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111 lines
2.5 KiB
111 lines
2.5 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#pragma once
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#include <condition_variable> // NOLINT
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#include <deque>
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#include <mutex> // NOLINT
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#include <utility>
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namespace paddle {
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namespace framework {
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template <typename T>
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class BlockingQueue {
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public:
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void Push(const T &item) {
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{
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std::lock_guard<std::mutex> g(mutex_);
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q_.emplace_back(item);
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}
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cv_.notify_one();
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}
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void Push(T &&item) {
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{
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std::lock_guard<std::mutex> g(mutex_);
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q_.emplace_back(std::move(item));
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}
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cv_.notify_one();
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}
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template <typename U>
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void Extend(const U &items) {
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{
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std::lock_guard<std::mutex> g(mutex_);
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for (auto &item : items) {
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q_.emplace_back(item);
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}
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}
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cv_.notify_all();
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}
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template <typename U>
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void Extend(U &&items) {
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{
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std::lock_guard<std::mutex> g(mutex_);
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for (auto &item : items) {
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q_.emplace_back(std::move(item));
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}
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}
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cv_.notify_all();
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}
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std::deque<T> PopAll(size_t ms, bool *timeout) {
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auto time =
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std::chrono::system_clock::now() + std::chrono::milliseconds(ms);
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std::unique_lock<std::mutex> lock(mutex_);
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*timeout = !cv_.wait_until(lock, time, [this] { return !q_.empty(); });
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std::deque<T> ret;
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if (!*timeout) {
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std::swap(ret, q_);
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}
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return ret;
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}
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T Pop() {
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std::unique_lock<std::mutex> lock(mutex_);
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cv_.wait(lock, [=] { return !q_.empty(); });
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T rc(std::move(q_.front()));
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q_.pop_front();
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return rc;
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}
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void Pop(T *t) {
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std::unique_lock<std::mutex> lock(mutex_);
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cv_.wait(lock, [=] { return !q_.empty(); });
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*t = std::move(q_.front());
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q_.pop_front();
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}
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size_t Size() {
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std::lock_guard<std::mutex> lock(mutex_);
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return q_.size();
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}
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void Clear() {
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std::lock_guard<std::mutex> lock(mutex_);
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std::deque<T>().swap(q_);
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}
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private:
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std::mutex mutex_;
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std::condition_variable cv_;
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std::deque<T> q_;
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};
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} // namespace framework
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} // namespace paddle
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