1062c5bc4SJason Schmidlapp /*
2062c5bc4SJason Schmidlapp * sched_setschedparam.c
3062c5bc4SJason Schmidlapp *
4062c5bc4SJason Schmidlapp * Description:
5062c5bc4SJason Schmidlapp * POSIX thread functions that deal with thread scheduling.
6062c5bc4SJason Schmidlapp *
7062c5bc4SJason Schmidlapp * --------------------------------------------------------------------------
8062c5bc4SJason Schmidlapp *
9062c5bc4SJason Schmidlapp * Pthreads-embedded (PTE) - POSIX Threads Library for embedded systems
10062c5bc4SJason Schmidlapp * Copyright(C) 2008 Jason Schmidlapp
11062c5bc4SJason Schmidlapp *
12062c5bc4SJason Schmidlapp * Contact Email: jschmidlapp@users.sourceforge.net
13062c5bc4SJason Schmidlapp *
14062c5bc4SJason Schmidlapp *
15062c5bc4SJason Schmidlapp * Based upon Pthreads-win32 - POSIX Threads Library for Win32
16062c5bc4SJason Schmidlapp * Copyright(C) 1998 John E. Bossom
17062c5bc4SJason Schmidlapp * Copyright(C) 1999,2005 Pthreads-win32 contributors
18062c5bc4SJason Schmidlapp *
19062c5bc4SJason Schmidlapp * Contact Email: rpj@callisto.canberra.edu.au
20062c5bc4SJason Schmidlapp *
21062c5bc4SJason Schmidlapp * The original list of contributors to the Pthreads-win32 project
22062c5bc4SJason Schmidlapp * is contained in the file CONTRIBUTORS.ptw32 included with the
23062c5bc4SJason Schmidlapp * source code distribution. The list can also be seen at the
24062c5bc4SJason Schmidlapp * following World Wide Web location:
25062c5bc4SJason Schmidlapp * http://sources.redhat.com/pthreads-win32/contributors.html
26062c5bc4SJason Schmidlapp *
27062c5bc4SJason Schmidlapp * This library is free software; you can redistribute it and/or
28062c5bc4SJason Schmidlapp * modify it under the terms of the GNU Lesser General Public
29062c5bc4SJason Schmidlapp * License as published by the Free Software Foundation; either
30062c5bc4SJason Schmidlapp * version 2 of the License, or (at your option) any later version.
31062c5bc4SJason Schmidlapp *
32062c5bc4SJason Schmidlapp * This library is distributed in the hope that it will be useful,
33062c5bc4SJason Schmidlapp * but WITHOUT ANY WARRANTY; without even the implied warranty of
34062c5bc4SJason Schmidlapp * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
35062c5bc4SJason Schmidlapp * Lesser General Public License for more details.
36062c5bc4SJason Schmidlapp *
37062c5bc4SJason Schmidlapp * You should have received a copy of the GNU Lesser General Public
38062c5bc4SJason Schmidlapp * License along with this library in the file COPYING.LIB;
39062c5bc4SJason Schmidlapp * if not, write to the Free Software Foundation, Inc.,
40062c5bc4SJason Schmidlapp * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
41062c5bc4SJason Schmidlapp */
42062c5bc4SJason Schmidlapp
43062c5bc4SJason Schmidlapp #include "pthread.h"
44062c5bc4SJason Schmidlapp #include "implement.h"
45062c5bc4SJason Schmidlapp #include "sched.h"
46062c5bc4SJason Schmidlapp
47062c5bc4SJason Schmidlapp int
pthread_setschedparam(pthread_t thread,int policy,const struct sched_param * param)48062c5bc4SJason Schmidlapp pthread_setschedparam (pthread_t thread, int policy,
49062c5bc4SJason Schmidlapp const struct sched_param *param)
50062c5bc4SJason Schmidlapp {
51062c5bc4SJason Schmidlapp int result;
52062c5bc4SJason Schmidlapp
53062c5bc4SJason Schmidlapp /* Validate the thread id. */
54062c5bc4SJason Schmidlapp result = pthread_kill (thread, 0);
55062c5bc4SJason Schmidlapp if (0 != result)
56062c5bc4SJason Schmidlapp {
57062c5bc4SJason Schmidlapp return result;
58062c5bc4SJason Schmidlapp }
59062c5bc4SJason Schmidlapp
60062c5bc4SJason Schmidlapp /* Validate the scheduling policy. */
61062c5bc4SJason Schmidlapp if (policy < SCHED_MIN || policy > SCHED_MAX)
62062c5bc4SJason Schmidlapp {
63062c5bc4SJason Schmidlapp return EINVAL;
64062c5bc4SJason Schmidlapp }
65062c5bc4SJason Schmidlapp
66062c5bc4SJason Schmidlapp /* Ensure the policy is SCHED_OTHER. */
67062c5bc4SJason Schmidlapp if (policy != SCHED_OTHER)
68062c5bc4SJason Schmidlapp {
69062c5bc4SJason Schmidlapp return ENOTSUP;
70062c5bc4SJason Schmidlapp }
71062c5bc4SJason Schmidlapp
72062c5bc4SJason Schmidlapp return (pte_setthreadpriority (thread, policy, param->sched_priority));
73062c5bc4SJason Schmidlapp }
74062c5bc4SJason Schmidlapp
75062c5bc4SJason Schmidlapp
76062c5bc4SJason Schmidlapp int
pte_setthreadpriority(pthread_t thread,int policy,int priority)77062c5bc4SJason Schmidlapp pte_setthreadpriority (pthread_t thread, int policy, int priority)
78062c5bc4SJason Schmidlapp {
79062c5bc4SJason Schmidlapp int prio;
80062c5bc4SJason Schmidlapp int result;
81*a12978ccSJeremy Soller pte_thread_t * tp = (pte_thread_t *) thread;
82062c5bc4SJason Schmidlapp
83062c5bc4SJason Schmidlapp prio = priority;
84062c5bc4SJason Schmidlapp
85062c5bc4SJason Schmidlapp /* Validate priority level. */
86062c5bc4SJason Schmidlapp if (prio < sched_get_priority_min (policy) ||
87062c5bc4SJason Schmidlapp prio > sched_get_priority_max (policy))
88062c5bc4SJason Schmidlapp {
89062c5bc4SJason Schmidlapp return EINVAL;
90062c5bc4SJason Schmidlapp }
91062c5bc4SJason Schmidlapp
92062c5bc4SJason Schmidlapp result = pthread_mutex_lock (&tp->threadLock);
93062c5bc4SJason Schmidlapp
94062c5bc4SJason Schmidlapp if (0 == result)
95062c5bc4SJason Schmidlapp {
96062c5bc4SJason Schmidlapp /* If this fails, the current priority is unchanged. */
97062c5bc4SJason Schmidlapp
98062c5bc4SJason Schmidlapp if (0 != pte_osThreadSetPriority(tp->threadId, prio))
99062c5bc4SJason Schmidlapp {
100062c5bc4SJason Schmidlapp result = EINVAL;
101062c5bc4SJason Schmidlapp }
102062c5bc4SJason Schmidlapp else
103062c5bc4SJason Schmidlapp {
104062c5bc4SJason Schmidlapp /*
105062c5bc4SJason Schmidlapp * Must record the thread's sched_priority as given,
106062c5bc4SJason Schmidlapp * not as finally adjusted.
107062c5bc4SJason Schmidlapp */
108062c5bc4SJason Schmidlapp tp->sched_priority = priority;
109062c5bc4SJason Schmidlapp }
110062c5bc4SJason Schmidlapp
111062c5bc4SJason Schmidlapp (void) pthread_mutex_unlock (&tp->threadLock);
112062c5bc4SJason Schmidlapp }
113062c5bc4SJason Schmidlapp
114062c5bc4SJason Schmidlapp return result;
115062c5bc4SJason Schmidlapp }
116