Re: Re: [linux-sh:03198] Atomic operations from user-space?

On Fri, Apr 02, 2004 at 06:55:52PM +0100, Alex Bennee wrote:
> Thanks. I've got them on my cross-compiled libs. However having looked
> at them I can't see any magic. For example:
> 
> static inline void
> __attribute__ ((__unused__))
> __atomic_add (_Atomic_word* __mem, int __val)
> {
>   *__mem += __val;
> }
> 
> Doesn't seem to do anything to guarantee atomicity unless it is assumed
> the code compiles to a single instruction. Unless I'm missing some magic
> somewhere?
> 
What you probably want is the gUSA patches for glibc. See:

	http://sources.redhat.com/ml/libc-hacker/2002-05/msg00029.html

the kernel side of gUSA support is in place already, so you don't need to do
anything special for that.

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