Hello.  

I need to implement the following function in C/C++ on a multiprocessor SGI.

int CAS(int *x,int old,int newv)
{
   // ... 
}

Ideally, this would be a one-line call to the compare_and_swap_int
function found in sys/atomic_ops.h, but at the top of that file the
following line:

#if _KERNEL && !_STANDALONE && !LANGUAGE_ASSEMBLY

And I'm not compiling the kernel.  :)

This could be done using the li and sc MIPS assembly instructions.

Thanks in advance.

William