
| CancelableAlarm(CancelableAlarm&& other) { *this = std::move(other); } |
| CancelableAlarm& operator=(CancelableAlarm&& other) { |
| MutexLock lock(&mutex_); |
| { |
| MutexLock other_lock(&other.mutex_); |
| name_ = std::move(other.name_); |
| cancelable_ = std::move(other.cancelable_); |
| } |
| return *this; |
| } |
| |
| bool Cancel() { |
| MutexLock lock(&mutex_); |
| return cancelable_.Cancel(); |
| } |
| |
| bool IsValid() { return cancelable_.IsValid(); } |
| |
| private: |
| Mutex mutex_; |
| std::string name_; |
| Cancelable cancelable_; |
| }; |
| |
| } // namespace nearby |
| } // namespace location |
| |
| #endif // PLATFORM_PUBLIC_CANCELABLE_ALARM_H_ |