[ILUG] sched_setaffinity interface change

[Dave Airlie]

At a guess the old interfaces are broken with new kernels and may not work
in old kernels... you might be better of using the kernel syscall directly
if it isn't a big deal..

Dave.

On Thu, 4 Nov 2004 P at draigBrady.com wrote:

> As can be seen here:
> http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/posix/sched.h?cvsroot=glibc
> the sched_setaffinity() interface has changed 3 times:
>
> rh9 = glibc-2.3.2 = int sched_setaffinity(__pid_t __pid, unsigned int __len,
> unsigned long int *__mask);
> fc1 = glibc-2.3.3 = int sched_setaffinity(__pid_t __pid, __const cpu_set_t
> *__mask);
> fc2 = glibc-cvs   = int sched_setaffinity(__pid_t __pid, size_t __cpusetsize,
> __const cpu_set_t *__cpuset);
>
> Now I would like to write code that can handle all of these
> and was wondering whether I could use conditional
> compilation, rather than a configure script.
>
> What I've come up with so far is:
>
> #ifdef CPU_SET
>     //use glibc-2.3.2 interface
> #else
>     //any clever way to select between the last 2?
> #endif
>
> Please don't say I need a configure script to get
> a program to compile on both fc1 and fc2?
>
> thanks,
> Pádraig.
>

-- 
David Airlie, Software Engineer
http://www.skynet.ie/~airlied / airlied at skynet.ie
pam_smb / Linux DECstation / Linux VAX / ILUG person