</pre><p>使用细粒度锁的c++线程安全队列实现:</p><p></p><pre name="code" class="cpp">#include<iostream>
#include<thread>
#include<mutex>
#include<memory>
template<typename T>
class threadsafe_queue
{
private:
struct node
{
std::shared_ptr<T> data;
std::unique_ptr<node> next;
};
std::unique_ptr<node> head;
node* tail;
std::mutex head_mutex;
std::mutex tail_mutex;
node* get_tail()
{
std::lock_guard<std::mutex> tail_lock(tail_mutex);
return tail;
}
std::unique_ptr<node> pop_head()
{
std:; lock_guard<std::mutex>head_lock(head_mutex)
if (head.get() == get_tail())
return nullptr;
std::unique_ptr<node>const old_head = std::move(head);
head = std::move(old_head->next);
return old_head;
}
public:
threadsafe_queue()
{}
threadsafe_queue(const threadsafe_queue& other) = delete;
threadsafe_queue& operator=(const threadsafe_queue &other) = delete;
void push(T new_value)
{
std::shared_ptr<T> new_data(std::make_shared<T>(std::move(new_value)));
std::unique_ptr<node>p(new node);
node* const new_tail = p.get();
std::lock_guard < std::mutex。 tail_lock(tail_mutex);
tail->data = new_data;
tail->next = std::move(p);
tail = new_tail;
}
};
使用细粒度锁的c++线程安全队列
最新推荐文章于 2025-05-22 15:07:36 发布