Re: [boost] [threads / signals2] Win events replace by boost signals (threadsafe)

On Monday, March 23, 2015 04:55 PM, Fu ji wrote:

Hello,

I have to change win32 events with something portable so I decided to use boost.signals2.

Right now I have something like:

ret = WaitForMultipleObjets{ switch(ret) { case Timeout: something; break; case Event1: something; break; case Event2: something; break; }}

and I think that the good idea is to replace this with something like that:

for(;;){ Execute code from timeout, if event occurs interrupt and execute code which is responsible for event handling}

but for test I write this:

boost::signals2::signal signal;

void SendSignal() { std::cout << "Send signal"; boost::this_thread::sleep_for(boost::chrono::milliseconds(200)); signal(); boost::this_thread::sleep_for(boost::chrono::milliseconds(2000)); }

int main() { boost::thread t1(SendSignal);

for (;;) { std::cout << "."; boost::this_thread::sleep_for(boost::chrono::milliseconds(100)); }

auto c = signal.connect([]() { std::cout << "Signal receive" << std::endl; boost::this_thread::sleep_for(boost::chrono::milliseconds(1000)); });

return 0;

At this point the thread detaches and the process exits: http://www.boost.org/doc/libs/1_57_0/doc/html/thread/thread_management.html#... You need to call t1.join() before exiting this scope. For exception safety, you'll probably want to use RAII so that the thread is joined on the destruction of a scoped object. Have a look at: http://www.boost.org/doc/libs/1_57_0/doc/html/thread/ScopedThreads.html#thre...

}

unfortunately this example is not working, what I've done wrong ?

Best regards

Ben