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. 5 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. 10 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. 15 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 <http://www.gnu.org/licenses/>. */ 19 20 #include <errno.h> 21 #include <pthreadP.h> 22 23 24 int pthread_mutexattr_setprotocol(pthread_mutexattr_t * attr,int protocol)25pthread_mutexattr_setprotocol ( 26 pthread_mutexattr_t *attr, 27 int protocol) 28 { 29 if (protocol != PTHREAD_PRIO_NONE 30 && protocol != PTHREAD_PRIO_INHERIT 31 && __builtin_expect (protocol != PTHREAD_PRIO_PROTECT, 0)) 32 return EINVAL; 33 34 struct pthread_mutexattr *iattr = (struct pthread_mutexattr *) attr; 35 36 iattr->mutexkind = ((iattr->mutexkind & ~PTHREAD_MUTEXATTR_PROTOCOL_MASK) 37 | (protocol << PTHREAD_MUTEXATTR_PROTOCOL_SHIFT)); 38 39 return 0; 40 } 41