以下是一段用 C ++实现心跳功能的示例代码
时间: 2024-09-18 16:00:48 浏览: 25
在C++中,实现心跳功能通常涉及到定时器(如`std::chrono`库)和网络编程(如`boost.asio`或`std::socket`)。这里是一个基本的示例,展示了如何使用`boost.asio`库创建一个简单的TCP客户端心跳服务:
```cpp
#include <boost/asio.hpp>
#include <iostream>
class HeartbeatClient {
public:
HeartbeatClient(boost::asio::ip::tcp::socket& socket) : socket_(socket), timer_(io_service_) {}
void start_heartbeat() {
// 每隔一定时间发送心跳报文
auto deadline = std::chrono::high_resolution_clock::now() + std::chrono::seconds(5);
timer_.expires_at(deadline);
timer_.async_wait([this](const boost::system::error_code& ec) {
if (!ec) {
send_heartbeat();
start_heartbeat(); // 递归启动下一轮心跳
}
});
}
private:
void send_heartbeat() {
boost::array<char, 10> data = {'H', 'E', 'A', 'R', 'T', 'B', 'E', 'A', 'T'};
boost::system::error_code ignored_error;
socket_.write_some(boost::asio::buffer(data), ignored_error);
}
boost::asio::io_service io_service_;
boost::asio::ip::tcp::socket& socket_; // 连接的socket
boost::asio::deadline_timer timer_;
};
int main() {
try {
boost::asio::io_service io_service;
boost::asio::ip::tcp::resolver resolver(io_service);
boost::asio::ip::tcp::resolver::query query("localhost", "port_number");
boost::asio::ip::tcp::socket socket(io_service);
auto endpoint = resolver.resolve(query);
boost::asio::connect(socket, endpoint);
HeartbeatClient client(socket);
client.start_heartbeat();
io_service.run(); // 主循环等待事件完成
}
catch (std::exception& e) {
std::cerr << "Exception: " << e.what() << std::endl;
}
return 0;
}
```
在这个示例中,`HeartbeatClient`类负责管理心跳任务,`send_heartbeat`方法负责发送心跳数据,而`start_heartbeat`则是通过定时器设置周期性的任务。
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