2 * Copyright 2015 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 #include <folly/wangle/concurrent/BlockingQueue.h>
19 #include <folly/LifoSem.h>
20 #include <folly/MPMCQueue.h>
22 namespace folly { namespace wangle {
25 class LifoSemMPMCQueue : public BlockingQueue<T> {
27 explicit LifoSemMPMCQueue(size_t max_capacity) : queue_(max_capacity) {}
29 void add(T item) override {
30 if (!queue_.write(std::move(item))) {
31 throw std::runtime_error("LifoSemMPMCQueue full, can't add item");
38 while (!queue_.read(item)) {
45 return queue_.capacity();
48 size_t size() override {