Merge "Inline os/linux_generic/queue.tpp into os/queue.h" into main

/*

 * Copyright 2019 The Android Open Source Project

 *

 * 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

 *

 *      http://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.

 */

template <typename T>

Queue<T>::Queue(size_t capacity) : enqueue_(capacity), dequeue_(0){};

template <typename T>

Queue<T>::~Queue() {

  ASSERT_LOG(enqueue_.handler_ == nullptr, "Enqueue is not unregistered");

  ASSERT_LOG(dequeue_.handler_ == nullptr, "Dequeue is not unregistered");

};

template <typename T>

void Queue<T>::RegisterEnqueue(Handler* handler, EnqueueCallback callback) {

  std::lock_guard<std::mutex> lock(mutex_);

  ASSERT(enqueue_.handler_ == nullptr);

  ASSERT(enqueue_.reactable_ == nullptr);

  enqueue_.handler_ = handler;

  enqueue_.reactable_ = enqueue_.handler_->thread_->GetReactor()->Register(

      enqueue_.reactive_semaphore_.GetFd(),

      base::Bind(&Queue<T>::EnqueueCallbackInternal, base::Unretained(this), std::move(callback)),

      base::Closure());

}

template <typename T>

void Queue<T>::UnregisterEnqueue() {

  Reactor* reactor = nullptr;

  Reactor::Reactable* to_unregister = nullptr;

  bool wait_for_unregister = false;

  {

    std::lock_guard<std::mutex> lock(mutex_);

    ASSERT(enqueue_.reactable_ != nullptr);

    reactor = enqueue_.handler_->thread_->GetReactor();

    wait_for_unregister = (!enqueue_.handler_->thread_->IsSameThread());

    to_unregister = enqueue_.reactable_;

    enqueue_.reactable_ = nullptr;

    enqueue_.handler_ = nullptr;

  }

  reactor->Unregister(to_unregister);

  if (wait_for_unregister) {

    reactor->WaitForUnregisteredReactable(std::chrono::milliseconds(1000));

  }

}

template <typename T>

void Queue<T>::RegisterDequeue(Handler* handler, DequeueCallback callback) {

  std::lock_guard<std::mutex> lock(mutex_);

  ASSERT(dequeue_.handler_ == nullptr);

  ASSERT(dequeue_.reactable_ == nullptr);

  dequeue_.handler_ = handler;

  dequeue_.reactable_ = dequeue_.handler_->thread_->GetReactor()->Register(

      dequeue_.reactive_semaphore_.GetFd(), callback, base::Closure());

}

template <typename T>

void Queue<T>::UnregisterDequeue() {

  Reactor* reactor = nullptr;

  Reactor::Reactable* to_unregister = nullptr;

  bool wait_for_unregister = false;

  {

    std::lock_guard<std::mutex> lock(mutex_);

    ASSERT(dequeue_.reactable_ != nullptr);

    reactor = dequeue_.handler_->thread_->GetReactor();

    wait_for_unregister = (!dequeue_.handler_->thread_->IsSameThread());

    to_unregister = dequeue_.reactable_;

    dequeue_.reactable_ = nullptr;

    dequeue_.handler_ = nullptr;

  }

  reactor->Unregister(to_unregister);

  if (wait_for_unregister) {

    reactor->WaitForUnregisteredReactable(std::chrono::milliseconds(1000));

  }

}

template <typename T>

std::unique_ptr<T> Queue<T>::TryDequeue() {

  std::lock_guard<std::mutex> lock(mutex_);

  if (queue_.empty()) {

    return nullptr;

  }

  dequeue_.reactive_semaphore_.Decrease();

  std::unique_ptr<T> data = std::move(queue_.front());

  queue_.pop();

  enqueue_.reactive_semaphore_.Increase();

  return data;

}

template <typename T>

void Queue<T>::EnqueueCallbackInternal(EnqueueCallback callback) {

  std::unique_ptr<T> data = callback.Run();

  ASSERT(data != nullptr);

  std::lock_guard<std::mutex> lock(mutex_);

  enqueue_.reactive_semaphore_.Decrease();

  queue_.push(std::move(data));

  dequeue_.reactive_semaphore_.Increase();

}

  common::OnceClosure callback_on_empty_;

};

#include "os/linux_generic/queue.tpp"

template <typename T>

Queue<T>::Queue(size_t capacity) : enqueue_(capacity), dequeue_(0){};

template <typename T>

Queue<T>::~Queue() {

  ASSERT_LOG(enqueue_.handler_ == nullptr, "Enqueue is not unregistered");

  ASSERT_LOG(dequeue_.handler_ == nullptr, "Dequeue is not unregistered");

};

template <typename T>

void Queue<T>::RegisterEnqueue(Handler* handler, EnqueueCallback callback) {

  std::lock_guard<std::mutex> lock(mutex_);

  ASSERT(enqueue_.handler_ == nullptr);

  ASSERT(enqueue_.reactable_ == nullptr);

  enqueue_.handler_ = handler;

  enqueue_.reactable_ = enqueue_.handler_->thread_->GetReactor()->Register(

      enqueue_.reactive_semaphore_.GetFd(),

      base::Bind(&Queue<T>::EnqueueCallbackInternal, base::Unretained(this), std::move(callback)),

      base::Closure());

}

template <typename T>

void Queue<T>::UnregisterEnqueue() {

  Reactor* reactor = nullptr;

  Reactor::Reactable* to_unregister = nullptr;

  bool wait_for_unregister = false;

  {

    std::lock_guard<std::mutex> lock(mutex_);

    ASSERT(enqueue_.reactable_ != nullptr);

    reactor = enqueue_.handler_->thread_->GetReactor();

    wait_for_unregister = (!enqueue_.handler_->thread_->IsSameThread());

    to_unregister = enqueue_.reactable_;

    enqueue_.reactable_ = nullptr;

    enqueue_.handler_ = nullptr;

  }

  reactor->Unregister(to_unregister);

  if (wait_for_unregister) {

    reactor->WaitForUnregisteredReactable(std::chrono::milliseconds(1000));

  }

}

template <typename T>

void Queue<T>::RegisterDequeue(Handler* handler, DequeueCallback callback) {

  std::lock_guard<std::mutex> lock(mutex_);

  ASSERT(dequeue_.handler_ == nullptr);

  ASSERT(dequeue_.reactable_ == nullptr);

  dequeue_.handler_ = handler;

  dequeue_.reactable_ = dequeue_.handler_->thread_->GetReactor()->Register(

      dequeue_.reactive_semaphore_.GetFd(), callback, base::Closure());

}

template <typename T>

void Queue<T>::UnregisterDequeue() {

  Reactor* reactor = nullptr;

  Reactor::Reactable* to_unregister = nullptr;

  bool wait_for_unregister = false;

  {

    std::lock_guard<std::mutex> lock(mutex_);

    ASSERT(dequeue_.reactable_ != nullptr);

    reactor = dequeue_.handler_->thread_->GetReactor();

    wait_for_unregister = (!dequeue_.handler_->thread_->IsSameThread());

    to_unregister = dequeue_.reactable_;

    dequeue_.reactable_ = nullptr;

    dequeue_.handler_ = nullptr;

  }

  reactor->Unregister(to_unregister);

  if (wait_for_unregister) {

    reactor->WaitForUnregisteredReactable(std::chrono::milliseconds(1000));

  }

}

template <typename T>

std::unique_ptr<T> Queue<T>::TryDequeue() {

  std::lock_guard<std::mutex> lock(mutex_);

  if (queue_.empty()) {

    return nullptr;

  }

  dequeue_.reactive_semaphore_.Decrease();

  std::unique_ptr<T> data = std::move(queue_.front());

  queue_.pop();

  enqueue_.reactive_semaphore_.Increase();

  return data;

}

template <typename T>

void Queue<T>::EnqueueCallbackInternal(EnqueueCallback callback) {

  std::unique_ptr<T> data = callback.Run();

  ASSERT(data != nullptr);

  std::lock_guard<std::mutex> lock(mutex_);

  enqueue_.reactive_semaphore_.Decrease();

  queue_.push(std::move(data));

  dequeue_.reactive_semaphore_.Increase();

}

}  // namespace os

}  // namespace bluetooth