为什么 boost 在这种情况下不创建线程（C2248）以及如何创建它？
所以我有这样的代码：
using namespace boost::asio::ip;
using namespace std;
void request_response_loop(boost::asio::ip::tcp::socket& socket)
{
http_request request(socket);
http_response response;
response.body = "<head></head><body><h1>It Rocks!</h1></body>";
response.send(socket);
socket.close();
cout << "connection resolved." << endl;
}
void acceptor_loop(){
boost::asio::io_service io_service;
int m_nPort = 12345;
tcp::acceptor acceptor(io_service, tcp::endpoint(tcp::v4(), m_nPort));
cout << "Waiting for connection..." << endl;
while(true)
{
try
{
tcp::socket socket(io_service);
acceptor.accept(socket);
cout << "connection accepted." << endl;
boost::thread workerThread2(request_response_loop, socket); // here it does not compile because of C2248
}
catch(exception &e)
{
cerr << e.what() << endl; //"The parameter is incorrect" exception
}
}
}
int main()
{
boost::thread workerThread(acceptor_loop);
cin.get();
}
它给了我错误：
Error 1 error C2248: boost::noncopyable_::noncopyable::noncopyable: "boost::noncopyable_::noncopyable" boost\asio\basic_io_object.hpp 93
如何能够在我用于套接字接受的另一个线程中运行我的 request_response_loop 函数？
So I have code like:
using namespace boost::asio::ip;
using namespace std;
void request_response_loop(boost::asio::ip::tcp::socket& socket)
{
http_request request(socket);
http_response response;
response.body = "<head></head><body><h1>It Rocks!</h1></body>";
response.send(socket);
socket.close();
cout << "connection resolved." << endl;
}
void acceptor_loop(){
boost::asio::io_service io_service;
int m_nPort = 12345;
tcp::acceptor acceptor(io_service, tcp::endpoint(tcp::v4(), m_nPort));
cout << "Waiting for connection..." << endl;
while(true)
{
try
{
tcp::socket socket(io_service);
acceptor.accept(socket);
cout << "connection accepted." << endl;
boost::thread workerThread2(request_response_loop, socket); // here it does not compile because of C2248
}
catch(exception &e)
{
cerr << e.what() << endl; //"The parameter is incorrect" exception
}
}
}
int main()
{
boost::thread workerThread(acceptor_loop);
cin.get();
}
It gives me error:
Error 1 error C2248: boost::noncopyable_::noncopyable::noncopyable: "boost::noncopyable_::noncopyable" boost\asio\basic_io_object.hpp 93
How to make it possible to run my request_response_loop function in another thread that one I use for socket accepting?
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评论（2）
为了扩展 Ben 的答案，
boost::shared_ptr是这里的常用机制：To expand on Ben's answer,
boost::shared_ptr<>is the usual mechanism here:下次显示完整的错误消息。
您的问题是您的线程过程需要对套接字的引用，但套接字是局部变量。
acceptor_loop函数不会等待，因此一旦超出范围，它就会销毁套接字。对于线程之间传递的变量，您需要使用动态或静态生命周期，而不是自动生命周期。
Next time show the entire error message.
Your problem is that your thread procedure wants a reference to the socket, but the socket is a local variable. The
acceptor_loopfunction doesn't wait, so it will destroy the socket as soon as it goes out of scope.You need to use dynamic or static lifetime, never automatic, for variables passed between threads.