| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 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, write to the Free |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | 02111-1307 USA. */ |
| 20 | |
| 21 | #include <pthreadP.h> |
| 22 | |
| 23 | |
| 24 | int |
| 25 | pthread_mutexattr_getprioceiling ( |
| 26 | const pthread_mutexattr_t *attr, |
| 27 | int *prioceiling) |
| 28 | { |
| 29 | const struct pthread_mutexattr *iattr; |
| 30 | int ceiling; |
| 31 | |
| 32 | iattr = (const struct pthread_mutexattr *) attr; |
| 33 | |
| 34 | ceiling = ((iattr->mutexkind & PTHREAD_MUTEXATTR_PRIO_CEILING_MASK) |
| 35 | >> PTHREAD_MUTEXATTR_PRIO_CEILING_SHIFT); |
| 36 | |
| 37 | if (! ceiling) |
| 38 | { |
| 39 | if (__sched_fifo_min_prio == -1) |
| 40 | __init_sched_fifo_prio (); |
| 41 | if (ceiling < __sched_fifo_min_prio) |
| 42 | ceiling = __sched_fifo_min_prio; |
| 43 | } |
| 44 | |
| 45 | *prioceiling = ceiling; |
| 46 | |
| 47 | return 0; |
| 48 | } |