From: Andrew MacLeod <amacleod@redhat.com>
To: Arnaud Charlet <charlet@adacore.com>
Cc: gcc-patches@gcc.gnu.org, Vincent Pucci <pucci@adacore.com>
Subject: Re: [Ada] Fix to 64-bit atomic operation failures on ppc-linux
Date: Tue, 17 Jul 2012 11:57:00 -0000 [thread overview]
Message-ID: <50055315.9070306@redhat.com> (raw)
In-Reply-To: <20120717101511.GA25996@adacore.com>
On 07/17/2012 06:15 AM, Arnaud Charlet wrote:
> This patch fixes failures due to the use of 64-bit atomic
> operations on ppc-linux. Undo of the previous patch for 64-bit atomic
> operations only.
>
> Note: this does NOT address the failure on ppc-darwin, which will be addressed
> by another patch soon.
>
> Tested on x86_64-pc-linux-gnu, committed on trunk
>
> 2012-07-17 Vincent Pucci <pucci@adacore.com>
>
> * s-atopri.adb (Lock_Free_Try_Write_X): Atomic_Compare_Exchange_X
> replaced by Sync_Compare_And_Swap_X.
> (Lock_Free_Try_Write_64): Removed.
> * s-atopri.ads (Sync_Compare_And_Swap_X): Replaces previous
> routine Atomic_Compare_Exchange_X.
> (Lock_Free_Read_64): Renaming of Atomic_Load_64.
> (Lock_Free_Try_Write_64): Renaming of Sync_Compare_And_Swap_64.
>
What is the nature of the atomic failures using the
__atomic_compare_exchange built-in? Does it have anything to do with
the expected value being returned by pointer?
Andrew
next prev parent reply other threads:[~2012-07-17 11:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-17 10:15 Arnaud Charlet
2012-07-17 11:57 ` Andrew MacLeod [this message]
2012-07-17 15:57 ` Richard Henderson
2012-07-17 15:59 ` Andrew MacLeod
2012-07-17 15:55 ` Richard Henderson
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