pthread_attr_setscope fails

[Enrique Perez-Terron]

On Thu, 2004-08-26 at 10:02, Sebastien Decugis wrote:
> Hi all,
> 
> It seems that pthread_attr_setscope(&ta, PTHREAD_SCOPE_PROCESS); fails
> with the error "Operation not supported" whereas
> sysconf(_SC_THREAD_PRIORITY_SCHEDULING); returns 200112 (The Thread
> Execution Scheduling option is supported).
> 
> It this a normal behavior?

   # cat scope.c
   #include <unistd.h>
   int main(int argc, char *argv[], char *envp[])
   {
     long result = sysconf(_SC_THREAD_PRIORITY_SCHEDULING);
     if (result == 1)
       perror("sysconf");
     else
       printf("Treadh priority scheduling %d\n",result);
     return 0;
   }
   # gcc -o scope scope.c
   # ./scope
   sysconf: Success
   # uname -s -r -m
   Linux 2.6.6-1.435.2.3 i586
   # /lib/libc.so.6
   GNU C Library stable release version 2.3.3, by Roland McGrath et al.
   ...
   Compiled by GNU CC version 3.3.3 20040412 (Red Hat Linux 3.3.3-7).
   Compiled on a Linux 2.4.20 system on 2004-05-11.
   Available extensions:
        GNU libio by Per Bothner
        crypt add-on version 2.1 by Michael Glad and others
        linuxthreads-0.10 by Xavier Leroy
        The C stubs add-on version 2.1.2.
        BIND-8.2.3-T5B
        NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
        Glibc-2.0 compatibility add-on by Cristian Gafton
        GNU Libidn by Simon Josefsson
        libthread_db work sponsored by Alpha Processor Inc

-Enrique