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UAtomicQueue.h
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146 lines (121 loc) · 3.25 KB
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/***************************
@Author: Chunel
@Contact: chunel@foxmail.com
@File: UAtomicQueue.h
@Time: 2021/7/2 11:28 下午
@Desc: 设计了一个安全队列
***************************/
#ifndef CGRAPH_UATOMICQUEUE_H
#define CGRAPH_UATOMICQUEUE_H
#include <memory>
#include <mutex>
#include <queue>
#include <condition_variable>
#include "../UThreadPoolDefine.h"
#include "UQueueObject.h"
CGRAPH_NAMESPACE_BEGIN
template<typename T>
class UAtomicQueue : public UQueueObject {
public:
UAtomicQueue() = default;
/**
* 等待弹出
* @param value
*/
CVoid waitPop(T& value) {
CGRAPH_UNIQUE_LOCK lk(mutex_);
cv_.wait(lk, [this] { return !queue_.empty(); });
value = std::move(*queue_.front());
queue_.pop();
}
/**
* 尝试弹出
* @param value
* @return
*/
CBool tryPop(T& value) {
CBool result = false;
if (!queue_.empty() && mutex_.try_lock()) {
if (!queue_.empty()) {
value = std::move(*queue_.front());
queue_.pop();
result = true;
}
mutex_.unlock();
}
return result;
}
/**
* 尝试弹出多个任务
* @param values
* @param maxPoolBatchSize
* @return
*/
CBool tryPop(std::vector<T>& values, int maxPoolBatchSize) {
CBool result = false;
if (!queue_.empty() && mutex_.try_lock()) {
while (!queue_.empty() && maxPoolBatchSize-- > 0) {
values.emplace_back(std::move(*queue_.front()));
queue_.pop();
result = true;
}
mutex_.unlock();
}
return result;
}
/**
* 阻塞式等待弹出
* @return
*/
std::unique_ptr<T> popWithTimeout(CMSec ms) {
CGRAPH_UNIQUE_LOCK lk(mutex_);
if (!cv_.wait_for(lk, std::chrono::milliseconds(ms), [this] { return !queue_.empty(); })) {
return nullptr;
}
std::unique_ptr<T> result = std::move(queue_.front());
queue_.pop(); // 如果等成功了，则弹出一个信息
return result;
}
/**
* 非阻塞式等待弹出
* @return
*/
std::unique_ptr<T> tryPop() {
CGRAPH_LOCK_GUARD lk(mutex_);
if (queue_.empty()) { return std::unique_ptr<T>(); }
std::unique_ptr<T> ptr = std::move(queue_.front());
queue_.pop();
return ptr;
}
/**
* 传入数据
* @param value
*/
CVoid push(T&& value) {
std::unique_ptr<typename std::remove_reference<T>::type> \
task(c_make_unique<typename std::remove_reference<T>::type>(std::forward<T>(value)));
while (true) {
if (mutex_.try_lock()) {
queue_.push(std::move(task));
mutex_.unlock();
break;
} else {
CGRAPH_YIELD();
}
}
cv_.notify_one();
}
/**
* 判定队列是否为空
* @return
*/
CBool empty() {
CGRAPH_LOCK_GUARD lk(mutex_);
return queue_.empty();
}
CGRAPH_NO_ALLOWED_COPY(UAtomicQueue)
private:
std::queue<std::unique_ptr<T>> queue_;
};
CGRAPH_NAMESPACE_END
#endif //CGRAPH_UATOMICQUEUE_H