mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
// Copyright 2020-2023 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_IMPL_WINDOWS_THREAD_POOL_H_
|
|
#define PLATFORM_IMPL_WINDOWS_THREAD_POOL_H_
|
|
|
|
#include <windows.h>
|
|
|
|
#include <memory>
|
|
#include <queue>
|
|
#include <utility>
|
|
|
|
#include "absl/base/thread_annotations.h"
|
|
#include "absl/synchronization/mutex.h"
|
|
#include "internal/platform/count_down_latch.h"
|
|
#include "internal/platform/runnable.h"
|
|
|
|
namespace nearby {
|
|
namespace windows {
|
|
|
|
class ThreadPool {
|
|
public:
|
|
virtual ~ThreadPool();
|
|
static std::unique_ptr<ThreadPool> Create(int max_pool_size);
|
|
|
|
// Runs a task on thread pool. The result indicates whether the task is put
|
|
// into the thread pool.
|
|
bool Run(Runnable task) ABSL_LOCKS_EXCLUDED(mutex_);
|
|
|
|
// In Nearby platform, thread pool should make sure all queued tasks completed
|
|
// in shut down.
|
|
void ShutDown();
|
|
|
|
private:
|
|
ThreadPool(PTP_POOL thread_pool, TP_CALLBACK_ENVIRON thread_pool_environ,
|
|
int max_pool_size);
|
|
void RunNextTask();
|
|
|
|
// Protects the access to tasks of the thread pool.
|
|
mutable absl::Mutex mutex_;
|
|
|
|
// The task queue of the thread pool. Thread pool will pick up task to run
|
|
// when it is idle.
|
|
std::queue<Runnable> tasks_ ABSL_GUARDED_BY(mutex_);
|
|
|
|
// Keeps the pointer of the thread pool. It is created when constructing the
|
|
// thread pool.
|
|
PTP_POOL thread_pool_ ABSL_GUARDED_BY(mutex_) = nullptr;
|
|
|
|
// Keeps the environment of the thread pool.
|
|
TP_CALLBACK_ENVIRON thread_pool_environ_ ABSL_GUARDED_BY(mutex_);
|
|
|
|
// The maximum thread count in the thread pool
|
|
int max_pool_size_ ABSL_GUARDED_BY(mutex_) = 0;
|
|
|
|
// Current running task count
|
|
int running_tasks_count_ ABSL_GUARDED_BY(mutex_) = 0;
|
|
|
|
// The latch is used to wait for running tasks
|
|
std::unique_ptr<CountDownLatch> shutdown_latch_ = nullptr;
|
|
|
|
friend VOID CALLBACK WorkCallback(PTP_CALLBACK_INSTANCE instance,
|
|
PVOID parameter, PTP_WORK work);
|
|
};
|
|
|
|
} // namespace windows
|
|
} // namespace nearby
|
|
|
|
#endif // PLATFORM_IMPL_WINDOWS_THREAD_POOL_H_
|