nptl/pthread_mutexattr_getprotocol.c

   1 /* Get priority protocol setting from pthread_mutexattr_t.
   2    Copyright (C) 2006-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 <pthreadP.h>
  20 #include <shlib-compat.h>
  21
  22 int
  23 __pthread_mutexattr_getprotocol (const pthread_mutexattr_t *attr, int *protocol)
  24 {
  25   const struct pthread_mutexattr *iattr;
  26
  27   iattr = (const struct pthread_mutexattr *) attr;
  28
  29   *protocol = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PROTOCOL_MASK)
  30                >> PTHREAD_MUTEXATTR_PROTOCOL_SHIFT);
  31
  32   return 0;
  33 }
  34 versioned_symbol (libc, __pthread_mutexattr_getprotocol,
  35                   pthread_mutexattr_getprotocol, GLIBC_2_34);
  36
  37 #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_4, GLIBC_2_34)
  38 compat_symbol (libpthread, __pthread_mutexattr_getprotocol,
  39                pthread_mutexattr_getprotocol, GLIBC_2_4);
  40 #endif