| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Copyright (C) 2002-2016 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 <string.h> |
| 21 | #include "pthreadP.h" |
| 22 | #include <lowlevellock.h> |
| 23 | |
| 24 | |
| 25 | int |
| 26 | __pthread_getschedparam (pthread_t threadid, int *policy, |
| 27 | struct sched_param *param) |
| 28 | { |
| 29 | struct pthread *pd = (struct pthread *) threadid; |
| 30 | |
| 31 | /* Make sure the descriptor is valid. */ |
| 32 | if (INVALID_TD_P (pd)) |
| 33 | /* Not a valid thread handle. */ |
| 34 | return ESRCH; |
| 35 | |
| 36 | int result = 0; |
| 37 | |
| 38 | lll_lock (pd->lock, LLL_PRIVATE); |
| 39 | |
| 40 | /* The library is responsible for maintaining the values at all |
| 41 | times. If the user uses an interface other than |
| 42 | pthread_setschedparam to modify the scheduler setting it is not |
| 43 | the library's problem. In case the descriptor's values have |
| 44 | not yet been retrieved do it now. */ |
| 45 | if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0) |
| 46 | { |
| 47 | if (__sched_getparam (pd->tid, &pd->schedparam) != 0) |
| 48 | result = 1; |
| 49 | else |
| 50 | pd->flags |= ATTR_FLAG_SCHED_SET; |
| 51 | } |
| 52 | |
| 53 | if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0) |
| 54 | { |
| 55 | pd->schedpolicy = __sched_getscheduler (pd->tid); |
| 56 | if (pd->schedpolicy == -1) |
| 57 | result = 1; |
| 58 | else |
| 59 | pd->flags |= ATTR_FLAG_POLICY_SET; |
| 60 | } |
| 61 | |
| 62 | if (result == 0) |
| 63 | { |
| 64 | *policy = pd->schedpolicy; |
| 65 | memcpy (param, &pd->schedparam, sizeof (struct sched_param)); |
| 66 | } |
| 67 | |
| 68 | lll_unlock (pd->lock, LLL_PRIVATE); |
| 69 | |
| 70 | return result; |
| 71 | } |
| 72 | strong_alias (__pthread_getschedparam, pthread_getschedparam) |