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Date: Sat, 30 Nov 2002 10:32:31 -0800
From: Andy Chou <acc@CS.Stanford.EDU>
To: caml-list@inria.fr
Subject: [Caml-list] signals and exceptions
Message-ID: <20021130183231.GA20600@Xenon.stanford.edu>
Reply-To: acc@CS.Stanford.EDU
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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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