1 /* Get priority ceiling setting from 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 <pthreadP.h> 21 22 23 int pthread_mutexattr_getprioceiling(const pthread_mutexattr_t * attr,int * prioceiling)24pthread_mutexattr_getprioceiling ( 25 const pthread_mutexattr_t *attr, 26 int *prioceiling) 27 { 28 const struct pthread_mutexattr *iattr; 29 int ceiling; 30 31 iattr = (const struct pthread_mutexattr *) attr; 32 33 ceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK) 34 >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT); 35 36 if (! ceiling) 37 { 38 if (__sched_fifo_min_prio == -1) 39 __init_sched_fifo_prio (); 40 if (ceiling < __sched_fifo_min_prio) 41 ceiling = __sched_fifo_min_prio; 42 } 43 44 *prioceiling = ceiling; 45 46 return 0; 47 } 48