给了这个样品
#include <ctime>
#include <iostream>
#include <string>
#include <boost/array.hpp>
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/asio.hpp>
using boost::asio::ip::udp;
std::string make_daytime_string()
{
using namespace std; // For time_t, time and ctime;
time_t now = time(0);
return ctime(&now);
}
class udp_server
{
public:
udp_server(boost::asio::io_service& io_service, unsigned short port)
: socket_(io_service, udp::endpoint(udp::v4(), port))
{
start_receive();
}
private:
void start_receive()
{
socket_.async_receive_from(
boost::asio::buffer(recv_buffer_), remote_endpoint_,
boost::bind(&udp_server::handle_receive, this,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
}
void handle_receive(const boost::system::error_code& error,
std::size_t /*bytes_transferred*/)
{
if (!error || error == boost::asio::error::message_size)
{
boost::shared_ptr<std::string> message(
new std::string(make_daytime_string()));
socket_.async_send_to(boost::asio::buffer(*message), remote_endpoint_,
boost::bind(&udp_server::handle_send, this, message,
boost::asio::placeholders::error,
boost::asio::placeholders::bytes_transferred));
start_receive();
}
}
void handle_send(boost::shared_ptr<std::string> /*message*/,
const boost::system::error_code& /*error*/,
std::size_t /*bytes_transferred*/)
{
}
udp::socket socket_;
udp::endpoint remote_endpoint_;
boost::array<char, 1> recv_buffer_;
};
int main()
{
try
{
boost::asio::io_service io_service;
std::vector<std::shared_ptr<udp_server>> servers;
for (unsigned short port = 5000; port != 6000; ++port)
{
servers.push_back(std::shared_ptr<udp_server>(new
udp_server(io_service, port)));
}
io_service.run();
}
catch (std::exception& e)
{
std::cerr << e.what() << std::endl;
}
return 0;
}
我有1000个udp_client,它们使用给定的端口发送1000个请求:./udp_client端口&
例如
./ udp_client 5000& ./udp_client 5001& ... ./udp_client 6000
我想同时处理所有请求 我是否需要在单独的线程中运行每个服务器? 如果是这样,那么io_service的一个实例就足够了,或者我需要为每个线程创建一个实例。
谢谢。