[英]C++ std::thread of a member function
I'm trying to program a command line server that would receive information from a serial port, parse it, and record it in an internal object. 我正在尝试编写一个命令行服务器,它将从串行端口接收信息,解析它,并将其记录在内部对象中。
Then upon request from a client the server would return the requested information. 然后,根据客户端的请求,服务器将返回所请求的信息。
What I want to do is put the receiver & parser parts in a separated thread in order to have the server running along side, not interfering with the data collection. 我想要做的是将接收器和解析器部件放在一个单独的线程中,以使服务器一起运行,而不是干扰数据收集。
#include <iostream>
#include <thread>
class exampleClass{
std::thread *processThread;
public void completeProcess(){
while(1){
processStep1();
if (verification()){processStep2()}
}
};
void processStep1(){...};
void processStep2(){...};
bool verification(){...};
void runThreaded();
} // End example class definition
// The idea being that this thread runs independently
// until I call the object's destructor
exampleClass::runThreaded(){
std::thread processThread(&exampleClass::completeProcess, this);
} // Unfortunately The program ends up crashing here with CIGARET
You are running a local thread inside a member function. 您正在成员函数中运行本地线程。 You have to join it or detach it and, since it is local, you have to do this in the function itself: 您必须加入或分离它,因为它是本地的,您必须在函数本身中执行此操作:
exampleClass::runThreaded()
{
std::thread processThread(&exampleClass::completeProcess, this);
// more stuff
processThread.join();
} //
I am guessing what you really want is to launch a data member thread instead of launching a local one. 我猜你真正想要的是启动数据成员线程而不是启动本地线程。 If you do this, you still have to join it somewhere, for example in the destructor. 如果你这样做,你仍然必须在某个地方加入它,例如在析构函数中。 In this case, your method should be 在这种情况下,您的方法应该是
exampleClass::runThreaded()
{
processThread = std::thread(&exampleClass::completeProcess, this);
}
and the destructor 和析构函数
exampleClass::~exampleClass()
{
processThread.join();
}
and processThread
should be an std::thread
, not a pointer to one. 和processThread
应该是一个std::thread
,而不是指向一个的指针。
Just a note on design: if you are to have a runThreaded
method acting on a thread data member, you have to be very careful about not calling it more than once before the thread is joined. 关于设计的注意事项:如果要使用runThreaded
方法作用于线程数据成员,则必须非常小心在连接线程之前不要多次调用它。 It might make more sense to launch the thread in the constructor and join it in the destructor. 在构造函数中启动线程并将其连接到析构函数中可能更有意义。
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