nptl/pthread_setconcurrency.c

   1 /* Copyright (C) 2002-2022 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 <shlib-compat.h>
  21
  22 /* Global definition.  Needed in pthread_getconcurrency as well.  */
  23 int __concurrency_level;
  24
  25
  26 int
  27 __pthread_setconcurrency (int level)
  28 {
  29   if (level < 0)
  30     return EINVAL;
  31
  32   __concurrency_level = level;
  33
  34   /* XXX For ports which actually need to handle the concurrency level
  35      some more code is probably needed here.  */
  36
  37   return 0;
  38 }
  39 versioned_symbol (libc, __pthread_setconcurrency, pthread_setconcurrency,
  40                   GLIBC_2_34);
  41
  42 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34)
  43 compat_symbol (libpthread, __pthread_setconcurrency, pthread_setconcurrency,
  44                GLIBC_2_1);
  45 #endif