2 * Copyright 2017 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.
22 #include <glog/logging.h>
26 // Some queue implementations (for example, LifoSemMPMCQueue or
27 // PriorityLifoSemMPMCQueue) support both blocking (BLOCK) and
28 // non-blocking (THROW) behaviors.
29 enum class QueueBehaviorIfFull { THROW, BLOCK };
31 class QueueFullException : public std::runtime_error {
32 using std::runtime_error::runtime_error; // Inherit constructors.
38 virtual ~BlockingQueue() = default;
39 virtual void add(T item) = 0;
40 virtual void addWithPriority(T item, int8_t /* priority */) {
43 virtual uint8_t getNumPriorities() {
47 virtual size_t size() = 0;