who's handling the memory barriers - do all the __sync_* functions
perform an internal memory barrier operation (on the CPU _and_ on the
compiler)?
--guy
Raz wrote:
Do not use inline kernel atomic_t operation, you will violate GPL.
Use gcc builtins. If you want information please refer to:
http://sos-linux.svn.sourceforge.net/viewvc/sos-linux/offsched/Linux-Debug/
and download linux-debug.pdf . You will few words on atomicity in user
space in linux.
Please execuse for bad editing, the paper is not complete.
raz
On Wed, Dec 9, 2009 at 6:45 PM, Gilboa Davara <gilb...@gmail.com
<mailto:gilb...@gmail.com>> wrote:
On Wed, 2009-12-09 at 18:22 +0200, Erez D wrote:
> hi
>
> hi do i do atomic operations in linux (userspace) ?
>
> i need somthing like testAndSet32()
>
>
> thanks,
> erez.
You could access the kernel's atomic in-line function from user-space.
(under /usr/src/linux/arch...)
You'll have to include half kernel to satisfy missing symbols - but it's
doable. (At least it worked, last time I tried.)
Oh, I remember alsa (-devel) having a copy of these headers in a
user-mode digest-able form. Not sure though.
- Gilboa
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