nptl/pthread_setaffinity.c

   1 /* Copyright (C) 2003-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthreadP.h>
  21 #include <sysdep.h>
  22 #include <sys/types.h>
  23 #include <shlib-compat.h>
  24
  25
  26 int
  27 __pthread_setaffinity_new (pthread_t th, size_t cpusetsize,
  28                            const cpu_set_t *cpuset)
  29 {
  30   const struct pthread *pd = (const struct pthread *) th;
  31   int res;
  32
  33   res = INTERNAL_SYSCALL_CALL (sched_setaffinity, pd->tid, cpusetsize,
  34                                cpuset);
  35
  36   return (INTERNAL_SYSCALL_ERROR_P (res)
  37           ? INTERNAL_SYSCALL_ERRNO (res)
  38           : 0);
  39 }
  40 versioned_symbol (libpthread, __pthread_setaffinity_new,
  41                   pthread_setaffinity_np, GLIBC_2_3_4);
  42
  43
  44 #if SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
  45 int
  46 __pthread_setaffinity_old (pthread_t th, cpu_set_t *cpuset)
  47 {
  48   /* The old interface by default assumed a 1024 processor bitmap.  */
  49   return __pthread_setaffinity_new (th, 128, cpuset);
  50 }
  51 compat_symbol (libpthread, __pthread_setaffinity_old, pthread_setaffinity_np,
  52                GLIBC_2_3_3);
  53 #endif