我的提升线程不会中断

Question

我有一个应用程序，它有一个io_service和一个用于监视的服务器，所以我在不同的线程上启动了两件事：

int main(int argc, char** argv)
{
    //...
    sigset_t new_mask;
    sigfillset(&new_mask);
    sigset_t old_mask;
    pthread_sigmask(SIG_BLOCK, &new_mask, &old_mask);

    boost::asio::io_service io_service;
    BasicIOObject< BasicIOService< > > myio(io_service);

    // Register signal handlers so that the daemon may be shut down. You may
    // also want to register for other signals, such as SIGHUP to trigger a
    // re-read of a configuration file.
    boost::asio::signal_set signals(io_service, SIGINT, SIGTERM);
    signals.async_wait(boost::bind(&boost::asio::io_service::stop, &io_service));

    blur.async_wait(boost::bind(&BasicIOObject<BasicIOService<>>::wait_handler, boost::ref(myio), boost_ph::error));

    http::server::Server s("localhost", "5000");

    // The io_service can now be used normally.
    boost::thread t(boost::bind(&http::server::Server::run, &s));
    boost::thread t2(boost::bind(&boost::asio::io_service::run, &io_service));

    t2.interrupt();
    t.interrupt();

    // Restore previous signals.
    pthread_sigmask(SIG_SETMASK, &old_mask, 0);

    // Wait for signal indicating time to shut down.
    sigset_t wait_mask;
    sigemptyset(&wait_mask);
    sigaddset(&wait_mask, SIGINT);
    sigaddset(&wait_mask, SIGQUIT);
    sigaddset(&wait_mask, SIGTERM);
    pthread_sigmask(SIG_BLOCK, &wait_mask, 0);
    int sig = 0;
    sigwait(&wait_mask, &sig);

    // Stop the server.
    s.stop();
    // Stop service
    io_service.stop();
    t.join();
    t2.join();
}

服务器基于boost example

我在io_service的代码的某些部分添加了：

    boost::this_thread::interruption_point();

    if (boost::this_thread::interruption_enabled())
        std::cout << "Interruption enabled" << std::endl;
    else
        std::cout << "Interruption disabled" << std::endl;

    if (boost::this_thread::interruption_requested())
        std::cout << "Requested interruption true" << std::endl;
    else
        std::cout << "Requested interruption false" << std::endl;

没有发生中断。控制台写的更多

Interruption enabled
Requested interruption false

我做错了什么？为什么它不会中断线程？