nptl/pthread_rwlockattr_setkind_np.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 int
  23 __pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref)
  24 {
  25   struct pthread_rwlockattr *iattr;
  26
  27   if (pref != PTHREAD_RWLOCK_PREFER_READER_NP
  28       && pref != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP
  29       && __builtin_expect  (pref != PTHREAD_RWLOCK_PREFER_WRITER_NP, 0))
  30     return EINVAL;
  31
  32   iattr = (struct pthread_rwlockattr *) attr;
  33
  34   iattr->lockkind = pref;
  35
  36   return 0;
  37 }
  38 versioned_symbol (libc, __pthread_rwlockattr_setkind_np,
  39                   pthread_rwlockattr_setkind_np, GLIBC_2_34);
  40
  41 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_1, GLIBC_2_34)
  42 compat_symbol (libpthread, __pthread_rwlockattr_setkind_np,
  43                pthread_rwlockattr_setkind_np, GLIBC_2_1);
  44 #endif