/[pcsx2_0.9.7]/trunk/3rdparty/w32pthreads/pthread_setschedparam.c
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Contents of /trunk/3rdparty/w32pthreads/pthread_setschedparam.c

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Revision 10 - (show annotations) (download)
Mon Sep 6 11:40:06 2010 UTC (9 years, 5 months ago) by william
File MIME type: text/plain
File size: 3371 byte(s)
exported r3113 from ./upstream/trunk
1 /*
2 * sched_setschedparam.c
3 *
4 * Description:
5 * POSIX thread functions that deal with thread scheduling.
6 *
7 * --------------------------------------------------------------------------
8 *
9 * Pthreads-win32 - POSIX Threads Library for Win32
10 * Copyright(C) 1998 John E. Bossom
11 * Copyright(C) 1999,2005 Pthreads-win32 contributors
12 *
13 * Contact Email: rpj@callisto.canberra.edu.au
14 *
15 * The current list of contributors is contained
16 * in the file CONTRIBUTORS included with the source
17 * code distribution. The list can also be seen at the
18 * following World Wide Web location:
19 * http://sources.redhat.com/pthreads-win32/contributors.html
20 *
21 * This library is free software; you can redistribute it and/or
22 * modify it under the terms of the GNU Lesser General Public
23 * License as published by the Free Software Foundation; either
24 * version 2 of the License, or (at your option) any later version.
25 *
26 * This library is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * Lesser General Public License for more details.
30 *
31 * You should have received a copy of the GNU Lesser General Public
32 * License along with this library in the file COPYING.LIB;
33 * if not, write to the Free Software Foundation, Inc.,
34 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
35 */
36
37 #include "ptw32pch.h"
38 #include "sched.h"
39
40 int
41 pthread_setschedparam (pthread_t thread, int policy,
42 const struct sched_param *param)
43 {
44 int result;
45
46 /* Validate the thread id. */
47 result = pthread_kill (thread, 0);
48 if (0 != result)
49 {
50 return result;
51 }
52
53 /* Validate the scheduling policy. */
54 if (policy < SCHED_MIN || policy > SCHED_MAX)
55 {
56 return EINVAL;
57 }
58
59 /* Ensure the policy is SCHED_OTHER. */
60 if (policy != SCHED_OTHER)
61 {
62 return ENOTSUP;
63 }
64
65 return (ptw32_setthreadpriority (thread, policy, param->sched_priority));
66 }
67
68
69 int
70 ptw32_setthreadpriority (pthread_t thread, int policy, int priority)
71 {
72 int prio;
73 int result;
74 ptw32_thread_t * tp = (ptw32_thread_t *) thread.p;
75
76 prio = priority;
77
78 /* Validate priority level. */
79 if (prio < sched_get_priority_min (policy) ||
80 prio > sched_get_priority_max (policy))
81 {
82 return EINVAL;
83 }
84
85 #if (THREAD_PRIORITY_LOWEST > THREAD_PRIORITY_NORMAL)
86 /* WinCE */
87 #else
88 /* Everything else */
89
90 if (THREAD_PRIORITY_IDLE < prio && THREAD_PRIORITY_LOWEST > prio)
91 {
92 prio = THREAD_PRIORITY_LOWEST;
93 }
94 else if (THREAD_PRIORITY_TIME_CRITICAL > prio
95 && THREAD_PRIORITY_HIGHEST < prio)
96 {
97 prio = THREAD_PRIORITY_HIGHEST;
98 }
99
100 #endif
101
102 result = pthread_mutex_lock (&tp->threadLock);
103
104 if (0 == result)
105 {
106 /* If this fails, the current priority is unchanged. */
107 if (0 == SetThreadPriority (tp->threadH, prio))
108 {
109 result = EINVAL;
110 }
111 else
112 {
113 /*
114 * Must record the thread's sched_priority as given,
115 * not as finally adjusted.
116 */
117 tp->sched_priority = priority;
118 }
119
120 (void) pthread_mutex_unlock (&tp->threadLock);
121 }
122
123 return result;
124 }

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