[Caml-list] signals and exceptions

[Caml-list] signals and exceptions

[Andy Chou]

Can I safely throw an exception inside a signal handler, for the purposes 
of timeout?  For example:

exception Timeout

Sys.set_signal Sys.sigalrm (Sys.Signal_handle (fun _ -> raise Timeout));
    (try
       ignore(Unix.alarm 5);
       work();
       if Unix.alarm 0 == 0 then
         Unix.pause()
     with Timeout -> printf "TIMEOUT\n");
Sys.set_signal Sys.sigalrm Sys.Signal_ignore;

Will there be an GC problems, etc?  I've noticed that a program that uses
this idiom non-deterministically seg faults.

-Andy
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Re: [Caml-list] signals and exceptions

[Alan Schmitt]

* Andy Chou (acc@CS.Stanford.EDU) wrote:
> Can I safely throw an exception inside a signal handler, for the purposes 
> of timeout?  

I think so ... I've been doing it in a program for some time and I never
had a segfault.

Alan


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