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[glibc/history.git] / nptl / pthread_mutexattr_setprotocol.c
blob191231244e7f5076d044d4c921bbc38703dde7f6
1 /* Change priority protocol setting in pthread_mutexattr_t.
2 Copyright (C) 2006 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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
21 #include <errno.h>
22 #include <pthreadP.h>
25 int
26 pthread_mutexattr_setprotocol (attr, protocol)
27 pthread_mutexattr_t *attr;
28 int protocol;
30 if (protocol != PTHREAD_PRIO_NONE
31 && protocol != PTHREAD_PRIO_INHERIT
32 && __builtin_expect (protocol != PTHREAD_PRIO_PROTECT, 0))
33 return EINVAL;
35 struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr;
37 iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PROTOCOL_MASK)
38 | (protocol << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT));
40 return 0;