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78 lines
1.8 KiB
78 lines
1.8 KiB
/*
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* Copyright 2019 The Android Open Source Project
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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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*/
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#pragma once
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#include <chrono>
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#include <condition_variable>
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#include <mutex>
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#include <queue>
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namespace bluetooth {
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namespace common {
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template <typename T>
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class BlockingQueue {
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public:
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void push(T data) {
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std::unique_lock<std::mutex> lock(mutex_);
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queue_.push(std::move(data));
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if (queue_.size() == 1) {
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not_empty_.notify_all();
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}
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};
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T take() {
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std::unique_lock<std::mutex> lock(mutex_);
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while (queue_.empty()) {
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not_empty_.wait(lock);
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}
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T data = queue_.front();
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queue_.pop();
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return data;
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};
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// Returns true if take() will not block within a time period
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bool wait_to_take(std::chrono::milliseconds time) {
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std::unique_lock<std::mutex> lock(mutex_);
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while (queue_.empty()) {
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if (not_empty_.wait_for(lock, time) == std::cv_status::timeout) {
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return false;
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}
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}
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return true;
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}
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bool empty() const {
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std::unique_lock<std::mutex> lock(mutex_);
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return queue_.empty();
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};
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void clear() {
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std::unique_lock<std::mutex> lock(mutex_);
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std::queue<T> empty;
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std::swap(queue_, empty);
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};
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private:
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std::queue<T> queue_;
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mutable std::mutex mutex_;
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std::condition_variable not_empty_;
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};
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} // namespace common
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} // namespace bluetooth
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