Groups > comp.programming.threads > #1781

Re: forcing the compiler to reload from memory with c++0x

Path	csiph.com!eeepc.pasdenom.info!news.pasdenom.info!news.dougwise.org!aioe.org!eternal-september.org!feeder.eternal-september.org!.POSTED!not-for-mail
From	Alexander Terekhov <terekhov@web.de>
Newsgroups	comp.programming.threads
Subject	Re: forcing the compiler to reload from memory with c++0x
Date	Tue, 01 Feb 2011 14:17:52 +0100
Organization	A noiseless patient Spider
Lines	29
Message-ID	<4D480800.1C5132D7@web.de> (permalink)
References	<4d3cee42$0$1209$426a74cc@news.free.fr> <1d21ad0a-db55-460e-aeb6-66f6d19369ea@i13g2000yqe.googlegroups.com> <4d3e2e3f$0$21517$426a34cc@news.free.fr> <4D40A4C7.16E6F9AE@web.de> <69d82db7-34be-4de7-86c4-2f39cc1e6df3@m13g2000yqb.googlegroups.com> <4d4221e9$0$17247$426a74cc@news.free.fr> <947b33d5-2509-4f0c-9256-a7c3de35578e@24g2000yqa.googlegroups.com> <87mxmlxxry.fsf@justsoftwaresolutions.co.uk> <ihv8t6$bmr$1@news.eternal-september.org> <87oc6yxdcw.fsf@justsoftwaresolutions.co.uk> <ii745u$5q3$1@news.eternal-september.org> <87sjw8w4b5.fsf@justsoftwaresolutions.co.uk>
Reply-To	terekhov@web.de
Mime-Version	1.0
Content-Type	text/plain; charset=us-ascii
Content-Transfer-Encoding	7bit
Injection-Info	mx01.eternal-september.org; posting-host="3e4Fotn8NP3CUoQPJwS9VQ"; logging-data="16696"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+t6LZ9RkB9gs0Lm0Gh4saRMzrNIsrsuBs="
X-Mailer	Mozilla 4.77 [en] (Windows NT 5.0; U)
X-Accept-Language	en
Cancel-Lock	sha1:kN00gOkeCMiKAQnQJf24nPbT5Z8=
Xref	csiph.com comp.programming.threads:1781

Show key headers only | View raw

Anthony Williams wrote:
[...]
> You can of course make your atomic variables volatile too, and then they
> DO become observable behaviour.

Observable as in what? Memory mapped I/O variables and signal handlers
aside, you can't mean debuggers and/or asm listings. The following
programs

int main() {
  volatile int i;
  // volatile write = has no observable effect
  i = 1;
  // volatile read = has no observable effect
  int n = i;
  // output: 1
  std::cout << n;
}

int main() {
  // output: 1
  std::cout << 1;
}

can be translated into the same executable code.

regards,
alexander.

Back to comp.programming.threads | Previous | Next — Next in thread | Find similar

Thread

Re: forcing the compiler to reload from memory with c++0x Alexander Terekhov <terekhov@web.de> - 2011-02-01 14:17 +0100
  Re: forcing the compiler to reload from memory with c++0x Alexander Terekhov <terekhov@web.de> - 2011-02-02 14:45 +0100
    Re: forcing the compiler to reload from memory with c++0x Dmitriy Vyukov <dvyukov@gmail.com> - 2011-02-02 07:02 -0800
      Re: forcing the compiler to reload from memory with c++0x Alexander Terekhov <terekhov@web.de> - 2011-02-02 16:33 +0100
  Re: forcing the compiler to reload from memory with c++0x Alexander Terekhov <terekhov@web.de> - 2011-02-01 16:32 +0100
    Re: forcing the compiler to reload from memory with c++0x Alexander Terekhov <terekhov@web.de> - 2011-02-02 12:13 +0100
      Re: forcing the compiler to reload from memory with c++0x Dmitriy Vyukov <dvyukov@gmail.com> - 2011-02-02 04:54 -0800
    Re: forcing the compiler to reload from memory with c++0x Dmitriy Vyukov <dvyukov@gmail.com> - 2011-02-01 21:02 -0800
    Re: forcing the compiler to reload from memory with c++0x Joshua Maurice <joshuamaurice@gmail.com> - 2011-02-01 15:19 -0800
  Re: forcing the compiler to reload from memory with c++0x Anthony Williams <anthony.ajw@gmail.com> - 2011-02-01 13:51 +0000

csiph-web