C++ 构造函数失败后初始化boost::asio套接字
我创建了一个类来广播UDP消息,如下所示:C++ 构造函数失败后初始化boost::asio套接字,c++,sockets,boost,boost-asio,shared-ptr,C++,Sockets,Boost,Boost Asio,Shared Ptr,我创建了一个类来广播UDP消息,如下所示: #define _CRT_SECURE_NO_WARNINGS #include <ctime> #include <iostream> #include <string> #include <queue> #include <boost/array.hpp> #include <boost/bind.hpp> #include <boost/shared_ptr.hpp&g
#define _CRT_SECURE_NO_WARNINGS
#include <ctime>
#include <iostream>
#include <string>
#include <queue>
#include <boost/array.hpp>
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/asio.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/thread.hpp>
#include <boost/thread/thread.hpp>
#include <boost/chrono.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
using boost::asio::ip::udp;
using std::cout;
using std::cin;
using std::endl;
using std::string;
using namespace std;
template<typename T>
std::string toString(const T& value);
std::string IntToString(const int& i);
class UdpCore
{
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
UdpCore(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(io_service, show);
}
~UdpCore()
{
// show exit message
cout << "Exiting UDP Core." << endl;
}
// initialize
void Initialize(boost::asio::io_service& io_service, bool show = false)
{
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_getsend = new boost::thread(&UdpCore::Callable_GetSend, this, interval, boost::ref(i_listen), boost::ref(message));
threads.add_thread(thread_getsend); // get/send thread
stop = false;
showBroadcast = show;
i_getsend = 0;
i_listen = 0;
i_main = 0;
i_message = 0;
message.clear();
initialize = true;
}
void GetInfo()
{
multicast_address = "192.168.0.255";
multicast_port = 13000;
interval = 500;
}
// start the threads
void Start()
{
// Wait till they are finished
threads.join_all();
}
// stop the threads
void Stop()
{
// warning message
cout << "Stopping all threads." << endl;
// signal the threads to stop (thread-safe)
stopMutex.lock();
stop = true;
stopMutex.unlock();
// wait for the threads to finish
thread_main->interrupt(); // in case not interrupted by operator()
threads.interrupt_all();
threads.join_all();
// close socket after everything closes
socket.close();
}
void Callable_Listen(int interval, int& count)
{
while (!stop)
{
if (message != "")
socket.async_send_to(boost::asio::buffer(message), endpoint, [this](boost::system::error_code ec, std::size_t /*length*/)
{
stopMutex.lock();
if (showBroadcast)
{
cout << i_message << " - " << message << endl; // show count
}
message.clear(); //clear after sending
stopMutex.unlock();
});
++i_message;
// wait routine
boost::this_thread::sleep(boost::posix_time::millisec(interval));
boost::this_thread::interruption_point();
++i_listen;
}
}
void Callable_GetSend(int interval, int& count, string& userInput)
{
while (!stop)
{
stopMutex.lock();
cout << "Callable_GetSend [" << count++ << "]. Enter message: ";
getline(cin, userInput);
if (message != "")
socket.async_send_to(boost::asio::buffer(message), endpoint, [this](boost::system::error_code ec, std::size_t /*length*/)
{
if (showBroadcast)
{
cout << i_message << " - " << message << endl; // show count
}
message.clear(); //clear after sending
});
stopMutex.unlock();
// wait routine
boost::this_thread::sleep(boost::posix_time::millisec(interval));
boost::this_thread::interruption_point();
++i_getsend;
++i_message;
}
}
// Thread function
void operator () ()
{
while (!stop)
{
if (message == "STOP")
{
try
{
this->Stop();
}
catch (exception e)
{
cout << e.what() << endl;
}
}
boost::this_thread::sleep(boost::posix_time::millisec(interval));
boost::this_thread::interruption_point();
}
}
std::string make_daytime_string()
{
using namespace std; // For time_t, time and ctime;
time_t now = time(0);
std::string result = ctime(&now);
return result.erase(result.length() - 1, 1);
}
std::string some_string()
{
std::string result;
result = make_daytime_string();
return result;
}
};
int main()
{
try
{
boost::asio::io_service io_service;
UdpCore mt(io_service, "192.168.0.255", 13000, 5000, false);
mt.Start();
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
}
#define _CRT_SECURE_NO_WARNINGS
#include <ctime>
#include <iostream>
#include <string>
#include <queue>
#include <boost/array.hpp>
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <boost/asio.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/thread.hpp>
#include <boost/thread/thread.hpp>
#include <boost/chrono.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
using boost::asio::ip::udp;
using std::cout;
using std::cin;
using std::endl;
using std::string;
using namespace std;
template<typename T>
std::string toString(const T& value);
std::string IntToString(const int& i);
class UdpCore
{
private:
boost::asio::ip::udp::endpoint endpoint;
boost::shared_ptr<udp::socket> socketPtr;
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
UdpCore(boost::asio::io_service& io_service, std::string multicast_address, unsigned short multicast_port, int interval, bool show = false)
: multicast_address(multicast_address),
multicast_port(multicast_port),
interval(interval),
showBroadcast(show)
{
UdpCore(io_service, show);
}
UdpCore(boost::asio::io_service& io_service, bool show = false)
: showBroadcast(show)
{
Initialize(io_service, show);
}
// destructor
~UdpCore()
{
// show exit message
cout << "Exiting UDP Core." << endl;
}
// initialize
void Initialize(boost::asio::io_service& io_service, bool show = false)
{
if (initialize == false)
{
GetInfo();
}
boost::asio::ip::udp::endpoint endpoint(boost::asio::ip::address::from_string(multicast_address), multicast_port);
socketPtr = boost::make_shared<udp::socket>(boost::ref(io_service), endpoint.protocol());
socketPtr->set_option(boost::asio::ip::udp::socket::reuse_address(true)); // no need
thread_main = new boost::thread(boost::ref(*this));
thread_getsend = new boost::thread(&UdpCore::Callable_GetSend, this, interval, boost::ref(i_listen), boost::ref(message));
threads.add_thread(thread_getsend); // get/send thread
stop = false;
showBroadcast = show;
i_getsend = 0;
i_listen = 0;
i_main = 0;
i_message = 0;
message.clear();
initialize = true;
}
void GetInfo()
{
multicast_address = "192.168.0.255";
multicast_port = 13000;
interval = 500;
}
// start the threads
void Start()
{
// Wait till they are finished
threads.join_all();
}
// stop the threads
void Stop()
{
// warning message
cout << "Stopping all threads." << endl;
// signal the threads to stop (thread-safe)
stopMutex.lock();
stop = true;
stopMutex.unlock();
// wait for the threads to finish
thread_main->interrupt(); // in case not interrupted by operator()
threads.interrupt_all();
threads.join_all();
// close socket after everything closes
socketPtr->close();
}
void Callable_Listen(int interval, int& count)
{
while (!stop)
{
if (message != "")
socketPtr->async_send_to(boost::asio::buffer(message), endpoint, [this](boost::system::error_code ec, std::size_t /*length*/)
{
stopMutex.lock();
if (showBroadcast)
{
cout << i_message << " - " << message << endl; // show count
}
message.clear(); //clear after sending
stopMutex.unlock();
});
++i_message;
// wait routine
boost::this_thread::sleep(boost::posix_time::millisec(interval));
boost::this_thread::interruption_point();
++i_listen;
}
}
void Callable_GetSend(int interval, int& count, string& userInput)
{
while (!stop)
{
stopMutex.lock();
cout << "Callable_GetSend [" << count++ << "]. Enter message: ";
getline(cin, userInput);
if (message != "")
socketPtr->async_send_to(boost::asio::buffer(message), endpoint, [this](boost::system::error_code ec, std::size_t /*length*/)
{
if (showBroadcast)
{
cout << i_message << " - " << message << endl; // show count
}
message.clear(); //clear after sending
});
stopMutex.unlock();
// wait routine
boost::this_thread::sleep(boost::posix_time::millisec(interval));
boost::this_thread::interruption_point();
++i_getsend;
++i_message;
}
}
// Thread function
void operator () ()
{
while (!stop)
{
if (message == "STOP")
{
try
{
this->Stop();
}
catch (exception e)
{
cout << e.what() << endl;
}
}
boost::this_thread::sleep(boost::posix_time::millisec(interval));
boost::this_thread::interruption_point();
}
}
std::string make_daytime_string()
{
using namespace std; // For time_t, time and ctime;
time_t now = time(0);
std::string result = ctime(&now);
return result.erase(result.length() - 1, 1);
}
std::string some_string()
{
std::string result;
result = make_daytime_string();
return result;
}
};
int main()
{
try
{
boost::asio::io_service io_service;
UdpCore mt(io_service, false);
mt.Start();
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
}
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使用boost::asio::ip::udp;
使用std::cout;
使用std::cin;
使用std::endl;
使用std::string;
使用名称空间std;
模板
std::字符串到字符串(常量T和值);
std::string IntToString(const int&i);
UdpCore类
{
私人:
boost::asio::ip::udp::endpoint;
boost::asio::ip::udp::socket;
字符串地址;
无符号短多播_端口;
boost::thread\u group threads;//线程组
boost::thread*thread_main;//主线程
boost::thread*thread\u listen;//listen thread
boost::thread*thread\u getsend;//获取/发送线程
boost::mutex stopMutex;
bool初始化=false;
bool-stop,showBroadcast;
int i_getsend、i_listen、i_main、i_message、interval;
字符串消息;
公众:
//建造师
UdpCore(boost::asio::io_服务和io_服务,std::string多播_地址,无符号短多播_端口,int interval,bool show=false)
:端点(boost::asio::ip::address::from_字符串(多播地址)、多播端口),
套接字(io_服务,endpoint.protocol()),
多播地址(多播地址),
多播_端口(多播_端口),
间隔(间隔),,
showBroadcast(show)
{
初始化(io_服务,显示);
}
~UdpCore()
{
//显示退出消息
cout在第一个示例中,除了成员端点
和套接字
之外,您还可以在Initialize()
函数中创建一个本地端点
和套接字
。后面的对象只是未使用过而已-但是,成员端点
已正确初始化
另一方面,在第二个示例中,您没有正确初始化成员端点
。相反,您再次创建了一个本地端点。但请注意,在整个代码中使用的端点是成员端点
底线是:删除本地对象并为成员添加正确的初始化。您能说得更具体一点吗?您说“它不工作”是什么意思?@IgorR.,我的接收器代码无法显示任何内容。WireShark显示未成功传输,这与切换到套接字指针之前不同。您能告诉我它是如何未正确初始化的吗?我如何更正它们?我看不到任何错误。谢谢。@CaTx查看UdpCore构造函数的初始化列表。您在那里执行端点吗(boost::asio::ip::address::from_字符串(多播_地址),多播_端口)
。第二个示例中缺少这一行。这是我的初衷。我想在收到用户输入后对其进行初始化。这也是这个人的目标,他似乎成功了。@CaTx是否要将端点设置在ctor init列表之外?可以这样做,有关详细信息,请参阅asio参考。但目前您从未初始化过请将其全部初始化。相反,您创建了另一个本地端点对象,以后不再使用。(由于您对我的答案进行注释,因此不需要附加标记,因此将其删除。)是的,我希望在ctor init列表之后对其进行初始化。我认为此行初始化端点:boost::asio::ip::udp::endpoint endpoint(boost::asio::ip::address::from_字符串(多播_地址),多播_端口);
//boost::asio::ip::udp::socket socket;
boost::shared_ptr<udp::socket> socketPtr;
//boost::asio::ip::udp::socket socket(io_service, endpoint.protocol());
//socket.set_option(boost::asio::ip::udp::socket::reuse_address(true));
socketPtr = boost::make_shared<udp::socket>(boost::ref(io_service), endpoint.protocol());
socketPtr->set_option(boost::asio::ip::udp::socket::reuse_address(true));
//socket.async_send_to(boost::asio::buffer(message), endpoint, [this](boost::system::error_code ec, std::size_t /*length*/)
socketPtr->async_send_to(boost::asio::buffer(message), endpoint, [this](boost::system::error_code ec, std::size_t /*length*/)