sysdeps/unix/sysv/linux/sched_setaffinity.c

   1 /* Copyright (C) 2002-2017 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sched.h>
  20 #include <string.h>
  21 #include <sysdep.h>
  22 #include <unistd.h>
  23 #include <sys/types.h>
  24 #include <shlib-compat.h>
  25
  26
  27 #ifdef __NR_sched_setaffinity
  28
  29 extern int __sched_setaffinity_new (pid_t, size_t, const cpu_set_t *);
  30 libc_hidden_proto (__sched_setaffinity_new)
  31
  32 int
  33 __sched_setaffinity_new (pid_t pid, size_t cpusetsize, const cpu_set_t *cpuset)
  34 {
  35   int result = INLINE_SYSCALL (sched_setaffinity, 3, pid, cpusetsize, cpuset);
  36
  37 #ifdef RESET_VGETCPU_CACHE
  38   if (result != -1)
  39     RESET_VGETCPU_CACHE ();
  40 #endif
  41
  42   return result;
  43 }
  44 libc_hidden_def (__sched_setaffinity_new)
  45 versioned_symbol (libc, __sched_setaffinity_new, sched_setaffinity,
  46                   GLIBC_2_3_4);
  47
  48
  49 # if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
  50 int
  51 attribute_compat_text_section
  52 __sched_setaffinity_old (pid_t pid, const cpu_set_t *cpuset)
  53 {
  54   /* The old interface by default assumed a 1024 processor bitmap.  */
  55   return __sched_setaffinity_new (pid, 128, cpuset);
  56 }
  57 compat_symbol (libc, __sched_setaffinity_old, sched_setaffinity, GLIBC_2_3_3);
  58 # endif
  59 #else
  60 # include <posix/sched_setaffinity.c>
  61 #endif