1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/* Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <sched.h>
#include <string.h>
#include <sched.h>
#include "pthreadP.h"
#include <lowlevellock.h>
int
pthread_setschedprio (threadid, prio)
pthread_t threadid;
int prio;
{
struct pthread *pd = (struct pthread *) threadid;
/* Make sure the descriptor is valid. */
if (INVALID_TD_P (pd))
/* Not a valid thread handle. */
return ESRCH;
int result = 0;
struct sched_param param;
param.sched_priority = prio;
lll_lock (pd->lock, LLL_PRIVATE);
/* If the thread should have higher priority because of some
PTHREAD_PRIO_PROTECT mutexes it holds, adjust the priority. */
if (__builtin_expect (pd->tpp != NULL, 0) && pd->tpp->priomax > prio)
param.sched_priority = pd->tpp->priomax;
/* Try to set the scheduler information. */
if (__builtin_expect (sched_setparam (pd->tid, ¶m) == -1, 0))
result = errno;
else
{
/* We succeeded changing the kernel information. Reflect this
change in the thread descriptor. */
param.sched_priority = prio;
memcpy (&pd->schedparam, ¶m, sizeof (struct sched_param));
pd->flags |= ATTR_FLAG_SCHED_SET;
}
lll_unlock (pd->lock, LLL_PRIVATE);
return result;
}
|
