mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
// 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 "platform/api/platform.h"
|
|
#include "platform/api/scheduled_executor.h"
|
|
#include "platform/base/runnable.h"
|
|
#include "platform/public/cancelable.h"
|
|
#include "platform/public/cancellable_task.h"
|
|
#include "platform/public/mutex.h"
|
|
#include "platform/public/mutex_lock.h"
|
|
#include "absl/time/time.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 ScheduledExecutor final {
|
|
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(Runnable&& runnable) ABSL_LOCKS_EXCLUDED(mutex_) {
|
|
MutexLock lock(&mutex_);
|
|
if (impl_) impl_->Execute(std::move(runnable));
|
|
}
|
|
|
|
void Shutdown() ABSL_LOCKS_EXCLUDED(mutex_) {
|
|
MutexLock lock(&mutex_);
|
|
DoShutdown();
|
|
}
|
|
|
|
int GetTid(int index) const {
|
|
MutexLock lock(&mutex_);
|
|
return impl_->GetTid(index);
|
|
}
|
|
int Tid() const { return GetTid(0); }
|
|
|
|
Cancelable Schedule(Runnable&& runnable, absl::Duration duration)
|
|
ABSL_LOCKS_EXCLUDED(mutex_) {
|
|
MutexLock lock(&mutex_);
|
|
if (impl_) {
|
|
auto task = std::make_shared<CancellableTask>(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_
|