CODEWITHSUNDEEP
multithreadingboostc++11boost-asio
avhacker
avhacker

Reputation: 677

C++11 thread crash when access boost::asio::ip::tcp::socket

I found that accessing tcp::socket from a std::thread will cause program terminated. Here's the sample program from boost. http://www.boost.org/doc/libs/1_53_0/doc/html/boost_asio/example/echo/blocking_tcp_echo_server.cpp Compile it: g++ blocking_tcp_echo_server.cpp -std=c++11 -lboost_system -lboost_thread -pthread

So far, everthing works fine. But if you replace the boost::thread with std::thread (and #include ), the program will crash(terminated) when it access sock member ( socket::read_some() ).

Error message: terminate called without an active exception.

Any idea?

Upvotes: 2

Views: 932

Answers (1)

superK
superK

Reputation: 3982

That's the difference between boost::thread and std::thread. I have seen the code, and you can fix it to work with std::thread, just like this:

void server(boost::asio::io_service& io_service, short port) {
    // ...
    std::thread t(boost::bind(session, sock));
    t.detach();
}

It seems you must detach or join the thread when you use std::thread.

Code:

#include <iostream>
#include <thread>

int main(void) {
    std::thread t([](){std::cout << "will throw exception" << std::endl;});
//  t.detach();
    return 0;
}

It will throw exception if not detach or not join or not link pthread

Upvotes: 1

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