Sender:	"Rolf Campbell" <moscoop AT nortelnetworks DOT com>
Message-ID:	<38A32674.A12A521E@americasm01.nt.com>
Date:	Thu, 10 Feb 2000 15:58:28 -0500
From:	"Rolf Campbell" <moscoop AT nortelnetworks DOT com>
Organization:	Nortel Networks
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Newsgroups:	comp.os.msdos.djgpp
To:	djgpp AT delorie DOT com
Subject:	Re: How Do I start another DOS program from DJGPP ?
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 1000210174053 DOT 29921A-100000 AT is>
Reply-To:	djgpp AT delorie DOT com

Eli Zaretskii wrote:

> > int_handler
> > {
> > read_last_string_from_file("tempfile.txt");
> > process_that_string_quickly_since_we_are_in_an_interrupt;
> > }
>
> That won't work (or, rather, will crash your system): you cannot safely
> make DOS calls from a hardware interrupt handler, and reading from a file
> requires a DOS call.

    But isn't the DJGPP timer interrupt really delayed until data is
acessed, and then called from the page-fault handler?  Does a page-fault
handler have that limitation? (no interrupt calls)


--
(\/) Rolf Campbell (\/)

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