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Date: Mon, 03 Oct 2011 17:54:00 -0000
From: Andrew MacLeod <amacleod@redhat.com>
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To: Richard Henderson <rth@redhat.com>
CC: Lawrence Crowl <crowl@google.com>, Benjamin Kosnik <bkoz@redhat.com>,        Aldy Hernandez <aldyh@redhat.com>, GCC <gcc@gcc.gnu.org>
Subject: Re: C++11 atomic library notes
References: <4E862864.2010607@redhat.com> <4E89F171.4060808@redhat.com>
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On 10/03/2011 01:31 PM, Richard Henderson wrote:
> On 09/30/2011 01:36 PM, Andrew MacLeod wrote:
>> http://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary
>
>>    __atomic_store (size_t obj_size, T *mem, T val, enum memory_model model)
> I don't like this.  I really cannot imagine any situation for which the
> compiler can't resolve SIZE to a compile-time constant.  I think it's
> pointless to have a dispatch routine that just calls all of
>
its a library call for arbitrary sized objects...  C++ can have any 
class declared atomic, so it doesn't have to map to one of those 
optimized lock-free routines.


Andrew