1 /* Change priority protocol setting in pthread_mutexattr_t.
2 Copyright (C) 2006-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
25 pthread_mutexattr_setprotocol (pthread_mutexattr_t
*attr
, int protocol
)
27 if (protocol
!= PTHREAD_PRIO_NONE
28 && protocol
!= PTHREAD_PRIO_INHERIT
29 && __builtin_expect (protocol
!= PTHREAD_PRIO_PROTECT
, 0))
32 struct pthread_mutexattr
*iattr
= (struct pthread_mutexattr
*) attr
;
34 iattr
->mutexkind
= ((iattr
->mutexkind
& ~PTHREAD_MUTEXATTR_PROTOCOL_MASK
)
35 | (protocol
<< PTHREAD_MUTEXATTR_PROTOCOL_SHIFT
));