【发布时间】:2019-05-17 19:57:30
【问题描述】:
加速版本:1.68
C++ 标准:C++17
开发平台:MSVC 2017
操作系统:Windows 10 专业版
PC 架构:x64
我正在使用 Boost::Asio 创建一个异步 TCP 连接。在第一次成功连接期间,一切正常。由于某些问题,它的套接字中断它尝试重新连接,那时我得到了运行时错误。即使我收到运行时错误,程序仍然能够接收数据。
起初我试图在我的主函数的 while(无限)循环(主线程)中重新连接套接字,但我得到了错误。 我在
中遇到错误D:\vcpkg\installed\x64-windows\include\boost\asio\detail\impl\win_iocp_io_context.ipp
size_t win_iocp_io_context::run(boost::system::error_code& ec)
{
if (::InterlockedExchangeAdd(&outstanding_work_, 0) == 0)
{
stop();
ec = boost::system::error_code();
return 0;
}
win_iocp_thread_info this_thread;
thread_call_stack::context ctx(this, this_thread);
size_t n = 0;
while (do_one(INFINITE, ec))
if (n != (std::numeric_limits<size_t>::max)())
++n;
return n;
}
当 n = 13 时在线
while (do_one(INFINITE, ec))
一旦检测到连接断开或套接字关闭,我通过在接收和发送处理程序中添加连接调用来解决错误。
有人可以解释为什么我在尝试从主线程重新连接时遇到问题,并且当我在 io_context 线程中的套接字被破坏后立即尝试重新连接时问题得到解决。
在连接丢失并且 io_context 线程退出后,我在调用 run 之前确实重新启动了上下文。
在我的主要功能中循环:
while (true)
{
fmt::print("Socket Alive : {}\n", as.isSocketAlive());
while(not as.isSocketAlive() and not as.isConnectionInProcess())
as.connectSocket();
if (not as.isSocketAlive())
continue;
if (as.isReadComplete())
as.sendDataSocket(as.getRecievedData());
}
我的异步套接字函数:
void AsyncSocket::runContext(void)
{
std::atomic_store(std::addressof(this->contextExitted), false);
this->context.run();
std::atomic_store(std::addressof(this->contextExitted), true);
}
void AsyncSocket::restartContext(void)
{
if (std::atomic_load(std::addressof(this->contextExitted)))
this->context.restart();
}
void AsyncSocket::connectSocket(void)
{
std::atomic_store(std::addressof(this->socketAlive), false);
std::atomic_store(std::addressof(this->connectionInProcess), true);
//this->socket.async_connect(this->endpoint, std::bind(&AsyncSocket::connectHandler, this, boost::asio::placeholders::error));
this->socket.async_connect(this->endpoint, boost::bind(&AsyncSocket::connectHandler, this, boost::asio::placeholders::error));
//this->socket.connect(this->endpoint, );
if (this->context.stopped())
{
if (this->isContextExitted())
this->restartContext();
this->t = std::thread(&AsyncSocket::runContext, this);
}
std::call_once(this->firstRun, [this]() {
t = std::thread(&AsyncSocket::runContext, this);
});
}
void AsyncSocket::recieveHandler(const boost::system::error_code& ec, std::size_t bytes_transferred)
{
fmt::print("In recieve handler, Error Code : {}\nBytes recieved : {}\n", ec.message(), bytes_transferred);
try
{
std::atomic_store(std::addressof(this->receivingData), false);
if (ec not_eq boost::system::errc::success)
{
#ifdef _DEBUG
fmt::print("Error in WebSocket::recieveHandler. Error : {0}\n", ec.message());
#endif // _DEBUG
LOG_ERROR << ec.message();
switch (ec.value())
{
case boost::asio::error::eof :
case boost::asio::error::connection_reset :
case boost::asio::error::connection_aborted :
case boost::asio::error::network_reset :
case boost::asio::error::network_down :
case boost::asio::error::network_unreachable :
if (this->isSocketAlive() and this->socket.is_open())
this->socket.close();
std::atomic_store(std::addressof(this->socketAlive), false);
this->connectSocket();// If I comment this line and try to reconnect in my main function (infinite while loop), I get mentioned run-time error
return;
default:
break;
}
}
else
{
this->readDataQueue.push(std::string(reinterpret_cast <const char *> (this->readDataBuffer.data()), bytes_transferred));
std::atomic_store(std::addressof(this->readComplete), true);
}
}
catch (const std::exception& ex)
{
#ifdef _DEBUG
fmt::print("Error in WebSocket::sendHandler. Error : {0}\n", ex.what());
#endif // _DEBUG
LOG_ERROR << "Exception : " << ex.what() << "Data : " << this->writeDataQueue.front();
}
this->recieveDataSocket();
}
void AsyncSocket::sendHandler(const boost::system::error_code& ec, std::size_t bytes_transferred)
{
fmt::print("In send handler, Error Code : {}\nBytes recieved : {}\n", ec.message(), bytes_transferred);
try
{
if (ec not_eq boost::system::errc::success)
{
#ifdef _DEBUG
fmt::print("Error in WebSocket::recieveHandler. Error : {0}\n", ec.message());
#endif // _DEBUG
LOG_ERROR << ec.message();
switch (ec.value())
{
case boost::asio::error::eof:
case boost::asio::error::connection_reset:
case boost::asio::error::connection_aborted:
case boost::asio::error::network_reset:
case boost::asio::error::network_down:
case boost::asio::error::network_unreachable:
if (this->isSocketAlive() and this->socket.is_open())
this->socket.close();
std::atomic_store(std::addressof(this->socketAlive), false);
this->connectSocket();// If I comment this line and try to reconnect in my main function (infinite while loop), I get mentioned run-time error
return;
default:
break;
}
}
this->writeDataQueue.pop();
std::atomic_init(std::addressof(this->sendingData), false);
this->writeSocket();
}
catch (const std::exception& ex)
{
#ifdef _DEBUG
fmt::print("Error in WebSocket::sendHandler. Error : {0}\n", ex.what());
#endif // _DEBUG
LOG_ERROR << "Exception : " << ex.what() << "Data : " << this->writeDataQueue.front();
}
}
【问题讨论】:
-
日志中有什么?
-
我的日志文件没有显示任何有关错误的信息。
标签: c++ boost boost-asio