| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <errno.h> |
| 20 | #include <sched.h> |
| 21 | #include <string.h> |
| 22 | #include "pthreadP.h" |
| 23 | #include <lowlevellock.h> |
| 24 | |
| 25 | |
| 26 | int |
| 27 | __pthread_setschedparam (threadid, policy, param) |
| 28 | pthread_t threadid; |
| 29 | int policy; |
| 30 | const struct sched_param *param; |
| 31 | { |
| 32 | struct pthread *pd = (struct pthread *) threadid; |
| 33 | |
| 34 | /* Make sure the descriptor is valid. */ |
| 35 | if (INVALID_TD_P (pd)) |
| 36 | /* Not a valid thread handle. */ |
| 37 | return ESRCH; |
| 38 | |
| 39 | int result = 0; |
| 40 | |
| 41 | lll_lock (pd->lock, LLL_PRIVATE); |
| 42 | |
| 43 | struct sched_param p; |
| 44 | const struct sched_param *orig_param = param; |
| 45 | |
| 46 | /* If the thread should have higher priority because of some |
| 47 | PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */ |
| 48 | if (__builtin_expect (pd->tpp != NULL, 0) |
| 49 | && pd->tpp->priomax > param->sched_priority) |
| 50 | { |
| 51 | p = *param; |
| 52 | p.sched_priority = pd->tpp->priomax; |
| 53 | param = &p; |
| 54 | } |
| 55 | |
| 56 | /* Try to set the scheduler information. */ |
| 57 | if (__builtin_expect (__sched_setscheduler (pd->tid, policy, |
| 58 | param) == -1, 0)) |
| 59 | result = errno; |
| 60 | else |
| 61 | { |
| 62 | /* We succeeded changing the kernel information. Reflect this |
| 63 | change in the thread descriptor. */ |
| 64 | pd->schedpolicy = policy; |
| 65 | memcpy (&pd->schedparam, orig_param, sizeof (struct sched_param)); |
| 66 | pd->flags |= ATTR_FLAG_SCHED_SET | ATTR_FLAG_POLICY_SET; |
| 67 | } |
| 68 | |
| 69 | lll_unlock (pd->lock, LLL_PRIVATE); |
| 70 | |
| 71 | return result; |
| 72 | } |
| 73 | strong_alias (__pthread_setschedparam, pthread_setschedparam) |