[haiku-gsoc] Re: [HCD]: Bfs bug #1
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-gsoc@xxxxxxxxxxxxx
- Date: Wed, 18 Jun 2008 14:52:26 +0200
On 2008-06-18 at 13:34:23 [+0200], Salvatore Benedetto <emitrax@xxxxxxxxx>
wrote:
>
> in src/add-ons/kernel/partitioning_systems/intel/intel.cpp
> // TODO: This doesn't belong here!
> // no atomic_add() in the boot loader
> #ifdef _BOOT_MODE
>
> inline int32
> atomic_add(int32 *a, int32 num)
> {
> int32 oldA = *a;
> *a += num;
> return oldA;
> }
>
> #endif
As the comment says it is only for the boot loader. Since it is
single-threaded, there's little need for atomicity. The atomic_*() functions
used in the kernel and userland live in
src/system/libroot/os/arch/*/atomic.S. For more info:
http://www.haiku-os.org/legacy-docs/bebook/TheSupportKit_Functions.html
CU, Ingo
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