Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!rutgers!usc!wuarchive!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!news.funet.fi!hydra!kreeta!wirzeniu
From: wirzeniu@cs.Helsinki.FI (Lars Wirzenius)
Newsgroups: comp.lang.c
Subject: Re: TURBO C: signal(SIGINT, ); DOS calls ok from this handler.
Message-ID: <10249@hydra.Helsinki.FI>
Date: 3 Jan 91 17:34:18 GMT
References: <15795.2780a5d4@levels.sait.edu.au> <10229@hydra.Helsinki.FI> <1991Jan03.113611.4796@ecst.csuchico.edu>
Sender: news@cs.Helsinki.FI
Organization: University of Helsinki, Department of Computer Science
Lines: 14

In article <1991Jan03.113611.4796@ecst.csuchico.edu> madams@ecst.csuchico.edu (Michael E. Adams) writes:
>Your a little off base here.  DOS reentrance is not a problem when
>servicing int 23h.   The default handler from signal(SIGINT, func);

I wasn't talking about that, however.  The C library itself (printf
being the particular case) need not be reentrant: it might use static
data structures etc.  This has nothing to do with MS-DOS specifically,
it's just as true for UNIX and other environments with implementations
of the C language. 

I have been unable to recreate the problem with the program crashing
after about 25 interruptions. Maybe the problem lies elsewhere after all?

Lars Wirzenius    wirzeniu@cs.helsinki.fi    wirzenius@cc.helsinki.fi