Subject: Re: [boost] Boost.Process 0.5 released
From: Boris Schaeling (boris_at_[hidden])
Date: 2012-08-21 18:35:52
On Sun, 19 Aug 2012 23:21:00 +0200, Oliver Kowalke <oliver.kowalke_at_[hidden]>
wrote:
Hi Oliver,
> How is asynch. signal handling done?
>
> int status; boost::asio::signal_set set(io_service, SIGCHLD);
> set.async_wait( [&status](const boost::system::error_code&, int) {
> ::wait(&status); } );
>
> Please note that on POSIX you are limited on what you can do inside a
> signal handler (must not call non-reentrant functions)!
> I suggest you do not invoke the callback from the user in the signal
> handler - instead you set inside the signal handler a flag indicating
> the io-demultiplexer (io_service) to call the associated callback if you
> have returned from the signal handler (io_service has to continue with
> dispatching).
I'm not sure whether I understand. Is this a general recommendation for
others? Or you think there is something wrong with the code from the
example?
Boris