C ++ Boost:在构造函数之后初始化端点 [英] C++ Boost: initializing endpoint after contructor
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问题描述
我尝试制作一个使用UDP的类.我想在构造函数之后初始化端点,因此我将其修改如下:
I try to make a class to use UDP. I want to have the endpoint initialized after the constructor, so I modify it as follows:
class UdpSender
{
private:
boost::asio::ip::udp::endpoint endpoint;
boost::asio::ip::udp::socket socket;
string multicast_address;
unsigned short multicast_port;
boost::thread_group threads; // thread group
boost::thread* thread_main; // main thread
boost::thread* thread_listen; // listen thread
boost::thread* thread_getsend; // get/send thread
boost::mutex stopMutex;
bool initialize = false;
bool stop, showBroadcast;
int i_getsend, i_listen, i_main, i_message, interval;
string message;
public:
// constructor
UdpSender(boost::asio::io_service& io_service, std::string multicast_address, unsigned short multicast_port, int interval, bool show = false)
:
//endpoint(boost::asio::ip::address::from_string(multicast_address), multicast_port),
//socket(io_service, endpoint.protocol()),
multicast_address(multicast_address),
multicast_port(multicast_port),
interval(interval),
showBroadcast(show)
{
initialize = true;
Initialize(io_service);
}
UdpSender(boost::asio::io_service& io_service)
{
initialize = true;
Initialize();
}
// destructor
~UdpSender()
{
// show exit message
cout << "Exiting UDP Communicator." << endl;
}
// initialize
void Initialize(boost::asio::io_service& io_service)
{
if (initialize == false)
{
GetInfo();
}
boost::asio::ip::udp::endpoint endpoint(boost::asio::ip::make_address(multicast_address), multicast_port);
boost::asio::ip::udp::socket socket(io_service, endpoint.protocol());
socket.set_option(boost::asio::ip::udp::socket::reuse_address(true)); // no need
thread_main = new boost::thread(boost::ref(*this));
//thread_listen = new boost::thread(&UdpSender::Callable_Listen, this, interval, boost::ref(i_listen));
//threads.add_thread(thread_listen); // listen thread
thread_getsend = new boost::thread(&UdpSender::Callable_GetSend, this, interval, boost::ref(i_listen), boost::ref(message));
threads.add_thread(thread_getsend); // get/send thread
stop = false;
i_getsend = 0;
i_listen = 0;
i_main = 0;
i_message = 0;
message.clear();
initialize = true;
}
// ============ other things removed to shorten code ============
};
显然,它不喜欢从原始构造函数中注释掉的这两行:
Apparently, it doesn't like these two lines commented out from the original constructor:
//endpoint(boost::asio::ip::address::from_string(multicast_address), multicast_port),
//socket(io_service, endpoint.protocol()),
它也不像新的构造函数那样:
Nor does it like the new constructor:
UdpSender(boost::asio::io_service& io_service)
我该怎么做才能使所有这些变为可能?非常感谢您的帮助.谢谢.
What can I do to make all this possible? I really appreciate your help. Thanks.
推荐答案
No. According to the Asio reference, the endpoint object should be configured via its constructors.
但是,您可以通过[smart-]指针按住endpoint
,并在构造UdpSender
之后创建它.
However, you could hold the endpoint
by [smart-]pointer, and create it after UdpSender
construction.
// defining:
private:
boost::shared_ptr<boost::asio::ip::udp::endpoint> endpoint;
// creating in Initialize()
endpoint = boost::make_shared<boost::asio::ip::udp::endpoint>(boost::asio::ip::address::from_string(multicast_address), multicast_port);
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