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Re: C++0x Memory model and gcc

From: Mark Mitchell <mark at codesourcery dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: Andrew MacLeod <amacleod at redhat dot com>, GCC <gcc at gcc dot gnu dot org>
Date: Fri, 07 May 2010 06:55:10 -0700
Subject: Re: C++0x Memory model and gcc
References: <4BE2E39A.5060706@redhat.com> <mcrtyqkwyqo.fsf@dhcp-172-17-9-151.mtv.corp.google.com>

Ian Lance Taylor wrote:

>     -fmemory-model=single
>         Assume single threaded execution, which also means no signal
>         handlers.
>     -fmemory-model=fast
>         The user is responsible for all synchronization.  Accessing
>         the same memory words from different threads may break
>         unpredictably.
>     -fmemory-model=safe
>         The compiler will do its best to protect you.

That makes sense to me.  I think that's an appropriately user-oriented
view of the choices.

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713

References:
- C++0x Memory model and gcc
  - From: Andrew MacLeod
- Re: C++0x Memory model and gcc
  - From: Ian Lance Taylor

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