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From: Hei Chan <structurechart@yahoo.com>
To: "gcc-help@gcc.gnu.org" <gcc-help@gcc.gnu.org>
Subject: __sync_bool_compare_and_swap() With a Pointer
Date: Mon, 19 Nov 2012 05:10:00 -0000	[thread overview]
Message-ID: <1353301824.76156.YahooMailNeo@web165005.mail.bf1.yahoo.com> (raw)

Hi,

According to http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html, __sync_bool_compare_and_swap() supports int, long, long long, and their unsigned counterparts, and GCC will allow any integral scalar or pointer type that is 1, 2, 4 or 8 bytes in length.

I wonder in what situation the pointer type won't be 1, 2, 4 or 8 bytes in length.  Let's say I am running on a 64-bit Intel CPU.


Thanks in advance.


Cheers,
Hei

             reply	other threads:[~2012-11-19  5:10 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-11-19  5:10 Hei Chan [this message]
2012-11-19  5:42 ` Ian Lance Taylor

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