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From: ftw@datacube.UUCP
Newsgroups: comp.lang.c
Subject: Re: volatile question
Message-ID: <102600002@datacube>
Date: Wed, 29-Apr-87 11:12:00 EDT
Article-I.D.: datacube.102600002
Posted: Wed Apr 29 11:12:00 1987
Date-Received: Fri, 1-May-87 04:27:49 EDT
References: <7125@brl-adm.ARPA>
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Nf-ID: #R:brl-adm.ARPA:-712500:datacube:102600002:000:535
Nf-From: datacube.UUCP!ftw    Apr 29 11:12:00 1987


I believe the following should work:

    volatile char *ptr_to_volatile;  /* variable pointer to a volatile char */
    char *volatile volatile_ptr;     /* volatile pointer to a variable char */

The former tells the compiler not to do anything silly (optimize) with the
object pointed at, and the latter instructs the compiler to not optimize
any usage of the pointer.

This also is applicable to the "const" keyword; the above code example is my
paraphrasing of the October '86 draft standard.


			Farrell Woods,
			Datacube, Inc.