nptl/pthread_mutexattr_setpshared.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 <futex-internal.h>
  21 #include <shlib-compat.h>
  22
  23 int
  24 __pthread_mutexattr_setpshared (pthread_mutexattr_t *attr, int pshared)
  25 {
  26   struct pthread_mutexattr *iattr;
  27
  28   int err = futex_supports_pshared (pshared);
  29   if (err != 0)
  30     return err;
  31
  32   iattr = (struct pthread_mutexattr *) attr;
  33
  34   if (pshared == PTHREAD_PROCESS_PRIVATE)
  35     iattr->mutexkind &= ~PTHREAD_MUTEXATTR_FLAG_PSHARED;
  36   else
  37     iattr->mutexkind |= PTHREAD_MUTEXATTR_FLAG_PSHARED;
  38
  39   return 0;
  40 }
  41 versioned_symbol (libc, __pthread_mutexattr_setpshared,
  42                   pthread_mutexattr_setpshared, GLIBC_2_34);
  43
  44 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_2, GLIBC_2_34)
  45 compat_symbol (libpthread, __pthread_mutexattr_setpshared,
  46                pthread_mutexattr_setpshared, GLIBC_2_2);
  47 #endif