| // 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_SCHEDULED_EXECUTOR_H_ |
| #define PLATFORM_PUBLIC_SCHEDULED_EXECUTOR_H_ |
| |
| #include <cstdint> |
| #include <functional> |
| #include <memory> |
| |
| #include "absl/base/thread_annotations.h" |
| #include "absl/time/time.h" |
| #include "internal/platform/implementation/platform.h" |
| #include "internal/platform/implementation/scheduled_executor.h" |
| #include "internal/platform/runnable.h" |
| #include "internal/platform/cancelable.h" |
| #include "internal/platform/cancellable_task.h" |
| #include "internal/platform/lockable.h" |
| #include "internal/platform/monitored_runnable.h" |
| #include "internal/platform/mutex.h" |
| #include "internal/platform/mutex_lock.h" |
| #include "internal/platform/thread_check_callable.h" |
| #include "internal/platform/thread_check_runnable.h" |
| |
| namespace location { |
| namespace nearby { |
| |
| // An Executor that can schedule commands to run after a given delay, or to |
| // execute periodically. |
| // |
| // https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ScheduledExecutorService.html |
| class ABSL_LOCKABLE ScheduledExecutor final : public Lockable { |
| public: |
| using Platform = api::ImplementationPlatform; |
| |
| ScheduledExecutor() : impl_(Platform::CreateScheduledExecutor()) {} |
| ScheduledExecutor(ScheduledExecutor&& other) { *this = std::move(other); } |
| ~ScheduledExecutor() { |
| MutexLock lock(&mutex_); |
| DoShutdown(); |
| } |
| |
| ScheduledExecutor& operator=(ScheduledExecutor&& other) |
| ABSL_LOCKS_EXCLUDED(mutex_) { |
| MutexLock lock(&mutex_); |
| { |
| MutexLock other_lock(&other.mutex_); |
| impl_ = std::move(other.impl_); |
| } |
| return *this; |
| } |
| void Execute(const std::string& name, Runnable&& runnable) |
| ABSL_LOCKS_EXCLUDED(mutex_) { |
| MutexLock lock(&mutex_); |
| if (impl_) |
| impl_->Execute(MonitoredRunnable( |
| name, ThreadCheckRunnable(this, std::move(runnable)))); |
| } |
| |
| void Execute(Runnable&& runnable) ABSL_LOCKS_EXCLUDED(mutex_) { |
| MutexLock lock(&mutex_); |
| if (impl_) impl_->Execute(ThreadCheckRunnable(this, std::move(runnable))); |
| } |
| |
| void Shutdown() ABSL_LOCKS_EXCLUDED(mutex_) { |
| MutexLock lock(&mutex_); |
| DoShutdown(); |
| } |
| |
| Cancelable Schedule(Runnable&& runnable, absl::Duration duration) |
| ABSL_LOCKS_EXCLUDED(mutex_) { |
| MutexLock lock(&mutex_); |
| if (impl_) { |
| auto task = std::make_shared<CancellableTask>( |
| ThreadCheckRunnable(this, std::move(runnable))); |
| return Cancelable(task, |
| impl_->Schedule([task]() { (*task)(); }, duration)); |
| } else { |
| return Cancelable(); |
| } |
| } |
| |
| private: |
| void DoShutdown() ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex_) { |
| if (impl_) { |
| impl_->Shutdown(); |
| impl_.reset(); |
| } |
| } |
| |
| mutable Mutex mutex_; |
| std::unique_ptr<api::ScheduledExecutor> ABSL_GUARDED_BY(mutex_) impl_; |
| }; |
| |
| } // namespace nearby |
| } // namespace location |
| |
| #endif // PLATFORM_PUBLIC_SCHEDULED_EXECUTOR_H_ |