Boost ASIO shared library trouble - multithreading

Question

I'm basically building a shared library based on the serialisation example in the ASIO documentation, by this I mean I am compiling with the -shared and -fpic options to produce an .so file, which includes hooks/wrappers.
I'm running my shared library against another process and then my code gets run through the constructor function within the library (like DLLMain on Windows).
I know my code is being executed and it runs fine up until a certain point. Basically my problem involves trying to put ASIO and my networking code onto another thread. I'm using the following code to do that:
asio::io_service io_service;
server server(io_service, port);
asio::thread t(boost::bind(&asio::io_service::run, &io_service));
Now, as this code is run within a constructor function within the library, is throws a seg fault and I can't figure out why. If I replace it with:
asio::io_service io_service;
server server(io_service, port);
io_service.run();
The code runs 100% fine, except it steals the whole thread of execution and the hooked process won't run at all. Can anyone help me out here? I'm really confused.
Cheers

Answer 1

It looks like a lifetime issue.
If the following code is in a function within the library:
void some_function()
{
asio::io_service io_service;
server server(io_service, port);
asio::thread t(boost::bind(&asio::io_service::run, &io_service));
}
Then whenever the function returns, io_service will go out of scope, being destroyed while the newly spawned thread is trying to process the event loop. Consider changing it so that the lifetime of io_service and server extends to at least the duration of the thread:
void server_run()
{
asio::io_service io_service;
server server(io_service, port);
io_service.run();
}
...
asio::thread t(&server_run);