Boost ASIO: recovering from handler exceptions

问题

If an ASIO callback throws an error is it safe to resume the async processing?

In short, does the following code have any merit?

void runAsioLoop()
{
    boost::asio::io_service::work work(this->m_ioService);
    boost::system::error_code unused;

    while (m_running) {
        try {
            this->m_ioService.run(unused);
            this->m_ioService.reset();
        } catch (...) {
            std::cerr << "*** An error happened\n";
        }
    }
}

回答1:

It should work, but the better idiom is:

for (;;) {
    try {
        svc.run();
        break; // exited normally
    } catch (std::exception const &e) {
        logger.log(LOG_ERR) << "[eventloop] An unexpected error occurred running a task: " << e.what();
    } catch (...) {
        logger.log(LOG_ERR) << "[eventloop] An unexpected error occurred running a task";
    }
}

Here's the documentation for it: http://www.boost.org/doc/libs/1_65_1/doc/html/boost_asio/reference/io_service.html#boost_asio.reference.io_service.effect_of_exceptions_thrown_from_handlers

来源：https://stackoverflow.com/questions/46934078/boost-asio-recovering-from-handler-exceptions