nptl/pthread_setconcurrency.c

   1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 <shlib-compat.h>
  22
  23 /* Global definition.  Needed in pthread_getconcurrency as well.  */
  24 int __concurrency_level;
  25
  26
  27 int
  28 __pthread_setconcurrency (int level)
  29 {
  30   if (level < 0)
  31     return EINVAL;
  32
  33   __concurrency_level = level;
  34
  35   /* XXX For ports which actually need to handle the concurrency level
  36      some more code is probably needed here.  */
  37
  38   return 0;
  39 }
  40 versioned_symbol (libc, __pthread_setconcurrency, pthread_setconcurrency,
  41                   GLIBC_2_34);
  42
  43 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34)
  44 compat_symbol (libpthread, __pthread_setconcurrency, pthread_setconcurrency,
  45                GLIBC_2_1);
  46 #endif