nptl/pthread_setaffinity.c

   1 /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <pthreadP.h>
  20 #include <sysdep.h>
  21 #include <sys/types.h>
  22 #include <shlib-compat.h>
  23
  24
  25 int
  26 __pthread_setaffinity_new (pthread_t th, size_t cpusetsize,
  27                            const cpu_set_t *cpuset)
  28 {
  29   const struct pthread *pd = (const struct pthread *) th;
  30   int res;
  31
  32   res = INTERNAL_SYSCALL_CALL (sched_setaffinity, pd->tid, cpusetsize,
  33                                cpuset);
  34
  35   return (INTERNAL_SYSCALL_ERROR_P (res)
  36           ? INTERNAL_SYSCALL_ERRNO (res)
  37           : 0);
  38 }
  39 versioned_symbol (libc, __pthread_setaffinity_new,
  40                   pthread_setaffinity_np, GLIBC_2_34);
  41
  42 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_3_4, GLIBC_2_34)
  43 compat_symbol (libpthread, __pthread_setaffinity_new,
  44                pthread_setaffinity_np, GLIBC_2_3_4);
  45 #endif
  46
  47 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_3_4)
  48 int
  49 __pthread_setaffinity_old (pthread_t th, cpu_set_t *cpuset)
  50 {
  51   /* The old interface by default assumed a 1024 processor bitmap.  */
  52   return __pthread_setaffinity_new (th, 128, cpuset);
  53 }
  54 compat_symbol (libpthread, __pthread_setaffinity_old, pthread_setaffinity_np,
  55                GLIBC_2_3_3);
  56 #endif