Path: utzoo!mnetor!uunet!husc6!bloom-beacon!gatech!mcnc!rti!xyzzy!throopw
From: throopw@xyzzy.UUCP (Wayne A. Throop)
Newsgroups: comp.lang.c
Subject: Re: Optimization, volatile (was Re: volatile)
Message-ID: <839@xyzzy.UUCP>
Date: 6 May 88 15:02:31 GMT
References: <13074@brl-adm.ARPA> <2003@rtech.UUCP> <503@wsccs.UUCP> <536@sol.warwick.ac.uk>
Organization: Data General, RTP NC.
Lines: 30

> cudcv@daisy.warwick.ac.uk (Rob McMahon)
>> terry@wsccs.UUCP (Every system needs one)
>> [...doing things like "volatile" is...] why #pragma was invented.
> It's been said before, but some people seem to have missed it ... how do
> you use #pragma to specify all of:
> 	volatile int *p;
> 	int *volatile p;
> 	volatile int *volatile p;

I've made this reply before, but some people seem to have missed it...
you do it like so:

                using keywords:            using pragmas:

  int is        volatile int *p;           int *p;
  volatile                                 #pragma volatile *p

  pointer is    int *volatile p;           int *p;
  volatile                                 #pragma volatile p

  both are      volatile int *volatile p;  int *p;
  volatile                                 #pragma volatile p, *p


"It works for me."

--
He wonders if he too might have made a similar mistake.
        --- "Seen and Not Seen" by Talking Heads from "Remain in Light"
-- 
Wayne Throop      <the-known-world>!mcnc!rti!xyzzy!throopw